最新刊期
      卷 34 ， 期 2 ， 2014
      • Cai Bin,Li Weijie,Zhou Weiwei,Li Jinwen,Li Zhihua,Li Weihua
        Vol. 34, Issue 2, Pages: 113-115(2014) DOI: 10.15980/j.tzzz.2014.02.012
        摘要：Based on previous work,the creep behavior of Al-0.2Sc-0.04Zr alloys at 300℃after different cold-rolling and ageing treatments was investigated.It is found that the creep behavior of Al-0.2Sc-0.04Zr alloys belongs to the creep behavior of the secondary phase precipitate-strengthening materials,meanwhile,the threshold stress exists during creep,furthermore,the combination treatment of cold-rolling and ageing can increase the high temperature creep resistance.Although a better tensile strength can be obtained by pre-ageing+cold-rolling+re-ageing for the alloy,much better creep resistance at high temperature can be obtained by cold-rolling+ageing for the alloy.Microstructure observation reveals that the improvement of creep resistance of Al-0.2Sc-0.04Zr alloys at high temperature is relevant with the grain refinement,the formation and distribution of coherent Al3（Sc,Zr）precipitates.  
        关键词：Al-Sc-Zr Alloys;Creep;Threshold Stress   
        2
        |
        173
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130549 false
        发布时间：2023-12-18
      • Chen Shuying,Yang Hongming,Li Huicheng,Wu Yang
        Vol. 34, Issue 2, Pages: 116-120(2014) DOI: 10.15980/j.tzzz.2014.02.013
        摘要：AZ31B magnesium alloy ingots were prepared by spraying water towards the bottom ingot and holding at side face of the ingot using a heating-furnace.The solidification structure of magnesium alloy was modified through changing the melt superheating temperature,and effects of grain size and shape on ambient mechanical properties of AZ31B magnesium alloy were analyzed.The results show that the columnar crystals are generated at the bottom and the equiaxed crystal is at other location of ingot prepared using the method.Meanwhile,the structure exhibits dense with absence of shrinkage porosities（holes）.With melt superheating temperature increased from 720℃to 900℃,the length and spacing of columnar crystals are decreased from 0.8mm to 0.1mm,and from 0.7mm to 0.2mm,respectively.The equiaxed crystal size is decreased from 0.8mm to 0.1mm at 130mm position apart from the ingot bottom.The ambient tensile strength and plasticity are improved with decreasing in the equiaxed crystal size,especially for the plasticity.When the tension direction is perpendicular to the axial direction of columnar crystals,the tensile strength and elongation of the samples are obviously decreased compared with the equiaxed crystal.The ambient compression properties of magnesium alloy are increased with the decrease of the columnar crystal spacing.Under the same columnar crystal spacing conditions,the compression properties of perpendicular to columnar crystal axial direction are better than that of parallel to columnar crystal axial direction.  
        关键词：Magnesium Alloy;Equiaxed Crystal;Columnar Crystals;Mechanical Properties   
        2
        |
        122
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130926 false
        发布时间：2023-12-18
      • Wang De,Zhou Cheng,Xu Guojin,Luo Junjie
        Vol. 34, Issue 2, Pages: 120-124(2014) DOI: 10.15980/j.tzzz.2014.02.014
        摘要：Aiming at the poor surface conditions of the strips produced by single-roll casting and a slower speed and limited applicable alloys in conventional twin-roll casting,a new method of top side-pouring twin-roll casting process was proposed to overcome those disadvantages.Al-10Cu alloy strip with 100mm in width and 1.7～2.0mm in thickness as well as several meters long was produced successfully,and the casting speed could reach up to 60m/min.The surface quality and microstructure of the Al-10Cu strip produced were observed by OM（optical microscope）,SEM（scanning electron microscope）.The results show that the top side-pouring twin roll casting process can produce those alloys strips which cannot be produced by conventional twin roll casting,and the profile and surfaces of the strip exhibit desirable with ignorable defects,and the microstructure is fine and homogeneous with absence of observable segregation.In order to understand the behavior of the molten metal during casting,a numerical simulation was conducted using the ANSYS Fluent,and the results verified the experimental ones.  
        关键词：Top Side-Pouring Twin-Roll Casting;Al-10Cu Alloy;Thin Strip;Surface Conditions   
        2
        |
        109
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46128605 false
        发布时间：2023-12-18
      • Yan Hong,Li Zhenghua,Huang Xin
        Vol. 34, Issue 2, Pages: 125-127(2014) DOI: 10.15980/j.tzzz.2014.02.015
        摘要：In order to obtain the rare earth aluminum alloy with desirable mechanical properties,the effects of different melting parameters on the mechanical properties of rare earth aluminum alloy were analyzed by orthogonal testing.The experiment results show that with La of 0.3%and pouring temperature of 660℃as well as modification at 660℃for 160min,tensile strength,elongation and hardness of the alloy reach 215.6MPa,4.7%,100.8HB,respectively.  
        关键词：Aluminum Alloy;Orthogonal Experiment;Rare-Earth La;Melting Technology   
        2
        |
        378
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46129051 false
        发布时间：2023-12-18
      • Wang Songtao,Liu Honghui,Dong Ruihua,Song Xingwu,Jiang Yanliang
        Vol. 34, Issue 2, Pages: 128-132(2014) DOI: 10.15980/j.tzzz.2014.02.016
        摘要：Large-size Mg-10Gd-4.8Y-0.6Zr ingots were produced by semi-continuous casting,and it was extruded after homogenization treatment,and then treated by artificial aging.The tested results reveal that peak aged Mg alloy exhibits a maximum tensile strength of 460 MPa,maximum yield strength of410MPa with an elongation of 5%.The alloy was observed with the help of optical microscope,scanning electron microscopy（SEM）and high resolution electron diffraction（HRTEM）.The results show that the grain size of the extruded alloy is decreased from 60μm for homogenization treatment to below20μm,and refining effects are improved increasingly with increasing in squeezing ratio.Amounts of β′ phase can be observed in the peak aged alloy,which obviously restrains the dislocation movement,greatly improving the strength of the alloy.  
        关键词：Mg Alloy;Semi-continuous Casting;Microstructures;Grain Refinement;Precipitation   
        2
        |
        150
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46128123 false
        发布时间：2023-12-18
      • Zhang Zhongcheng,Zhang Fengxia,Wang Zhongmin,Zhang Huimin,Liu Ning,Liu Yu
        Vol. 34, Issue 2, Pages: 132-134(2014) DOI: 10.15980/j.tzzz.2014.02.017
        摘要：Corrosion resistantance and mechanical properties of ZGCr29Ni9Mo4Nhigh-strength steel and ZG07Cr19Ni9（SUS 304）γstainless steel used for industrial pump were investigated comparatively with help of using salt spray test machine,electrode potential monitor and metallographic microscope.The results show that the mechanical properties and corrosion resistance of ZGCr29Ni9Mo4Nhigh-strength steel are superior greatly to those of SUS 304stainless steel,where the hardness,yield strength and corrosion resistance are increased by one time,more than two times and approximately 98%,respectively.  
        关键词：Industrial Pump;ZGCr29Ni9Mo4NHigh Strength Steel;Corrosion Resistant;Strength   
        2
        |
        73
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46129654 false
        发布时间：2023-12-18
      • Ma Yong,Zhao Yapei,Peng Cheng,Gui Wei
        Vol. 34, Issue 2, Pages: 135-139(2014) DOI: 10.15980/j.tzzz.2014.02.018
        摘要：The equal channel angular pressing （ECAP） for 7075aluminum alloy was simulated with different friction factors using the finite element software DEFORM-3D.The pressing load,deformation rate as well as effective stress and strain distribution were analyzed,and the change of microstructure of7075aluminum alloy during ECAP was predicted using the dynamic recrystallization model.The results show that,with the increase of the friction factor,the peak load is significantly increased and even grow exponentially accompanying with the sharp fluctuation of load.Besides,the"end effect"of sample is weakened and the effective stress and strain distribution exhibit uneven.The grains of the stable deformation zone in the central of sample are constantly refined with the extrusion passes increases,and the fine grain area is generated in the sample contact with the channel.In addition,the grains of the stable deformation zone with frictional coeffiaent of 0.4are finer than those with 0.1after four passes extrusion.  
        关键词：7075Aluminum Alloy;Equal Channel Angular Pressing （ECAP）;Friction Factor;Deformation and Microstructure   
        2
        |
        186
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46132177 false
        发布时间：2023-12-18
      • Xu Biao,Wan Bin,Xin Feng,Liu Yao,Zhan Lila
        Vol. 34, Issue 2, Pages: 140-142(2014) DOI: 10.15980/j.tzzz.2014.02.009
        摘要：Based on vacuum high frequency induction furnace spray casting technology,Cr3C2particle reinforced Cu-0.5Cr-0.2Zr-0.02Ycomposites were prepared through liquid phase Cr reaction with graphite C in graphite crucible.The microstructure,mechanical and electrical properties of the composites prepared were analyzed.The results show that through rolling and aging treatment,microstructure of the composites is characterized by equiaxedα-Cu phase matrix,while after 90%cold deformation and aging treatment for 45minutes,micro-hardness and electric conductivity of the composites reach HV182.7 and 48.4MS/m.  
        关键词：Cr3C2/Cu Composites;In-Situ Synthesized;Spray-casting;Microstructure;Properties   
        2
        |
        55
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130353 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 124(2014) DOI: 10.15980/j.tzzz.2014.02.001
        摘要：<正>以"转型升级的智慧与行动"为主题,以"创新、责任、影响力、推动力、年度主题贡献度"为评选标准的"2013中国经济年度人物评选颁奖盛典"2013年12月12日在北京举行。中国铸造协会副理事长、新兴际华集团有限公司董事长刘明忠被评为"2013中国经济年度人物"。  
          
        2
        |
        37
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130418 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 134(2014) DOI: 10.15980/j.tzzz.2014.02.002
        摘要：<正>日前中联钢统计,中国7大港口库存镍矿量在1700万吨,除去京唐港200万吨低镍高铁矿,也还有1500万吨,再加上其他小港口和江内港口,总的港口库存量应该在1900万吨上下。  
          
        2
        |
        36
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46128658 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 139(2014)
        摘要：<正>在皋兰县黑石川乡的兰州新区循环经济产业园区内,西北地区规模最大的铸造产业聚集地——"兰州市铸造工业园区"项目奠基,这也标志着兰州市主城区铸造企业出城入园搬迁改造工程开工。87家铸造企业的整体搬迁,意味着兰州市"十二五"企业出城入园搬迁改造规划迈出了实质性一步,这也是兰州大气污染综合治理中工业污染治理的重要一环。  
          
        2
        |
        46
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130404 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 142(2014) DOI: 10.15980/j.tzzz.2014.02.003
        摘要：<正>"第二十届何梁何利基金科学与技术奖颁奖大会"于2013年10月30日在北京钓鱼台国宾馆举行。中国铸造协会副理事长、宁夏共享集团董事长彭凡等46位国内科技界杰出人才获得该奖项。  
          
        2
        |
        31
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46129625 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 145(2014)
        摘要：<正>为焊接、铸造等领域提供系统解决方案的机器人企业——长沙长泰机器人有限公司,将携最新研发的"铸铁件清理机器人",首次亮相2014中国国际机器人展览会。今年,即将在CIROS2014亮相的长泰"铸铁件清理机器人",将解决铸造行业恶劣环境下工人工  
          
        2
        |
        77
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130854 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 152(2014) DOI: 10.15980/j.tzzz.2014.02.004
        摘要：<正>为进一步做好化解电解铝产能过剩工作,同时发挥新疆资源优势,促进优势产业持续健康有序发展,2014年1月13～17日,工信部原材料工业司司长陈燕海、副司长骆铁军行到新疆调研电解铝行业发展情况。在疆期间,调研组先后考察了新疆神火煤电有限公司、新疆其亚铝电有限公司、新疆天龙矿业股份有限公司、新疆东方希望金属有限公司、新疆嘉润资源控股有限公司、新疆农六师煤电有限公司、新疆生产建设兵团农八师天山铝业有限公司、新疆众和股份有限公司等企业,深入了解了企业电解铝产能、在建项目、供电、供水、原材料、交通运输、人力资源、生产成本及经营等情况,听取了新疆经信委关于电解铝行业发展情况的汇报,并与新疆经信委有关同志就化解产能过剩、支持新疆优势产业有序发展等  
          
        2
        |
        56
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130088 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 157(2014) DOI: 10.15980/j.tzzz.2014.02.005
        摘要：<正>2013年11月26日,作为国家开放大学首批试点建设的10个行业学院之一,国家开放大学铸造学院在北京正式挂牌成立。该学院建设目标是:通过试点实践和相关课题研究,探索以提升职业能力为核心的非学历继续教育和学历继续教育相融  
          
        2
        |
        32
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46129487 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 197(2014) DOI: 10.15980/j.tzzz.2014.02.007
        摘要：<正>由中国铸造协会组织编撰的第五版《中国铸造年鉴》（2012版）于2013年成功面世。该年鉴旨在全方位汇集我国铸造业发展状况的历史性资料,具有权威性、实用性、可读性、服务性,同时还具有重要的参考和收藏价值。年鉴自出版后,受到了各级  
          
        2
        |
        50
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46129849 false
        发布时间：2023-12-18
      • Hu Ningbo,Liu Yaowei,Jia Zhixin
        Vol. 34, Issue 2, Pages: 143-145(2014) DOI: 10.15980/j.tzzz.2014.02.019
        摘要：In order to solve the problem of model modification and mesh generation in ProCAST software,all possible interface mode were discussed between HyperMesh software and ProCAST.Taking an die casting as an example,high quality 2D、3Dgrid of HyperMesh was input into ProCAST successfully,and problem of difficult to be meshed of large,complex castings model in the ProCAST software was solved.The results indicate that it is an effective way of meshing in HyperMesh at first and then inputing into ProCAST for postprocessing,greatly saving time and improving accuracy and speed.  
        关键词：ProCAST;HyperMesh;Interface Mode;Grid Meshment   
        2
        |
        273
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46132292 false
        发布时间：2023-12-18
      • Yao Jianzhong,Duan Wangchun,Liu Junzhao,Zhang Zibin,Zhang Yaxiang
        Vol. 34, Issue 2, Pages: 146-149(2014) DOI: 10.15980/j.tzzz.2014.02.040
        摘要：Based on SolidWorks software combining with the Fluent software,the temperature and velocity distribution in process of horizontally continuously casting brittle Co-Cr-W alloy wire were simulated with different casting speeds,and effects of casting speed on wall-thickness of solidified shell and internal solute diffusion were analyzed.Meanwhile,Co-Cr-W wire was trial-produced to verify the simulated feasibility.The results show that with casting speed of 1.5m/min,the effective thickness of solidification shell can be formed and the energy can be consumed completely.The simulation results are well in agreement with practical ones.  
        关键词：Numerical Simulation;Casting Speed;Temperature Distribution;Velocity Distribution   
        2
        |
        71
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46129255 false
        发布时间：2023-12-18
      • Yang Wei,Zhao Junxue,Song Shuya,Qiu Shengtao
        Vol. 34, Issue 2, Pages: 149-152(2014) DOI: 10.15980/j.tzzz.2014.02.020
        摘要：The filling and solidification processes of a 25t steel ingot from a special steel plant were simulated by CAE software,and the numerical simulation results were compared with measured data from the practical production,and the feasibility of the model was verified.Solidification process of large steel ingot and the distribution of temperature field were analyzed.And the potential defects locations were forecast in the ingot.The results reveal that the larger riser size is helpful for the feeding,and macroshrinkage cavity is absent,however,shrinkage porosities along the axial can be observed.Through decreasing riser size and using stirring process in the subsequent process,central segregation can be eliminated to improve the quality of steel ingot.Based on the solidification time from simulation,the molddrawing time can be set 6.4 hours in advance after pouring steel ingot.  
        关键词：Large Steel Ingot;Numerical Simulation;Filling;Solidification;Temperature Field   
        2
        |
        290
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46129187 false
        发布时间：2023-12-18
      • Ma Zhuang,Wang Yiwei,Zhang Li,Fu Shuanshuan,Li Zhichao
        Vol. 34, Issue 2, Pages: 153-157(2014) DOI: 10.15980/j.tzzz.2014.02.010
        摘要：The preparation technologies such as stirring casting,squeeze casting,powder metallurgy,suspension casting and spray deposition were briefly reviewed for fly ash particle reinforced Al matrix composites.Some excellent properties including density,hardness,tensile strength and elongation,wear resistance and damping behavior were paid attention.The future of fly ash particle reinforced aluminum matrix composite was presented.  
        关键词：Fly Ash;Aluminum Matrix Composites;Preparation Technologies;Properties   
        2
        |
        386
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46127711 false
        发布时间：2023-12-18
      • Guo Hui,Chen Tijun,Xu Haiduo,Zhang Suqing,Zhang Jinyu
        Vol. 34, Issue 2, Pages: 158-162(2014) DOI: 10.15980/j.tzzz.2014.02.021
        摘要：Effects of pressure and punching head speed on microstructure and mechanical properties of thixoformed AZ63H magnesium alloy were investigated.The results indicate that with increasing in pressure,the grain size AZ63 Halloy is increased firstly and then decreased,and the tensile strength is increased firstly and then decreased,where the maximum value can be obtained with 140 MPa.With the increase of the punching head speed,the microstructure compactness is enhanced as result of the improvements of mold-filling capacity and feeding ability,resulting in the increase of mechanical properties.However,when the punching head speed is more than 140 mm/s,the number and the size of the pores are increased,which is harmful for the mechanical properties.In view of the microstructure compactness and mechanical properties,the optimized thixoformed process of AZ63H magnesium is presented as follows:apunching head speed of 140 mm/s and a pressure of 140 MPa.  
        关键词：AZ63H Magnesium Alloy;Thixoforming;Microstructure;Mechanical Properties   
        2
        |
        116
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46127912 false
        发布时间：2023-12-18
      • Gao Zhihua,Xu Jun,Zhang Zhifeng,Tang Meng′ou,Liu Guojun
        Vol. 34, Issue 2, Pages: 163-166(2014) DOI: 10.15980/j.tzzz.2014.02.022
        摘要：Effects of non-electromagnetic stirring（N-EMS）、conventional electromagnetic stirring（EMS）and annular electromagnetic stirring（A-EMS）preparation process on homogenization treatment time of 7075 aluminium alloy were investigated.The results indicate that,compared with N-EMS and EMS,the A-EMS process exhibits superior grain refinement ability.The microstructures of 7075 aluminum alloy were observed at different preparation methods after different homogenization heat treatment time.The results reveal that A-EMS preparation process can decrease the time of homogenization treatment obviously.The changes of alloy hardness and electrical conductivity after different homogenization treatment also proved the result.  
        关键词：7075Aluminium Alloy;Annular Electromagnetic Stirring;Homogenization Treatment   
        2
        |
        156
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46131699 false
        发布时间：2023-12-18
      • Wu Longbiao,Wang Jia,Xiao Han,Lu Dehong,Zhou Rongfeng,Zhou Rong
        Vol. 34, Issue 2, Pages: 167-170(2014) DOI: 10.15980/j.tzzz.2014.02.023
        摘要：Semi-solid ZCuSn10 copper alloy billets were fabricated by strain induced melt activated method such as upsetting,forging stretching,cold rolling pre-deformation methods.The microstructure of semi-solid ZCuSn10 copper alloy billets prepared by three different pre-deformation methods was observed during remelting process.The results indicate that the semi-solid microstructure prepared by forging stretching and cold rolling exhibits desirable uniformity and spheroidization degree with an average grain size between 40～70 μm with remelting at 900 ℃for 15 min.The liquid deposition rate and spheroidization velocity of semi-solid billet prepared by forging stretching is faster,and the grain diameter of semi-solid billet prepared by cold-rolling is small.  
        关键词：ZCuSn10 Copper Alloy;SIMA;Pre-Deformation;Semi-Solid;Microstructure   
        2
        |
        142
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46127835 false
        发布时间：2023-12-18
      • Fan Xiang,Yang Yitao
        Vol. 34, Issue 2, Pages: 171-175(2014) DOI: 10.15980/j.tzzz.2014.02.024
        摘要：Hypereutectic Al-Si alloy semi-solid billet was prepared based on continuous casting and secondary induction heating technology,and then it was formed by die casting.The microstructure and properties of the samples prepared were analyzed,and T6 heat treatment was conducted based on optimizing parameters to understand effects on microstructure and properties of the semi-solid samples.The results reveal that compared with those of hypereutectic Al-Si alloy,hardness,tensile strength and elongation of semi-solid die casting hypereutectic alloy are increased by 24%,24% and by 70%,respectively,while wear rate is decreased by 11%.  
        关键词：Semi-Solid Die-Casting;Hypereutectic Aluminium-Silicon Alloy;Heat Treatment   
        2
        |
        222
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46128684 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 170(2014)
        摘要：<正>加拿大铝业协会（ACC）新研究表明,在加拿大东部地区和美国,用铝材代替钢材修复废旧桥梁已经成为趋势。该研究表明,北美地区共有超过6.59万座道路桥梁,其中大部分建于1945～1975年,部分桥梁已出现不稳固等现象。其中,仅魁北克省方圆1000公里内的1000～1400个跨度较小的桥中,有半在未来十年之内要修复,该协会建议可以使用铝材料进行修复。  
          
        2
        |
        19
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46131049 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 204(2014) DOI: 10.15980/j.tzzz.2014.02.008
        摘要：<正>日本文部科学省和经济产业省于2013年9月1日启动了运用超型计算机"京"从国内能够稳定采的天然资源中发与土类金属同样性能的新材料项目。项目计划用8年时间实现实用化,每年投资约150亿日元,受文部省委托的东大、京大、东工大等共计2500科研人员参与研发。这是日本首次在国内研发土类金属的替代材料。  
          
        2
        |
        36
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46131675 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 224(2014)
        摘要：<正>美国铝业公司（Alcoa）于近日宣布爱荷华州Davenport工厂完成了3亿美元的扩建计划,该工厂主要为汽车行业提供铝板材。Alcoa在纽约证券交易所上市,公司高管在2014美国底特律车展（2014NorthAmericanInternationalAutoShow,NAIAS）上公布了以上信息。展会上展出的众多车辆中铝产品的含量提高了不少。Alcoa称,据汽车制造商提供的消息显示到2025年汽车用铝需求将翻倍,铝已经成为当今汽车制造中的第二大材料。2015  
          
        2
        |
        20
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130112 false
        发布时间：2023-12-18
      • Song Lei,Shao Ming,Xiao Bo,Huang Linyong
        Vol. 34, Issue 2, Pages: 175-177(2014) DOI: 10.15980/j.tzzz.2014.02.025
        摘要：A squeeze casting comprehensive monitoring system was developed for KDJ-2500 kN squeeze casting machine,which is capable of measuring clamping force,injection pressure,movement parameters and die cavity pressure.The various function of the system developed was verified by the experimental production.Processing parameters were observed based on the tested data.  
        关键词：Squeeze Casting;Technological Parameter;Monitoring System   
        2
        |
        109
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46131069 false
        发布时间：2023-12-18
      • Zhu Nan,Ding Lin
        Vol. 34, Issue 2, Pages: 178-180(2014) DOI: 10.15980/j.tzzz.2014.02.026
        摘要：Based on the analysis of configuration,dimension and process ability of shell assembly structure,the DCC400 die press was adopted,and the parting surface was set at the outer surface.In corepulling mechanism,four groups of oblique guide pillar driving the angle-lift splits were considered to realize the open-mould ways of drawing-core before pull-out,and the position and installation of the three inlay pieces in the mould were determined.Because of the size of the parts inside the cavity of 55 mm larger than mouth size of 45.6 mm,movable slide block demoulding was adopted to push out the part with the ejector pins.Through determining the location of the mold parts according to the parting surface,the mold structure and the assembly relationship of each parts were determined.  
        关键词：Die-Casting;Parting Surface;Core-Pulling;Ejection   
        2
        |
        160
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46128937 false
        发布时间：2023-12-18
      • Zhang Hongren,Wu Huafeng
        Vol. 34, Issue 2, Pages: 180-182(2014) DOI: 10.15980/j.tzzz.2014.02.027
        摘要：To improve low pressure casting process for producing pressure-resistant aluminum alloy housing for high voltage switch,core-heart pouring with metallic mould sand core was adopted.Numerical simulation was conducted,and practical production obtained successful effects.  
        关键词：High Voltage Switch;Aluminum Alloy Housing;Low Pressure Casting;Gating System   
        2
        |
        119
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130461 false
        发布时间：2023-12-18
      • Zhang Bo,Wang Jianmei,Huang Yuqin,Cai Min
        Vol. 34, Issue 2, Pages: 183-187(2014) DOI: 10.15980/j.tzzz.2014.02.028
        摘要：The temperature field and stress field of Babbitt layer on oil-film bearing bushing during the centrifugal casting solidification process were simulated by using ANSYS software,and effects of different pouring temperatures and mold preheating temperatures on the solidification process were analyzed.The results show that with increasing in pouring temperature of liquid metal and the mold preheating temperature,the solidification rate of liquid metal is decreased and thermal stress generated inside the mold is increased.The more the place is close to the alloy layer,the greater the stress is.With the increase of the mold temperature,the cooling ability of mold is decreased.The mold temperature has greater effect than the pouring temperature on solidification process during the centrifugal casting.The optimum parameters were analyzed.The simulation results are well agreement with the actual production.  
        关键词：Centrifugal Casting;Oil-film Bearing;ANSYS;Numerical Simulation   
        2
        |
        170
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46127759 false
        发布时间：2023-12-18
      • Sun Biao,Xia Yuanji
        Vol. 34, Issue 2, Pages: 187-190(2014) DOI: 10.15980/j.tzzz.2014.02.029
        摘要：The filling and solidification process of bronze bell in sand casting was simulated based on the ProCAST software,and casting defects were predicted.The origination was analyzed.Based on the above simulation,through improving the design of gating system,the defects in the important part of bronze bell were effectively reduced to realize the optimization of the process,and the quality of the product was improved too.  
        关键词：ProCAST;Numerical Simulation;Bronze Bell;Process Optimization   
        2
        |
        187
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46132240 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 190(2014) DOI: 10.15980/j.tzzz.2014.02.006
        摘要：<正>2013中国铸造协会汽车铸件分会第六届年会暨汽车轻量化铸造技术研讨会,于10月11日～13日在长春召。本次年会得到中国铸造协会、汽科协的大力支持,全国各地近200名专业技术人员,73家铸造及材料企业参会。会议由汽铸造有限公司、吉林省铸造协会、吉林省铸造学会承办,苏州兴业铸造材料有限公司、北京瑞泓翔宏大科技发展有限公司、济南圣泉集团股份有限公司、巴彦淖尔  
          
        2
        |
        35
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130072 false
        发布时间：2023-12-18
      • Wang Yongming,Huang Aihua,Zhang Jianguo,Zhu Shizhe,Cui Shusen
        Vol. 34, Issue 2, Pages: 191-193(2014) DOI: 10.15980/j.tzzz.2014.02.030
        摘要：Through adjusting gating-riser system,pre-heating temperature of mold shell,holding ways of mold shell and pouring temperature of thinned-slender grain-fined blade for low pressure turbine,effects of processing parameters and gating-riser system on cold-shut,misrun,grain size and shrinkage porosity in the alloy blades were analzyed.The results reveal that with pre-heating temperature of mold shell more than 1 150 ℃,gain size in the blades becomes coarse,while pre-heating temperature of 1100℃and pouring temperature of 1 450 ℃,misrun and cold shut defects in the blades can be often observed.With pre-heating temperature of 1 100 ℃and pouring temperature of 1 500 ℃,misrun,cold shut and grain coarseness in the blades can be eliminated effectively.In addiiton,through modifying gating-riser system,shrinkage porosity in the blades can be avoided.  
        关键词：Investment Casting;Shrinkage Porosity;Grain Refinement;Turbine Blades   
        2
        |
        98
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130508 false
        发布时间：2023-12-18
      • Ren Yubo,Wang Mingpu,Li Zhou,Lei Qian
        Vol. 34, Issue 2, Pages: 194-197(2014) DOI: 10.15980/j.tzzz.2014.02.031
        摘要：The temperature field and flow field of high temperature melt in the nozzle in the casting-rolling copper process were simulated by the ANSYS software.The results reveal that at a fixed castingrolling temperature,with the increase of casting speed,the solidification position of roll-casting billets is gradually shift to right,and the flow uniformity is increased.However,the over-high rolling speed is harmful for forming of roll-casting billet and roll of the plate.At a given roll-casting speed,with the increase of pouring temperature,roll-casting billet solidification position is shifted to right gradually,however effects on the flow field distribution can be ignored.The optimized processing parameters were presented as follows:roll casting temperature of 1 150 ℃～1 170 ℃and roll casting speed of 600 mm/min～1 000 mm/min.Based on the optimized parameters,the T2 copper continuous roll casting slab was formed successfully.  
        关键词：T2Copper;Continuous Roll Casting;Temperature Field;Flow Field;Numerical Simulation   
        2
        |
        147
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130700 false
        发布时间：2023-12-18
      • Lu Wangke,Xie Jingpei,Wang Aiqin,Wang Wenyan,Zhang Yindi
        Vol. 34, Issue 2, Pages: 198-200(2014) DOI: 10.15980/j.tzzz.2014.02.011
        摘要：Copper and aluminum composite plate fabricated by solid-liquid bonding method was rolled in different processes and then annealed at 300℃for 4h.The tensile strength,elongation,interface peel strength and conductivity were tested,and structure of interface was analyzed with the help of optical microscope and scanning electron microscopy to understand effects of rolling and annealing treatment on microstructure and properties of bonding interface diffusion layer.The results show that CuAl2phase formed after rolling can weaken the peel strength and conductivity,however,with annealing treatment,the mutual diffusion of atoms in bonding interface is promoted to form Cu9Al4 phase,improving the performance and electric conductivity of composite plate.  
        关键词：Copper and Aluminum Composite Plate;Bonding Interface;Peel Strength;Conductivity   
        2
        |
        358
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130977 false
        发布时间：2023-12-18
      • Chen Shengna,Yang Wei,Yu Huan,Xu Zhifeng,Yan Qingsong,Cai Changchun
        Vol. 34, Issue 2, Pages: 201-204(2014) DOI: 10.15980/j.tzzz.2014.02.032
        摘要：With different solution temperature and holding time,the microstructure evolution and microhardness of AZ91D magnesium alloys containing SiC particles were investigated.The results show that the continuous net-likeβphase in initial as-cast ingot disappears gradually with the increase of solution temperature,accompanying with the fragmentation of Mg2Si phase with Chinese script morphology,and spheroidization rate is increased.The grain boundary becomes distinct with the solution temperature of 400 ℃.With solid solution treatment at 400 ℃ for 16h,the unstableβphase is almost dissolved into the matrix phase and the spheroidization of Mg2Si phase exhibits desirable.However,the change of morphology of Al8Mn5 phase can not be observed due to its high decomposition temperature.After solid solution at 400 ℃ for 20h,the spheroidization trend is weakened and the primary grain is coarsened greatly.The value of micro-hardness is decreased continuously as a result of the disappearance ofβphase and spheroidization of Mg2Si phase,while a slight increase of the micro-hardness for the sample at 400℃ for 16h can be observed due to solution strengthening.  
        关键词：AZ91D Magnesium Alloys;SiC Particles;Solution Heat Treatment;Spheroidization of Mg2Si   
        2
        |
        200
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130766 false
        发布时间：2023-12-18
      • Ma Junjie,Zhang Yong
        Vol. 34, Issue 2, Pages: 205-207(2014) DOI: 10.15980/j.tzzz.2014.02.033
        摘要：Due to the problems in the serious segregation tendency and poor strip microstructure,performance uniformity as well as the low service life of elastic components,it is a acceptable choice for C64780 alloy substituted for the phosphor bronze.Compared with the phosphor bronze,C64780 alloy as silicon bronze alloy,is the equivalent in density,melting temperature,fatigue life,strength and hardness,and is superior in resistance stress relaxation and more high conductive/thermal conductivity as well as softening temperature.C64780 alloy can decrease the cost of raw materials and control the processing costs,and greatly improve the problems from the use of the phosphor bronze.  
        关键词：C64780Alloy;Mechanical Properties;Electric Conductivity;Phosphor Bronze   
        2
        |
        111
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46131129 false
        发布时间：2023-12-18
      • Ning Jiajie,Li Xiaoqian,Li Ruiqing,Huang Mingzhe
        Vol. 34, Issue 2, Pages: 208-212(2014) DOI: 10.15980/j.tzzz.2014.02.034
        摘要：Ultrasonic was imposed on 7085 aluminum alloy melt during solidification to measure the temperature change in the melt caused by ultrasonic,and the temperature fluctuation in the melt occurs.Effects of the temperature fluctuation on undercooling nucleation in the aluminum alloy melt were investigated.The results show that cavitation bubbles caused by ultrasonic absorb heat during growth process to decrease the temperature around cavitation bubbles,while heat is released to increase the temperature around when cavitation bubbles collapse.In the experiment,the amplitude of temperature fluctuation is in range of 2～6℃,leading to the initial nucleation temperature increased from 638.4 ℃ to 644.5 ℃.Within the undercooling nucleation region,the temperature fluctuation can enhance the local undercooling degree and increases the maximum nucleation density from 47.1/mm3 to 92.6mm3.In the process of dendrite growth,the temperature fluctuation makes the necking-down dendrite side arm easier to detach,which increases new nucleus in the melt.  
        关键词：Ultrasonic;Temperature Fluctuation;Undercooling Degree;Nucleation   
        2
        |
        159
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46129512 false
        发布时间：2023-12-18
      • Li Sisi,Xu Zhifeng,Zhu Peilan,Zhang Shouyin,Cai Changchun
        Vol. 34, Issue 2, Pages: 212-215(2014) DOI: 10.15980/j.tzzz.2014.02.035
        摘要：To solve the problems in long cycle,poor quality of the casting surface,difficulty to meet the requirements of dimensional accuracy and low yield etc in the trial of aluminum box castings fabricated by conventional process from an aviation factory,ProCAST software was employed to simulate and optimize the casting process,and its overall coated sand mold/core was prepared by selective laser sintering（SLS）.The optimization of the casting process and two castings were completed within 5 days,and the aluminum box with complex surface,good metallurgical quality and qualified geometry was produced sucessfully,of which the surface roughness and dimensional accuracy reach Ra 6.3μm and CT6～8,respectively.It fully met the requirements,thus the aviation aluminum box castings manufactured by precision rapid sand mold casting was realized.  
        关键词：Rapid Casting;SLS Precision Sand Mold;Aluminum Alloy   
        2
        |
        308
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46128983 false
        发布时间：2023-12-18
      • Du Xuchu,Hong Runzhou,Fan Zhenzhong,Chen Mingwei
        Vol. 34, Issue 2, Pages: 216-221(2014) DOI: 10.15980/j.tzzz.2014.02.036
        摘要：The macro-fracture crack defects which appeared in the manufacture process of ZL101 aluminium alloy base casting was analyzed by chemical composition,mechanical properties and tensile fracture with the help of spectrum analysis,optical microscope（OM）,scanning electron microscope（SEM）,energy dispersive spectrometer（EDS）and mechanical property testing.The chemical composition nearby macro fracture crack is in line with HB962-2001 standards,and both the tensile strength under casting and T5 heat treatment state are more than 150MPa with elongation more than 4%.In addition,tensile fracture is characterized by the typical intergranular fracture morphology,where crack is generated in the grain boundry among the primary and eutectic silicon particles,then propagated along the grain boundry rapidly.Silicon particles are gradually spheroidized after T5 heat treatment.The FEM numerical simulation analysis of static force load shows that the peak static loading stress is decreased from 206.9MPa to 91.6MPa,and the dynamic displacement is reduced from 1.39mm to 0.61mm when enhanced rib is reduced from 10mm to 5mm,decreasing the macro-defects and improving the quality of the aluminum alloy base.  
        关键词：Base Casting;ZL101Aluminium Alloy;Crack;Numerical Simulation   
        2
        |
        129
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130180 false
        发布时间：2023-12-18
      • Fan Yingguang,Chen Ruxia,Yang Qijie,Su Guangcai,Huang Sijuan
        Vol. 34, Issue 2, Pages: 221-224(2014) DOI: 10.15980/j.tzzz.2014.02.037
        摘要：On the basis of traditional ZL101 alloy,the modified casting Al-Si alloy was developed by adding some alloying elements such as Cu,Ni,Mn,V,RE.The corrosion resistance of the modified alloy was examined in acid,alkali and salt corrosion medium at high temperature（85 ℃）.The results show that corrosion resistance of the modified alloy is superior to that of common ZL101 alloy in acid,alkali and salt corrosion medium at high temperature（85℃）.  
        关键词：Alloying;Cast Al-Si Alloy;Corrosion Resistance   
        2
        |
        140
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46130869 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 225(2014) DOI: 10.15980/j.tzzz.2014.02.038
        摘要：<正>20140201章旭文,林惠娟,许富渊,等.水平连铸过程中坩埚设计对铸嘴出口流场分布的影响.铸造工程学刊,2013,39（1）:1-8.在水平连铸中,薄带厚度均匀性依赖于铸嘴出口流场及铜轮转速与品质的稳定。其中,铸嘴出口流场的稳定性与坩埚液位高度或压力有关。模拟结果显示,当坩埚液位高度低于14cm时,铸嘴出口速度呈现不均匀的情况,会导致薄带有不均匀甚至破洞的可能。根据毛细数（Capillary Number,CA）分析结果,当CA值小于0.015且铸嘴长宽比（L4/B）大于30的情况下,坩埚内流体则无法顺利经铸嘴流出。  
          
        2
        |
        49
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46131773 false
        发布时间：2023-12-18
      • Vol. 34, Issue 2, Pages: 226(2014) DOI: 10.15980/j.tzzz.2014.02.039
        摘要：<正>20140201一种凹凸棒土制高温合金钢用复合发热剂,CN102814476A,2012.12.12,马鞍山科润冶金材料有限公司.本发明公开了一种凹凸棒土制高温合金钢用复合发热剂,是由下列原材料经过加工制成的:铝粉为10%～15%（质量分数,下同）、炭粉为4%～7%、凹凸棒土为9%～11%、粉煤灰为22%～30%、氧化铁为10%～21%、有机硅金云母为10%～12%、铝钒土为10%～13%、酸化石墨为6%～10%,所述粉煤  
          
        2
        |
        36
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46132497 false
        发布时间：2023-12-18
      0