最新刊期
      卷 41 ， 期 4 ， 2021
      • Vol. 41, Issue 4, Pages: 393(2021)
        摘要：<正>时间:2021年8月3-6日地点:南昌1.会议主办单位中国机械丁程学会铸造分会《特种铸造及有色合金》杂志社（武汉）南昌航空大学2.会议承办单位《特种铸造及有色合金》杂志社（武汉）3.会议时间2021年8月3-6日4.会议地点南昌嘉莱特经典国际酒店5.征文内容（1）铸造有色合金（包括铝、镁、钛等轻有色合金,铜、锌等重有色合金,中间合金,高温合金及特种合金）、复合材料（包括铝、镁、钛、铜、锌、钢等基体）的研究与应用;  
          
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        发布时间：2023-12-18
      • Liu Wencai,Wen Lu,Meng Dehao,Zhang Qiu,Wu Guohua
        Vol. 41, Issue 4, Pages: 397-401(2021) DOI: 10.15980/j.tzzz.2021.04.001
        摘要：The active rare earth element Y can easily transform to yttrium oxide inclusions during the melting and casting of magnesium alloys,resulting in the yield reduction of Y-containing magnesium alloy castings,which has become one of the key bottlenecks in the promotion and application of Y-containing magnesium alloys.The microstructure and mechanical properties of Mg-xGd-（12-x）Y-0.5Zn-0.5Zr（x=9,10,11,12）alloy were investigated with part of Y substituted for Gd under the premise of keeping the fixed total mass fraction of rare earths.The results indicate that the phase composition of the as-cast alloy is mainly composed ofα-Mg matrix and（Mg,Zn）5（Gd,Y）eutectic phase,and the second phase is almost completely dissolved after solution treatment,with the second phase particles of Mg5Gd,Mg3Gd or Mg2Gd remaining.Alloys containing Y element can reach the peak hardness at 16 h,while the Mg-12Gd-0.5Zn-0.5Zr alloy reaches the peak hardness at 64 h,which is significantly lower than that of the other alloys contained Y.In three states of as-cast,solid solution and peak aging,Mg-9Gd-3Y-0.5Zn-0.5Zr and Mg-12Gd-0.5Zn-0.5Zr alloys always exhibit a lower elongation.  
        关键词：Mg-Gd Series Alloy;Alloying;Microstructure;Mechanical Properties   
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        发布时间：2023-12-18
      • Bai Yuelong,Zhang Zhifeng,Fan Jianzhong
        Vol. 41, Issue 4, Pages: 402-405(2021) DOI: 10.15980/j.tzzz.2021.04.002
        摘要：The semi-solid stirring casting method was employed to prepare the 17% SiCp/A357 aluminum matrix composites.The effects of the processing parameters including stirring temperature,stirring rate and stirring time on the homogeneous distribution of SiCpparticles were investigated and the process was optimized.The results reveal that the stirring in semi-solid temperature range of the alloy is beneficial to reduce inspiratory and promote uniform distribution of SiCp particles compared with liquid stirring,while SiCpparticles will be pushed to the boundary by larger primary phase during the process with a lower temperature,resulting in uneven distribution of SiCpparticles.The distribution uniformity of SiCpcan be increased by increasing stirring rate and prolonging stirring time,which will tend to be deteriorated with a longer time.The optimized stirring process parameters under test conditions are presented as follows:stirring temperature of 610℃,stirring speed of 800 r/min,stirring time of 20 min.SiCpparticles are evenly distributed in the ingot structure of large-scale aluminum matrix composites with φ240 mm×330 mm and 41 kg.  
        关键词：SiCp Particles;Aluminum Matrix Composites;Semi-solid Stirring   
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 401(2021)
        摘要：<正>中国铸造协会通过视频会议的形式主持召开了由江苏文灿压铸有限公司、华南理工大学、雄邦压铸（南通）有限公司、天津雄邦压铸有限公司、南通大学共同完成的"大尺寸薄壁复杂新能源汽车铝合金结构件制备技术的研发与产业化"项目的科技成果评价会。  
          
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 415(2021)
        摘要：<正>近日,力劲集团发布了其子品牌IDRA的X-PRESS6000两板压铸机,这是一款锁模力为60 000kN的两板压铸机。据介绍,X-PRESS系列是IDRA最新的机型,锁模力从10 000～60 000kN,让更多用户能够使用意大利的先进技术。据悉,X-PRESS系列具有稳定、精密、高效生产等优势,其省去机铰部分和减少一块模板,使得其容模空间更大。与同吨位的三板压铸机相比,其体积更小、质量更轻,为压铸机超大型化的趋势提供了更多可能。与此同时,两模板压铸机重复精度更高,生产压铸件产品的一致性更高,品质更稳定。  
          
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 433(2021)
        摘要：<正>据悉,新疆众和此前推出了配股方案,拟募资投向年产500t超高纯铝基溅射靶坯等项目,从而实现靶材原材料的批量供给。据了解,超高纯铝靶坯是微电子行业的重要原材料,广泛应用于半导体芯片、平面显示器、太阳能电池等领域。作为国内一家可以规模生产超高纯铝基溅射靶材坯料公司,新疆众和投建此项目可谓契合行业热点,紧抓市场需求,有望提升公司的整体竞争实力。  
          
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 453(2021)
        摘要：<正>国家统计局发布消息,2021年1～2月,全国规模以上工业企业的工业机器人产量4.54万套,同比增长117.6%,创下历年同期新高。分析指出,得益于疫情刺激,制造业长期被人为压制的升级转型需求得到释放,加上当下用工难问题凸显,借助国家智能制造转型升级战略契机,工业机器人迎来来了大爆发机遇,3C、汽车、光伏等下游机器人应用产业的持续景气,促进了工业机器人的应用。行业内人士也对工业机器人发展前景一片看好。  
          
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 489(2021)
        摘要：<正>嘉瑞国际控股有限公司2020年实现收入14.69亿港元,同比降5.5%;股东应占溢利1.24亿港元,同比增39.8%。其中,镁合金压铸业务收入4.17亿港元,同比下降15.9%,占集团整体收入的28.4%;铝合金压铸业务收入1.13亿港元,较2019年度减少19.8%,占集团总收入的7.7%;锌合金压铸业务收入1.11亿港元,较2019年度减少29.8%,占集团总收入7.6%。  
          
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 517(2021)
        摘要：<正>万丰科技是万丰集团旗下一家国家级高新技术企业,专业从事机器人自动化装备,低压、差压、重力铸造设备等的研发与制造。近年来,公司一直坚持科技创新,积极推动企业自动化、数字化、智能化建设,建立了机器人研究院,增强自主创新能力,加强产学研用一体化发展,培育了先进制造机器人产品与技术创新团队、增材设备与关键工艺创新团队、机器人和3D打印技术创新团队等多支领军型创新创业团队,拥有授权专利120多项,参与起草《低压铸造机技术条件》《工业机器人重力浇注》等国家和行业标准12项。由万丰科技自主研发的低压（差压、重力）铸造机及配套自动化项目还替代国外进口,并出口至美国、法国、俄罗斯、印度、墨西哥等国家,广泛应用于汽车零部件、摩托车零部件、高压开关、电子电力、工程机械、轨道交通、航空航天等领域。  
          
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 530-531(2021)
        摘要：<正>当前,机器锻造工艺是制造业的关键构成之一,是现代工业系统的基本纽带。基本上,机械锻造大体是通过机械锻压机压轧镁、铜、铝、钢等金属材料,并进行诸多的压力挤压,在加人化学溶剂的情况下,得到某些技术参数、形状以及力学性能。从机械锻件的特定应用领域着眼,锻件主要用于我国的基础性行业,例如石油化工、武器、飞机、船舶、柴油机、采矿以及核领域等基础工业领域。  
          
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      • Vol. 41, Issue 4, Pages: 532-533(2021)
        摘要：<正>计算机技术飞速发展,微处理器的应用已渗透到不同的工业领域,并已成为国家工业水平的主要代表。它为组织科学的生产以及管理、降低生产成本、提高产品的质量提供重要的基础。配料优化应用线性的编程方法,目的是从现有的众多价格以及化学成分中找到实现最低成本且与成分要求相符的配料方式。计算配料优化的复杂性为实际的应用增添了很多的困难。使用强大的计算机处理、分析数据,计算并基于其功能开发的计算机配料优化系统,对优化铸造合金配料带来积极的效果。在整体设计这类软件时,在程序的典型框图中,对应的窗口提供了每个功能,由每个控件以及有关的程序代码指令来完成。  
          
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 534-535(2021)
        摘要：<正>随着我国提倡全民健身,体育器材逐渐被更加广泛地应用。通过使用体育器材,居民能够有效提升身体素质,达到强身健体的作用。体育器材能够有效提升人们对健身和体育项目的兴趣度,让更多年龄层的人都能够积极主动投人到运动当中来。为确保体育器材的使用满意度,适合的铸造方法对体育器材的功能有着十分重要的意义。镁以及镁合金是目前地球上现有的质量最轻的金属结构材料,具有优质的机加工性能、对电磁能够有效屏蔽、密度小、阻尼性能高、零件尺寸稳定、易回收利用等特点。镁合金虽然在诸多领域被广泛应用,但工业占比较少。  
          
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      • Vol. 41, Issue 4, Pages: 536-537(2021)
        摘要：<正>铸造是现代化的机械制造中重要的一项工艺,如果机器制造商想在竞争激烈的市场环境中抢占先机,就需要注意其生产的效率。对此,必要的合作与沟通是必不可少的。伴随国际合作的不断发展与深化,国家间加强了紧密的学习与交流,铸造类领域的发展也取得了长足的进步,然而对铸造类专业英语也有了更高要求。所以,铸造类专业的英语课程设计非常重要。  
          
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 538-539(2021)
        摘要：<正>当前,在视觉传达领域,数字媒体技术为其提供了设计所需的各种媒介与技术上的支持,不断扩宽视觉传达设计的空间范畴,深挖其设计资源,使视觉信息更加直观明了,清晰地呈现在人们的眼前。在铸造行业,铸件产品的视觉设计可为其提供更好的感官体验以及美学效果,近几年来数字媒体被应用于这一领域,取得了很好的成就。我国的一些铸造企业以数字技术为基础,以高速可视化的通信为主要目的,为了提高客户的体验效果,努力打造引人人胜的广告媒介网站,以吸引消费者的注意力,刺激潜在的消费者购买。  
          
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 540-541(2021)
        摘要：<正>现阶段我国的武术器械发展并不先进,无法进行国际化的武术推广,因此必须要进行创新与改进,提升武术器械的科技含量,突出其体育性质才能够更好地推动和传播我国的武术文化。武术器械作为传统武术最为关键的道具,能够起到延伸人类肢体的作用,是人类智慧的体现也是现实条件的延伸。中华武术文化根基深厚,源远流长,武术器械也随着武术文化逐渐发展。原始社会及封建社会时期的冷兵器时代,武术器械的铸造工艺受到了生产水平的限制,从石器时代到铜器时代再到铁器时代,生产力的不断进步都推动了武术器械的质地与外形的不断变革。  
          
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 542-543(2021)
        摘要：<正>网络技术与数字信息技术的飞速发展推动了新媒体时代的快速融合,教育行业在这样的大背景下也进行着改革与创新发展。发达的科学技术为新媒体教学提供了强有力的支持,而新媒体技术则为高校铸造专业学术思政教育提供了更多的资源和教学方法。新媒体不仅包含了数字化技术也包含了网络资源。随着全球经济化发展,社会市场经济环境正在与信息技术进行融合,市场竞争加剧造成了高校学生巨大的心理压力。各大高校在对教学目标以及教学发展方向方面也受到了社会客观环境和需求的影响,思政教育在高校的教育体系中显示出重要的作用。  
          
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      • Vol. 41, Issue 4, Pages: 544-545(2021)
        摘要：<正>髙校是为社会培养人才提供人才常备军的基地,现代理工科高校学生不仅要夯实所学知识,更要将理论与实践充分结合。在培养学生综合能力的同时,高校也应当注重学生的自我思想提升和发展。党中央强调,应当加强并且改进高校中党的建设,这样才能够办好具有中国特色的社会主义高校。如何落实高校党建,做好理工科高校学生的思想政治工作,有效促进高等教育的发展和改革,这也是当前各大高校的思政教育建设需要考虑的问题。理工科高校教师可以结合《新时代高校课程思政教学创新研究》积极开展高校思政教育教学工作。  
          
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      • Chen Dahui,Chen Zheng,Hong Xiaolu,Zhu honglei,Xu Ying,Liu Yongqiang,Zhang Jiang,Peng Yinjiang
        Vol. 41, Issue 4, Pages: 406-410(2021) DOI: 10.15980/j.tzzz.2021.04.003
        摘要：In order to develop cast aluminum alloy material based on Al-Ni eutectic system,effects of Zn,Mg,Cu and Fe elements on microstructure,thermal analysis curves and mechanical properties of Al-Ni alloys were comparatively investigated by sand casting and squeeze casting.The results indicate that Al2Mg3Zn3 and MgZn2 phases with great aging strengthening effect are formed from Zn and Mg,without reacting with Ni to form any new second phases yet,while Cu and Fe can react with Ni to form a large number of Al3CuNi phase and Al9FeNi phases respectively.The amounts of eutectic phases are decreased due to the addition of Zn,Mg,and Cu,broadening the solidification interval and reducing the casting performances,while the addition of Fe has the contrary effect.Moreover,Zn and Mg are the most effective strengthening elements in Al-Ni alloys,which are superior to Cu and Fe from comparative analysis of mechanical properties.  
        关键词：Al-Ni Eutectic Alloy;Aging Strengthening;Casting Performances   
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      • Zhang Zhiying,Sun Lei,Yue Shumin,Yu Hongliang,Shen Xin
        Vol. 41, Issue 4, Pages: 410-415(2021) DOI: 10.15980/j.tzzz.2021.04.004
        摘要：The corrosion and electrochemical properties of Zr56Cu19Ni11Al9Nb5amorphous alloy in various HCl solutions were investigated using immersion tests,potentiodynamic polarization tests,scanning electron microscopy（SEM）and energy dispersive X-ray spectroscopy（EDS）.Immersion tests reveal that absence of significant corrosion is observed after immersion in 0.01,0.1and 1mol/L HCl solutions for 2 256hand in 2mol/L HCl solution for 720h,presenting the acceptable corrosion resistance.The corrosion resistance is decreased with the increase of HCl concentration,and severe corrosion occurs after immersion in 5 mol/L HCl solution for 168h.Potentiodynamic polarization tests demostrate that the spontaneous corrosion potential Ecorris dropped gradually from 0.402V （vs.SCE）to-0.245V （vs.SCE）,with the corrosion current density jcorrincreased gradually from 5.212×10-8A/cm2to 6.095×10-5A/cm2,showing that the corrosion resistance is gradually deteriorated,which is consistent with the result of immersion test.SEM/EDS analysis indicates that the corrosion products are mainly oxides,such as ZrO2and Cu2O.  
        关键词：Amorphous Alloy;Corrosion;Electrochemical Properties;Potentiodynamic Polarization Test   
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      • Zhou Yuli,Zhang Junchao,Lin Shipeng,Zhong Gu
        Vol. 41, Issue 4, Pages: 416-419(2021) DOI: 10.15980/j.tzzz.2021.04.005
        摘要：Al-9Si-0.2Mg-xFe alloys with different Fe content were prepared by gravity casting,and the effects of Fe element on the microstructures,thermal conductivity and mechanical properties of Al alloys were investigated through OM,SEM and EDS analysis.The results indicate that with Fe increasing from 0.1% to 1.0%,the morphology of iron-containing intermetallic is converted from script likeπphase to needle likeβphase,and the dimension is increased from several microns to larger than 100μm.Correspondingly,the thermal conductivity,tensile strength and elongation of alloys are decreased by 6%,11.7% and 66%,respectively,and a sharper decrease occurs when the Fe content is over 0.6%.  
        关键词：Fe Element;Casting Aluminum Alloy;Thermal Conductivity;Mechanical Properties   
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      • Hu Qiyao,Guo Wenbo,Xiao Peng,Zhao Haidong
        Vol. 41, Issue 4, Pages: 420-425(2021) DOI: 10.15980/j.tzzz.2021.04.006
        摘要：A vacuum-assisted die-casting experiments of SiC/6061 composites were carried out,and the formation mechanism of the surface layer and the internal pores of samples with different wall thicknesses,and their influence on the mechanical properties of the samples were investigated.The results show that there exists a surface layer with a thickness of about 0.5 mm in the samples with different wall thicknesses,and the 2 mm wall thickness samples are dominated by scattered gas pores.When the wall thickness is increased to 4 mm,the pores are dominated by gas-shrinkage pores.Large-sized shrinkage pores are discovered,and most of pores are concentrated in the central area of the sample axis.During the tensile test process,large shrinkage pores can induce brittle fracture of the sample,and the internal particles can cause brittle failure of the surface layer,resulting in a decrease in the tensile properties of the HPDC SiC/6061 composites.  
        关键词：Metal Matrix Composites;Vacuum Assisted Die Casting;Surface Layer;Pore Characteristics;Mechanical Properties   
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        发布时间：2023-12-18
      • Ouyang Xu,Wang Kexu,Wu Junkang,Peng Huiquan
        Vol. 41, Issue 4, Pages: 425-428(2021) DOI: 10.15980/j.tzzz.2021.04.007
        摘要：The isothermal constant strain rate compression test was carried out by a Gleeble-3500 thermal simulation tester.The flow stress behavior of Ti-25Nb alloy at 470～620℃and 0.001～10 s-1 was investigated and constitutive model was established based on BP neural network.The results reveal that the true stress of Ti-25Nb alloy has negative temperature and positive strain rate sensibility,showing the characteristics of flow softening under any deformation condition.The constitutive model based on BP neural network has a high calculation accuracy with correlation coefficient of 0.999 6,relative error of 4.27% and average absolute relative error of 1.33%,which can well describe and predict the flow stress behavior of Ti-25Nb alloy.  
        关键词：Ti-25Nb Alloy;Flow Stress Behavior;Constitutive Model;BP Neural Network   
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        发布时间：2023-12-18
      • Wu Yongqiang,Wang Kaikun
        Vol. 41, Issue 4, Pages: 429-433(2021) DOI: 10.15980/j.tzzz.2021.04.008
        摘要：The finite element models including solidification with mold and ultra-high temperature demoulding were established in DEFORM-3D simulation software.Ingots with a certain liquid core were prepared and analyzed based on the simulation of the solidification process.The distributions of the temperature field under various ingot molds were presented,where the solidus and liquidus temperature of the material were used to distinguish the dimension of the solid-phase region,the liquid-phase region and the solid-liquid two-phase region.The influence law of different ingot molds on the position and the dimension of those regions was revealed.Moreover,a series of new ingot molds were designed based on the simulation analysis of solidification process of liquid core ingot,providing theoretical reference for practical production.  
        关键词：Deform-3D;Solidification with Mold;Temperature Field Simulation;Solid-liquid Two-phase Region   
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        发布时间：2023-12-18
      • Mo Wenbin,Jia Guilong,Huang Kui,Lou Yue,Wu Zhiming,Wu Jian
        Vol. 41, Issue 4, Pages: 434-438(2021) DOI: 10.15980/j.tzzz.2021.04.009
        摘要：Segregation method is a more efficient and energy-saving physical metallurgy method than electrochemical refining for preparing high purity aluminum.The preparation of high purity aluminum by segregation method was reviewed in detail at home and abroad,and the basic research progress of directional solidification technology was briefly introduced,and its development direction was prospected.  
        关键词：High Purity Aluminum;Segregation Purification;Directional Solidification   
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        发布时间：2023-12-18
      • Zhang Shan,Yin Dawei,Wang Feilong,LüJingwang,Shi Zhilin,Ma Mingzhen
        Vol. 41, Issue 4, Pages: 439-444(2021) DOI: 10.15980/j.tzzz.2021.04.010
        摘要：The basic technical routes of superplastic forming and casting forming of amorphous alloy were put forward,and the research progress of that in recent years was summarized.The specific research achievements at home and abroad in the field of component forming of amorphous alloy were presented.The advantages and problems of superplastic forming and casting forming of amorphous alloys were also expounded.  
        关键词：Amorphous Alloy;Thermoplastic Forming;Casting Forming   
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        发布时间：2023-12-18
      • Xie Dongyuan,Zhou Quan,Chen Ge,Chen Leping,Li Peng
        Vol. 41, Issue 4, Pages: 445-449(2021) DOI: 10.15980/j.tzzz.2021.04.011
        摘要：The effects of 0～0.18% Sr on the solidification structure and mechanical properties of Mg-6Gd-3Y-0.6Zr alloy were investigated by OM,SEM,EDS,XRD,ICP-AES,universal tensile testing machine and other testing methods.The results show that with the increase of Sr addition,grain size in the alloy is decreased gradually from 42.5μm to 21.8μm.The second phase is increased gradually with the decrease of size gradually,and its distribution is improved gradually.Tensile strength and elongation of the alloy are increased gradually from 170 MPa and 7.2% to 192 MPa and 12.9%,respectively.Under the condition of the given experiment,mechanical properties of the alloy is mainly controlled by solidification structure of the alloy.With decreasing in the solidification structure,the mechanical properties are improved obviously.  
        关键词：Sr;Mg-Gd-Y-Zr Alloy;Solidified Structure;Tensile Properties   
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        发布时间：2023-12-18
      • Li Yuanbin,Lu Qiang,Wang Jicheng,Li Kai,Zhang Ying,Li Gunan,Du Yong
        Vol. 41, Issue 4, Pages: 449-453(2021) DOI: 10.15980/j.tzzz.2021.04.012
        摘要：Regarding to traditional casting process and the requirements of semi-solid die casting process,phase diagram calculation（CALPHAD）was used to optimize the composition and heat treatment processes of a cast AlSi-Mg-Fe-Mn alloy to avoid the formation of brittleβ-AlFeSi phases,leading to the alloy with optimized microstructure and improved performance consequently.Meanwhile,the in-situ tensile deformation behaviors of the AlSi alloy were investigated.The result indicate that the cracks are mainly originated from the fracture of eutectic Si particles and intermetallic compound particles.Microcracks connect with each other and propagate along the slip band,resulting in eventual fracture of specimens.  
        关键词：Al-Si Alloy;Phase Diagram Calculation;Alloy Composition Optimization;In-situ Tension   
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        发布时间：2023-12-18
      • Guo Yunlong,Zhao Yuhong,Yang Xiaomin,Gu Tao,Xu Fengqiang,Wu Li,Hou Hua
        Vol. 41, Issue 4, Pages: 454-457(2021) DOI: 10.15980/j.tzzz.2021.04.013
        摘要：The evolution of microstructure and mechanical properties of low stacking fault energy Cu-Al-Ni alloy after twice deformation and aging were investigated by means of thermomechanical treatment.When the comprehensive process is unidirectional cold-rolled for 80% and holding at 350 ℃for 60 min,then cold-rolled for 50%and aging at 350 ℃ for 15 min,the matching of strength and plasticity of the samples is desirable,where the strength can reach 774.35 MPa and the elongation is 5.29%,which can be attributed to deformation strengthening and precipitation strengthening.XRD analysis indicates that NiAl precipitates are generated during aging process.During annealing process,the elongation of the alloy is increased continuously,which is resulted from dislocation recovery,microstructure coarsening and fine precipitate dispersion distribution.  
        关键词：Cu-Al-Ni Alloy;Cold-Rolled Deformation;Aging;Annealing Twins;Strain Hardening Rate   
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        发布时间：2023-12-18
      • Yu Bing,Jia Zheng,Song Tingting,Fu Li
        Vol. 41, Issue 4, Pages: 458-461(2021) DOI: 10.15980/j.tzzz.2021.04.014
        摘要：Aiming at the pores and uneven structure common in 2024 industrial aluminum alloy,effects of ultrasonic power,treatment time,melt temperature and C2Cl6 pretreatment on degassing,refining and mechanical properties were investigated by high-strength ultrasonic field.The results indicate that degassing efficiency is increased with the increase of ultrasonic power and ultrasonic treatment time with a given the ultrasonic power.However,when the ultrasonic treatment time is excessive,the degassing efficiency keeps a stable.The increase of treatment temperature can greatly promote the degassing efficiency.After degasser pretreatment of 1% C2Cl6,the ultrasonic treatment time with 150 Wis reduced by 40 s,and the tensile strength,yield strength and elongation of the ingot are increased by 28.3%,6.7%and 2.4%,respectively.  
        关键词：Ultrasonic Degassing;2024 Aluminum Alloy;C2Cl6 Degasser;Hydrogen Content;Mechanical Properties   
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        发布时间：2023-12-18
      • Li Zehua,Li Chunhui,Su Xin,Feng Zhijun,Xin Shiwei,Li Yufei,Liu Wenlong
        Vol. 41, Issue 4, Pages: 462-465(2021) DOI: 10.15980/j.tzzz.2021.04.015
        摘要：Mg-Nd-Gd-Zn-Zr-xY（x=0,1.4,2.2,3.4,%,mass fraction）alloy was melted and prepared by gas protection.The effects of yttrium addition on the as-cast microstructure,element distribution and mechanical properties of the alloy after heat treatment were analyzed by optical microscopy（OM）,scanning electron microscopy（SEM）and energy dispersive spectroscopy（EDS）.The results reveal that average grain size of Mg-2.7Nd-1.5Gd-0.4Zn-0.5Zr alloy is decreased from 56μm to 48μm with 3.38% yttrium addition,which indicates that yttrium can refine the microstructure of the alloy to some extent.The tensile strength,yield strength and hardness of the alloy can be improved along with the increase of yttrium after heat treatment as a result of the increase of enrichment element area at grain boundary.When yttrium addition reaches 1.4%,the elongation of the alloy reaches the maximum value.With the Y addition of 2.2%,the comprehensive mechanical properties of the alloy present desirable,where the tensile strength,yield strength and elongation of the alloy reach 327 MPa,184 MPa and 5.5%,respectively.  
        关键词：Rare Earth Magnesium Alloy;Microstructure;Mechanical Properties   
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      • Du Qingchun,Yang Di,Yan Liangming
        Vol. 41, Issue 4, Pages: 466-470(2021) DOI: 10.15980/j.tzzz.2021.04.016
        摘要：The isothermal compression deformation behavior of Mg-Zn-Gd-Y-Zr alloy was performed on gleebl-3500 thermal simulator.The results reveal that the stress is increased with the increase of the strain.After reaching a certain value,the stress begin to decrease,and with temperature increase or strain rate decrease,stress decrease rate is decreased.The stress-strain curves presnt a typical dynamic recrystallization behavior.With increasing in deformation temperature or decreasing in strain rate,recrystallized grain fraction is increased,and recrystallized grain size is coarsened with severely broken of the coarse second phases.By analyzing the true stress-strain curve,the material parameter values of Mg-Zn-Gd-Y-Zr alloy were calculated and the constitutive equation was established.The thermal processing maps of the alloy were established based on the dynamic material model theory,and the optimal thermal processing parameters are presented as follows:deformation temperature of 400～450℃and strain rate of 0.01～0.001 s-1.  
        关键词：Rare Earth Magnesium;Hot Working;Constitutive Equation;Processing Map;Microstructure   
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        发布时间：2023-12-18
      • Li Feilong,Li Yuyi,Zhai Chuanxin,Gu Yongjun,Li Lihua,Huang Jinliang,Xiong Zhen
        Vol. 41, Issue 4, Pages: 471-473(2021) DOI: 10.15980/j.tzzz.2021.04.017
        摘要：The effects of heat treatment temperature on the hardness and slicing performance of multi-crystalline silicon brick was investigated.The hardness of the samples treated at 800℃,1 000℃and 1 100℃is increased,while that of the samples treated at 1 150℃is slightly decreased,and declined significantly at 1 200℃.The slicing performance of bricks treated above 1 200℃is desirable,and the defects such as saw mark,chipping,total thickness variation（TTV）occurred in the slicing process with diamond wire slicer are substantially improved.However,the photoelectric conversion efficiency of the battery piece made of multi-crystalline silicon brick by the conventional process after above-mentioned process is reduced significantly,which may be attributed to the diffusion of impurity elements into the brick during the heat treatment process,affecting the photoelectric conversion efficiency of the cell.  
        关键词：Casting Multi-crystalline Silicon;High Temperature Heat Treatment;Hardness;Photoelectric Conversion Efficiency   
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        发布时间：2023-12-18
      • Yan Pengyu,Mao Weimin,Fan Jing,Wang Bingkun,Liu Yabo,Yan Bingdong
        Vol. 41, Issue 4, Pages: 474-477(2021) DOI: 10.15980/j.tzzz.2021.04.018
        摘要：A390 aluminum alloy was prepared by a composite process of serpentine pouring channel（SPC）and Srmodifier.The microstructure and hanging rate of hanging metal solidified in the SPC were analyzed and the effects of Sr,commonly used as a eutectic Si modifier,on the refinement mechanism of primary Si particles（PSPs）under the cooling condition in the SPC process were investigated.The results indicate that Sr poisoned heterogeneous nucleation sites inhibits the nucleation of the PSPs,which is the dominant factor in the growth of the PSPs under rapid cooling.Further more,Sr element promotes the nucleation and growth of the PSPs by decreasing the solidliquid interface energy.On the other hand,the nucleation and growth of the PSPs are inhibited by increasing the activation energy for diffusion of silicon atoms across the solid-liquid interface.  
        关键词：A390 Aluminum Alloy;Serpentine Pouring Channel;Strontium;Primary Si;Eutectic Si   
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        发布时间：2023-12-18
      • Meng Wei,Hong Weiwei,Chen Jinxi
        Vol. 41, Issue 4, Pages: 478-483(2021) DOI: 10.15980/j.tzzz.2021.04.019
        摘要：The hot compression test was carried out for the Ti-25V-15Cr-0.2Si alloy,and the constitutive equation and dynamic recrystallization mathematical model were established based on the experimental data.The microstructure transformation of Ti-25V-15Cr-0.2Si alloy during thermal deformation was quantified and visualized by Deform-3D finite element software.The results indicate that the dynamic recrystallization volume fraction Xdynis increased and the average grain size davgis decreased continuously with the strain increase under the deformation conditions of 1 050 ℃,0.001 s-1.When the strain reaches 0.92,the davgis 58.62μm,and the relative error is within 10% compared with the experimental data.The overall morphology of the test and simulation microstructure keeps similiar from the strain amount of 0.51,indicating that the deformation begins to enter a stable deformation stage.Through the simulated microstructure observation of the alloy under different deformation conditions,it is found that the dynamic recrystallization can be accelerated and the average grain size is refined at a given deformation temperature by reducing the strain rate.while both dynamic recrystallization occurrence and the growth of recrystallized grains can be promate by increasing the temperature with the constant strain rate.Compared with the metallographic microstructure,it can be seen that the change law of the simulated microstructure is well agreement with the evolution law of the metallographic microstructure.  
        关键词：Ti-25V-15Cr-0.2Si Alloy;Dynamic Recrystallization;Microstructure   
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        发布时间：2023-12-18
      • Han Panwen,Yuan Lingyang,Ghulam Asghar,Liu Baoliang,Hu Zhiheng,Fu Penghuai,Peng Liming
        Vol. 41, Issue 4, Pages: 483-489(2021) DOI: 10.15980/j.tzzz.2021.04.020
        摘要：The effects of Zn on die casting Al-10Si-0.3Mg-0.6Mn alloy were investiagted by means of microstructure observation and tensile test.On this basis,a kind of die casting aluminum alloy with good comprehensive properties was prepared by adding Sr and RE.The experimental results reveal that the addition of Zn can improve the strength of the alloy with the decrease of elongation,however the fine eutectic Si become coarser,and long strip and massive Si can be observed.The coarsened eutectic silicon can be refined again with 0.04% Sr and 0.1% La/Ce mixed rare earth,where the yield strength,tensile strength and elongation of the alloy reach up to 167 MPa,324 MPa and 10.2%,respectively.  
        关键词：Al-10Si-0.3Mg-0.6Mn Die-casting Aluminum Alloy;Zn;Modification Treatment;Microstructure;Mechanical Properties   
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        发布时间：2023-12-18
      • He Yang,Wang Yujin,Qin Fangcheng,Meng Zhengbing
        Vol. 41, Issue 4, Pages: 490-494(2021) DOI: 10.15980/j.tzzz.2021.04.021
        摘要：The as-cast ZGMn13 and ZGMn17 liners produced by lost foam casting were treated with water toughening.The influence of different water toughening process on the structure and performance of the liner was investigated using optical microscope and micro-hardness tester.The change rules of microstructure and properties before and after the water toughening were analyzed comparatively.The results reveal that the properties of the liners are better under water toughening treatment for 1 h.As the water toughness temperature increases,the network carbide is gradually decreased,and the content of single-phase austenite is firstly increased and then decreased.The optimum water toughness treatment of ZGMn13 high manganese steel and ZGMn17 ultra-high manganese steel are to heat up to 1 080℃for 1 hand then conduct water quenching.Under the process,the microstructure is homogeneous without carbides,and hardness reaches 210 HB and 220 HB,respectively.  
        关键词：Lost Foam Casting;Wear-resistant Liner;Water Toughening;Microstructure;Network Carbide   
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        发布时间：2023-12-18
      • Huang Puying,Lu Gang,Yan Qingsong,Xu Pian,Huang Pengpeng,Liu Dong
        Vol. 41, Issue 4, Pages: 494-497(2021) DOI: 10.15980/j.tzzz.2021.04.022
        摘要：The ZL114A alloy samples were prepared using vacuum differential pressure casting method.With the help of metallographic microscope,scanning electron microscope and microhardness tester,the effects of graded pressure difference on the microstructure and micro-hardness of vacuum differential pressure casting ZL114A alloy were investigated.The results show that the graded pressure difference significantly affects the microstructure and properties of ZL114A alloy.Within the range of the graded pressure difference of 35 kPa～185 kPa,with the increase of the graded pressure difference,the squeezing ability of molten metal is also enhanced.The primary phase in ZL114A alloy is changed from coarse dendritic crystals to fine resette crystals and equiaxed crystals.The microstructure is obviously refined,and the eutectic silicon phase is changed from coarse rods or needles to fine rods or round grains.Meanwhile,the microhardness of ZL114A alloy has been significantly improved.When the graded pressure difference is 185 kPa,the microhardness reaches 96.9 HV,which is 33.4% higher than that of ones with the pressure difference of 35 kPa.  
        关键词：ZL114A alloy;Vacuum Counter-Pressure Casting;Graded Pressure Differences;Microhardness   
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        发布时间：2023-12-18
      • Liu Dezhi,Huang Lei,Zhao Xingchuan,Ma Jie,Wang Changzheng,Yin Yibin,Huang Baoxu
        Vol. 41, Issue 4, Pages: 498-501(2021) DOI: 10.15980/j.tzzz.2021.04.023
        摘要：Al-15Cu alloy samples were prepared by directional solidification device with solidification rates of 10,20 and 50μm/s.The distribution of solute element Cu conforms to Scheil equation under different solidification rates.Due to the high density of Cu,gravity segregation occurs,which makes the effective distribution coefficient kEincrease.With decreasing in the solidification rate,the gravity segregation becomes more serious.With the increase of the solidification rate or solute concentration in the liquid phase,the concentration of solute element Cu at the solid-liquid interface is increased,inhibiting the broadening of dendrite and refining the structure.Meanwhile,the component supercooling is promoted with the dendrite characteristics more obvious.  
        关键词：Directional Solidification;Al-Cu Alloy;Scheil Equation;Solidification Rate;Gravity Segregation   
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        发布时间：2023-12-18
      • Chen Weijun,Yu Huan,Xu Zhifeng,Shuai Liang,Wang Zhenjun
        Vol. 41, Issue 4, Pages: 502-507(2021) DOI: 10.15980/j.tzzz.2021.04.024
        摘要：The vacuum pressure infiltration was used to prepare the laminated puncture structural Cf/Al composites with the volume fraction of 50%,of which the reinforced material was M40 Jcarbon fiber,and the matrix alloy was ZL301.The microstructure and tensile properties in warp direction of the composites at room temperature and high temperature were investigated,and tensile failure mechanism was analyzed.The results show that at room temperature,350℃and 400℃,the tensile strength in warp direction of the composite is 650.2 MPa,619.8 MPa and 540 MPa,respectively,and the tensile modulus in warp direction is 81.78 GPa,72.76 GPa and 60.82 GPa,respectively.The tensile strength loss rates of laminated puncture structural Cf/Al composites in warp direction at 350℃and 400℃reach 4.8%and 16.95%,respectively,and the tensile modulus loss rates of laminated puncture structural Cf/Al composites in warp direction at 350 ℃ and 400 ℃reach 11% and 25.67%,respectively.The tensile mechanical properties of laminated puncture structural Cf/Al composites in warp direction are decreased significantly at 350℃～400℃than that of ones at room temperature～350 ℃,and its displacementload curve is characterized by nonlinear.The tensile failure of laminated puncture structural Cf/Al composites in warp direction at high temperature can be divided into four stages,that is integral deformation resistance stage,accumulation stage,fracture failure stage and instability fracture stage.  
        关键词：Laminated Puncture Structure;Cf/Al Composite;High Temperature Tensile Properties;Tensile Failure Mechanism   
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        发布时间：2023-12-18
      • Yang Cheng,Lu Zhuqing,Chen Baolin,Zhang Qian,Zhou Jiming,Qi Lehua
        Vol. 41, Issue 4, Pages: 508-512(2021) DOI: 10.15980/j.tzzz.2021.04.025
        摘要：In order to ensure the quality of Csf/Mg（short carbon fiber reinforced magnesium）composites manufactured by liquid-solid extrusion combining with vacuum pressure infiltration（LSEVI）process,T300 carbon fiber preform with a volume fraction of 10% was prepared by wet forming method.The infiltration test of liquid AZ91 D magnesium alloy was carried out based on the existing vacuum pressure infiltration device.Orthogonal design was used to investigate the influence of infiltration process parameters（pouring temperature,preform preheating temperature,infiltration pressure,pressure holding time）on the relative density of Csf/Mg composites.The results reveal that preheating temperature has the most significant effect on the density of Csf/Mg,followed by the infiltration pressure,and the relative density is increased with the increase of the preform preheating temperature and infiltration pressure.The optimal liquid infiltration process parameters are presented as follows:600℃,0.6 MPa,800℃,20 s,respectively.  
        关键词：Short Carbon Fiber;Magnesium;Composites;Process Parameters;Density   
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        发布时间：2023-12-18
      • Pan Long,Yu Guokang,Zou Wenbing,Cui Enqiang,Zhang Xuliang,Fei Weiqing
        Vol. 41, Issue 4, Pages: 512-517(2021) DOI: 10.15980/j.tzzz.2021.04.026
        摘要：Based on the analysis of the structural characteristics and technical difficulties of a kind of complex thinwalled GW63 K magnesium alloy cylindrical casting,the casting technology of composite casting mold was analyzed.According to the part structure,the casting technology with composite casting mold based on different sand molds was designed,and ProCAST software was used for simulation analysis.According to the simulated results,the casting technology was optimized to finally achieve sequential solidification.The results show that the internal quality of the castings under composite casting mold casting technology meets the requirements of classⅠin HB7780-2005,and the mechanical properties of the castings at T6 state reach more than 280 MPa and 3%.  
        关键词：Magnesium Alloy;Cylindrical Casting;Composite Casting Mold;Casting Process;Sequential Solidification   
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      • Qu Jialong
        Vol. 41, Issue 4, Pages: 518-520(2021) DOI: 10.15980/j.tzzz.2021.04.027
        摘要：Aiming at high defects in low-pressure casting aluminium alloy turbo-charger compressor housing,the Magma software was used to simulate the casting process.Combined with the practical production,the gating system was modified and optimized.Through eliminating shunt basin,lift pipe directly connecting with the castings,etc.,casting defects can be eliminated greatly,improving the quality of castings and casting environment.  
        关键词：Low Pressure Casting;Compressor Housing;Technology Improvement   
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        发布时间：2023-12-18
      • Vol. 41, Issue 4, Pages: 520(2021)
        摘要：<正>根据国际铝业协会（IAI）的预测,到2050年,世界铝消费量将比当前增长约80%,每年将超过1.7亿t。铝这种轻质金属有望广泛用于电动汽车,节能建筑和替代能源。但是,正如国际铝业协会指出的那样,为了防止全球变暖,在30年内,有必要将铝生产过程中产生的CO2排放量减少80%,减排的成本预估为0.5～1.5万亿美元,或每年167亿美元至500亿美元,占该行业当前收入的8.5%～25%。  
          
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      • Yang Dongli,Gao Fuhui,Na Yue
        Vol. 41, Issue 4, Pages: 521-524(2021) DOI: 10.15980/j.tzzz.2021.04.028
        摘要：The wax deformation of titanium alloy casting with arc structure was investigated,and the effects of the wax cooling method,dimensional calibration time and storage time on the wax dimension were analyzed.The results reveal that the cambered surface is warping deformed during cooling,and the deformation of wax cooled in water is more severe than that in air.The wax deformation can be controlled by appropriative wax pattern,and dimension is affected by the calibration time,which becomes stable after deformation for 3 h.The wax pattern is placed freely and continue to deform after calibration.The deformation reaches the maximum value after 1 day,the minimum value after 2 days and the dimension becomes stable after 3 days.  
        关键词：Casting Titanium Alloy;Wax Dimension Control;Calibration Time;Storage Time   
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      • Zhang He,Zhu Hongbin,Pan Botao
        Vol. 41, Issue 4, Pages: 524-526(2021) DOI: 10.15980/j.tzzz.2021.04.029
        摘要：The investment castings of the back section of convergent regulator plate were investigated,which is a typical thin-walled structure for the nozzle of aero-engine,formed by investment casting of JG4246 Asuperalloy.During the process of trial production,metallurgical defects such as crack and shrinkage are easily generated at the casting base plate and rib strip,leading to decrease of qualified rate.By optimizing the gating system and adjusting the wrapping mode of shell insulation felt,preheating temperature and pouring parameters,the key to control module gating system and shell wrapping,and the casting precautions,as well as the control measures for subsequent cleaning work were determined,thus reducing the metallurgical defects,raising the qualified rate to 85%.  
        关键词：Thin-wall Structure;JG4246A Superalloy;Crack;Shrinkage   
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      • Yang Yinqi,Li Haishu
        Vol. 41, Issue 4, Pages: 527-528(2021) DOI: 10.15980/j.tzzz.2021.04.030
        摘要：The current trend of investment casting development is to realize green casting as well as improving and stabilizing the quality of the casting.The problem that the traditional water glass（or composite）shell substituted to silicon-soluble shell in the investment casting industry is the low price of products and the increase of the manufacturing cost.The long production cycle and poor peeling performance can be solved by the improved silica sol fast drying technology and the cost reduction.  
        关键词：Investment Casting;Silica Sol Quick Drying Shell;Manufacture Cost   
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      • Vol. 41, Issue 4, Pages: 529(2021)
        摘要：<正>2021年"第27届中国铸造协会消失模V法实型分会"年会,根据疫情形势预期于2021年7月～8月举办。为做好消失模V法实型铸造分会年会交流内容的组织丁作,营造良好学术氛围,推动消失模铸造行业创新、协调、绿色、开放、共享发展,促进行业单位之间交流与合作,展示自身在技术研发、管理创新、生产实践方面等取得成果,现公开广泛征集年会论文。  
          
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