最新刊期
      卷 31 ， 期 4 ， 2011
      • Yin Yujun,Zhao Zhongmin,Zhang Long,Pan Chuanzeng
        Vol. 31, Issue 4, Pages: 295-298(2011)
        摘要：With the help of combustion synthesis under high gravity,TiC-TiB2 fine-grained composite ceramics with different TiB2 contents were prepared by rapid solidification method.Microstructure and mechanical properties of the prepared composite ceramics were investigated by XRD（X-ray diffraction）,FESEM（field emission scanning electron microscope） and EDS（energy dispersive spectrometer） as well as tensile testing.The results reveal that,with increasing in TiB2 content,microstructure of the TiC-TiB2 composite ceramics is composed of those from fine TiC spherical grains to fine TiB2 platelet structure,whereas when TiB2 content reaches 50%（in atom fraction）,ceramics consist of eutectic structure where small-sized TiB2 platelets are embedded in TiC matrix.Relative density and Vickers hardness of TiC-50TiB2 reach up to maximum value（as 98.6% and 18.4GPa,respectively） as a result of eutectic reaction during solidification,meanwhile,TiC-66.7TiB2 ceramics exhibit maximum fracture toughness of 13.4MPa·m1/2 as a result of the cooperative action of crack deflection,crack-bridging and pull-out toughening from fine TiB2 platelets.  
        关键词：TiC-TiB2 Composite Ceramics;Combustion Synthesis;High Gravity;Structure Transformation;Toughening;Fine Grain Strengthening   
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      • Zhang Shixing,Li Xiaohua,Zhang Xiao
        Vol. 31, Issue 4, Pages: 298-300(2011)
        摘要：Effects of pre-aging treatment on microstructure and properties of Al-Zn-Mg-Cu alloy during thermo-mechanical treatment process were investigated.The results show that optimized pre-aging parameters can be obtained with proper increasing in aging temperature and holding time.Recrystallizaion grain size can be greatly refined in pre-aged alloy in the presence of precipitates.Hardness of the pre-aged alloy is increased to maximum value with the increase of deformation rate to approximately 40%,and then it is slightly decreased with deformation rate more than 40%.Hardness increase of the deformed alloy after final aging treatment can be ignored.  
        关键词：Al-Zn-Mg-Cu Alloy;Thermo-mechanical Treatment;Pre-aging;Microstructure;Hardness   
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      • Feng Yicheng,Wang Liping,Liang Zhenqiang,Guo Erjun,Jiang Wenyong
        Vol. 31, Issue 4, Pages: 301-304(2011)
        摘要：Effects of different Nd contents on microstructure and mechanical properties of Mg-2Ca alloy were investigated by optical microscope,SEM（scanning electron microscope） and EDS（energy dispersive spectrometer）,XRD（X-ray diffraction） as well as universal tensile testing machine.The results reveal that,with increasing in Nd contents,the grain size in the alloy is obviously refined,however,with Nd content higher than 2%,grain size is increased with the increase of precipitates in the grain boundary,where amounts of acicular Mg-Nd phase are precipitated from the grain.With increasing in Nd contents,tensile strength of the Mg-2Ca alloy is firstly improved and then descended,meanwhile,elongation is decreased,and hardness of the alloy is increased.  
        关键词：Mg-Ca Alloy;Microstructure;Mechanical Properties;Nd   
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      • Liu Jingfu1,Li Rongde2,Bai Yanhua2
        Vol. 31, Issue 4, Pages: 305-308(2011)
        摘要：High strength Zn-35Al-3.5Mn-2.2Cu-0.1Mg alloy was prepared by sprayed-forming method.Microstructure and mechanical properties of the alloy with solid solution at different temperature and holding times were investigated by XRD（X-ray diffraction） and SEM（scanning electron microscope） as well as tensile testing.The results indicate that microstructure of the alloy treated by two-stage solid solution is more desirable than that treated by single solid solution,where recrystallization grain size exhibits very fine with more dissolved precipitates.Tensile strength and yield strength,elongation of the alloy with two-stage solid solution at 360℃ for three hours and 390℃ for one hours reach up to 536MPa and 471 MPa,9.2%,respectively.  
        关键词：Sprayed Forming;Zn-Al-Mn-Cu-Mg Alloy;Tensile Strength;Solid Solution   
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      • Vol. 31, Issue 4, Pages: 300(2011)
        摘要：<正>目前世界上最高的地藏菩萨铜像顶部工程将在安徽九华山完成。地藏菩萨铜像由洛阳铜加工集团金像公司负责监制。该项目负责人介绍,安徽九华山地藏菩萨铜像高度为99米,地藏菩萨手持的锡仗高达110米,铜像总重达千余吨,是迄今为止世界上最大、最高的铸造铜像。  
          
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      • Vol. 31, Issue 4, Pages: 314(2011)
        摘要：<正>工信部、科技部、财政部联合印发《再生有色金属产业发展推进计划》,主要目标是到2015年,再生有色金属产业规模和产量比重明显提高,预处理拆解、熔炼、节能环保技术装备水平大幅度提升,产业布局和产品结构进一步优化,节能减排和综合利用水平显著提高。  
          
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      • Vol. 31, Issue 4, Pages: 347(2011)
        摘要：<正>继荣获深圳市2009年"标准化创新奖"后,近日,由力劲集团深圳领威科技有限公司主导编撰的《冷室压铸机》GB/T21269-2007再获殊荣,获得广东省质量技术监督局颁发的2010年"广东省标准创新贡献奖"二等奖。深圳领威科技有限公司由于在压铸机标准化工作上的突出贡献,又一次获得上级部门的肯定和嘉奖。  
          
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      • Vol. 31, Issue 4, Pages: 349(2011)
        摘要：<正>截至2月14日,由中冶所属中冶东方控股有限公司研发的三台连铸机结晶器外弧液压振动装置在西宁特殊钢股份有限公司三机三流大方坯合金钢连铸机上已连续运行40天,标志着该公司研发的又一项新产品经受住生产实践的考验并获得成功。  
          
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      • Vol. 31, Issue 4, Pages: 356(2011)
        摘要：<正>国务院总理温家宝2月26日主持召开国务院常务会议,研究部署促进稀土行业持续健康发展的政策措施。会议指出,稀土是不可再生的重要战略资源,在新能源、新材料、节能环保、航空航天、电子信息等领域的应用日益广泛。经过多年发展,我国稀土开采、冶炼分离和应用技术研究取得较大进步,产业规模不断扩大。但  
          
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      • Vol. 31, Issue 4, Pages: 362(2011)
        摘要：<正>美国东部当地时间3月29日,伊之密成功收购总部位于美国俄亥俄州（Ohio）的百年企业美国HPM公司的全部知识产权。收购内容包括HPM公司主营的塑料注射成型机、铝镁合金压铸机、塑料片材挤出生产线和  
          
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      • Vol. 31, Issue 4, Pages: 366(2011)
        摘要：<正>上海市压铸技术协会于2011年1月19日在上海科学会堂召开了第九届会员代表大会,进行了换届选举。新当选的上海市压铸技术协会第十届理事会35人,名单如下:张东、宋连柱、傅子卿、李刚、沈林根、印飞、吴建富、朱马鸿、范文龙、江钢、黄福祥、陈海根、杨希放、俞超明、丁鸿麟、韩文龙、徐宏、薛春、董磊、归顺发、谌晓勇、王勤、王国祥、张力群、庄继红、刘建、谢亦书、胡大军、万敏华、金敏晓、袁伯超、钱文龙、赵殿雁、张磊、江佳琦。  
          
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      • Vol. 31, Issue 4, Pages: 379(2011)
        摘要：<正>2011年2月,世界500强企业、全球第二大铸造化学品供应商日本花王株式会社与葫芦岛锦星铸造材料有限公司在葫芦岛北港工业区签订合资协议。未来双方将共同努力,把葫芦岛建设成为中国北方最大的铸造化学品产业基地。  
          
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      • Vol. 31, Issue 4, Pages: 304-338(2011)
          
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      • Guo Qiaoqin1,Jiang Bailing1,Li Jianping2,Wu Bing1
        Vol. 31, Issue 4, Pages: 308-310(2011)
        摘要：The Al-20Sn coatings on aluminum bearing alloy were deposited by magnetron sputtering technology.Effects of substrate bias voltages on microstructure,hardness,bonding strength and frictional coefficient of the coatings were analyzed.It is found that coating exhibits lamellar growth with substrate bias voltage at-60～-120V.With increasing in substrate bias voltage,film structure is transformed from coarse structure to fine one.Hardness of the coatings is inversely proportional to the substrate bias voltage.With substrate bias voltage of-120V,hardness,bonding strength between coating and the substrate and frictional coefficient reach up to HV80,35N and 0.15,respectively.  
        关键词：Magnetron Sputtering;Al-20Sn Alloy;Microstructure;Hardness;Frictional Coefficient   
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      • Song Peiwei
        Vol. 31, Issue 4, Pages: 311-314(2011)
        摘要：Effects of solid solution treatment（T4） on microstructure and mechanical properties of Mg-4Al-2Si（AS42） alloy were investigated.The results show that the alloy at both as-cast and heat treatment states is composed of α-Mg matrix,β-Mg17Al12 phase and Mg2Si phase.Mechanical properties of the T4 treated alloy are remarkably improved as a result of partially dissolution of β-Mg17Al12 phase and the spheroidization of Chinese script Mg2Si phase.The fracture mechanism of the both as-cast and T4 treated alloy is characterized by quasi-cleavage brittle fracture.  
        关键词：Mg-4Al-2Si Alloy;Solid Solution;Microstructure;Mechanical Properties   
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      • Li Shizhao1,Wu Shusen1,Fang Jianru2,Zhou Chengguang2,Wan Li1
        Vol. 31, Issue 4, Pages: 315-317(2011)
        摘要：There exists technological difficulty in die casting aluminum automobile gearbox housing because of its large dimension and complex geometry shape.Numerical simulation of die casting aluminum alloy gearbox housing was conducted,and potential defect position at the gearbox housing was accurately predicted.Based on practical die casting gearbox housing production,defect types and its origination were analyzed.Through optimizing processing parameters,suc as adopting modified ingate design and adding processing gap-bridge,the defects were decreased,greatly improving the quality of the gearbox housing.  
        关键词：Die Casting;Numerical Simulation;Defects;Processing Optimization   
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      • Xu Lin1,Guo Hongmin2
        Vol. 31, Issue 4, Pages: 318-321(2011)
        摘要：Solidification process of aluminum alloy was simulated by a macro-micro coupled model.The model coupled the finite differential method and cellular automaton method.Different from conventional cellular automaton model,the model considered not only temperature field diffusion but also solute diffusion in liquid and solid state as well as curvature undercooling.The relationship between the dendrite tip growth velocity and local undercooling were calculated based on KGT（Kurz-Giovanola-Trivedi） model,and temperature field and solute filed were calculated by FDM.In the macro-micro model,two kinds of grids were adopted to calculate macro-temperature field and microstructure evolution,greatly improving calculation efficiency.Micro-grain growth in the aluminum alloy and solidification of the alloy in permanent mold were simulated by the model,obtaining typical morphology of columnar grain transformed into equiaxed one in the alloy at three kinds of pouring temperatures.  
        关键词：Cellular Automaton;Numerical Simulation;Three-dimensional;Solidification Process;Micro-macro Coupling   
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      • Huo Jinxing,Qi Lehua,Zhou Jiming
        Vol. 31, Issue 4, Pages: 322-324(2011)
        摘要：Microcosmic model built on the bas is of RSA is the key foundation of simulation analysis of Csf/Mg composites with FEM technique.As material behavior of Csf/Mg composites is dependent on the parameters including fibre volume fraction,fibre orientation distributions and fiber length-diameter ratio,the efficiency would be reduced obviously if FEM models were established manually according to different simulation requirements.Therefore,a Python scripting language was used to establish a user defined graphic interface through second-developed ABAQSU GUI.The results indicate that it is viable to generate a graphic user interface with second-developed ABAQSU GUI according to clients’ demand,and the geometric model of Csf/Mg composites can be built automatically by inputting related parameters.Meanwhile,the modeling process is greatly simplified.The two-dimension or three-dimension geometric modeling of short fiber reinforced composites in which the orientation distribution of fibers exhibits random or uniform can be realized by using the RSA schemes.  
        关键词：Csf/Mg Composites;ABAQUS Second Development;Python Language;RSA Scheme   
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      • Kong Xiaowu1,Ling Zhenfei1,Zhang Xinhua2,Ruan Xiaofang3
        Vol. 31, Issue 4, Pages: 325-328(2011)
        摘要：An analysis instrument based on embedded technology for die casting machine was described,which could adapt to the harsh environment in the die casting plant.Besides the functions of displaying the technological curves and parameters,the instrument established the database of technological parameters and analyzed the database with statistical theory.As a result,the statistic parameters and probability distribution curves were drawn.A die casting machine could be desirably matched with its optimized mould design parameters.For the die casting whose technology parameters could not meet the requirements,an alarm signal would tell the operator to check the quality of the die castings.  
        关键词：Die Casting Machine;Shot Parameters;Analysis Instrument;Curves   
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      • Zhang Wei1,Yan Fengyun1,Mu Yujiang1,Yang Qunying1
        Vol. 31, Issue 4, Pages: 328-330(2011)
        摘要：Effects of isothermal treatment process and injection speed on microstructure and mechanical properties of thixo-forming Al-30Si alloy with 1% P modification were investigated by SEM（scanning electron microscope）,XRD（X-ray diffraction） and tensile testing.The results show that the morphology of primary Si phase exhibits more spherical with disappearance of acicular eutectic Si phase compared with as-cast microstructure,while α-Al phase is dispersedly distributed in the matrix as a result of broking into.A part of α-Al phase is retained in the slurry with the higher solid fraction.Ambient tensile strength of the alloy with holding at 620℃ for 100 min and 120 min firstly increases and then decreases with increasing in injection velocity,while for the 100 min,the maximum value of tensile strength is 226MPa at 6 m/s,and for 120 min,it is 230 MPa at 4 m/s.However,with holding at 630℃ for 120 min,tensile strength of the alloy is gradually decreased with the increase of the injection velocity.  
        关键词：Al-30Si Alloy;Processing Parameters;Thixo-forming;Microstructure;Mechanical Properties   
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      • Lu Hongyuan,Zou Zhihou,Lu Min,Zhao Xiaodong,Son Qing
        Vol. 31, Issue 4, Pages: 331-334(2011)
        摘要：Two-platen die casting machine is mainly different from three-platen one in closing system.Closing system of two-platen die casting machine is made of plate of the fixed half and plate of the moving half.The locking device includes a split nut and a locking hydraulic cylinder.The split nut can realize close and open function.The teeth of the nut are engaged with the teeth on the tie bar when the nut is closed.The locking cylinder is a thin-walled hydraulic chamber,and it can expand to lock the die.  
        关键词：Two-platen Die Casting Machine;Closing System;Locking Mechanism   
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      • Li Shuyu1,Tian Fuxiang2
        Vol. 31, Issue 4, Pages: 335-337(2011)
        摘要：A practical die-casting die structure for a complex part with two cross-inclined holes was presented,and its operation principle of the die and key points of the design were designed.The die with axle-rack cross loose core structure resolved the problems in two cross-inclined holes molding and loose core.  
        关键词：Die Casting Die;Cross-inclined Hole;Rack;Loose Core   
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      • Ye Siyou,Fan Hongxun,He Hanjun
        Vol. 31, Issue 4, Pages: 337-338(2011)
        摘要：To reduce machining volume of the hot forging mould and save tool steel,H11 steel hot forging mould was produced by squeezing casting.Rational mould structure of squeezing casting forging mould and its optimized parameters were presented.Combination structures were adopted on the punch-pin and the cavity mould to take out workpiece easily.The results verified that produced squeezing casting hot forging mould met the requirements in size and properties,decreasing 1/3 machining time and machining cost.  
        关键词：H11 Steel;Forging Mould;Squeezing Casting;Mould Structure   
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      • Liu Zunjian
        Vol. 31, Issue 4, Pages: 339-342(2011)
        摘要：The failure types and formation of die casting die were analyzed.Factors influencing service life of die casting die and countermeasures were presented from some aspects,such as tool materials,heat treatment,design,manufacturing,die casting process,operation,mould use and maintenance.  
          
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      • Zhao Yang1,Qu Jia2,Wang Ligang1,Tian Hongchao2,Zhang Hu1
        Vol. 31, Issue 4, Pages: 343-345(2011)
        摘要：A new pressure control system for differential pressure casting was developed by modular design.The modular design system,which is divided into relatively independent modules for meeting the reguirements of the various function to achieve,has a clear structure.Fixed joint was used to link modules.The software exhibits easy operation.Independent modules and fixed joint ensure accessibility and scalability,reducing the difficulty of development and post-maintenance,meanwhile,it makes the computer control system stable and a reliable operation,so it is easier to implement various types of special requirement of users.The differential-pressure casting control system based on the software can realize the control and monitoring of the full-process.The system passed the practical testing and was applied.  
        关键词：Differential Pressure Casting;Automatic Control;Computer Software;Modular Design   
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      • Liu Ming1,Jiang Weiguo2,He Hongtao1,Ren Xingfu1
        Vol. 31, Issue 4, Pages: 345-347(2011)
        摘要：Double-turbine blade with complicated hollow structure was produced by investment casting.The results indicate that process of ceramic core making is simplified apparently by adopting silicon based ceramic core and assembling quartz tube,so quality of ceramic core is improved also.The qualified double-turbine blade with complicated hollow structure was manufactured with the ceramic core.  
        关键词：Superalloy;Turbine Blade;Investment Casting   
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      • Du Ruichang,Shao Kangzhen,Wu Xianlong
        Vol. 31, Issue 4, Pages: 348-349(2011)
        摘要：Investment casting small stainless beer valve body was conducted.Wax pattern was designed according to the structure characteristics of the valve body.Through optimizing processing parameters,casting defects in the castings were decreased or eliminated,obtaining high-quality,high-precision and high-added value valve body.  
        关键词：Stainless;Beer Valve;Investment Casting;Processing Parameters;Casting Defects   
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      • Xiao Xiaofeng1,Xue Qiong3,Fan Zhiliang2
        Vol. 31, Issue 4, Pages: 350-352(2011)
        摘要：Key technologies of LFC（lost foam casting） patterns for different types components were described,focusing on tube joint and valve body with complicate curvature.Based on UG modeling & manufacturing software,use notes in three dimensional modeling,pattern design and PLC process were discussed.Some available ways were presented.  
        关键词：Foam Pattern;LFC;Curvature Modeling;CAD/CAM   
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      • Chen Shuying,Yue Xudong,Chang Guowei
        Vol. 31, Issue 4, Pages: 353-356(2011)
        摘要：Surface crack and its formation mechanism of horizontal continuous casting billets produced with copper scrap were analyzed.With decreasing in diameters of the billets,surface crack which is mainly distributed into the upper of the billets is increased.The major crack with relatively round-obtuse tip and a little sharp tip are in range of 0.3～0.5 mm in depth,and the deepest crack reaches 4 mm,meanwhile,intergranular crack around crack tip can be observed.There exists inclusion including SiO2 and Al2O3 in crack.Formation mechanism of crack on the billets was analyzed based on solidification theory.It is believed that surface crack on the billets is mainly related to the incorrect secondary cooling process.Through using annular feed-water injector in secondary cooling process,surface crack is eliminated,improving greatly the quality of the billets.  
        关键词：Horizontal Continuous Casting;Copper Scrap;Crack;Solidification   
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      • Zhai Shenqiu
        Vol. 31, Issue 4, Pages: 357-359(2011)
        摘要：Structure improvement has been made on the mechanical vibration of the small vertical centrifugal machines.A pair of tapered roller bearings was used for the main loaded bearing in order to improve the rotation accuracy and to reduce the machine vibration.The fixes of the parts on the axis have been also improved to prevent the channeling movement.Cooling sleeve was set to improve the heat dissipation of the bearing and play the role in bearing installation.In addition,the design calculation has been made for the main axis and the related parts.Practical production verifies that the improved structure design is feasible.  
        关键词：Centrifugal Casting;Cylinder Sleeve;Centrifugal Machine   
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      • Ai Taotao
        Vol. 31, Issue 4, Pages: 360-362(2011)
        摘要：TiC/Ti3AlC2 composites were prepared by in-situ synthesis in 2TiC-Ti-Al system.Phase constituent and microstructure of the reactive products at different synthesized temperatures were observed by XRD（X-ray diffraction） and SEM（scanning electron microscope）,and its density and compressive strength were measured.The results reveal that with increasing in reactive temperature,Ti3AlC2 phase content is decreased and TiC phase content increased,meanwhile,lamellar or layered Ti3AlC2 phase is decreased and larger TiC particle is greatly increased.With sintering at 1350℃,Ti3AlC2 phase content is higher,and density and compressive strength of the composites reach 4.03g/cm3 and 111.29MPa,respectively.  
        关键词：Ti3AlC2 Phase;TiC Phase;Preparation;Properties   
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      • Zhang Yangui,Cheng Hefa,Huang Xiaomei,Wu Jin,Hu Zhijun
        Vol. 31, Issue 4, Pages: 363-366(2011)
        摘要：SiCp/ZL105 composites were fabricated by ultrasonic vibration diluting high SiC volumetric fraction SiCp/ZL105 preforms which was prepared by pressure infiltration process.Effects of ultrasonic vibration processing parameters on microstructure and performance of the composites were investigated.The results reveal that SiC volumetric fraction can reach up to 55%～60% in pressure nitrated preforms,and SiC volumetric fraction in SiCp/ZL105 composites prepared by ultrasonic vibration diluting preforms can reach up to 9%～23%,in which uniformly dispersed SiC particle exhibits desirable bonding with the matrix.With increasing in SiC particles,hardness and wear resistance of the composites are obviously improved.  
        关键词：SiCp/ZL105 Composites;Pressure Infiltrating Process;High-intensity Ultrasonic;Microstructure;Hardness;Wear Resistance   
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      • Chen Dahui1,Huang Wenshu2,Tang Jinjun1,Hou Liqun1,Fei Liangjun1
        Vol. 31, Issue 4, Pages: 367-368(2011)
        摘要：Effects of different Cu,Mg contents,such as Cu in 3.0%～3.8% and Mg in 0～0.4%,on mechanical properties of sand casting Al-Si-Cu-Mg alloy were investigated by tensile testing.The results reveal that minor Mg content（0.2%～0.3%） can effectively improve the strength of the alloy.Ambient tensile strength and elongation of the alloy containing 3.5% Cu and 0.3% Mg reach up to 355MPa and 5%,respectively.  
        关键词：Al-Si-Cu-Mg Alloy;Mechanical Properties;Cu;Mg   
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      • Li Shicheng,Chen Yungui,Xiao Sufen,Tang Yongbai,Wang Qing,Zhao Yuanhua,Ding Wucheng
        Vol. 31, Issue 4, Pages: 369-372(2011)
        摘要：As-cast microstructure and ambient mechanical properties of Mg-5Sn with different Sn additions（as 0,0.3%,1.0%,1.5%,2.0% and 3.0%） were investigated by SEM（scanning electron microscope）,EDS（energy dispersive spectrometer） and XRD（X-ray diffraction） as well as tensile testing,meanwhile,the creep behavior of the alloy was examined with loading of 35 MPa at 175℃.The results reveal that with Sr addition,MgSnSr heat resistant phase with rod and acicular shape can be observed in the Mg-5Sn alloy.With increasing in Sn addition,numbers of MgSnSr phase are increased,and Mg2Sn phase content is decreased.Ambient mechanical properties of the Mg-5Sn alloy can be improved with Sr addition,which is attributed to the refining effects of minor Sr on grain size and dispersed strengthening effects of MgSnSr phase.When Sr addition is 0.3%,tensile strength and elongation of the Mg-5Sn alloy reach 165MPa and 10.4%,respectively,exhibiting desirable mechanical behavior.In addition,heat resistance of the Mg-5Sn alloy can be greatly improved with increasing in Sr contents.Steady creep rate of the alloy with 3% Sr addition is decreased by approximately 50%.  
        关键词：Magnesium Alloy;Mg-Sn-Sr Alloy;MgSnSr Phase;Compression Creep   
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      • Wu Jin1,Cheng Hefa1,Huang Xiaomei1,Zhang Yangui1,Hu Zhijun1
        Vol. 31, Issue 4, Pages: 373-376(2011)
        摘要：The ZL101 open-cell aluminum alloy foams were fabricated by pressure-infiltration with the matrix made by the soluble gypsum blocks,and then the aluminum alloy foams were treated by modification and T6 treatment.Effects of these treatments on energy-absorption capacity and energy absorption efficiency were investigated by the quasi-static compression testing.The results show that porosity of the aluminum alloy foams reach 89.3%～90.7%.Strength of the open-cell aluminum alloy foams can be effectively improved by modification and heat treatment,and high specific strength of open-cell aluminum alloy foam with specific strength of 2.2 and approximately 85% energy-absorption can be obtained.  
        关键词：Open-cell Aluminum Alloy Foam;Modification;T6 Heat Treatment;Energy Absorption Capacity;Energy Absorption Efficiency   
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      • Wang Jin,Zhong Hong,Zhang Tiebang,Kou Hongchao,Hu Rui
        Vol. 31, Issue 4, Pages: 376-379(2011)
        摘要：Effects of Mo on the solidification structure and solidification route of high Nb-TiAl alloy prepared by a non-consumable arc melting furnace in an argon atmosphere were analyzed.The results reveal that solidification route is changed and solidification structure is refined in Ti-46Al-6Nb-0.2B alloy with Mo addition.With 1% Mo addition,solidification structure of the alloy is composed of α2 phase and γ phase as well as minor β phase,and major β phase is segregated along the grain boundary as network structure,and the minor one is distributed in lamellar colony as strip structure.With increasing in Mo addition,β phase is increased.Based on phase diagram,solidification route of the high Nb-TiAl alloy with different Mo content was presented.  
        关键词：TiAl Alloy;Mo Alloying;Solidification;Structure Refinement   
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      • Song Wei1,Wang Liandeng1,Chen Xiao1,Chen Yonglu3,Li Qiuju1
        Vol. 31, Issue 4, Pages: 380-384(2011)
        摘要：Al-Ti-C-Ce master alloy was prepared with K2TiF6,graphite powder,rare earth oxide Ce2O3 and commercial pure aluminum as raw materials,and microstructure of the master alloy is observed by OM（optical microscope）,XRD（X-ray diffraction）,SEM（scanning electron microscope） and EDAX.Meanwhile,effects of self-developed Al-Ti-C-Ce master alloy and imported Al-Ti-C-Ce master alloy on grain size and mechanical properties of 7010 aluminum alloy were analyzed.The results show that grain size in 7010 aluminum alloy is greatly refined,and tensile strength and elongation of the alloy are obviously improved with Al-Ti-C-Ce master alloy refinement.  
        关键词：Aluminum Alloy;Master Alloy;Tensile Strength;Elongation   
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      • Vol. 31, Issue 4, Pages: 379(2011)
        摘要：<正>美国铸造协会（简称AFS）与位于美国华盛顿特区的全国工业砂协会（简称NISA）于近期探索建立一家新的技术研究联合机构,主要致力于研究砂型铸造技术的进一步发展以不断提高铸件的精准度与创新能力。  
          
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      • Vol. 31, Issue 4, Pages: 390(2011)
        摘要：<正>"今后黄铜标价要以盎司计算,不应该以吨为标尺了,应比肩黄金价格"。去年年底伦敦金属交易所（LME）铜价突破9000美元大关后,这句业内的笑谈如今再被提及,原因是,兔年伊始,伦敦铜价格继续保持上涨态势,突破每吨1万美元。  
          
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      • Zou Bin1,Zhou Wenlong1,Hu Jianjun1,Chen Guoqing1,Sun Zhonggang1,Ma Hongjun1
        Vol. 31, Issue 4, Pages: 384-387(2011)
        摘要：Smelting-casting technology for Cu-Cr-Zr alloy under air atmosphere was analyzed.Effects of cover agent and de-oxidizer agent on oxide-burning rate and yield rate of alloying elements were investigated。 The results reveal that it is an effective way to improve the yield rate of alloying elements using Cu-Cr and Cu-Zr master alloy and de-oxidize with Cu-Mg master alloy.By using charcoal,graphite chip and a kind of special compound cover agent to protect and control alloy composition,a stable yield rate of alloying elements can be realized in holding time of 4～5 hours,where the yield rate of Cr and Zr reach 80%～90% and 60%～80%,respectively.Solid solution treated alloy exhibits compact structure with homogeneous distribution of Cr and Zr.The dominant phase is granular Cr and Cr2Zr,which are distributed in the matrix grains and grain boundaries.The large-tonnage continuous casting Cu-Cr-Zr alloy ingot can be produced successfully by smelting-casting under air atmosphere.  
        关键词：Cu-Cr-Zr Alloy;Smelting-casting;Cover Agent;Yield Rate   
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      • Ye Binmin,Zhang Weiqi
        Vol. 31, Issue 4, Pages: 388-390(2011)
        摘要：Qualification rate of SCR copper rod production was improved through using practical experience from continuous casting and rolling SCR copper rod.Aiming at factors influencing rolling qualification rate of copper rod,some processing parameters,such as power,torque,rolling speed,gap,were optimized.Through strictly controlling processing parameters including rolling temperature,flow,velocity,desirable melt match,oxygen content in copper melt,qualification rate of the copper rod production was improved.  
        关键词：SCR Copper Rod;Rolling System;Optimization of Rolling Match;Qualification Rate   
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      • Vol. 31, Issue 4, Pages: 391(2011)
        摘要：<正>20110401浅井宏一.动力系统的进展与汽车轻量化的动向及对铸造技术的期待.铸造工学,2010,82（7）:407-413.混合动力、电动汽车搭载的电机、转换器、电池等新的动力系统与发动机引擎、变速箱不同,有关其材料、生产技术尚未确定的事例不在少数,因此高品质、低成本的生产技术开发是必要  
          
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      • Vol. 31, Issue 4, Pages: 392(2011)
        摘要：<正>20110401陶瓷颗粒增强复合耐磨件及其制造方法,CN101898238A,2010.12.01,西安交通大学;广州有色金属研究院.本发明涉及一种陶瓷颗粒增强复合耐磨件及其制造方法,将陶瓷颗粒与金属粉混合均匀,填充于特定的模具中,将陶瓷颗粒和金属粉连同模具一起放入真空烧结炉内进行烧结,金属  
          
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