最新刊期
      卷 31 ， 期 9 ， 2011
      • Su Yajun~1,Liu Xinhua~1,Wu Yongfu~1,Huang Haiyou~1,Xie Jianxin~1,Wang Lianzhong~2,Dong Xiaowen~2
        Vol. 31, Issue 9, Pages: 785-790(2011)
        摘要：Processing parameters and microstructure as well as properties of copper cladding aluminum composite rod fabricated by horizontal core-filling continuous casting were investigated.Effects of annealing treatment on interface plasticity of CCA rod were observed.The desirable quality copper cladding aluminum composite rod with 30 mm in diameter and 3 mm in sheath thickness could be successfully produced in conditions of 210 mm in mandrel length,liquid copper temperature of 1 230 ℃,liquid aluminum temperature of 770850 ℃,first cooling water volume of 600 L/h and secondary cooling water volume of 600800 L/h as well as average pulling velocity of 6087 mm/min.Plasticity of the interface can be greatly improved with annealing treatment at 530 ℃ for 50 min.Tensile strength and elongation of the copper cladding aluminum composite rod reach 8094 MPa and 18%31%,respectively.  
        关键词：Copper Cladding Aluminum Composite Rod;Horizontal Core-filling Continuous Casting;Fabrication Process;Microstructure   
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      • Wang Jimin~1,Yan Hongjie~1,Zhou Jiemin~1,Li Shixuan~2,Gui Guangchen~2
        Vol. 31, Issue 9, Pages: 791-796(2011)
        摘要：In order to improve the energy efficiency and melt quality and to reduce the pollutant emission,based on validating results by heat balance test for regenerative aluminum melting furnace from a company,a reasonable model of aluminum melting furnace was established to optimize processing parameters.CFD software Fluent was used to simulate and optimize coupling field between liquid aluminum and combustion space at the varied horizontal angle between burners of the aluminum melting furnace.The results show that the desirable melting performance can be obtained with the horizontal angle between burners of 90°.  
        关键词：Aluminum Melting Furnace;Horizontal Angle Between Burners;Numerical Simulation   
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      • Vol. 31, Issue 9, Pages: 796(2011)
        摘要：<正>"目前,欧洲模具已越来越感受到来自中国同行所带来的影响和压力,预计到2018年,中国将一跃成为全球最大的模具制造业基地之一。相信通过双方的共同努力和合作,中国模具必将在这个广阔的舞台上占有一席之地。"国际模协秘书长罗百辉日前对宁海模具城考察时表示,对中国的模具发展未来充满信心。  
          
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      • Vol. 31, Issue 9, Pages: 799(2011)
        摘要：<正>中国有色金属工业协会近日公布了2010年我国有色金属工业销售收入前50名企业名单。名单显示,前50家有色金属企业实现销售收入12636亿元,同比增长47.94%,占全国有色金属工业规模以上企业销售收入的42.12%。据中国有色金  
          
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      • Vol. 31, Issue 9, Pages: 815(2011)
        摘要：<正>为共同探讨加强高校和企业合作,充分发挥重点高校和龙头企业在引领行业技术进步、人才培养方面的核心作用,进而推动建设金属工业强国,7月22日,由中国有色金属工业协会主办的首届有色高校、企业与行业发展座谈会在北  
          
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      • Vol. 31, Issue 9, Pages: 823(2011)
        摘要：<正>为加强稀土矿山生态保护与治理恢复工作,日前,国家环保局发布《关于加强稀土矿山生态保护与治理恢复的意见》。意见要求,各级环境保护行政主管部门要进一步提高对加强矿山生态保护与治理恢复重要性、必要性和紧迫性  
          
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      • Vol. 31, Issue 9, Pages: 827(2011)
        摘要：<正>第八届国际镉业大会将于2011年11月10-12日在云南昆明举行。本次大会旨在回顾过去20年镉行业的研发成果,将邀请包括镉混合物和含镉制品的厂家、加工方、终端用户、废品处理者、回收管理机构、环境健康安全专家以及学术界来一起分享他们镉方面的知识和技术。为期两天的会议将回顾世界镉市场的重大事件,镉在其主要  
          
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      • Vol. 31, Issue 9, Pages: 836(2011)
        摘要：<正>2011年8月18日,由中国有色金属工业协会、中国有色金属加工协会、河南省有色金属行业协会共同主办的"中国铝工业电解铝液直接铸坯项目试点推动大会"在郑州召开。有色金属工业是资源和能源的消耗大户,电解  
          
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      • Vol. 31, Issue 9, Pages: 847(2011)
        摘要：<正>日前,国土资源部发出关于贯彻落实《国务院关于促进稀土行业持续健康发展的若干意见》的通知,要求开展全国稀土行业生产秩序专项整治,全面清理稀土探矿权采矿权,提高开采准入门槛,原则上禁止现有稀土开采矿山扩  
          
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      • Vol. 31, Issue 9, Pages: 850(2011)
        摘要：<正>为鼓励和推动全国广大铸造工人敬业爱岗、学习技术、钻研业务,整体提高我国铸造工人的专业技术水平和岗位操作能力,中国铸造协会自2004年起,每两年举办一次"‘圣泉杯’全国铸造工人技术操作能手评比"活动,实践表明,这在我国铸造界取得了良好的效果,为加速我国尽早跻身世界铸造强国之林具有  
          
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      • Vol. 31, Issue 9, Pages: 865(2011)
        摘要：<正>"十二五"末,包头市将依托包钢稀土等龙头企业,以稀土高新区为平台,力争实现稀土产业产值00亿元,将包头市打造成为世界级稀土生产及应用产业基地。"十二五"期间,包头市将加快转变稀土产业发展方式,依托包头稀土  
          
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      • Vol. 31, Issue 9, Pages: 868(2011)
        摘要：<正>2011年8月25日,全国工商联在京召开2011中国民营企业500强发布会,发布2011中国民营企业500强、2011中国民营企业制造业500强名单,圣泉集团首次入选,并分列456位、302位,彰显了圣泉集团强大的综合实力和十足的  
          
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      • Zeng Zhaofeng
        Vol. 31, Issue 9, Pages: 797-799(2011)
        摘要：Al2O3/Cu composites were fabricated by high-energy ball milling and powder metallurgy method.Thermal conductivity of the composites at room temperature was investigated with double-specimens by laser pulse superposition method.It is found that thermal conductivity of the composites is decreased gradually with increasing in Al2O3 volumetric fraction,especially the volumetric fraction of Al2O3 more than 10%,which verifies the close relation of Al2O3 content with the thermal conductivity of the composites.Thermal conductivity is seriously dependent on interior defects and density of the composites.To obtain the Al2O3/Cu composites with desirable thermal behavior,it is considered by controlling the volumetric fraction of Al2O3 lower than 10% and improving density as well as decreasing the dislocation and voids in the preforms.  
        关键词：Al2O3/Cu Composites;Powder Metallurgy;Thermal Conductivity;Density;Interior Defects   
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      • Duan Yonghua,Sun Yong,He Jianhong
        Vol. 31, Issue 9, Pages: 800-803(2011)
        摘要：Cast Pb-Mg-10Al alloys with different B contents were prepared with vertical high-frequency induction furnace,and their frictional and wear behavior were examined.Microstructure of the alloy prepared was analyzed by XRD（X-ray diffraction） and SEM（scanning electron microscope）.The results show that,with increasing in B content,the ceramic phase AlB2 formed in the alloy is increased,which is responsible for the great increase of hardness.In addition,wear resistance of the alloy is improved with the increase of B addition.The minimum wear rate and frictional coefficient can be observed for the alloy with 2% B addition.  
        关键词：Pb-Mg-10Al Alloy;B;Ceramic Phase;Friction and Wear;Frictional Coefficient   
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      • Chen Shoudong,Chen Jingchao,Yang Yunchuan
        Vol. 31, Issue 9, Pages: 803-806(2011)
        摘要：Micro-mathematical models of macro-velocity filed,heat transfer,solute transfer and solidification structure formation and macro-micro coupling model during solidification process in twin-roll continuous casting strip were established,in which equivalent specific heat method was employed to treat latent heat and mesh was divided by assumed streamline boundary.Meanwhile,with the help of solid fraction,taking varied mesh size and time-steps in macro-micro condition,the coupling of macro-micro model is realized.The simulated results are well in agreement with the experimental ones.  
        关键词：Twin-Roll Continuous Casting;Solidification Structure;Mathematical Model;Coupling;Simulation   
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      • Zeng Li~1,Zhao Jianhua~1,Song Gang~1
        Vol. 31, Issue 9, Pages: 807-811(2011)
        摘要：Shrinkage porosity in metal mold gravity casting aluminum alloy motorcycle wheels was predicted with the help of Niyama criterion.The factors influencing shrinkage porosity（holes） were approached based on the Niyama criterion G/R,and the countermeasures were presented to reduce or eliminate the tendency of shrinkage porosity in the aluminum alloy wheel.  
        关键词：Niyama Criterion;Aluminum Alloy;Motorcycle Wheel;Shrinkage Porosity（Hole）   
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      • Vol. 31, Issue 9, Pages: 806(2011)
        摘要：<正>中铝网综合外电8月26日讯俄亥俄州废料处理商全球废料管理公司（GSM）已投入约300万美元建造铝铸造厂,预计该铸造厂将每月熔化400万吨废料。新的Altimet分区熔炼操作位于俄亥俄州巴达维亚前福特汽车有限公司变速箱厂  
          
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      • Vol. 31, Issue 9, Pages: 839(2011)
        摘要：<正>据美国弗里多尼亚集团的最新研究报告显示,由于电池、电子产品、汽车和永磁铁产量增长,全球稀土需求有望以年均7.1%的速度增加,到2015年达到19万吨。如果按美元计价,稀土的销售额将从2010年时的30亿美元增至2015  
          
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      • Vol. 31, Issue 9, Pages: 844(2011)
        摘要：<正>日本住友金属矿业公司日前表示,由于中国不锈钢需求增加以及新的镍矿项目停滞,镍价下跌受到限制,全球镍盈余可能收窄。住友金属矿业负责镍和原料销售的总经理Toru Higo表示,预计今年镍供应可能比镍需求高出2万吨  
          
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      • Vol. 31, Issue 9, Pages: 880(2011)
        摘要：<正>近日,总部设在牙买加首都金斯敦的国际海底管理局批准了中国和俄罗斯在海底勘察开采矿产资源的申请。作为全球最大的矿产资源需求国,中国获得在海底勘察开采矿产资源的授权意义非常重大。目前,中国"蛟龙"号深海潜水器正在东北太平洋一处海域进行深潜实验。尽管目前勘探开发海底资源在技术上仍存在难题而且商业  
          
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      • Xu Yonghong~1,Zhang Hengfei~1,Wang Yong~1,Zhao Minghua~3,Song Changjiang~1
        Vol. 31, Issue 9, Pages: 811-815(2011)
        摘要：The roles of RE in Ag and Ag alloy were described including purifying melt,refining grain size and improving mechanical properties,wear resistance of electronic contactor and anti-arc properties,increasing oxide resistance,optimizing electrochemical properties as well as improving anti-tarnish ability.The future development and application of Ag alloy containing RE were reviewed and prospected.It was described for series of Ag based electronic contacting materials with RE and functional materials.And then,the application of RE was extended to other precious metal scope,which was beneficial for increasing the add-value of RE element.  
        关键词：RE;Ag Alloy;Electronic Contactor;Ornamental Material   
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      • Xie Jinle,Liu Yunzhong,Wu Huijiang,Li Fengxian
        Vol. 31, Issue 9, Pages: 816-819(2011)
        摘要：The flow stress behavior and microstructure of semi-solid 7050 aluminum alloy during hot compression deformation process were investigated on the Gleeble-3500 thermal-mechanical simulator at the deformation temperature of 420465 ℃ and strain rate of 0.0010.1 s-1.The results show that the flow stress is increased sharply to reach the peak value with increasing in strain at the initial stage,and then tends to be constant,and it is increased with the strain rate increase while it is decreased with rising the deformation temperature.The flow stress can be described by a constitutive equation in hyperbolic sine function.The deformation activation energy is evaluated by linear regression analysis to construct the constitutive equation on flow stress of the alloy during hot compression.With increasing in temperature and decreasing in strain rate,the elongated grains in the deformed alloy is grown.The main softening mechanism of the deformed alloy during hot compression deformation exhibits dynamic recystallization.  
        关键词：Semi-Solid 7050 Aluminum Alloy;Flow Stress;Hot Compression Deformation;Dynamic Recrystallization   
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      • Xu Yulei~1,Zhang Kui~1,Li Xinggang~1,Lei Jian~2
        Vol. 31, Issue 9, Pages: 820-823(2011)
        摘要：Effects of the mischmetal addition in range of 0.4%1.7% on the microstructure mechanical properties of die casting AZ91D alloy were investigated to improve the elevated tempurature mechanical properties of the alloy.The results reveal that ambient tempurature mechanical properties of the alloy are almost independent of the mischmetal addition.Mechanical properties of the die casting AZ91D alloy with 0.4% mischmetal addition at 100℃ are near to those of the alloy at room temperature.Tensile strength,yield strength and elongation of the die casting AZ91D-0.4MM at 170 ℃ reach 206 MPa,142 MPa and 26%,respectively,increased by 15.7%,10%,and 30%,respectively,compared with those of die casting AZ91D alloy without MM addition,which is attributed to the formation of strengthening phase with high thermal stability due to the addition of proper MM increasing the dislocation sliding restrain the propagation of crack as well as the solid solution strengthening effects in the magnesium matrix.  
        关键词：Die Casting Magnesium Alloy;MM;Mechanical Properties;Microstructure   
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      • Liu Zelin,Li Luoxing,Wang Shuiping,Zhu Biwu,Wang Yang
        Vol. 31, Issue 9, Pages: 824-827(2011)
        摘要：Effects of processing parameters on mechanical properties of squeezing casting ADC12 alloy were investigated.Through simulating squeezing casting process of door inner panel with the help of a CAE software,distribution of temperature field during filling process was presented at different pouring temperatures and mold temperatures.Based on the simulation results,two sets of processing parameters were designed to squeeze door inner panel for automobile,and door inner panel was produced successfully.Evaluation of aluminum panel quality was carried out in term of tensile testing,metallographic observation,environmental scanning electron microscope（ESEM） and auger electron spectrometry.It is found that the door inner panel with a relatively high mechanical properties and good surface quality as well as fine quiaxed primary Al phase can be obtained with pouring at 730 ℃ and pressure of 27 MPa as well as mold temperature of 310 ℃.  
        关键词：Squeezing Casting;Aluminum Alloy Door Inner Panel;Al-Si Alloy;Mechanical Properties;Microstructure   
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      • Zhou Jianbo~1,Tian Fuxiang~2
        Vol. 31, Issue 9, Pages: 828-829(2011)
        摘要：Aiming at problems in inadequate filling in thin-walled castings with deep cavity,a special gating system,top sprue feeding,was adopted with designing overflow well with large capacity.The inadequate filling in the die castings has been successfully solved,making sure the rational production.Mould structure for the castings with deep cavity was designed,and mould operation procedure was described.The mould possesses the features of reliable,maintain easy and high efficiency.  
        关键词：Thin-walled Shell;Top sprue;Ejector Pin;Die Casting Die   
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      • Zhang Qinglang,Su Yong,Chen Yiqing
        Vol. 31, Issue 9, Pages: 830-833(2011)
        摘要：Based on the processing analysis of die casting magnesium alloy engine cylinder body,through orthogonal testing,filling and solidification of liquid magnesium alloy were simulated by the software.The optimized processing parameters were determined as follows:mold preheating temperature of 220 ℃,pouring temperature of 670 ℃,and injecting velocity of 8.5 m/s.In addition,influencing order of parameters on defects was presented.Through applying the optimized processing parameters to dynamically observe the filling and solidification of liquid magnesium alloy,filling and solidification time as well as potential distribution and volumetric fraction of shrinkage porosity（gas hole） were predicted,realizing the optimization pf processing parameters of die casting engine cylinder body.  
        关键词：Magnesium Alloy;Die Casting;Orthogonal Testing;Numerical Simulation;Filling and Solidification   
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      • Tian Lei,Wang Qinfeng,Duan Huizhen,Shen Jiangnan,Li Yanping
        Vol. 31, Issue 9, Pages: 834-836(2011)
        摘要：Filling and solidification process of low pressure casting Cu alloy faucet body were simulated by the Procast software to observe the distribution of temperature field and flow field.The simulated results show there exist apparently misrun defects in the initial design,which is accordant with the practical produced ones.Based on the theoretical analysis and experimental validation,modified design was presented such as partial thickness-increment at middle location of solidification ahead to complete sequential solidification,and the increase of flow by enlarge ingate size as well as the increase of exhaustion by increasing riser size at misrun location.The simulation of the modified design was conducted.The results reveal that the misrun in the faucet body can be eliminated,greatly decreasing the rejection rate.  
        关键词：Faucet Body;Copper Alloy;Low Pressure Casting;Numerical Simulation;ProCAST Software   
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      • Han Xiongwei~1,Li Xinxing~1,Chen Zuhong~2
        Vol. 31, Issue 9, Pages: 837-839(2011)
        摘要：Numerical simulation of temperature field in Al alloy die casting dies was conducted by the Procast software to understand the temperature variation on die surface during die casting cycle.The change of thermal stress in die casting die in process of die casting was analyzed by taking simulated results from temperature field as initial condition to input.The optimized processing parameters were presented,and potential defect positions were predicted by the visualization.  
        关键词：Aluminum Alloy;Die Casting Die;Temperature Field;Thermal Stress Field   
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      • Vol. 31, Issue 9, Pages: 840-842(2011)
        摘要：Digital online monitoring system was employed to vacuum melting furnace to reduce artificial-factors on casting quality and to realize the information control to casting process.Through online monitoring main parameters of vacuum furnace including temperature,vacuum rate,and pouring velocity,the whole process of vacuum melting was monitored to make sure the rational implementation of melting technology and to avoid the potential problems,effectively reducing the waste rate of the castings.  
        关键词：Elevated Alloy;Vacuum Melting Furnace;Digitalization;Online Monitoring   
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      • Fan Xiuqia
        Vol. 31, Issue 9, Pages: 842-844(2011)
        摘要：Manufacturing of square hole in investment casting stainless operation handles by broaching,punching hole and extrusion method was introduced,and machining experiment of the square hole was conducted.The practical production shows that the square hole in the investment casting stainless manufactured by extrusion method exhibits the advantages of low product cost,rapid manufacturing and high machining precision.  
        关键词：Square Hole in Investing Casting;Drawing Hole;Punching Hole;Extrusion   
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      • Ying Genpeng~1,Zheng Youchun~2,Zhang Zhou~3
        Vol. 31, Issue 9, Pages: 845-847(2011)
        摘要：The performances of special hot glue stick for full mold casting and commercial common glue stick were analyzed comparatively.It is found that the commercial common glue stick is not suitable for full mold casting.Special hot glue stick exhibits acceptable performances,achieving the practical attention with the help of the hot glue spreader as a feature of its convenient and flexible operation.  
        关键词：Lost Foam Casting;Special Hot Glue Stick;Pattern Bonding;Glue Spreader   
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      • Wu Laifa~1,Zhang Yilin~1,Shan Baohua~1,Peng Jun~2,Ye Shengping~2
        Vol. 31, Issue 9, Pages: 848-850(2011)
        摘要：The minimum time of stop-vacuum and open-mould in V-method casting balancer for forklift truck was evaluated.by the huazhu CAE.The detailed procedure was described for determining vacuum-holding time and open-mould cooling time with the help of the Huazhu CAE software.  
        关键词：V-method casting;Holding Vacuum Time;Open-mould Time;CAE Software   
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      • Zhu Xue,Li Wenzhen,Liu Shiying,He Guangjin,Zhu Xianmeng
        Vol. 31, Issue 9, Pages: 851-855(2011)
        摘要：n-SiCp/AZ91D magnesium matrix composites were fabricated by mechanical stirring and high intensity ultrasonic dispersion processing,and mechanical properties of the composites at room temperature and at high temperature were examined.The results show that the elevated mechanical properties of the composites are greatly improved by introducing n-SiC particle.The maximum value of tensile strength and elongation of the composites can be observed with 1.5% SiC particle addition.However,with the temperature increase,the tensile strength is decreased,and elongation is further increased.The fractography observation reveals that the fracture mechanism of the composites is transformed for quasi-cleavage fracture at room temperature into the ductile one at high temperature.  
        关键词：Ultrasonic Dispersion;Nano-sized SiC Particles;Magnesium Matrix Composites;Elevated Mechanical Properties   
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      • Wang Juan~1,Chen Weiping~2,Zheng Kaihong~1,Zhou Nan~1,Qi Wenjun~1
        Vol. 31, Issue 9, Pages: 856-858(2011)
        摘要：Construction of ceramic network with complicated topological structure was successfully realized by joining 99% Al2O3 ceramic green billets with conventional ceramic slurry.Microstructure of bonding interface of ceramic network was characterized by SEM（scanning electron microscope）.The results show that the thickness of middle layer is approximately 250 μm,and the ceramic network exhibits desirable mechanical properties.Liquid aluminum alloy was infiltrated into the constructed network by pressure infiltration processing to obtain the 3D co-continuous composites.The fabricated composites exhibit the features of light weight and high strength.  
        关键词：Ceramic-Metal Composites;3D Network Ceramics;Green Joining;Melt Infiltration   
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      • Guo Wenxuan~1,Si Naichao~1,Sun Shaochun~1,Liu Guanglei~1,Wu Qinfang~2
        Vol. 31, Issue 9, Pages: 859-862(2011)
        摘要：Aluminum alloy multi-step samples were prepared in common sand mold and in chromite sand mold,and the tensile strength,yield strength,elongation and hardness of the prepared samples were examined.Meanwhile,the microstructure of the samples prepared was observed,and the grains size and DAS（secondary dendrite arm space） were comparatively analyzed.The results show that the sample prepared in chromite sand mold is obviously improved in tensile strength and is increased in elongation at the thin-walled location,meanwhile,it is superior to those in common sand mol in grains size and DAS,however,it is lower than that in common sand mold in cooling rate sensitivity.The chromite sand is more suitable for preparing the parts with high strength,however,it is not suitable for the mold materials for the complicated castings due to its intense cooling rate resulting in the low fluidity of liquid metal.So it was limited in application scope.  
        关键词：Chromite Sand;Casting Aluminum Alloy;Mechanical Properties;DAS   
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      • Liu Xiao,Yang Sheng,Zhao Yan
        Vol. 31, Issue 9, Pages: 862-865(2011)
        摘要：Effects of Ti on microstructure and properties of heat resistant conductive aluminum alloy contained Zr and B were investigated.The results show that,with Ti addition,compound（Ti,Zr）B2 phase is formed with Zr and B in the alloy.Distortion of Al matrix is decreased and order in Al matrix is increased as a result of lattice constant of（Ti,Zr）B2 phase lower than ZrB2,improving the conductivity of Al alloy.Through adjusting B content,the molar ratio of B via Ti+B is more than 2:1 in the absence of excessive Ti,further improving the conductivity of the Al alloy.  
        关键词：Conductive Aluminum Alloy;Conductivity;Zr;Ti;B   
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      • Mo Jianxin,Pan Qinglin,Chen Qin,Liu Chang
        Vol. 31, Issue 9, Pages: 866-868(2011)
        摘要：Secondary phase and inclusions in 3104 aluminum alloy big flat ingot were observed by SEM（scanning electron microscope） and EDS（energy dispersive spectrometry）.The results show that there exists a lot of coarse skeleton（FeMn）Al6 phase and a little α-Al（MnFe）Si,Mg2Si and free Si-rich phase in the 3104 aluminum alloy flat ingot.Inclusions in the flat ingot are mainly composed of oxides,residual fluxes and Si-rich or Ti-rich intermetallic compounds.The origination of inclusion in the flat ingot was approached,and countermeasures of eliminating or reducing coarse compound and inclusions were presented.  
        关键词：3104 Aluminum Alloy;Secondary Phase;Inclusions   
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      • Vol. 31, Issue 9, Pages: 869(2011)
        摘要：<正>1铝缸盖铸造工艺分析在铝合金发动机缸盖的重力铸造工艺开发过程中,通常选择底注或顶注浇注方式,但有些铝缸盖由于受结构限制,不便于采用这两种浇注方式,见图1。图1缸盖照片由于铝缸盖进排气侧油池壁均向内收,且有凸凹结构,若采用顶注,则铝液进入型腔后会顺着油池壁的形  
          
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      • Ding Liang,Zhao Guoping
        Vol. 31, Issue 9, Pages: 870-873(2011)
        摘要：Cu-Cr-Zr alloy was successfully prepared with adding Zr by impacting-melting method and by cored wire method,and absorption rate of Zr element in the alloy prepared by the kinds of method was analyzed,meanwhile,as-cast microstructure of the Cu-Cr-Zr alloy prepared was observed.The results show that,compared with that in the alloy prepared by impacting-melting method,Zr absorption rate in the alloy prepared by cored wire method is increased by approximately 32.54%,apparently decreasing the product cost.As-cast microstructure of the Cu-Cr-Zr alloy prepared is composed of matrix Cu,Cr-enrichment phase and CuCr-enrichment phase,and absence of CrZr phase can be observed.Needle-like fiber Cr-enrichment phase or Cr-enrichment particle is mainly distributed into the matrix,and a part of Cr with Zr is reacted to generate ternary phase.Irregular CuZr-enrichment phase is mainly distributed along grain boundary.  
        关键词：Cu-Cr-Zr Alloy;Absorption Rate;As-cast Microstructure   
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      • Xiang Xiongzhi~1,Ma Songfeng~2,Bai Xiaojun~1
        Vol. 31, Issue 9, Pages: 874-877(2011)
        摘要：Based on CIELAB chromatic theory,effects of different Al and Zn content on chroma,anti-tarnish and anti-oxidation behavior of brass based stimulant gold alloy with 70% Cu content were investigated quantitatively.The results show that color-difference is enlarged between surface color of alloy and gold as a result of Al addition weakening the yellow color in surface color of the alloy,improving the anti-tarnish behavior and hardness of the alloy.The possible factors influencing anti-tarnish and anti-oxidation behavior of the alloy were approached.  
        关键词：Stimulant Gold Alloy;CIELAB;Chroma;Anti-tarnish;Oxidation   
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      • Li Rui,Chen Wenge,Tao Wenjun
        Vol. 31, Issue 9, Pages: 877-880(2011)
        摘要：The microstructure and related properties of the high strength and high conductivity tungsten copper alloy which was prepared by loose-packing and infiltration method with the average tungsten granularity of 50 nm and 7 μm as well as 99.9% purity were investigated.The results show that the high strength and high conductivity Cu-W alloy can be prepared by loose-packing and infiltration method.With the decrease of W powder size,the alloy is improved increasingly in the sintering behavior,density,hardness and strength.However,with the powder granularity reaching to nanometer grade,microstructure uniformity of the alloy is decreased as a result of the segregation of copper phase.The porosity of the loose-packing W powder is increased with decreasing in average diameter of powder granularity.The tensile strength,electric conductivity,hardness and Cu content of the alloy prepared with 7 μm W powder reach 370 MPa,43.34 μΩ-1·m-1,80.4 and 65%,respectively,and those of the alloy prepared with 50 nm reach 410 MPa,37.07 μΩ-1·m-1,112,73%,respectively.  
        关键词：Loose-packing and Infiltration;Cu-W Alloy;Porosity;W Skeleton   
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      • Vol. 31, Issue 9, Pages: 881-882(2011)
        摘要：<正>铜车马仪仗队（见下页）东汉（公元25年～220年）主车与马高40cm,车通长36 cm,婢俑高19.5～24 cm青铜甘肃武威东汉张胜将军夫妇合葬墓出土铜车马仪仗队包括马车、马、牛、骑佣、武士俑、奴婢佣等  
          
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      • Vol. 31, Issue 9, Pages: 883(2011)
        摘要：<正>20110901林晟,唐自标.稀土元素Ce对薄壁球墨铸铁球化率衰退的影响.铸造工程学刊,2010,36（3）:19-26.研究稀土元素Ce对薄壁球墨铸铁球化率的影响。试验中的参数,球化剂部分包括稀土元素的添加量,尺寸,球化反应时间及球化方式,孕育剂的数量及孕育方式。以质量分数大于  
          
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      • Vol. 31, Issue 9, Pages: 884(2011)
        摘要：<正>20110901一种JDY材料铸型砂芯,CN101912946A,2010.12.15,刘昆湘,向龙生.本发明提供了一种含有JDY材料的新型铸造砂芯。该发明由于JDY材料的添加使砂芯在浇注高温钢水条件下,促使砂芯在钢液凝固过程中产生退让性,从而使铸件表面光洁而不产生裂纹,解决了箱体铸钢件普遍存在裂纹现象的技术缺陷。  
          
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