最新刊期
      卷 34 ， 期 11 ， 2014
      • Zhang Yanmin,Wang Haiyan,Luo Jun,Bai Ning,Gan Chunlei,Li Weiwen,Song Kexing
        Vol. 34, Issue 11, Pages: 1123-1126(2014) DOI: 10.15980/j.tzzz.2014.11.001
        摘要：Cu-0.33Cr-0.06 Zr alloy was prepared in the process of solid solution,cold deformation and aged under DC with different current densities.Different DC densities were imposed with aging at 450℃for different time to understand influence of aged time and different current densities on electrical properties of Cu-0.33Cr-0.06 Zr alloy.The morphology of crecipitation phase was observed by means of high resolution transmission electron microscope,and the aging kinetics of the alloy was described.The results show that in contrast with those of the alloy aged without DC,the electric conductivity of the alloy aged with 100A/cm current is the lower,while the alloy aged with 300、400A/cm2 current is the higher than aged one without DC.With 400 A/cm2 DC,the electrical conductivity of alloy with aging for 2hours is increased to 49.5 MS/m,approaching the peak value.Cr and CuZr3 precipitates in the alloy aged can be observed.The Avrami equation of phase transformation kinetics and the electrical conductivity equation are derived through the analysis of the relationship between electrical conductivity and volume fraction of precipitates.  
        关键词：Cu-0.33Cr-0.06Zr Alloy;DC;Current Densities;Aging;Phase Transformation Kinetics E-quation   
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      • Zhao Jianhua,Fu Lu,Wang Zihong,Chen Yanli
        Vol. 34, Issue 11, Pages: 1127-1129(2014) DOI: 10.15980/j.tzzz.2014.11.002
        摘要：Effects of vacuum degree and filling temperature on the casting length of A356 aluminum alloy wire prepared by vacuum suction casting were investigated.The results show that absolute vacuum is directly responsible for the length of A356 aluminum alloy wire.With a given filling temperature,the length of A356 aluminum alloy wire is increased with the decrease of the absolute vacuum.And then,the absolute vacuum is decreased to a certain degree,the increase of the length of the wire is slown down.At a fixed absolute vacuum,the length of the A356 aluminum alloy wire is increased with the increase of the filling temperature.The appropriate parameters were presented as follows:absolute vacuum of 0.0340.047 MPa and the filling temperature of 9931 023 K.Based on Bernoulli equation and principle of heat transfer,theoretical formula for the length of the wire was derived.The length of the wire with the initial filling temperature exhibits logarithmic relation.  
        关键词：Vacuum Suction Casting;A356;Wire;Absolute Vacuum;Filling Temperature   
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      • Vol. 34, Issue 11, Pages: 1126(2014)
        摘要：<正>目前,我国压铸模具市场较为活跃,压铸模具加工制品将会促进经济增长。虽然我国的模具业很早就起步,目前的发展也趋于成熟,但是技术层面还有所欠缺,国内的模具产业与国外相比差距甚大。  
          
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      • Vol. 34, Issue 11, Pages: 1165(2014)
        摘要：<正>2014年10月23日,六丰机械工业有限公司（简称"六丰机械"）与湖北仙桃市签订合作协议,六丰机械铝轮毂项目正式落户仙桃市。六丰机械铝轮毂项目总投资1.2亿美元,一期工程投资6 000万美元,占地面积200亩,投产后可实现年产值5亿元。  
          
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      • Vol. 34, Issue 11, Pages: 1178(2014)
        摘要：<正>2014年9月19日,由中国有色金属工业协会主持的中国有色集团科技成果鉴定会在北京举行。来自北京有色金属研究总院、北京矿冶研究总院等国内知名院所的7位行业专家参加。由中国有色集团牵头完成的《巴鲁巴铜矿复杂难采矿体采矿技术研究及应用》、《铜锌复杂多金属选矿废水零排放技术研究及应用》、《高效低  
          
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      • Vol. 34, Issue 11, Pages: 1191(2014)
        摘要：<正>据国家统计局最新公布的数据显示,2014年9月我国锌精矿产量为51.3万吨（金属量）,为年内迄今次高水平,环比增长4.6%,同比减少0.67%。SMM认为原因有三。一是9月锌价仍维持高位,矿山企业生产积极性较高。  
          
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      • Vol. 34, Issue 11, Pages: 1213(2014)
        摘要：<正>东风日产乘用车公司大连工厂项目一期10月在大连市保税区正式竣工投产。据了解,一期投资50亿元人民币,建成年产能15万辆,首款下线车型为新奇骏,未来主要生产SUV产品。二期建成后年产能将增加到30万辆。  
          
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      • Vol. 34, Issue 11, Pages: 1221(2014)
        摘要：<正>广东鸿图科技股份有限公司（下称"广东鸿图"）2014年10月已与特斯拉签订供应合同并获得产品订单,为后者提供汽车压铸件产品。广东鸿图表示,此次特斯拉订单的产品项目为汽车常用的压铸零部件,虽然此次合作金额较小,但订单的取得将  
          
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      • Vol. 34, Issue 11, Pages: 1129(2014)
        摘要：<正>两年一届的《中国铸造协会精密铸造分会精铸传统工艺第四届高层论坛》于2014年9月19号到21号在湖北武当山隆重举行。由中国铸造协会主办,中国铸造协会精密铸造分会,东风精密铸造有限公司承办,本次会议也得到  
          
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      • Vol. 34, Issue 11, Pages: 1139(2014)
        摘要：<正>2014年9月17日,2014新疆有色金属发展高层论坛会暨第三届西北有色金属高峰论坛在乌鲁木齐举办。新疆有色金属行业协会秘书长季玲表示,有色金属是新疆的优势资源,新疆被国家明确定位为"我国重要的能源  
          
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      • Vol. 34, Issue 11, Pages: 1228(2014)
        摘要：<正>中国铸造协会首届《精铸"产品工艺设计"技能大赛》,与2014年9月1921日在武当山与精铸传统工艺第四届高层论坛同期举行。本次技能竞赛的目的为"以赛促进、互相学习",通过竞赛的形式,加强精密铸造企业之间的相互交流,以促进精密  
          
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      • Vol. 34, Issue 11, Pages: 1234(2014)
        摘要：<正>2014年9月中国铝业电厂管理现场学习观摩座谈会在银川市召开,这是继氧化铝、电解铝、碳素专业向先进企业学习、对标现场观摩会后,电力业务单元的专业性会议,是中国铝业强基瘦身、本质脱困的系列会议之一。中铝公司党组成员、中国铝业总裁罗建川出席会议并讲话。  
          
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      • Bai Hailong,Yan Jikang,Liu Baoquan,LüJinmei,Zhao Lingyan
        Vol. 34, Issue 11, Pages: 1130-1135(2014) DOI: 10.15980/j.tzzz.2014.11.003
        摘要：Fatigue damage behaviors of tin in hot rolling process were investigated based on the plastic forming CAE technology,and fatigue damage distribution of tin foil during first pass of rough rolling was analyzed.Tin foil rolling process was simulated by the finite element analysis software DEFORM-3D,and the optimized experiment scheme was presented through orthogonal experiment.The results show that fatigue damage is accumulated mainly in the slab of tin during first pass of rough rolling.Reduction and rolling velocity are mainly responsible for the fatigue damage.Fatigue damage factor is increased with increasing in rolling reduction and rolling speed.The optimized technological parameters of tin foil during first pass of rough rolling are presented as follows:the reduction of 3.5mm,roller temperature of 60 ℃,rolling temperature of 100℃and rolling speed of 60m/min.Fatigue damage is gradually increased with tin foil rolling and reaches a maximum value at 0.06 s,then no longer changes.  
        关键词：Tin Foil;Rough Rolling;Fatigue Damage;Deform-3D   
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      • Yue Xiangang,Gu Xin,Zou Jianbo,Liu Yan,Li Jianguo,Ma Yue
        Vol. 34, Issue 11, Pages: 1136-1139(2014) DOI: 10.15980/j.tzzz.2014.11.005
        摘要：Influences of the chill-ring surface on the microstructures and stress rupture behavior of the DD6 single crystal superalloy were investigated.Through comparing with the shinning copper surface and the deposit surface of the chill-ring,the heat radiation ability can be enhanced with spraying carbon on the chill-ring surface,and the temperature gradient is improved.As a result,the primary dendrite arm spacing is decreased,and the angle between the single crystal growth orientation and the[001]orientation is decreased.In addition,the size and volume fraction ofγ-γ′eutectic are reduced,and the stress rupture behabior of the DD6 alloy is improve greatly.  
        关键词：Single Crystal Superalloy of DD6;Surface Condition of Chill-Ring;Heat Radiation;Solidifica-tion Microstructure;Stress Property   
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      • Qiu Junyan,Pan Anxia
        Vol. 34, Issue 11, Pages: 1140-1142(2014) DOI: 10.15980/j.tzzz.2014.11.006
        摘要：For the low service life,"flesh out",sticky steel failure in seamless three-roll piercing plug in the early stages,three plug trials with different materials were conducted.By determining rational heating parameters and taking reasonable oxidation programs as well as other measures,the new plug material suitable for the working conditions was presented,and the service life of plug was improved to ensure the quality of the steel and increase production efficiency.  
        关键词：Piercer Plug;Service Life;Failure;Improvement Measures   
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      • Vol. 34, Issue 11, Pages: 1135(2014) DOI: 10.15980/j.tzzz.2014.11.004
        摘要：<正>2014年9月,中国铝合金车轮出口额3.50亿美元,出口量7.10万吨,同比分别增加12.9%,13.1%;出口单价4.93美元/公斤。截至到9月底中国铝合金车轮出口额29.20亿美元,出口量58.86万吨,同比分别增加11.8%,12.4%;出口  
          
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      • Vol. 34, Issue 11, Pages: 1142(2014)
        摘要：<正>日本著名压铸机制造商东芝机械株式会社（下称"东芝机械"）日前宣布,采用新型技术开发的节能型压铸机R系列,已完成量产并开始销售。据介绍,该系列压铸机是应海外生产基地多样化需求而开发的。  
          
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      • Vol. 34, Issue 11, Pages: 1168(2014)
        摘要：<正>不管任何工业金属,要计算出供需状况都相当棘手,但这个问题在铝市场更是难上加难。举例来说,铜、锌、铅和镍市场都有国际研究小组实地走访进行大量的统计工作,但铝市场却没有这类的研究团队。国际铝业协会（IAI）每月公布产量数据,但只针对原铝,供应链中的废铝则未统计。其中最为棘手的问题是,如何评估中国的情况。这  
          
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      • Vol. 34, Issue 11, Pages: 1175(2014)
        摘要：<正>受累库存高企,镍价跌至7个月新低。在镍库存不断攀升下,镍价不再坚挺。10月27日LME镍价创下年内7个月以来的新低。实际上,今年以来,受印尼禁止原矿出口等消息影响,镍价结束此前漫长的低位震荡局面,出现疯涨,并在5月创下年内新高。在大宗商品普跌的情况下,业内将镍价独特牛市行情戏称为"妖镍"。然而,随着镍库存不断增多,国内不锈钢企业受环保压  
          
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      • Yang Guangyao,Wang Zhongjue,Zhu Xiebin,Fang Wenliang
        Vol. 34, Issue 11, Pages: 1143-1146(2014) DOI: 10.15980/j.tzzz.2014.11.007
        摘要：The main contents and using methods of postprocessing and process improvement of simulation design of casting process for the example of applying MAGMA soft and InteCAST were analyzed comparatively.A example was used to verify the correctness about contents and methods,and the solutions for bad process were presented.Eventually,through the available technology of casting process simulation design for obtaining qualified process,optimization process and content,method of optimum processes under production was visualized.  
        关键词：Simulation Design of Casting Process;Postprocessing;Process Improvement;Applied Technology   
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      • Yu Hailong,Shen Minggang,Liu Xiang,Liu Chuwei,Zhang Zhenshan
        Vol. 34, Issue 11, Pages: 1146-1147(2014) DOI: 10.15980/j.tzzz.2014.11.008
        摘要：In order to solve the problem in the poor internal quality of some steel electrode ingot with 450 mm in diameter by constant-velocity pouring,multiple variable speed pouring design with ingot body and riser to a pouring time ratio were implemented.The pouring time was simulated by the ProCAST software.The simulated results reveal that although the solidification time of the optimizted process is longer than the original design,it is helpful for feeding the riser and improving the quality of castings.  
        关键词：Electrode Ingot;Numerical Simulation;Casting Speed;Pouring Time   
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      • Li Zhiyun
        Vol. 34, Issue 11, Pages: 1148-1150(2014) DOI: 10.15980/j.tzzz.2014.11.009
        摘要：Origination of leakage and gas shrinkage in DCT250 gearbox magnetic was described based on the MAGMA software.By optimizing the gating system and overflow system,the defects in the magnetic valve were eliminated,greatly improving the quality.  
        关键词：Aluminium Alloy;Die Casting;Magma Software;Optimization   
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      • Han Fei,Wei Bin,Chen Gang,Wang Zhenyi
        Vol. 34, Issue 11, Pages: 1150-1153(2014) DOI: 10.15980/j.tzzz.2014.11.010
        摘要：Based on the cooling slope method,the semi-solid 7A09 aluminum alloy billets was prepared by the self-designed device.Effects of the pouring temperature,the angle of inclined tube and the rotating speed of straight tube on the microstructure of the billet were analyzed by orthogonal experiment,meanwhile,influence of every experimental parameter on the formation of the billet microstructure was further explored,respectively.The results show that the pouring temperature has the largest effect on the average size and shape factor of the grains,and then the angle of inclined pipe,then the rotating speed of straight pipe.The semi-solid billet with good quality can be prepared at the pouring temperature of approximately 630 ℃,the angle of inclined pipe between 45°and 60°as well as the rotating speed of straight pipe between 70r/min and 100r/min.  
        关键词：Rheological Shearing Method;7A09Aluminum Alloy;Semi-solid Billet;Orthogonal Experi-ment   
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      • Zeng Yidan,Hao Xin,Che Guangdong,Xu Ping
        Vol. 34, Issue 11, Pages: 1154-1158(2014) DOI: 10.15980/j.tzzz.2014.11.011
        摘要：The nucleation behavior of primary phase in semi-solid slurry prepared by melt spreading and mixing technique（MSMT）was analyzed.By determining undercooling degree of melt prepared by MSMT,measuring the distribution elements in primary phase particles with EPMA and the experiment obtained 3Dimages by serial-sectioning technique,formation mechanism of globular primary microstructure under melt spread and mixed condition was discribed.When the melt is cooled below liquidus by processing in making-slurry chamber,heterogeneous nucleation takes place in the liquid alloy to uniformly distribute in the melt and retain in the super-cooled melt to form effective nuclei,and then it is grown into the globular phase.  
        关键词：Melt Spreading and Mixing Technique;Semi-solid Slurry;Nucleation Mechanism;Near-Sphe-roidal Primary Phase   
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      • Wu Yang,Chen Shuying,Zhou Qi,Shao Bingchuan
        Vol. 34, Issue 11, Pages: 1158-1161(2014) DOI: 10.15980/j.tzzz.2014.11.012
        摘要：Effects of mischmetal modification,misch metal plus phosphorus modification and melt superheating treatment on microstructure and properties of in-situ 18Mg2Si/Al composites were investigated.The results show that the primary Mg2 Si in 18Mg2Si/Al composites presents coarse polygonal shapes or dendritic shapes with the average grain size of 65.3μm and uneven distribution in condition of unmodification.After modification treatment,the primary Mg2 Si is refined to some extent,where the size of primary Mg2 Si reaches 15μm after mischmetal plus phosphorus modification,and the eutectic Mg2 Si becomes spheroidization.In addition,the size of primary Mg2 Si reaches 13μm after melt superheating treatment,and the eutectic Mg2 Si exhibits sinewy.After mischmetal modification,misch metal plus phosphorus modification,and melt superheating treatment,the tensile strength and elongation of the insitu composites are improved to some extent.  
        关键词：Misch Metal Modification;Phosphorus Modification;Melt Superheating;Mg2Si;Mechanical Properties   
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      • Liu Zhenyun,Zeng Xiaoshu,Luo Lei,Wu Shengwei,Wei Jiaqi
        Vol. 34, Issue 11, Pages: 1162-1165(2014) DOI: 10.15980/j.tzzz.2014.11.013
        摘要：Nickel hydroxide was deposited on the surface of modified carbon nanotubes（CNTs）by improved precipitation process with nickel sulfate and ammonia as well as CNTs as raw materials,and NiO/CNTs composites were obtained by thermo-decomposition at 450℃.Properties and microstructure of the NiO/CNTs composites with different carbon nanotubes were examined by scanning electron microscopy（SEM）,X-ray diffraction（XRD）and transmission electron microscopy（TEM）.Then NiO/CNTs powder was added to Mg-Zn alloy.The results indicate that nano nickel oxide prepared by homogeneous precipitation method can adhere with carbon nanotubes well.With 33% nickel oxide,carbon nanotubes can be coated by nano nickel oxide uniformly,and the average diameter of nickel oxide particles reaches 20 nm with absence of agglomeration and acceptable disperserdly distrbution.Compared with adding carbon nanotubes directly,carbon nanotubes coated nickel oxide are more easily to be added into magnesium-zinc alloy,which can refine grain size and improve hardness of the composites.  
        关键词：Carbon Nanotubes;Nickel Oxide;Direct Precipitation Method;Mg Alloy   
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      • Wang Xiaoliang,Fu Yunfei,Sun Mingxu,Zhao Peng,Tian Yao,Ma Zehua,Song Yan,Yang Shaobin
        Vol. 34, Issue 11, Pages: 1166-1168(2014) DOI: 10.15980/j.tzzz.2014.11.014
        摘要：In order to improve corrosion resistance of steel in liquid aluminum,Q235 steel was nitrided,and nitriding effect on corrosion resistance of steel in liquid aluminum were examined by measuring corrosive weight loss,observing corrosion structure and analyzing chemical phase.The results show that wettability of nitrided layer exhibits poor to molten aluminum,which can slow down the transition layer peeling and dissolution in liquid aluminum,and make corrosive form from exfoliation corrosion to uniform dissolution,significantly decreasing the corrosion rate of the steel substrate.Nitrided layer completely exist with etching time less than 3hours,which can effectively protect the steel substrate,and improve corrosion resistance of Q235 steel to molten aluminum.  
        关键词：Q235Iron;Nitriding;Liquid Aluminum;Corrosion   
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      • Zhu Shuqing,Long Siyuan,Wang Huifang,Wu Xingyu,Yang Chengzhi
        Vol. 34, Issue 11, Pages: 1169-1172(2014) DOI: 10.15980/j.tzzz.2014.11.015
        摘要：Effects of Sr、Fe and Cu on properties of die casting aluminum alloys were investigated by optical microscope（OM）and scanning electric microscope（SEM）,X-ray diffraction（XRD）and energy dispersive X-ray（EDS）,respectively.The results reveal that Sr exhibits modification effect on die casting aluminum alloys to some extent,however,it takes little increase of strength.When the Fe content reaches 0.8%,needle-likeβ-Fe phase and primaryα-Fe phase can be observed in the microstructure of the alloy.Cu can improve the strength of the aluminum alloys.However,it will reduce the ductility sharply.With a higher Cu content,N-Al7Cu2 Fe and W-Al2Si4Mg5Cu4 can be precipitated from the microstructure of the alloy.  
        关键词：Die Casting Aluminum Alloys;Modification;Needle-likeβ-Fe Phase;Primaryα-Fe Phase   
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      • Tang Quanbo,Du Li
        Vol. 34, Issue 11, Pages: 1173-1175(2014) DOI: 10.15980/j.tzzz.2014.11.016
        摘要：A mould structure with a floating-concave die for squeeing-casting aluminum alloy connecting rod was designed.The mould can be used on conventional press.By the floating motion of the floatingconcave die during the whole squeeing-casting process,the mould has the functions of filling,crystallization,solidification feeding under pressure and plastic deformation.The mechanical properties of aluminum alloy connecting rods manufactured by the mould can be improved greatly with desirable surface quality.  
        关键词：Squeeing-Casting;Mould Design;ADC12Aluminum Alloy;Connecting Rod   
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      • He Qiuyun,Tan Jianfeng,Zhang Yong,Wu Zhichao
        Vol. 34, Issue 11, Pages: 1176-1178(2014) DOI: 10.15980/j.tzzz.2014.11.017
        摘要：Making a mould blank with foam material is a key part of LFC.However,three-axis CNC machining that subjected to the degrees of freedom has been unable to meet the processing needs of the foam model when the foam with very complex needs multi-surface processing.Therefore,multi-degree of freedom of industrial robots was considered to achieve efficient processing and to solve the problem of machining complex shapes.Based on MOTOMAN-HP6 industrial robots parameters and the homogeneous transformation theory,kinetic model of the robot was established to achieve the conversion between the NC code APT language and JBI robot control language.Taking a typical car cover mold for example,the simulation model of MOTOMAN-HP6 robot motion was built up based on UG/modeling environment for improving the efficiency of robots manufacturing by analyzing the pre-simulation result of robot processing.Finally,the experiment of processing the foam model of typical car cover mold was completed with the MOTOMAN industrial robot.  
        关键词：Pattern of LFC;MOTOMAN Industrial Robot;Off-line Programming;Cutting Machining   
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      • Liu Jianyong,Yang Wei
        Vol. 34, Issue 11, Pages: 1179-1181(2014) DOI: 10.15980/j.tzzz.2014.11.018
        摘要：The point cloud of the expendable pattern castings was picked out with the three dimension scanner.Three dimension and two dimension comparison between the castings and the final CAD model was conducted by a computer aided inspection software.The results reveal that there exists cavity dwelling,pattern shift and wall-thickness lass as well as hole position shifting.Based on 3Dinspection,the count-measures were suggested.  
        关键词：Three Dimension Inspection;Expendable Pattern Casting;Analysis of the Casting Process   
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      • Zhang Hongqiang,Wu Mingliang,Wu Mingyong
        Vol. 34, Issue 11, Pages: 1182-1185(2014) DOI: 10.15980/j.tzzz.2014.11.019
        摘要：Traditional mold manually drying system exists some problems such as low control precision in temperature and humidity,resulting in low drying efficiency,poor quality,directly affecting the quality of foam casting.On the basis of analyzing the drying process of the foam pattern,the mold drying control system based on PLC was designed.The design principle of mold drying control,system structure and the program control were expounded.The results show that the system has the advantages of a high automation and reliability,high efficiency and energy-saving,the powerful function of data storage,temperature and humidity control precision and high drying efficiency,greatly improving the staff’s working environment.  
        关键词：PLC;LFC;Drying Room;System Design   
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      • Feng Yiqun,Zhang Keren,Zhang Jie,Hu Chuanming,Sun Xi,Zhang Fengjun
        Vol. 34, Issue 11, Pages: 1185-1187(2014) DOI: 10.15980/j.tzzz.2014.11.020
        摘要：Origination of defects in investment casting aluminum alloy parts based on ProCAST was analyzed.The simulated results reveal that the uneven thickness of the part flange is mainly responsible for the shrinkage porosity（hole）.The shrinkage porosities（holes）can be eliminated through increasing temperature of the mold shell and choosing a reasonable pouring temperature,The experiment indicates that acceptable castings without shrinkage porosities（holes）can be manufactured with pouring at 720℃and mold shell preheat temperature of 400 ℃.  
        关键词：Investment Casting;ProCAST;Shrinkage Porosity;Numerical Simulation   
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      • Lu Gang,Mao Pu,Yan Qingsong,Lu Baiping,Wu Hao
        Vol. 34, Issue 11, Pages: 1188-1191(2014) DOI: 10.15980/j.tzzz.2014.11.021
        摘要：The silica sol slurry with different proportion of short-cut fiber was prepared,and the shell samples were prepared.Effects of fiber addition on the moving viscosity of silica sol slurry,the quality and thickness of moistening slurry were investigated.The results indicate that the movement viscosity of slurry is enhanced by increasing the proportion of fiber,and the movement viscosity is decreased by bimodal distribution.Within a certain range,with increasing in content of fiber,the quality of moistening slurry is increased in an exponential form,and thickness of the shell samples at each direction is increased accordingly.In addition,thickness changes of corner line direction reaches maximum value,and when fiber content is 0.75%,the coating thickness is increased by 0.13 mm.  
        关键词：Short Fiber;Silica Sol;Shell Sample;Movement Viscosity   
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      • Vol. 34, Issue 11, Pages: 1192(2014) DOI: 10.15980/j.tzzz.2014.11.022
        摘要：<正>1制壳机械手简介精密铸造制壳工序现场环境差、劳动强度大、效率低,产品的品质难以控制,对一线操作工人的操作技能要求高。为解决上述问题,经过长期的现场调研,开发出了第一台三（四）臂制壳机械手。三（四）臂制壳机械手具有型壳装卸方便、沾浆、淋砂均匀性好等优点,并能改善操作者的工作环境,减轻了工人的劳动强度,大大提高生产效率。2主要组成部分三（四）臂制壳机械手由机械部分和电气部分组成。机械部分在回转底座上装有3个臂,回转底座可以连续  
          
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      • Wang Hanqing
        Vol. 34, Issue 11, Pages: 1193-1197(2014) DOI: 10.15980/j.tzzz.2014.11.023
        摘要：Suzhou-pasted-wax pattern is a one of presentative technology of Chinese tranditional investment casting.Based on practical trial-production and innovation,combining with art design,the key process of Suzhou-pasted-wax pattern-making process and procedure of internal-external mould——was reproduced.The key technical factors of making internal-external mould were summarized,and making procedure was normalized,which provided a technological support for heritage and development of Suzhou-pasted-wax pattern for producing bronze art castings.  
        关键词：Suzhou-Pasted-Wax Pattern;Internal-External Mould Making;Antique Brone Arts   
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      • Fang He
        Vol. 34, Issue 11, Pages: 1197-1198(2014) DOI: 10.15980/j.tzzz.2014.11.024
        摘要：The design of automobile engine exhibits complex features with the higher quality requirement than other parts.As the key part of engine,the production level of cylinder block and head can directly restrict overall performance of engine.The flexible production process of aluminum alloy cylinder head of engine by the metal mold gravity casting was described,such as the product of the core,core assembling,gravity casting,cooling,shaking sand,riser-removal,shot blasting,rough process,cleaning,which provides a certain reference for the domestic engine manufacture.  
        关键词：Core Product;Metal Mold Gravity Casting;Flexible Processing Line   
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      • Liu Ruiqing,Xie Weibin,Yang Shengli,Fan Xiaowei,Wang Gang
        Vol. 34, Issue 11, Pages: 1199-1201(2014) DOI: 10.15980/j.tzzz.2014.11.025
        摘要：Effects of heat treatment on the electrical conductivity hardness and microstructure evolution of Cu-3.0Ni-0.75Si-0.3Co alloy were investigated,and the strengthening mechanism of the alloy was described.The results show that the amounts of Ni3Si2 and CoSi phase particle in the grain and grain boundary of Cu-3.0Ni-0.75Si-0.3Co alloy are decreased and the super-saturation solid solubility is increased with the increase of the solution temperature by SEM（scanning electron microscopy）observation.As a result of minor second phase particle with smaller sizes in the microstructure,the second phase particles cannot be observed on the SEM pictures by XRD after 950 ℃×1hsolid solution treatment,which reveal that solute elements are sufficiently dissolved into copper matrix.The aging treatment is conducted at different temperatures after 950℃×1hsolid solution treatment and cold rolling of60% deformation ratios.The results show that the electrical conductivity is increased rapidly at firstly and then tends to be flattened with the increase of the aging time.The electrical conductivity is increased continuously with the increase of the aging temperature.And the hardness is increased at firstly and then decreased with the increase of the aging time.And with the increase of ageing temperature,time reaching hardness peak is shortened.The desirable comprehensive properties can be obtained at 950℃×1hsolid solution treatment,60% cold rolling and 450 ℃×6haging treatment,where hardness and electrical conductivity reach 257 HB and 20.18 MS/m,respectively.  
        关键词：Cu-3.0Ni-0.75Si-0.3Co Alloy;Solution Treatment;Aging Treatment   
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      • Zhang Jing
        Vol. 34, Issue 11, Pages: 1202-1204(2014) DOI: 10.15980/j.tzzz.2014.11.026
        摘要：Effects of Ce and heat treatment on the microstructure and properties of ZQSn10-2tin bronze alloy were investigated by OM（optical microscopy）,SEM（scanning electron microscopy）,EDS（energy dispersed spectrometer）and hardness test.The results show that the grain size in the ZQSn10-2alloy is refined and the secondary dendrite arm spacing is decreased with the addition of 0.06% Ce.Additionally,the segregation of Sn is weakened and the hardness is increased slightly.After heat treatment,δphase is dissolved intoα-Cu solid solution,and the grain is transformed into fined equiaxed crystal,meanwhile,the hardness is also increased with the increase of heat treatment temperature.  
        关键词：Tin Bronze Alloy;Rare Earth Ce;Heat Treatment;Microstructure;Hardness   
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      • Wang Huahua,Peng Zi,Jin Guanhua,Li Feng,Zhou Feng
        Vol. 34, Issue 11, Pages: 1205-1206(2014) DOI: 10.15980/j.tzzz.2014.11.027
        摘要：Welding performance of lead-free solders was improved by adding Te.However,Te is not easily added directly in the lead-free solder as a result of easily oxidized in air.Sn-Te master alloy was prepared by ECAP.Tellurium powder and tin powder homogeneously mixed with a given proportion was poured into a uniform extrusion billets with blind hole,and then repeated extrusion by ECAP extrusion technology at low temperature,so tellurium powder can uniformly distribute in the matrix to form SnTe master alloy.  
        关键词：ECAP;Sn-Te;Master Alloys   
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      • Tan Shuilin,Zhou Quan,Wan Hong
        Vol. 34, Issue 11, Pages: 1207-1210(2014) DOI: 10.15980/j.tzzz.2014.11.028
        摘要：Solidified structure,crystal texture and mechanical properties of pure magnesium under DC magnetic field（01.11T）were investigated by digital camera,XRD（X-ray diffraction）,material test machine and SEM（scanning electron microscopy）.The results show that grain size of pure magnesium is increased slightly with the increase of magnetic field intensity.Crystal texture of pure magnesium is directly relative with DC magnetic field.The（0002）plane texture is weakened and the（1010）plane texture is enhanced.The tensile strength of pure magnesium is decreased and its elongation is increased obviously with DC magnetic field treatment.The maximum elongation of pure magnesium is increased by up to 544%,compared with the sample without DC magnetic field treatment.  
        关键词：DC Magnetic Field;Pure Magnesium;Crystal Texture;Solidified Structure;Mechanical Prop-erties   
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      • Liu Weidong,Qu Hua
        Vol. 34, Issue 11, Pages: 1210-1213(2014) DOI: 10.15980/j.tzzz.2014.11.029
        摘要：The transformation temperature of TC4 alloy is 985 ℃ measured by continuous heating metallographic method.Based on the empirical electron theory of solids and molecules,the phase transformation basic theory of titanium alloy and the transformation temperature of pure titanic,a new EET calculation method for the（α+β）/βtransformation temperature of TC4 alloy was put forward after calculating the valence electron structure parameter nA,the crystal cell weight W ofαandβin the constituent phase,the compensation factor Cof the phases and the temperature factor TMcof the stable element.The transformation temperature of TC4 alloy is 974.58 ℃ calculated by the EET calculation method.The relative error between EET calculation value and experimental measure value is only 1.1%.Therefore,it is reliable to calculate the transformation temperature of TC4 alloy based on the valence electron level.  
        关键词：TC4Alloy;Transformation Temperature;Continuous Metallographic;EET Calculation   
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      • Li Zhenliang,Yuan Aiping,Zhang Jing,Wu Lang,Chen Wei,Zhai Jing
        Vol. 34, Issue 11, Pages: 1214-1217(2014) DOI: 10.15980/j.tzzz.2014.11.030
        摘要：The Mg-Al-Zn alloy billets were produced by spraying deposition method,and the extrusion billet exhibits asymmetry in the size.The inhomogeneity of microstructures and properties of extrusion magnesium alloy billets was investigated at height and thickness direction.The results indicate that the hardness value change of the extrusion billet at height direction can be ignored,while hardness at thickness direction presents the rule of smaller intermediate layer,larger inner and outer layers.Non-uniform plastic deformation of deposition billet in the process of extrusion plays a key role in affecting the inhomogeneity of microstructures and performance of extrusion billet.  
        关键词：Spraying Deposition;Magnesium Alloy;Hot Extrusion;Inhomogeneity;Microstructure and Properties   
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      • Zhu Shenliang,Dong Hongbo,Zhang Guihua,Liu Cheng,Yu Xinping
        Vol. 34, Issue 11, Pages: 1217-1221(2014) DOI: 10.15980/j.tzzz.2014.11.031
        摘要：Superplastic tensile test was carried out to understand the deformation of TC21 titanium alloys at 1 1531 193 Kand strain rate of 0.0330.000 33s-1.The superplastic tensile deformation activation energy and corresponding stress exponent were calculated.Based on the calculation results,the constitutive equations of strain rate and flow stress was deduced,and it was modified by the software of1 stopt.The results show that the flow stress is decreased with the increase of deformation temperature at a constant strain rate,and it is increased with the increase of strain rate at a constant temperature.With a higher strain rate and a lower deformation temperature,the main softening mechanism of TC21 titanium alloys is characterized by dynamic recrystallization,on the contrary,the main softening mechanism is characterized by dynamic recovery. TC21 titanium exhibits accepatable superplasticity（408.60%）at 1 153 Kand 0.000 33s-1.The superplastic deformation activation energy and the corresponding stress exponent are 329.20kJ/mol and 2.3677,respectively.  
        关键词：TC21Titanium Alloys;Constitutive Equations;Superplastic Deformation;Flow Stress   
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      • Lu Yufa
        Vol. 34, Issue 11, Pages: 1222-1224(2014) DOI: 10.15980/j.tzzz.2014.11.032
        摘要：Through analyzing the corrosion behavior of die cast AZ91 Dalloy in 3.5% NaCl solution,Na2SO4 solution and MgSO4 solution,effects of SO42-on corrosion behavior of die cast AZ91 Dalloy were investigated.The results show that Mg（OH）2and Mg6Al2（OH）18·5H2O phase are the corrosion product of die casting AZ91 Dalloy in solution.Corrosion rate of die casting AZ91 alloy in three different solutions from high to low is presented as follows:NaCl>MgSO4>Na2SO4.In addition,die casting AZ91 alloy exhibits pitting corrosion in NaCl solution,while it is characterized by uniform corrosion in Na2SO4 solution and in MgSO4 solution.  
        关键词：Die Casting AZ91DAlloy;Corrosion Rate;Morphology;Polarization Curve   
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      • Li Sisi,Xu Zhifeng,Zhang Yongcai,Liu Chunxia,Xie Yunlong,Zhao Kaifa
        Vol. 34, Issue 11, Pages: 1225-1228(2014) DOI: 10.15980/j.tzzz.2014.11.033
        摘要：Based on the developed 140/270 mesh SLS coated sand,through selecting carbon powder,pyrite and boric acid with particle mesh size≤150as flame retardant,coated sand materials were designed and prepared with tripropellant composite flame retardant.By the laser sintering forming,green strength is 0.58 MPa,and post-processing strength reaches 2.34 MPa with gas release of 9.7g/mL.A coated sand mold prepared by the modified coated sand was used for pouring ZM2 magnesium alloy.And the surface qualified magnesium alloy parts were produced successfully wit tensile strength of 172 MPa and elongation of 4%.Finally,by using the SLS coated sand mold（core）with flame retardants,the high-quality magnesium alloy castings were produced.  
        关键词：ZM2Magnesium Alloy;SLS Coated Sand Mold（Core）;Flame Retardant;Mechanical Proper-ties   
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      • Guo Yaju
        Vol. 34, Issue 11, Pages: 1229-1232(2014) DOI: 10.15980/j.tzzz.2014.11.034
        摘要：By means of X ray diffraction（XRD）,optical microscope（OM）,micro hardness tester,wear tester and electrochemical measurement system,effects of laser cladding composite coating on the microstructure,microhardness,wear resistance and corrosion resistance of magnesium matrix were investigated.The results show that,after laser surface modification,the surface hardness,wear resistance and corrosion resistance of AZ31 magnesium alloy are greatly improved,and with the mass ratio of Al-Si+Al2O3、TiO2of 6∶1,the desirable comprehensive properties can be presented.  
        关键词：Sports Equipment;AZ31Magnesium Alloy;Laser Cladding;Wear Resistance;Corrosion Re-sistance   
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      • Zhou Yongjiang,Li Shasha,Hong Runzhou,Zhang Zhe
        Vol. 34, Issue 11, Pages: 1232-1234(2014) DOI: 10.15980/j.tzzz.2014.11.035
        摘要：Effects of Fe element on fatigue behaviors of ZL114 Aalloy were investigated.The fatigue limit of ZL114 Aalloy with low Fe content（0.07%）and high Fe content（0.5%）was tested,and the fracture morphology was observed.The results show that the fatigue limit of alloy with high Fe content（0.5%）is 15%lower than that of the alloy with low Fe content（0.07%）.When the Fe content is 0.07%,there exists much cleavage plane in fracture morphology under high axial stress,and it is characterized by crack initiation,crack propagation and abruptness fracture area in the fracture morphology under lower axial stress,while the Fe content is 0.5%,it is characterized by much cleavage plane in the fracture morphology under either high or low axial stress.  
        关键词：ZL114AAlloy;Fatigue;Fe Content   
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      • Vol. 34, Issue 11, Pages: 1204(2014)
        摘要：<正>1.职位熔化炉项目主任工程师2.任职要求（1）学历:本科以上学历,热能与动力工程、机械工程及自动化等相关专业。（2）经验:有色金属冶金、铸造和热处理行业五年以上工作经验,熟悉连续熔化炉和保温炉等各种热工设备,具有较丰富的设计经验和技术方案编写能力。  
          
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      • Vol. 34, Issue 11, Pages: 1235(2014) DOI: 10.15980/j.tzzz.2014.11.036
        摘要：<正>20141101 Lee C D.T6处理对低压铸造A356铝合金疲劳性能随缺陷变化的敏感性的影响.Materials Science and Engineering,2013,A59:496-505.传统铸造工艺制备的A356铝合金铸件往往存在不可避免的微观缩孔等缺陷,严重恶化合金的疲劳性能。对T6热处理低压铸造A356铝合金疲劳性能随缺陷变化的敏感性进行了系统  
          
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      • Vol. 34, Issue 11, Pages: 1236(2014) DOI: 10.15980/j.tzzz.2014.11.037
        摘要：<正>20141101一种多用的中间罐倾翻装置,CN203371031U,2014.01.01,广东韶钢松山股份有限公司.本实用新型涉及一种多用的中间罐倾翻装置,具有倾翻框架、移动框架、中梁、平台、定位板、定位销、定位装置、液压马达、斜楔、液压缸、限位开关装配和液压系统,移动框架套装在  
          
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