最新刊期
      卷 31 ， 期 8 ， 2011
      • Vanluu Dao~1,Zhao Shengdun~1,Lin Wenjie~1
        Vol. 31, Issue 8, Pages: 687-690(2011)
        摘要：Semi-solid casting（thixo-die casting） instead of conventional die casting was used to produce box-type parts for automobile.Model of semi-solid die casting was established based on power cut-off（PLCO） model and Procast 2008 to simulate the effects of processing parameters on deformation process.The results show that quality of semi-solid casting box-type parts are obviously related with pouring temperature,punching velocity and heating temperature of the mould.Furthermore,optimized processing parameters were presented.  
        关键词：Semi-Solid Die Casting;Box-type Parts;ProCAST;PLCO;Numerical Simulation   
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      • La Peiqing,Liu Xuemei,Lu Xuefeng,YangYang,Wang Li,Chen Jingmin
        Vol. 31, Issue 8, Pages: 691-695(2011)
        摘要：Effects of argon pressure and attenuant on microstructure and mechanical properties of bulk nano-crystalline Fe3Al prepared by thermit reaction in condition of different pressure of 3,6,9MPa and attenuant contents of 0,20% and 40%were investigated by TEM（transmission electron microscope） and XRD（X-ray diffraction） and compression testing.The results reveal that crystal structure of the bulk Fe3Al materials prepared belongs to DO3 order with the grain size less than 30 nm.Grain size of the prepared materials is almost independent of the argon pressure,however,with increasing in attenuant content,the grain size is greatly decreased.In addition,yield strength of the prepared materials is improved with pressure increase,however,it is absent of the observed function with grain size.With different attenuant content,an anti-Hall-Petch rule is followed between the grain size and the yield strength.  
        关键词：Bulk Nano-crystalline;Thermit Reaction;Attenuant;Argon Pressure   
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      • Yao Chenggong~1,Yuan Shouqian~1,Chen Lie~2,Wang Zhijun~1
        Vol. 31, Issue 8, Pages: 695-698(2011)
        摘要：Internal corner-crack in continuous casting 40Cr billets produced by basic oxygen furnace-LF refinery-continuous casting from a factory was analyzed from processing procedure and continuous casting equipment as well as observing microstructure by hot hydrochloric acid,metallographic microscope,and electron probe-energy spectrum analysis.It is found that there is absent of abnormal microstructure and particle segregation around the defects.Solidification process of continuous casting mould was simulated by the Anysys software.The results show that the internal corner-crack is generated in the mould during solidification process,which is attributed to the formation of apparent hot spot zone at the off-corner of the billet resulted from unevern heat flow in the mould resulting in the formation of thermal stress.The defects are related with the composition of liquid steel,optimization of processing parameters as well as transition fillet.Through strictly controlling processing parameters and optimizing design of transition fillet on mould,the internal corner-crack less than 1.0 level is controlled to 89.68%.  
        关键词：40Cr;Continuous Casting;Internal Corner-crack;Mechanism;Processing   
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      • Yi Yong~1,Wang Yuansheng~2,Fan Hongyuan~2,Xiong Ji~2,Wang Jun~2
        Vol. 31, Issue 8, Pages: 699-702(2011)
        摘要：Through measuring hardness and magnetic behavior of high chromium cast iron（3Cr14Mn4B）,microstructure and hardness change of the cast iron after sub-critical,destabilized and cryogenic treatment were examined to understand the effects of retained austenite and martensite on hardness of the cast iron.The results show that the microstructure of the high chromium cast iron is composed of martensite,a small amount of austenite and（Cr,Fe）7C3 eutectic carbide.In the condition of sub-critical treatment,the hardness of the cast iron is firstly increased and then decreased with increasing in sub-critical treating temperature at air cooling,which is lower than that of one at cryogenic treatment,however,it is higher than that at cryogenic treatment with sub-critical temperature more than 550 ℃.The hardness of the cast iron is slightly increased with destabilized temperature increase,which is higher at cryogenic treatment than that at air cooling.After different heat treatment,hardness of the high chromium cast iron is controlled by martensite content in cast iron matrix and carbide content in martensite phase.The optimized heat treatment process is sub-critical treatment at 550 ℃.  
        关键词：High Chromium Cast Iron;Sub-critical Treatment;Destabilized Treatment;Cryogenic Treatment;Hardening Behavior   
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        发布时间：2023-12-18
      • Vol. 31, Issue 8, Pages: 698(2011)
        摘要：<正>世界金属统计局（WBMS）6月22日公布的数据显示,2011年1～4月,全球锡市供应过程剩77吨。但WBMS未提供去年同期的比对数据。2011年1～4月,全球精锡产量较去年同期增加10300吨（不包括LME再加工）,全球锡需求量  
          
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      • Vol. 31, Issue 8, Pages: 709(2011)
        摘要：<正>根据美铝公司7月1日的相关报道,作为B&C科研项目2100万美元扩建计划和公司交通产品贸易计划的一部分,美铝公司将建造一条更先进的废铝回收生产线,旨在减少能源消耗和降低碳排放量。美铝的这项新投资将新增30个就业机会  
          
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      • Vol. 31, Issue 8, Pages: 717(2011)
        摘要：<正>随着终端用户的发展,未来5年钛资源需求将稳步上升,而钛原料的日益紧缺将导致钛业供应逐渐不能满足需求的增长。钛金属主要生产商RTI国际金属公司预计,今年全球钛资源需求将达3.07亿镑,而到2015年将再增加30%到3.99亿镑。其  
          
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      • Vol. 31, Issue 8, Pages: 733(2011)
        摘要：<正>汇丰银行6月28日称,鉴于超过一半的白银和铂系金属的实物消费是由工业需求所消化,因此工业活动增长的放缓对白银市场的冲击可能要超过对铂系金属的冲击。该银行表示,白银的工业应用十分普遍,制造业增长的整体放缓将使得  
          
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      • Vol. 31, Issue 8, Pages: 739(2011)
        摘要：<正>据国外传媒6月30日报道,俄铝联合公司将在Novokuznetsk铝冶炼厂实施废料回收技术,回收费用全部由当地环境部门（ERC）资助。俄铝公司表示,已经与Kemorovo政府和ERC签署协议,由Novokuznetsk铝冶炼厂回收3000万吨废活性炭电解槽。  
          
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      • Vol. 31, Issue 8, Pages: 743(2011)
        摘要：<正>国际铸造业最具主导地位和影响的行业盛会——国际铸造展览会暨技术论坛（GIFA）及国际铸件展览会（NEWCAST）于2011年6月28日至7月2日在杜塞尔多夫展览中心举行,吸引了来自80多个国家和地区的7万多名观众。圣泉集团公  
          
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      • Vol. 31, Issue 8, Pages: 761(2011)
        摘要：<正>美国CRU的分析师、高级顾问克里斯汀·梅尔顿5月17日称,2013年全球铜产量将会增加,导致铜供应过剩,并打压铜价。原因是2012年和2013年北美和澳大利亚的新铜产能将投产。梅尔顿称,中国和其他发展中国家将是需求的  
          
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      • Vol. 31, Issue 8, Pages: 782(2011)
        摘要：<正>日前,商务部发布《美国目前在实施的对华贸易救济措施涉案产品一览表》,据统计,截止2011年5月底,美国共对中国出口的9种有色金属及铁合金产品进行反倾销、反补贴措施。据了解,美国对中国实施贸易救济措施的涉案产品共有112种,其中有铝挤压材、无缝精炼铜管、硅金属、  
          
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        发布时间：2023-12-18
      • Li Li~1,Wang Cuifang~2
        Vol. 31, Issue 8, Pages: 702-705(2011)
        摘要：With the help of numerical simulation method,filling and solidification process of magnesium alloy bottom-shell body for automobile in liquid state and in semi-solid state were simulated,and potential position of defects in the parts in two different states was predicted.The results show that semi-solid magnesium melt is beneficial for smoothly filling cavity and exhaustion of gas in the cavity in time to eliminate the internal defects in the parts.Meanwhile,the whole temperature field of the parts is relatively homogeneous,which is helpful for the internal feeding and exhaustion of residual gas in the cavity,improving the quality of the magnesium alloy parts.  
        关键词：Magnesium Alloy;Semi-Solid Slurry;Numerical Simulation   
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        发布时间：2023-12-18
      • Wang Liang,Cui Xiaochao,Zhang Junting,Cai Ming,Li Bing
        Vol. 31, Issue 8, Pages: 706-709(2011)
        摘要：Considering some parameters such as composition undercooling,curvature undercooling and anisotropy of interfacial energy,Cu dendritic growth was simulated by finite volumetric method coupling with cellular automaton method,and calculation of interfacial advancing and solute diffusion was modified.The simulated results show that dendritic morphology and dendritic growth velocity are obviously dependent on the undercooling and solute concentration,especially liquid phase solute diffusion coefficient on dendritic growth.  
        关键词：Dendritic Growth;Cellular Automaton;FVM   
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        发布时间：2023-12-18
      • Ding Lin~1,Zhu Xiuchuan~1,Li Mingxi~2
        Vol. 31, Issue 8, Pages: 710-714(2011)
        摘要：Laser cladding Co-based alloy on surface of the brass was carried out by pre-deposited method.A three-dimensional finite element model for temperature was established,where the effects of temperature on thermo-physical parameters and surface convective heat transfer as well as radiant heat transfer were taken into account.The temperature field and stress field of laser cladding Co/Cu alloy were analyzed by the SYSWELD software.The results show that temperature field exhibits the tendency of non-steady state to steady state during the laser cladding process,and peak temperature of different points was reduced with serrated tendency at cross section of the cladding surface,and maximum residual stress can be observed in the middle layer of cladding surface nearby the matrix alloy.The desirable metallurgical boding with 11.5% dilution can be realized by scanning speed at 8 mm/s with the same other parameters,which is validated by the experiment.The acceptable powers of 2.96kW and 3.82kW are presented with scanning velocity of 6 mm/s and 10 mm/s by SYSWELD check.The results provide a reference for parameter optimization and control of dilution rate of laser cladding layer.  
        关键词：Laser Cladding;SYSWELD Software;Brass;Temperature Gradient;FEM   
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        发布时间：2023-12-18
      • Xu Yiwu~1,Guan Wenhao~2,Ma Hongliang~2
        Vol. 31, Issue 8, Pages: 715-717(2011)
        摘要：There exist shrinkage hole and gas hole in crack location of a wiper arm head during fatigue testing.Mould design of the produced parts was analyzed by the help of CAE software.The origination of defects was presented,and countermeasures were provided.Optimized design was obtained through modifying mould and simulation to be implemented on the production.Absence of crack was observed through fatigue testing,improving the quality of product.  
        关键词：Casting CAE;Die Casting;Mould Design   
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      • Vol. 31, Issue 8, Pages: 705(2011)
        摘要：<正>7月28日,东风日产发动机产能扩建项目奠基仪式在广州花都汽车城赤坭园区隆重举行。东风日产继2010年5月8日奠基花都第二工厂、2010年扩充纳入郑州新工厂整车产能后,目前形成了花都、襄阳、郑州三地四工厂的整车生产格局,2015年计划达成140万台的制造产能。  
          
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        发布时间：2023-12-18
      • Vol. 31, Issue 8, Pages: 714(2011)
        摘要：<正>宁波市模具行业经过"十一五"期间的快速发展,其总体规模、技术水平、生产装备、经营管理都有了很大地提高。目前宁波市规模以上模具企业（且模具为主业）家数近100家,资产总计近50亿元,年均增长80%以上,年均实际增幅40%;销售收入20亿元以上。  
          
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      • Vol. 31, Issue 8, Pages: 726(2011)
        摘要：<正>近日,贵州省副省长孙国强到贵州科学院调研"高新技术产业创新基地"项目进展情况,并与有关部门和企业就合作推动高强度铝合金项目产业化进程进行座谈。他强调,各部门和相关地方政府要把高强度铝合金项目作为贵州省高新技  
          
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      • Vol. 31, Issue 8, Pages: 730(2011)
        摘要：<正>目前,随着新兴重工、高合金铸管、西班牙高档汽车配件等一批铸造和装备制造高端项目相继落户投产,鸡泽县铸造和装备制造企业纷纷向高端转变已日见雏形。集群发展。铸造业是该县传统的四大主导产业之一,随着市场经济发展,该县对其进行了及时重新定位升级为铸造和装备制造业,并规划建设了铸造和装备制造园区,以小寨镇铸造企业群为基础,规划建设了3.2平  
          
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      • Vol. 31, Issue 8, Pages: 746(2011)
        摘要：在嘉禾县台办盛情邀请下,广州市台商协会副会长姚居福先生,自今年4月份开始与其子姚文添,多次来嘉禾县进行商业考察,经多次实地考察论证,姚居福先生决定在嘉禾投资2600多万元兴办一个高科技精加工铸造厂——瑞建公司铸造厂,  
          
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      • Zhang Jun,Kang Yonglin,Zhang Fan
        Vol. 31, Issue 8, Pages: 718-720(2011)
        摘要：In order to determine the best parameters to obtain the optimized mechanical properties of rheo-die casting A356 alloy parts,effects of pouring,rotating speed of inner barrel and shearing temperature on the mechanical properties of the rheo-casting parts were investigated by means of self-developed taper barrel rheo-moulding machine with orthogonal testing.The results show that tensile strength of the parts is mainly controlled by pouring temperature,and elongation is mainly dependent on the shearing temperature.Tensile strength and elongation of the rheo-die casting A356 semi-solid alloy parts can reach up to 271 MPa and 7.3%,respectively,with pouring at 655℃ and shearing at 600 ℃,shear speed is 5 000/s.  
        关键词：TBR;Semi-solid;A356 Alloy;Mechanical Properties   
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        发布时间：2023-12-18
      • Vol. 31, Issue 8, Pages: 720(2011)
        摘要：<正>《铸造材料手册》从实用出发,着重介绍了我国最新修订的铸造材料现行技术及行业标准。是一部专业工具书。分为钢铁料篇、铁合金篇、有色金属篇、耐火材料篇、炭素材料及焦炭产品篇和造型材料篇。《世界铸造材料手册》  
          
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      • Geng Jiarui,Xue Tao,Nie Dengpan,Wu Subin,Wu Jian
        Vol. 31, Issue 8, Pages: 721-724(2011)
        摘要：Effects of Ce on microstructure and mechanical properties of ZnAl4 alloy modified by Ce were investigated.The results show that with 0.5% Ce addition,microstructure of die casting ZnAl4 alloy is refined,where eutectic zone is increased.However,with Ce content more than 0.5%,comprehensive properties of the alloy are deteriorated as a result of the creation of Al4C3 phase.The alloy with 0.5% Ce modification was employed to produce carburetor.The production verified that the die casting behavior of the modified alloy is obviously improved,and air-tightness of the carburetor is greatly improved.  
        关键词：ZnAl4 Alloy;Re Ce;Modification Treatment;Mechanical Properties   
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      • Dai Wei,Zhao Binghua,Li Shan,Zhuang Zheng,Yuan Jing
        Vol. 31, Issue 8, Pages: 724-726(2011)
        摘要：Problems in initial technology and in mould for producing throttle valve were analyzed.Improvement of the initial technology and mould was carried out,and the problems were resolved.  
        关键词：Throttle Valve with Double Cavity;Die Casting Die;Die Casting   
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      • Chen Xuemei,Huang Yao,Wang Leigang
        Vol. 31, Issue 8, Pages: 727-730(2011)
        摘要：According to the structural feature and technological characteristics of AC4B aluminum alloy crankcase-lower bedplate,low pressure casting GM-L850 automobile engine crankcase-lower bedplate and its mould design were described.The processing parameters were adopted as follows:filling pressure of 0.02 MPa,approximately 0.5 m/s filling velocity and 5 s filling time,holding pressure of 0.051 MPa for 90s,pouring at（720±10） ℃,and pre-heating mould at 220 ℃ as well as pouring basin temperature of（600±50） ℃.Multi-parting face was adopted in the mould design to ensure the mould-opened smoothly.Mould wall thickness should be rationally considered,in which local cooling was employed at the thick location to realize the heat balance of the mould,meanwhile,various exhausting ways were adopted in the mould design to fill completely.The production shows that the process scheme,parameters and mould structure were feasible,and high qualified production rate was realized.  
        关键词：Aluminum Alloy;Crankcase-lower Bedplate;Low Pressure Die Casting;Mould   
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        发布时间：2023-12-18
      • Huang Zhiyuan~1,Wan Li~2,Zhang Baizai~1,Chen Liang~1,Chi Xiaoqin~1,Chen Yiting~1,Yu Liang~1,Xu Feiyue~1
        Vol. 31, Issue 8, Pages: 731-733(2011)
        摘要：Distortion is one kind of main defects occurred in the aluminum alloy die castings,which is difficult to fully be eliminated.Rectification is a key method to relieve the distortion of aluminum alloy die castings.A new hot rectification technology suitable for aluminum alloy die castings was developed to overcome the problems in low efficiency,high intensity and wicked environment in manual rectification condition.The distortion of the aluminum alloy parts can be effectively decreased by hot rectification combining with water cooling after ejection from the die,fully meeting the machining demand.The technology exhibits the advantages of high efficiency,low working intensity and low environmental noise.  
        关键词：Die Casting;Aluminum Alloy;Distortion;Hot Rectification   
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        发布时间：2023-12-18
      • Xia Jiansheng,Dou Shasha
        Vol. 31, Issue 8, Pages: 734-736(2011)
        摘要：The orthogonal testing of four factor-three levels,such as chamber diameter,filling rate,punching velocity,and acceleration in cold chamber die casting machine was carried out.Effects of different parameters on liquid aluminum alloy flow behavior in chamber were visualized by Flow-3D software.The results show that punching velocity is the dominant factor.  
        关键词：Die Casting;Aluminum Alloy;Simulation   
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      • Cheng Lu~1,DongXuanpu~1,Ma Rong~1,Chen Shuqun~1,Feng Yanli~2
        Vol. 31, Issue 8, Pages: 736-739(2011)
        摘要：Effects of mixed filler of high bauxite and quartz on the properties of gypsum mixture were investigated to determine the rational proportion of gypsum and filler.And then several additives such as polycarboxylic acid type water-reducer,MgSO4,Na3PO4,and CO（NH2）2 were added into the gypsum mixture to improve its properties.Meanwhile,the pouring experiment was implemented.The optimal proportion was obtained by the experiment.The proportion of gypsum and filler is 1:1,and water-reducer addition,MgSO4 and Na3PO4 are 1.0%,20%,0.1%0.15%,respectively,and proportion of CO（NH2）2 and gypsum is 1:10.The pouring experiment show that the designed gypsum mould can be suitable for producing the magnesium alloy parts with excellent quality.  
        关键词：Magnesium Alloy;Investment Casting;Easy Collapse;Gypsum Mould   
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      • Fan Xiuqian,Zhang Xinjun
        Vol. 31, Issue 8, Pages: 740-743(2011)
        摘要：PASX410 flow divider is made of SUS440 stainless steel,whose shape is hollow ring structure with eight ribs and eight holes in the inner,exhibiting complicated shape.Wax pattern with CO（NH2）2 core shows low production rate and high waste rate.Wax pattern structure was re-designed.Up-part and down-part of the wax pattern were made,respectively,and then they were assembled together.Special designing and manufacturing method was adopted to ensure the location accuracy and interchangeability of up-part and down-part pattern.Through using wax solvent and repairing agent in wax assembling,assembling reliability and precision were ensured.In addition,mold shell baking and pouring process were strictly controlled.Through above measures,investment casting PASX410 flow divider met the designed requirements.  
        关键词：PASX410 Flow Divider;Mould Design;Investment Casting   
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      • Guo Guangsi,Jia Weitao
        Vol. 31, Issue 8, Pages: 744-746(2011)
        摘要：Effects of adding sequence,stirring time,and stirring velocity on the self-developed LFC coating for aluminum alloy castings were investigated,and optimized adding sequence,stirring time and stirring velocity were presented to prepare the desirable coating.The pouring experiment was carried out to verify the coating efficiency.  
        关键词：Coating Preparation;Adding Sequence;Stirring Time;Stirring Velocity   
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      • Li Lixin,Li Zengmin,Tan Jianbo
        Vol. 31, Issue 8, Pages: 747-748(2011)
        摘要：The bridge bearing produced by EPC process could reduce its machining allowance and comprehensive cost.It is indicated that different pattern materials,pattern drying time and drying temperature,and negative pressure during pouring process,may influence the dimensional accuracy of the completed EPC bearing.Through keeping the compatibility of the process parameters,the dimension of the bridge bearing castings could be controlled in tolerance range.  
        关键词：EPC;Bridge Bearing;Dimensional Change   
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      • Gong Hui,Lu Dehong,Jiang Yehua,Zhou Rong,Wang Zhao
        Vol. 31, Issue 8, Pages: 749-753(2011)
        摘要：SiC/Al composite powder was prepared by high energy ball milling,and effects of milling time,process control agent（PCA）,the weight ratio of ball to powder as well as quantity ratio of SiC to Al on the granularity of composite powder and the cladding effects of Al on SiC were investigated.The results show that the average granularity size of composite powder is closely related to the PCA,the quantity ratio of SiC to Al,ball milling time,and the weight ratio of ball to powder,and influencing order is as follows:PCA>quantity ratio of SiC to Al >ball milling time>weight ratio of ball to powder.The average size of powders are decreased dramatically with the increase of ball milling time,PCA and the weight ratio of ball to powder,and it exhibits firstly increased and then decreased with increasing in quantity ratio of SiC to Al,reaching the minimum value as the quantity ratio of SiC to Al of 3 to 7.The composite powder with fine particle size and desirable cladding effects can be successfully prepared with 1.5% PCA,weight ratio of ball to powder of 12:1 and quantity ratio of SiC to Al of 3:7 and milling for 9 hours.  
        关键词：High Energy Ball Milling;Cladding;Composite Powder;PCA   
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      • Zhao Yu,Zhao Haidong,Dong Puyun
        Vol. 31, Issue 8, Pages: 753-756(2011)
        摘要：Suction casting SiCp/A356 metal matrix composites（MMCs）with 5% reinforced particles and A356 alloy were carried out,respectively.Temperature of castings and mould during filling and solidification process was measured to discuss the temperature variation of SiCp/A356 composites and A356 alloy castings and their moulds.The results show that SiCp addition can increase the temperature-decrement rate of SiCp/A356 composites before solidification and decrease the temperature-decrement rate after solidification.In addition,due to the difference of latent heat between the composites and the matrix alloy,the solidification transformation temperature of SiCp/A356 composites is lower than that of A356 alloy.  
        关键词：SiCp/A356 Composites;Temperature;Suction Castings;Solidification   
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      • Vol. 31, Issue 8, Pages: 756(2011)
        摘要：<正>时间:2011年9月22日地点:广东现代国际展览中心主办单位:中国机械工程学会及其铸造分会承办单位:中国机械工程学会铸造分会国家铸造行业生产力促进中心协办单位:北美压铸协会株式会社轻金属通讯AI社香港压铸及铸造业总会▲会议主要内容（1）由中国大陆、日本、韩国、印度、中国香港、中国台湾等  
          
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      • Huang Xiaofeng,Xie Rui,Feng Kai
        Vol. 31, Issue 8, Pages: 757-760(2011)
        摘要：Effects of Mn contents on microstructure and properties of Al-20Si-1.5Mg alloy were investigated by MFE3 optical microscope（OM）,universal tensile testing machine.The results reveal that,with Mn addition,grain size in the alloy is firstly decreased and then increased,and the mechanical properties of the alloy exhibit the similar tendency.The desirable mechanical properties can be observed with 0.5% Mn addition.  
        关键词：Al-20Si-1.5Mg Alloy;Mn Element;Microstructure;Mechanical Properties   
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      • Wang Xiaolin,Wang Lanfang,Zhu Zhongren,Zhang Duhuai,Ding Wuzhou,Dou Yongqing
        Vol. 31, Issue 8, Pages: 760-761(2011)
        摘要：Effects of HIP treatment on as-cast microstructure,tensile properties and impacting behavior of TC10 alloy were investigated.The as-cast microstructure of TC10 consists of α+β phase.The results indicate that HIP treatment has the greatly effects on β phase transformation.Grain size in β phase transformation is refined,and sub-α phase in grain is coarsened,which are responsible for the improvement of plasticity and impacting toughness and slight decrease of tensile strength.Elongation,shrinkage rate,impacting thoughness of the alloy are 18%,37%,450kJ/m2,respectively,increased by 157%,185%,165%,respectively.compared with htose of cast one.  
        关键词：Cast Ti Alloy;HIP;Microstructure;Properties   
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      • Liu Shuanjiang~1,Niu Yuqiang~3,Liu Zhongxia~2
        Vol. 31, Issue 8, Pages: 762-767(2011)
        摘要：At a given Ti content and Ti via B weight ratio,effects of different Ti and B adding ways on microstructure and mechanical properties of A356 alloy were investigated.The results show that the primary dendrite size in A356 alloy refined with Ti by electrolysis is smaller than that refined with Ti by melting Al-Ti master alloy or K2TiF6,and refining effects on A356 alloy by composite Ti and B is superior to that by only Ti.Tensile strength,yield strength and elongation of the A356 alloy refined by composite Ti and B are slightly higher than those refined by only Ti.Although effects of adding Ti and B ways on the strength of A356 alloy can be ignored,it exhibits great effects on plasticity.Strength of A356 alloy refined by electrolyte Ti is near to that refined by melting Al-Ti master alloys,and it is higher than that reined by K2TiF6,however,elongation is greatly higher than those by melting Al-Ti master alloy and by K2TiF6.  
        关键词：Adding Ti Ways;A356 Alloy;Microstructure;Mechanical Properties   
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      • Zhang Xiaoyi,Zhou Liaoqi
        Vol. 31, Issue 8, Pages: 767-770(2011)
        摘要：In order to improve the corrosion resistance of magnesium alloy surface,taking the Al powder as laser cladding materials,laser cladding Al coating on the magnesium alloy surface was carried out,and the cladding layer with gas-free and crack-free as well as desirable metallurgical bonding with the matrix on the magnesium alloy surface could be generated.Meanwhile,effects of laser parameters on microstructure of the cladding coating were investigated.  
        关键词：Laser Cladding;Al Cladding Layer;Microstructure   
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      • Chen Yuan,Li Xinwei,Luo Qiang,Jiang Wenhai,Cai Qizhou
        Vol. 31, Issue 8, Pages: 771-775(2011)
        摘要：A new type of Ti cladding nano-sized TiN（TiN/Ti）composite grain refiner was prepared by high energy ball milling,and effects of the prepared grain refiner on refining effects and anti-fading behavior of commercial pure Al were investigated.The results show that TiN/Ti composite refiner exhibits the excellent grain refining effects on commercial pure aluminum.With 0.025% addition,microstructure of the samples is transformed from coarse columnar grain into equiaxed one,and with 0.2% addition,average grain size in the pure Al reaches up to 82 μm.Average grain size reaches 101,153 and 327 μm in the samples with adding the composite refiner in the liquid Al at 725 ℃ for 30,60 and 120 min.Compared with pure Ti powder,TiN/Ti composite refiner exhibits excellent anti-fading behavior,which is attributed to the dispersion and stability of Ti cladding nao-size TiN in liquid Al.  
        关键词：TiN/Ti Composite Grain Refiner;Nano-sized TiN;Commercial Pure Aluminum;Grain Size;Anti-fading Behavior   
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      • Sun Wensheng,Zhang Jinlin
        Vol. 31, Issue 8, Pages: 775-777(2011)
        摘要：Apparent activation energy of eutectoid transformation in wrought ZA16 alloy was examined by thermal analysis with temperature-increment during squeezing casting.The relationship between thermal stability and microstructure evolution of the alloy after heat treatment was described.The activation energy and thermal stability of the alloy are decreased with the increase of deformation rate.After annealing treatment,the hardness of the as-cast alloy is reduced,and that of wrought alloy is obviously increased.The work-softening and annealing-hardening are observed in the deformed ZA16 alloy resulted from the broken coarsened grain during processing which allow more deformation rate to the material.Precipitated structure along the working direction after annealing treatment restrains the grain rotary in spheroidized structure for coordinated deformation,which is responsible for the annealed-hardening.  
        关键词：Zn Alloy;Thermal Stability;Activation Energy   
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      • Xiong Sanhua,Liu Qijun,Huang Jianping,Du Zhongwei
        Vol. 31, Issue 8, Pages: 778-779(2011)
        摘要：Based on the characteristics of Pb-bronze alloy（ASTMB584-938）and casting structure,a ustable gating system was designed,and proper moulding,smelting and pouring process were presented.Gravity segregation and gas hole in Pb-bronze during casting were eliminated,successfully producing the copper plate meeting the quality standard.  
        关键词：Pb-bronze;Copper Plate;Casting;Smelting   
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      • Chen Yisheng~1,Zhang Xuehui~1,Zhu Zhiyun~1,Yan Feng~1,Li Xiaoxian~2
        Vol. 31, Issue 8, Pages: 780-782(2011)
        摘要：The molten phosphate salt was used as a deleading agent to eliminate the lead in the impure copper.Effects of composition of deleading agent and holding time on deleading effects and microstructure of the impure copper were analyzed with the help of EDS（energy dispersive spectrum） and SEM（scanning electron microscope） and OM（optical microscope）,and its effects and mechanism were approached.The results show that lead in the impure copper can be effectively reduced by adding proper molten phosphate salt deleading agent,and with ratio of 3,the deleading efficiency reaches up to 90%,meanwhile,the other impurities are obviously decreased.In addition,the microstructure of the impure copper is greatly improved.  
        关键词：Impure Copper;Lead-removal;Phosphate Salt   
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      • Vol. 31, Issue 8, Pages: 783-784(2011)
          
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      • Vol. 31, Issue 8, Pages: 785(2011)
        摘要：<正>20110801座间淳志,吉田诚.铝合金凝固裂纹的理论及判据综述（1990年代以前）.铸造工学,2010,82（9）:583-589.按年代顺序（1940～1990年）归纳了铝合金凝固裂纹理论及生成判据的研究成果。（1）1960年代以前。许多研究者已指出,在凝固温度区间存在一个容易出现凝固裂纹的温度范围,该温度范围越宽,合金的凝固裂纹倾向越严重。1947年Singer探讨了Al-Si二元合金高温拉伸试验与凝固裂纹之间的关系。他将固相线与形成拉伸强度的边界线之间的温度范围定义为高温脆  
          
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      • Vol. 31, Issue 8, Pages: 786(2011)
        摘要：<正>20110801一种连铸中间包干式工作衬的制备方法,CN101905315A,2010.12.08,河北理工大学.本发明涉及一种连铸中间包干式工作衬的制备。其技术方案是:按质量分数将90%～95%的镁砂或镁橄榄石与5%～10%的乳糖或麦芽糖混合,搅拌均匀后采用模胎振动成形,在200～400℃烘烤,脱模后得到中间包干式工作衬。其中镁砂或  
          
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