最新刊期
      卷 35 ， 期 10 ， 2015
      • Cao Jiangdong,Li Bingding
        Vol. 35, Issue 10, Pages: 1009-1012(2015) DOI: 10.15980/j.tzzz.2015.10.001
        摘要：Effects of pulse magnetic field pretreatment on the structure and the crystallization process of amorphous alloy（Fe74Ga2P9.65B4.6Si3C6.75）98Nb2 were investigated by XRD and DSC.Furthermore,the magnetic properties were also analyzed by VSM.The results show that after pulse magnetic field pretreatment,there exists some atomic clusters and a little crystallized phases segregation in samples.When the samples are crystallized,precipitates are increased with the decrease of the average grain size,and the crystallization area is increased with increasing in the processing time.The VSM test results indicate that the coercivity and remanence ratio of the samples are reduced significantly after pulse magnetic field pretreatment,indicating more excellent integrated magnetic properties.  
        关键词：Iron-based Amorphous Alloy;Pulse Magnetic Field Pretreatment;Magnetic Properties   
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        发布时间：2023-12-18
      • Chen Hongmei,Zang Qianhao,Zhang Jing,Jin Yunxue,Xiang Hongfu
        Vol. 35, Issue 10, Pages: 1012-1015(2015) DOI: 10.15980/j.tzzz.2015.10.002
        摘要：The texture of cold-rolled TC4 titanium alloy pipe was analyzed.Effects of rolling deformation and cogging pass-deformation rate on the texture of TC4 titanium alloy were approached.The results show that the texture of the original material exhibits relatively uniform distribution,and the maximum value of（0002）pole figure is close to the RD direction.The distribution of the pole is gradually rearranged during the rolling process,and the pole is arranged to the TD direction in the（ND-TD）plane to replace the original texture,and the maximum value is closed to ND direction in the（ND-RD）plane.In the（1010）pole figure,the rearranged texture appears in the（ND-RD）plane,and the maximum value is close to RD direction.The intensity of（1010）pole figure is less than that of（0002）pole figure.The intensity of the texture is increased with the increase of the rolling deformation in（0002）pole figure and（1010）pole figure,meanwhile,the larger deformation rate can promote the restructuring of texture.  
        关键词：TC4Titanium Alloy;Cold Rolling;Tubes;Texture   
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        发布时间：2023-12-18
      • Vol. 35, Issue 10, Pages: 1016-1020(2015) DOI: 10.15980/j.tzzz.2015.10.003
        摘要：The Al-5Zr-xB grain refiner was prepared by in-situ reaction from Al melt and K2ZrF4+KBF4powders.The microstructure and grain refining efficiency of Al-5Zr-xB grain refiner were analyzed by OM（optical microscopy）,XRD（X-ray diffraction）and SEM（scanning electron microscopy）.The results show that the Al-5Zr-xB grain refiner is composed of a lot of fine and uniform ZrB2 particles,and the ZrB2 particles are distributed in theα-Al grains boundary in Al-5Zr-xB grain refiner.The higher the content of element B in the Al-5Zr-xB grain refiner is,the more the number of ZrB2 particles are and the stronger the grain refining efficiency of the Al-5Zr-xB grain refiner is.With adding 0.2% Al-5Zr-1.8B grain refiner,the average diameter of theα-Mg grains in AZ91 D magnesium alloy can be refined to 120μm and theα-Mg grains size is decreased by 63.4%.The tensile strength and elongation of AZ91 Dmagnesium alloy are improved to 213 MPa and 4.95%,respectively,which are improved by 15.1% and by30.3% compared with those of AZ91 D magnesium alloy without adding the Al-5Zr-1.8Bgrain refiner  
        关键词：Magnesium Alloy;Al-Zr-B Grain Refiner;Grain Refinement;Heterogeneous Nucleation   
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        发布时间：2023-12-18
      • Vol. 35, Issue 10, Pages: 1015-1023(2015)
        摘要：<正>巨腾国际净利增长14%,拓展3C金属机壳业务显成效近日,巨腾国际控股有限公司公布中期业绩报告。2015年16月,巨腾国际实现营业收入42.15亿港元,较去年同期的43.99亿港元下跌4.2%。其中,中国大陆收入仍占绝对比例,为41.61亿港元。巨腾国际表示,上半年,国内外经济不断下行的压力下,全球个人电脑（PC）市场也面对巨大的挑战,据国际数据资讯公司（IDC）发布的统计数据,2015年第二季度,全球PC出  
          
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        发布时间：2023-12-18
      • Sun Deqin,Dai Guohong,Xu Yue
        Vol. 35, Issue 10, Pages: 1020-1023(2015) DOI: 10.15980/j.tzzz.2015.10.004
        摘要：High Mg element content in Al slag materials could be brought into the melts to cause the chemical elements in the Al alloy composition not meeting requirements.The process of Mg element-removing from waste Al melting by fluxing technology was analyzed.The results show that with fluxingagents of AlF3 and MnCl2（mass ratio of 1∶2）and about 1%1.5% addition for 30 min,Mg elementremoving efficiency exhibits desirable.  
        关键词：Waste Al Recycling;Mg Element-removing Reaction;Fluxing Technology;Processing Control   
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        发布时间：2023-12-18
      • Zhao Junhua,Zhang Na
        Vol. 35, Issue 10, Pages: 1024-1027(2015) DOI: 10.15980/j.tzzz.2015.10.005
        摘要：Based on the deformation temperature and strain rate as parameters,change of microstructure and properties of rolling AT33 alloy with different deformation parameters was described,and the deformation mechanism of AT33 alloy was characterized by establishing the constitutive equation.The results show that the deformation activation energy is 145kJ/mol with the stress exponent nof 6.5,so the deformation mechanism is characterized by lattice diffusion controlled dislocation climb.Dynamic recrystallization occurs with the deformation temperature more than 200℃,and the recrystallized grain boundary shows saw tooth style with the size less than 2μm.  
        关键词：AT33Alloy;Deformation;Strain Rate;Grain Size;Microstructure   
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        发布时间：2023-12-18
      • Hou Juncai
        Vol. 35, Issue 10, Pages: 1027-1030(2015) DOI: 10.15980/j.tzzz.2015.10.006
        摘要：AZ63 magnesium plain divergent extrusion mould was designed,and processing parameters window was presented to extrude rod-like magnesium sacrificial anode with diameter of 26.7mm and inner diameter of the embedded steel bar of 3.4mm.Effects of homogenizing annealing treatment on the extrusion behavior and the characteristics of the magnesium sacrificial anode were investigated.It is shown that the plasticized extrusion billet can be diverged by three fanning tapered divergent orifices symmetrically distributed and be welded in the extrusion channel to form the homogenizing annealed AZ63 magnesium anode.The defect-free AZ63 magnesium anode with smaller shape error can be obtained by using the lower extrusion speed.Compared with those of the as-cast AZ63 magnesium anode,the current efficiency and open potential of the extruded AZ63 magnesium anode are improved greatly.  
        关键词：Electro-Chemical Properties;Dendritic Segregation;Extrusion Parameters   
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        发布时间：2023-12-18
      • Fu Ying,Ding Xin,Jie Jinchuan,Wang Haiwei,Zhang Yubo,Lu Yiping,Li Tingju
        Vol. 35, Issue 10, Pages: 1030-1032(2015) DOI: 10.15980/j.tzzz.2015.10.007
        摘要：A new method with low-cost and high-efficiency to purify MG（metallurgy grade）-Si was presented.The primary Si was separated directly from hypereutectic Al-Si melt by rotating magnetic field（RMF）.After etch cleaning,the solar-grade Si was obtained.The experimental results show that the Si-rich layer is formed in the ouer-layer of the ingot,and the content of Si is about 60% of Si-rich layer,while the inner microstructure of the ingot is composed mainly of the Al-Si eutectic structure.The Sirich was peeled from the ingot after aqua regia leaching,which its removal efficiency of metallic impurities was higher than 98%,and for B,P nonmetallic impurities,a desirable removal effect was realized.  
        关键词：Rotating Magnetic Field;Al-Si Alloy;Separation;Solidification   
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        发布时间：2023-12-18
      • Xie Jian,Hu Jun,Jiang Haofeng
        Vol. 35, Issue 10, Pages: 1033-1036(2015) DOI: 10.15980/j.tzzz.2015.10.008
        摘要：By brazing technology of Cu/Al heterogeneous metal with fixed gap ultrasonic assisted based on microcomputer control,the change of microstructure and mechanical properties of the Cu/Zn-3Al/Al joint prepare were observed with the ultrasonic soldering temperature at 380℃,420℃and 460℃.The results show that at 380 ℃,brazing layer is composed of Zn-Al eutectic,α-Al dendrites and CuZn5 phases while the brazing temperature is 420 ℃ and 460 ℃,brazing layer is composed ofα-Al dendrites,CuZn5 phase and Al4.2Cu3.2Zn0.7phase.In addition,at 420 ℃,intermetallic compound layer thickness reaches 1.9μm with diffusion layer thickness of 1.3μm,where the interface layer thickness is the minimum value for the three brazing temperature,and the tensile strength of the joint reaches maximum value.  
        关键词：Computer Control;Brazing;Cu/Al;Microstructure;Mechanical Properties   
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        发布时间：2023-12-18
      • Fan Li,Liu Ping,Yu Zhisheng,Jia Shuguo,Zhang Yi
        Vol. 35, Issue 10, Pages: 1037-1039(2015) DOI: 10.15980/j.tzzz.2015.10.009
        摘要：Effects of aging temperature,aging time and different cold deformation rate on microstructure and properties of Cu-Ni-Si-Cr-P alloy were investigated.The results show that after aged at 500℃for 2h,electrical conductivity and hardness of Cu-Ni-Si-Cr-P alloy with solution treated at 900℃reach 21.87MS/m and 234.5HV,respectively.The favorable comprehensive properties can be obtained with electrical conductivity of 20.07 MS/m and microhardness of 255.3HV,respectively,after 60%cold deformation by aging at 450 ℃ for 1h.When aged at 450 ℃,the precipitated phases which are identified as Ni2 Si and Ni3 P based on the selected-area electron diffraction pattern,are dispersedly distributed in the matrix.  
        关键词：Aging;Cold Deformation;Micro-hardness;Electrical Conductivity   
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        发布时间：2023-12-18
      • Vol. 35, Issue 10, Pages: 1032-1039(2015)
        摘要：<正>嘉瑞签约镁合金汽车电机壳体项目近日,嘉瑞国际控股（集团）有限公司（"嘉瑞国际"）与齐齐哈尔北方特种合金高科技有限公司就节能电动汽车镁合金电机壳体研发与应用项目,在齐齐哈尔市举行签约仪式。据悉,该节能电动汽车镁合金电机壳体研发与应用项目总投资2亿元,预计2016年开工。项目位于齐齐哈尔市龙沙区。  
          
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        发布时间：2023-12-18
      • Hu Xiaodong,Sun Xinglong,Xu Changjun,Zhao Hongyang,Li Jing,Zhang Xuejian
        Vol. 35, Issue 10, Pages: 1040-1043(2015) DOI: 10.15980/j.tzzz.2015.10.010
        摘要：Solidification defects in slender electrode ingot with the ratio of height and diameter of 9.0were predicted by Niyama rule in AnyCasting software to understand effects of the ratio of the riser and the mold,the time of the heating agent,the pouring temperature and casting speed.The simulation results reveal that possible defects in the slender electrodes ingot are located at top of the riser and center of electrode ingot,which is well agreement with practical ones.With optimized processing parameters,such as the ratio of the riser and the mold of 10%,the time of the heating agent of 60 min,the pouring temperature of 1 560 ℃and the pouring speed of 0.65m/s,the electrode ingot defects including shrinkage porosity and hole can be decreased effectively.  
        关键词：Slender Electrode Ingot;Solidification;Defects;Technological Parameters;Numerical Simula-tion   
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        发布时间：2023-12-18
      • Wang Hong,Zhou Jianxin,Yin Yajun,Wu Kai
        Vol. 35, Issue 10, Pages: 1043-1046(2015) DOI: 10.15980/j.tzzz.2015.10.011
        摘要：A method of spiral electromagnetic was presented to suppress formation of macro-magnetic,and the mathematical model of coupled fluid and mass field under electromagnetic field was established.Finite difference method was applied to solve the electromagnetic and temperature field,and finite volume method was adopted to solve the fluid and mass field.The simulation results demonstrate that the Lorentz force generated at the height direction of spiral electromagnetic can reduce the natural convection,and an obvious decrease of macrosegregation phenomenon occurs with the magnetic induction density of 5kA.  
        关键词：Spiral Electromagnetic Field;Cast Steel Ingot;Macrosegregation;Numerical Simulation   
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        发布时间：2023-12-18
      • Su Zaijun,Huang Yanxiang,Liu Chuming,Yang Xinhua
        Vol. 35, Issue 10, Pages: 1047-1051(2015) DOI: 10.15980/j.tzzz.2015.10.012
        摘要：The characteristics,mechanical properties and current status of cast magnesium alloy containing RE elements at home and abroad were reviewed.The strengthening mechanism of cast magnesium alloy containing RE elements was described,and development future of magnesium alloy containing RE elements was discussed briefly.  
        关键词：Cast Magnesium Alloy;Rare Earth;Alloying;Review   
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      • Zhang Hui
        Vol. 35, Issue 10, Pages: 1051-1054(2015) DOI: 10.15980/j.tzzz.2015.10.013
        摘要：Based on orthogonal testing,effects of processing parameters,such as pouring temperature,squeezing force,mould preheating temperature and holding pressure time,on microstructure of Al-12.4Si-4.5Cu alloy were investigated by SEM,OM,tensile testing.The results reveal that compared with common castings,squeezing castings exhibit more fine and uniform microstructure with more excellent mechanical properties,however,the ductility and corrosion resistance are decreased.The optimized processing parameters for the squeezing casting Al-12.4Si-4.5Cu alloy are presented as follows:pouring at680 ℃,preheating mould at 200℃ with pressure for 200 kN for 14 s.After heat treatment,the tensile strength and hardness of the alloy are increased by 106.8MPa and 20,compared with those of one without heat treatment.  
        关键词：Al-12.4Si-4.5Cu Alloy;Liquid Die Forging;Microstructure;Mechanical Properties   
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        发布时间：2023-12-18
      • Wang Chengjun,Han Dongdong,Chen Lei
        Vol. 35, Issue 10, Pages: 1055-1058(2015) DOI: 10.15980/j.tzzz.2015.10.014
        摘要：For cylinder block castings,pouring system model was established by a 3Dsoftware,and filling and solidification process were simulated by the ProCAST.Finally,the change of temperature field was visualized.The simulation results present the location of the casting defect.The initial process scheme was modified based on analysis of the simulated result.Numerical simulation was conducted to the improved scheme with different casting parameters.The results show that through reducing injecting velocity and increasing mould preheating temperature,the defects such as shrinkage（cavity）porosity can be reduced effectively,improving casting quality,reducing rejection rate and decreasing production cycle.  
        关键词：Die Casting;ProCAST;Cylinder;Numerical Simulation   
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      • Xu Yiwu,Hu Bin
        Vol. 35, Issue 10, Pages: 1058-1060(2015) DOI: 10.15980/j.tzzz.2015.10.015
        摘要：Universe analysis of engine camshaft cover flatness as the complete strategy frame of"Macro to Micro"and"Complex to Simple"was conducted.Based on the data-driven,non-critical factors were excluded and the root cause was found out gradually.Meanwhile,the methodology of exclusion,comparison and data analysis as well as the analysis tool of casting simulation were adopted,which are taken as helpers for problem investigation and solving.Finally,it is confirmed that layout of ejected pins is the major influence of flatness.  
        关键词：Strategy of Problem Solving;Flatness;Layout of Ejected Pins   
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      • Li Changhai,Zhu Lin,Yu Ning,Dong Xiuqi
        Vol. 35, Issue 10, Pages: 1061-1064(2015) DOI: 10.15980/j.tzzz.2015.10.016
        摘要：Based on the fluid mechanics principle,it is shown that if the speed ability of liquid surface pressure system is the better,the horizontal velocity will be higher（it can be up to hundreds times.）than the vertical velocity,when the molten metal fills the horizontal plane.So liquid-gas two-phase flow will appear in the horizontal plane,and it will move towards the vertical area,leading to the generation of cast defects at those areas finally filled.Therefore,the proportional controller with a slower speed ability than the combinational valves is more suitable for the low pressure die casting of liquid surface pressure system.  
        关键词：Low Pressures Die Casting;Liquid Surface Pressure System;Speed Ability   
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      • Guo Guangsi,Yuan Xiaoxia,Wang Guangtai
        Vol. 35, Issue 10, Pages: 1064-1066(2015) DOI: 10.15980/j.tzzz.2015.10.017
        摘要：Based on the analysis of structure of die-casting aluminum bending tube joint,process analysis,gating system design,die design,3Dmodeling and meshing were carried out for.According to the casting temperature field,the filling flow condition,the position of the shrinkage and shrinkage porosity,the desirable process parameters for simulation were presented as follows:injection speed of 1.8m/s,mold preheating temperature of 200℃,pouring temperature of 660℃.Through applying the optimized parameters for practical production verification,the die casting tube joint with satisfied quality was produced successfully.  
        关键词：Aluminum Alloy;Numerical Simulation;Die Casting;Tube Joint   
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      • Vol. 35, Issue 10, Pages: 1054(2015)
        摘要：<正>第17届立嘉国际机械展暨立嘉国际铸造压铸工业展、立嘉国际热处理工业炉展,将于2016年5月1114日在重庆国际博览中心举行。2016重庆铸造行业年会、2016重庆热处理行业年会将同期举行。重庆是我国最大的汽车制造基地,每8辆汽车就有1辆重庆造;而全球3台电脑就有1台重庆造,重庆已成为全球最大的笔记本电脑生产基地。今年上半年,重庆市GDP增速为11%,领跑全国。  
          
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      • Vol. 35, Issue 10, Pages: 1089(2015)
        摘要：<正>来自迈格码（苏州）软件科技有限公司的消息,第11届迈格码大中华区用户大会,将于2015年12月12日在苏州工业园区金鸡湖新罗酒店举行。现已正式开放报名,报名截止时间为11月10日。据了解,此次会议的亮点是通过MAGMA5 5.3版的虚拟试验设计和自动优化,开发稳健的铸造工艺及实现最优化的解决方案。  
          
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      • Cheng Shujian,Zhao Yuhong,Hou Hua,Jin Yuchun,Wang Bing,Wu Jinke
        Vol. 35, Issue 10, Pages: 1067-1069(2015) DOI: 10.15980/j.tzzz.2015.10.018
        摘要：The semi-solid slurry of ZL101Al-alloy was prepared by serpentine channel,and influences of pouring temperature,the number of curves and cooling ways on the microstructure of semi-solid ZL101 aluminum alloy were investigated.The results show that the satisfied semi-solid slurry of ZL101 aluminum alloy is prepared with pouring at 640℃to 680℃.The morphology of primaryα-Al grains is transformed from rosette to spheroid with the decrease of pouring temperature.At the given pouring temperature,increase of number of curves can improve the morphology of the primaryα-Al grains and decrease the grain size.The alloy melt exhibits the effect of"self-stirring"in the serpentine channel,which can make the primary nuclei gradually evolves into spherical and near-spherical grains.  
        关键词：ZL101Aluminum Alloy;Semi-solid;Slurry;Serpentine Channel   
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      • Qu Xianfeng,Zhang Yipeng,Nie Zhenshuai
        Vol. 35, Issue 10, Pages: 1070-1072(2015) DOI: 10.15980/j.tzzz.2015.10.019
        摘要：The oxidation characteristics of medium-temperature pattern material for investment casting was summarized.In the process of repeated use of pattern material,the oxidation deterioration was resulted from the high temperature in the process of dewaxing and water removal.With the gradually oxidation of the pattern material,its water removal is more and more difficult,and its ash content,shrinkage and viscosity is higher and higher,thus the cast quality is deteriorated greatly.The rational process for dewaxing and water removal can be helpful for the oxidation slowdown.  
        关键词：Medium-temperature Pattern Material;Oxidization;Wax Pattern Reclamation   
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      • Kang Yan,Mao Weimin,Xu Dusheng,Chen Yijun,Jing Jian,Chen Xuemei
        Vol. 35, Issue 10, Pages: 1073-1077(2015) DOI: 10.15980/j.tzzz.2015.10.020
        摘要：Vertical mechanical vibration was applied during the casting and solidification process of investing casting 0Cr17 stainless steel.Compared with the non-vibrating samples,influences of frequency and amplitude on the grain size and mechanical properties of 0Cr17 were investigated.The results reveal that at the same frequency,with the increase of the amplitude,the grain size is decreased and the tensile strength is increased,whlie at a low amplitude,change of the grain size can be ignored with the increase of frequency,At a higher amplitude,the grain size is decreased and the tensile strength is increased with the increase of frequency.The optimal values of frequency and amplitude are 35 Hz and 4mm,respectively,where refining degree can reach to 66.7%,and the tensile strength is 9.3% higher than that of the non-vibrating samples.  
        关键词：Mechanical Vibration;Investment Casting;Nickel Free Ferrite Stainless Steel   
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        发布时间：2023-12-18
      • Zhu Yong,Yang Anheng,Zhang Jixiang,Deng Zhiming,Xie Hongchao,Kong Jianwen
        Vol. 35, Issue 10, Pages: 1077-1079(2015) DOI: 10.15980/j.tzzz.2015.10.21
        摘要：The AuGe12 alloy was prepared by horizontal continuous casting,and influence of the volume of nitrogen on microstructure and segregation of the alloy ingot was investigated.The results reveal that the dendrites in AuGe12 are refined to gradually begin to evolve into equiaxed state with the increase of volume of nitrogen to enhance the stirring.The increase of the volume of nitrogen can inhibit segregation of AuGe12 alloy,and significantly improve the degree of segregation AuGe12 alloy.  
        关键词：AuGe12Alloy;Horizontal Continuous Casting;Microstructure;Segregation   
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      • Yu Ning,Chen Zhi,Du Dexi,Dong Xiuqi,Yang Yang
        Vol. 35, Issue 10, Pages: 1080-1082(2015) DOI: 10.15980/j.tzzz.2015.10.022
        摘要：Reasonable wall thickness is proportional to the thickness of the casting,and inversely proportional to the difference between solidification temperature of liquid metal and preheating temperature of metal mould by transferring heating calculation.The larger the wall thickness of metal mould is,the larger its thermal capacity is.So the capability that decreases the temperature of molten metal through its own thermal capacity is the stronger.However,it is difficult for the metal mould to cool molten metal by using cooling media owing to the larger thermal resistance of the metal mould.When the wall thickness exceeds the reasonable wall thickness of the metal mould,effects of cooling methods on castings are slight,so the cooling effect is poor.The thermal resistance on circular direction for metal mould is low for the larger thickness of the metal mould,and effect of the mean temperature distribution of the metal mould is strong.It is suitable for simultaneous solidification.The metal mould with thin wall is contrary to the above results.  
        关键词：Metal Mould Casting;Mould Wall Thickness;Castings Quality   
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      • Shang Runqi,Qu Yinhu,Cheng Xiaole
        Vol. 35, Issue 10, Pages: 1083-1085(2015) DOI: 10.15980/j.tzzz.2015.10.023
        摘要：Fracture failure of ZG35 CrMnSi steel pin rail by EPC was analyzed by macro-scope fractography,microanalysis for fracture,chemical analysis,mechanical properties.The results show that the macro or microstructure of pin rail fracture has plenty of slag inclusion,and chemical compositions exceed upper limit of the standard,resulting in the low plasticity and toughness,which lead to the brittle fracture of ZG35 CrMnSi steel pin rail.It is suggested that EPS-PMMA or PMMA is used as the EPC mold,and the hollow mold is used instead of solid mold,or sand casting process must be used instead of EPC.Meanwhile,the chemical composition of castings must be controlled strictly within specification to reduce the slag inclusion and improve the plasticity and toughness.  
        关键词：Pin Rail;Fracture;EPC;Slag Inclusions   
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      • Nie Mingming,Xu Zhifeng,Yu Huan,Wang Zhenjun,Yao Jing
        Vol. 35, Issue 10, Pages: 1085-1089(2015) DOI: 10.15980/j.tzzz.2015.10.024
        摘要：The vacuum gas pressure infiltration was performed for preparing the unidirectional continuous Cf/Al composite with the volume fraction of 40%,of which the reinforced material was M40 graphite fiber and the matrix alloys selected ZL102,ZL114 A,ZL205Aand ZL301 alloys,respectively,to explore effects of matrix alloy on the relative density and tensile strength of continuous Cf/Al composites.The results show that at the preheating temperature,infiltration temperature,impregnation pressure and holding time of 550 ℃,730 ℃,7 MPa and 20 min,respectively,among four kinds of composites,the relative density of continuous M40/ZL301 composites reaches 99.9% with most uniform distribution of fibers in the matrix.Meanwhile,its tensile strength reaches 670.2 MPa,compared with that of M40/ZL102 composites,increased by 639%.The tensile fracture is significantly different from the other three kinds of brittle fracture of composites,exhibiting typical ductile fracture.  
        关键词：Continuous Cf/Al Composites;Matrix Alloy;Relative Density   
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      • Hu Fengrong,Yu Guokang,Sun Wanting,Zou Chunming,Wang Hongwei,Wei Zunjie
        Vol. 35, Issue 10, Pages: 1090-1094(2015) DOI: 10.15980/j.tzzz.2015.10.025
        摘要：Mg-10Gd-3Y-0.7Zr alloy was prepared by low-pressure casting.Microstructure evolution of Mg-10Gd-3Y-0.7Zr alloy was observed by optical microscope,scanning electron microscope,energy disfraction spectrometer and differential thermal analysis.The heat treatment process was optimized to improve the mechanical properties of the alloy,and strengthening mechanism of heat treatment on properties of the alloy was described based on microstructure analysis.The results indicate that the as-cast microstructure of Mg-10Gd-3Y-0.7Zr alloy is composed of primaryα-Mg and eutectic Mg24（Gd,Y）5phase which is distributed coherently along the grain boundary.After heat treatment,the continuous distributed Mg24（Gd,Y）5phase disappears,and primaryα-Mg and Mg5（Gd,Y）particles exist mainly in the alloy.Under 520℃×14h+230℃×20htreatment conditions,the desirable mechanical properties can be obtained.After solution heat treatment at 520 ℃for 4h,the strength of Mg-10Gd-3Y-0.7Zr alloy exhibits neglected change,while the elongation is increased from 5.5% to 13.4%,increased by 144%.After aging at 230 ℃,the mechanical properties of Mg-10Gd-3Y-0.7Zr alloy exhibit excellent,where the tensile strength,yield strength and elongation reach 307.8MPa,200.4MPa and 7.2%,respectively,increased by 41%,38%and 31% compared with those of the as-cast sample.  
        关键词：Magnesium Alloy;Heat Treatment;Microstructure;Mechanical Properties   
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      • Zhou Wei,Zhang Lei,Long Chao
        Vol. 35, Issue 10, Pages: 1094-1096(2015) DOI: 10.15980/j.tzzz.2015.10.026
        摘要：Effects of Zr on microstructure,mechanical properties and damping capacity of Mg-0.9Si alloy were investigated.The results show that the solidified microstructure of Mg-0.9Si alloy can be refined significantly with Zr addition.The optimized Zr addition is 0.6%.With 0.6% Zr addition,the tensile strength and elongation of the as-cast Mg-0.9Si alloy reach 187.2MPa and 6.8%,respectively,increased by 43.4% and by 64.3%,compared with those of the unmodified alloy.Mg-0.9Si-0.6Zr alloy exhibits much higher damping capacity than that of the unmodified alloy.  
        关键词：Zr;Mg-0.9Si Alloy;Microstructure;Mechanical Properties;Damping Capacity   
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      • Li Yinan,Jiang Wenyong,Xin Beiping,Zhao Sicong,Shang Jizhang
        Vol. 35, Issue 10, Pages: 1097-1100(2015) DOI: 10.15980/j.tzzz.2015.10.027
        摘要：Influences of different low temperature pre-aging on microstructure and mechanical properties of the ZM6 magnesium alloy were analyzed by optical microscopy,universal tensile testing machine,electronic brinell hardness tester,scanning electron microscopy.The results reveal that with the increase of pre-aging temperature,microstructure of the alloy has absent change,and the average gain size is in range from 39.88μm to 41.67μm.The brinell hardness and tensile strength of alloy are increased firstly and then decreased.The ZM6 magnesium exhibits the desirable comprehensive mechanical properties after two-stage aging of 100 ℃×4h+200 ℃×8h,where the hardness and the tensile strength reach（HBS）80.7and 260 MPa,respectively.The fracture morphology of alloy is flat,and fracture mechanism is characterized by intergranular fracture companied with transgranular fracture partly.Cleavage fracture is dominant with different between size and depth cleavage step.  
        关键词：ZM6Alloy;Two-stage Aging;Low Temperature Pre-aging;Mechanical Properties   
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      • Liu Yue,Wang Zhongjun
        Vol. 35, Issue 10, Pages: 1100-1105(2015) DOI: 10.15980/j.tzzz.2015.10.028
        摘要：The interfacial microstructure and morphology of Al/LZ91/Al alloy laminated composite plate were observed by optical microscopy（OM）and scanning electron microscopy（SEM）,and effects of different temperature and holding time of annealing on interfacial diffusion and tensile properties of the composite plate were investigated.Meanwhile,the diffusion equation was established.The results show that recovery and recrystallization can be observed with increasing in annealing temperature or annealing time,and the microstructure of inner layer LZ91 magnesium alloy is composed of uniform and equiaxed grains.After annealing treatment,diffusion of Mg,Al and other elements occurs,and interface consists ofα-Mg+β-Li phase,Mg17Al12 phase,Al3Mg2phase andα-Al phase.After annealing treatment at 300℃for 1h,tensile strength and elongation of plate reach 130 MPa and 15.8%,respectively.  
        关键词：Microstructure;Interfacial Diffusion;Annealing Treatment;Intermediate Phase   
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      • Wang Ye,Li Xiaoqian,Jiang Ripeng,Zhang Yun,Jiang Wen
        Vol. 35, Issue 10, Pages: 1106-1109(2015) DOI: 10.15980/j.tzzz.2015.10.029
        摘要：Ultrasonic vibration was imposed on aluminum alloy melt to explore effects of refinement on the casting microstructure of 7085 alloy with different process parameters.At 680 ℃,the liquid aluminum was pretreated by applying ultrasonic energy field or refiner and refining agent combining ultrasonic field and then poured.The results show that the refinement effect of ingot microstructure can be enhanced with increasing in ultrasonic time.With the ultrasonic treatment for 30 min,the grain refinement exhibits desirable.Under the condition of 680℃,the grain size is coarsened gradually with increasing in holding time after ultrasonic tretament.And effect of ultrasonic refining almost disappears with holding time more than 8min.  
        关键词：7085Aluminum Alloy;Power Ultrasonic;Grain Refinement;Treating Time;Holding Time   
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      • Pan Fei,Lu Gang,Yan Qingsong,Yang Puchao,Wang Qing
        Vol. 35, Issue 10, Pages: 1110-1113(2015) DOI: 10.15980/j.tzzz.2015.10.030
        摘要：Effects of ultrasonic vibrational temperature on the relative density of ZL114 Aaluminum alloy were investigated through testing and analyzing density at different temperature in ultrasonic vibration.Meanwhile,the relationships between the density of ZL114 Aaluminum alloy and ultrasonic vibrational temperature as well as diameter were described.The results indicate that at a given ultrasonic vibrational temperature,the density of aluminum alloy is increased with the increment of diameter.When the diameter is less than 9mm,the ultrasonic vibrational temperature has a great impact on density,where with the increase of ultrasonic vibrational temperature,the density of aluminum alloy is decreased firstly and then increased and last fall.The optimized ultrasonic vibrational temperature is 720℃.When the diameter is larger than 9mm,the diameter has a great impact on density,where with the increase of ultrasonic vibrational temperature,the density of aluminum alloy is increased firstly and then decreased.The desirable ultrasonic vibrational temperature is 700 ℃.  
        关键词：ZL114AAluminum Alloy;Ultrasonic Vibrational Temperature;Density;Diameter   
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      • Luo Xudong,Tang Changting,Jin Chenggang,Jiang Kuiguang,Ding Qingwei,Wang Jiachun
        Vol. 35, Issue 10, Pages: 1114-1118(2015) DOI: 10.15980/j.tzzz.2015.10.031
        摘要：Main source of ferrum,silicon,gallium,vanadium,sodium and calcium,in aluminum and aluminum alloys were summarized based on the data from metallurgical and casting process.The generation process and mechanism of each impurity element were discussed based on metallurgy,materials science and other related theories,which provided reference and direction for control of the impurity elements in aluminum and aluminum alloys.  
        关键词：Liquid Aluminum Primary;Aluminum Alloys;Impurity Elements   
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      • Le Wenkai,Yuan Zizhou,Zhou Zigang,Li Duanxian
        Vol. 35, Issue 10, Pages: 1118-1120(2015) DOI: 10.15980/j.tzzz.2015.10.032
        摘要：The（Zr56Al16Co28）100-xYx（x=0,2,4）alloy samples were prepared by single roller melt spinning in high vacuum.Effects of Y on corrosion behavior of samples in 1mol/L HCl solution were investigated by X-ray diffraction（XRD）,Electrochemical polarization curve,Scanning electron microscope（SEM）.The results indicate that corrosion resistance of the Zr-Al-Co-Y alloy is superior to 1Cr18Ni9 Ti,and proper Y addition can improve the corrosion resistance of Zr-Al-Co-Y remarkably.  
        关键词：Zr-based Amorphous;Alloying;Y;HCl Solution;Corrosion Resistance   
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      • Vol. 35, Issue 10, Pages: 1121(2015)
        摘要：<正>20151001 Isiam S T,DAS P,DAS S.微观尺度下考虑近似代表体积元模拟分析流变铸造A356铝合金的变形行为.Metals and Materials International,2015,21（2）:311-323.利用二维有限元并结合近似代表体积元的微观结构分析方法,在微观尺度下模拟分析流变铸造对A356铝合金塑性变形能力的影响。结果表明,高应变区主要集中在与原始载荷成45°的方位;塑性失稳导致的空位萌生、生长以及聚集是造成A356铝合金失效的主要原因;相比传统铸造,60°坡度下的流变铸造  
          
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      • Vol. 35, Issue 10, Pages: 1122(2015)
        摘要：<正>20151001一种直接挤压铸造模具的锁模装置,CN104139170A,2014.11.12,华南理工大学.本发明公开了一种直接挤压铸造模具的锁模装置,包括一个套设右侧模外部的上锁模环和一个套设在左侧模外部的下锁模环,上锁模环和下锁模环的环内表面与左侧模和右侧模合型位置的锥形面角度一致,使模具合型时能相互配合,形成自锁角角度。模具预合型时,下锁模环在下锁模环驱动缸的驱动下运动至侧模下合型位置自锁,上锁模环在上模板的带动下运  
          
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