最新刊期
      卷 ， 期 3 ， 2002
      • Sun Jianfei Cao Fuyang Shen Jun Li Qingchun
        Issue 3, Pages: 1-3(2002)
        摘要：Kinetic behavior of nucleation and growth of atomized droplet during spray forming was studied through the analysis of solidified microstructure of sprayed powder molded superalloy in connection with heat transfer. The results showed that heterogeneous nucleation predominated during atomized process. The nuclei formed by solidified particulates in collision with large droplet play important role in nucleation mechanism. All fine powders with various grain size emerge rapidly solidified dendrite growth morphology. The quantitative relation between refined structure degree and cooling rate was given.  
        关键词：Spray Forming;Droplet;Nucleation;Dendrite Growth   
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        发布时间：2023-12-18
      • Li Yuanyuan Guo Guowen Zhang Weiwen Luo Zongqiang
        Issue 3, Pages: 4-6(2002)
        摘要：Effects of alloying elements Zr and V on the mechanical properties of HA alloy in Al Cu alloy series were investigated to develop a high strength and toughness cast Al alloy with low hot tearing trend. The results showed that proper V addition can significantly enhance both tensile strength and elongation of the alloy while Zr can improve these properties to a certain extent.  
        关键词：Al Cu Alloy;Zr;V   
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        发布时间：2023-12-18
      • Li Wei Jing Shan Shen Baoluo Gao Shengji Tu Mingjing
        Issue 3, Pages: 6-8(2002)
        摘要：Short mullite fibre reinforced Al 3.5Cu composite and its base alloy were prepared in squeezing casting. Effects of temperature on the ageing behavior of the composite and its base alloy were studied by means of hardness measurement（HB）, differential scanning calorimetry（DSC） and transmission electron microscope（TEM）. The results showed that both the composite and the base alloy have the similar ageing hardening curves and the same precipitation sequence: the higher ageing temperature is responsible for lower peak hardness and faster ageing precipitation progress. Short mullite fibre not only increase the aged hardness of Al 3.5Cu alloy but also accelerate the ageing precipitation. It is also found that the GP zone formation is greatly suppressed by short mullite fibre while the precipitation of θ（Al 2Cu） is nearly unchanged .  
        关键词：Al Cu Base Composite;Short Mullite Fibre;Temperature;Ageing   
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        发布时间：2023-12-18
      • Cao Hongbo Pan Ye Zhang Chuan
        Issue 3, Pages: 9-11(2002)
        摘要：ZL101 alloy with round, fine, homogenously distributed non dendrite primary α phase suitable for semi solid process was fabricated by crystallization controlling method. Average equivalent diameters of primary α phase is 90 μm and average shape coefficient is 0.75. We have developed a experimental compression equipment to conduct semi solid direct compression deformation for both conventional dendrite structure and non dendrite grain structure slurry at different deformation temperatures（constant deformation rate 0.01 s -1 ）. The deformation behavior of the slurry was evaluated from the aspects of surface quality, limited plasticity and deformation degree. The limited plasticity of semi solid grain structure slurry can be achieved up to 33.10% at 585℃ and up to 22.36% at 565 ℃ while that of conventional dendrite structure slurry can be only achieved up to 27.44% at 585 ℃ and up to 21.36% at 565 ℃. The liquid flow dominated over compression deformation of semi solid grain structure.  
        关键词：Semi solid;Compression Deformation;Limited Plasticity;Aluminum Alloy   
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        发布时间：2023-12-18
      • Wang Lishi Duan Hanqiao Wei Bokang Zhang Shichang
        Issue 3, Pages: 12-14(2002)
        摘要：Effects of MM on the microstructure and properties of as cast and heat treated AZ91 Mg alloy were studied. The results showed that MM can improve significantly as cast microstructure of AZ91 Mg alloy, refining Mg 17 Al 12 phase and acicular phase occurred so as to increase in hardness and strength and decrease in impact toughness and elongation. During further solid solution heat treatment, the acicular phase is un dissolved in matrix. The ageing process of AZ91 Mg alloy was postponed with MM addition.  
        关键词：AZ91 Mg Alloy;Mischmetal（MM）;Heat Treatment   
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        发布时间：2023-12-18
      • Cui Hongwei
        Issue 3, Pages: 15-17(2002)
        摘要：Technological parameters, including laser power P , scanning velocity v , laser beam diameter D , in laser remelting/solidifying treatment for ZL108 alloy piston were determined by orthogonal experimental technique. The optimum parameters were established by verifiable experiment and two new absorptive coatings were designed. Depth and width of the treated zone on ZL108 alloy precoated with SiO 2 coating and 40%Al 2O 3 +40%SiO 2 +20% C coating respectively were in coincidence with technological index. Due to the microstructure refinement and solid solution strengthening, the greatly elevated micro hardness of treated zone was beneficial to improving the piston properties.  
        关键词：Orthogonal Experimental Technique;ZL108 Alloy;Laser Remelting/Solidifying Process   
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        发布时间：2023-12-18
      • Ge Yuli
        Issue 3, Pages: 17-18(2002)
        摘要：Effects of coating layer thickness on the surface C content in ZG25 carbon steel casting in EPC by using EPS pattern, dry sand mould, and vacuum pouring were studied systematically. The results showed that surface C content has no change with proper coating layer thickness while with increasing in the coating layer thickness casting surface will appear in following sequence: decarburized zone carburized zone normal zone moreover,with decrease in decarbured zone and increase in carburized zone graduately.  
        关键词：Coating Layer;EPC;Surface Carburization;Surface Decarbonization   
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        发布时间：2023-12-18
      • Li Hui Zhang Jingwu Meng Xianzhe
        Issue 3, Pages: 19-2(2002)
        摘要：A new method for evaluating Al Si alloy modification rate was developed. The modification rate was defined as statistic probability for expectated value based on the classified Si phase SEM photos. The results showed that the method with intuition and data reliability is a better way to investigate quantitatively the modification law for aluminum alloy.  
        关键词：ZL101 Alloy;Modification;Modification Rate   
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        发布时间：2023-12-18
      • Dong Shijie
        Issue 3, Pages: 20-23(2002)
        摘要：The structural transformation of Cu Ti B mixed powders during mechanical alloying has been investigated by XRD, SEM and TEM. The results showed that powder particles and α Cu grain sizes in Cu Ti B mixed powder were fined and strain was increased continuously with the increase of mechanical alloying time. The dissolvability of Ti and B in α Cu could be enhanced through mechanical alloying. B addition could promote the dissolution of Ti in α Cu so as to accelerate the mechanical alloying process of Cu Ti B powder.  
        关键词：Mechanical Alloying;Cu Alloy;Dissolvability;Grain Size   
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        发布时间：2023-12-18
      • Wu Chunjing Xie Jianxin Zhao Lihua Wang Zidong Zhou Cheng
        Issue 3, Pages: 24-26(2002)
        摘要：We have developed a continuous casting machine with dual crystallizer for compund bimetal. The machine is characterized as follow: 1, graphite sleeve set in water cooling copper sleeve; 2, melting and holding electric resistance furnace with temperature control connected to crystallizer; 3, along the height a crystallizer with small diameter and a crystallizer with large diameter set in higher and lower position respectively. Through macro micro structure observation, chemical composition analysis and shear strength test in the compound interface, it is evident to get good compound Cu AlZn bimetal rod with inner diameter 20mm copper rod and external diameter 10mm ZnAl rod.  
        关键词：Continuous Casting;Compound Bimetal;Dual Crystallizer   
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        发布时间：2023-12-18
      • Lu Ding
        Issue 3, Pages: 26-27(2002)
        摘要：CAD for die casting die for cable TV allotter was introduced. The technological analysis for parts and the analysis for molded parts in the die were conducted. The pertinent ways for die and part production were given.  
        关键词：Die Casting Die;CAD;Die   
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        发布时间：2023-12-18
      • Xing Shuming Zhang Lizhong
        Issue 3, Pages: 28-29(2002)
        摘要：Steel billets without columnar grain in semi solid continuous casting is a newly developing technology in continuous casting. The steel billets obtained have excellent metalworking formability in continuous casting. The essential procedures consist of alloy melting, preheating pre crystalizer, melt stirring and oscillation, solidification and drawing. The basic conception and application of the SSCC, structure and characteristics of the billet, and further development were introduced.  
        关键词：Continuous Casting;Semisolid Continuous Casting;Columnar Grain   
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        发布时间：2023-12-18
      • Yu Yanmei Yang Gencang Zhao Dawen Lü Yili
        Issue 3, Pages: 30-33(2002)
        摘要：The main methods and present status for solidification microstructure in numerical simulation were introduced and reviewed. The problems to be faced and developing tendency in the field were proposed.  
        关键词：Solidification;Microstructure;Numerical Simulation   
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        发布时间：2023-12-18
      • Tang Bin Li Peijie Zeng Daben Liu Shuxun Liu Mingxing
        Issue 3, Pages: 34-36(2002)
        摘要：The present research status of Mg base composite was analyzed. The existing problem and deficiency in research of fundamental principle and manufacturing technology of Mg base composite were proposed. The development of Mg base composite was forecast.  
        关键词：Mg Base Composite;Interface Reaction;Synthetic Process   
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        发布时间：2023-12-18
      • Guo Jingjie Zhang Tiejun Su Yanqing Ding Hongsheng Jia Jun
        Issue 3, Pages: 37-39(2002)
        摘要：Electromagnetic processing technologies in foundry, including EMC, electromagnetic stirring, electromagnetic atomization, electromagnetic restriction forming, thin walled casting under traveling magnetic field, melt transportation technique etc.,on the basis of Joule effect and Lorentz force caused by the interreaction between electromagnet and metal were introduced. These technologies would dominate in green integral casting .  
        关键词：Electromagnetic Technique;Thermal Effect;Force Effect;Casting   
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        发布时间：2023-12-18
      • Vol. 0, Issue 3, Pages: 40-41(2002)
          
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        发布时间：2023-12-18
      • Chen Jinshui Liu Yongbin Cai Huimin
        Issue 3, Pages: 42-44(2002)
        摘要：Quantitative relationship between accuracy of casting titanium article in prosthodontics and expansion value of special investment for casting titanium was determined based on both tests of the investment expansion and Ti casting accuracy. And a newly specially developed investment for dentistry casting titanium was developed. Clinical experimental result showed that the accuracy of the investment has reached ADA standard in USA.  
        关键词：Casting Accuracy;Prosthodontics;Titanium Alloy   
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        发布时间：2023-12-18
      • Vol. 0, Issue 3, Pages: 45-46(2002)
          
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        发布时间：2023-12-18
      • Hong Shenzhang
        Issue 3, Pages: 47-49(2002)
        摘要：Not only the defects, including gas porosity and non metallic inclusion, in Al die castings are eliminated but also the casting yield and material utilization are increased through adopting extrusion casting instead of pressure die casting. The die structure and design parameters of extrusion casting for aluminum alloy joint were introduced. Technological parameters and selection basis of extrusion casting were analyzed.  
        关键词：Aluminum Alloy Joint;Extrusion Casting;Die Structure   
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        发布时间：2023-12-18
      • Zhang Yuanshi Song Pingjuan
        Issue 3, Pages: 49-50(2002)
        摘要：The origination of casting defects in 750 motorcycle wheel in low pressure casting was analyzed. Some methods, including insulating riser, insulating gate, were applied to improve the low pressure casting mold and the qualified products were made successfully.  
        关键词：Wheel;Defects;Low Pressure Casting Mold;Insulating Materials   
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        发布时间：2023-12-18
      • Vol. 0, Issue 3, Pages: 51(2002)
          
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        发布时间：2023-12-18
      • Vol. 0, Issue 3, Pages: 52-53(2002)
          
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        发布时间：2023-12-18
      • Li Zengmin Liu Qunshan
        Issue 3, Pages: 53-54(2002)
        摘要：The dry sand filling and compaction by vibration are one of very important technologies in EPC. The practice showed that the vibrating balance and uniformity of the device are also very important, besides appropriate vibrational parameters.  
        关键词：Lost Foam Casting;Dry Sand Compaction by Vibration;Balance;Uniformity   
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        发布时间：2023-12-18
      • Zeng Qiulian Zhang Aisheng Wei Xiuqin Zhou Lang
        Issue 3, Pages: 55-57(2002)
        摘要：Effects of trace RE and B on copper and its alloy of late years were reviewed. The RE are able to remove inclusion, purify grain boundary, refine structure and eliminate columnar grain so as to improve the electrical conductivity, mechanical properties, cold and hot workability, wear resistance and corrosion resistance of the copper and its alloy. B can more significantly refine grain as compared with RE. The latest experimental data were offered.  
        关键词：RE;B;Cu and Its Alloy   
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        发布时间：2023-12-18
      • Vol. 0, Issue 3, Pages: 58-59(2002)
          
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        发布时间：2023-12-18
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