最新刊期
      卷 ， 期 7 ， 2005
      • Ye Bin Xiong Jiangang Li Bo Li Zhiyuan
        Issue 7, Pages: 385-388(2005)
        摘要：Desirable crystallization curves were obtained by investigating the structure relaxation phenomenon and crystallization behavior of bulk amorphous Zr43Cu50Al7 alloy by differential scanning calorimetry （DSC） at different rates,in which the relaxation values,glass transition temperature Tg,crystallization initiation temperature Tx and crystallization peak temperature Tp were described.The amorphous alloy possesses a higher glass forming ability with temperature of supercooled liquid region up to 76.2 K.Preliminary approach to the obtained curves was conducted,and the activation energy for Tg,Tx,Tp and phase crystallization Ex were determined by the Kissinger and Deloy method.It was indicated that the obtained amorphous alloy has excellent heat stability.  
        关键词：Bulk Amorphous Alloy;DSC;Structure Relaxation;Crystallization   
        2
        |
        408
        |
        6
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173510 false
        发布时间：2023-12-18
      • Zhang Yong~1 Lu Binheng~2
        Issue 7, Pages: 388-390(2005)
        摘要：Preparation of porous Co-Cr-Mo alloy by vacuum centrifugal infiltration method was conducted,by using the specimen and gating system manufactured by rapidly manufacturing method and the mold cavity obtained by ZrO2 investment casting as well as two kinds of self-screen filling materials.The processing parameters for the preparation were researched.The results showed that the porous Co-Cr-Mo alloy bone frame produced by the method has the features of good connectivity and high porous rate,providing a basis for the application to man-made living bone.  
          
        2
        |
        167
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174307 false
        发布时间：2023-12-18
      • Sheng Wenbin Huo Hongliang Yin Zhanmin Gu Wanli
        Issue 7, Pages: 391-393(2005)
        摘要：A mathematical model for centrifugal filling and solidifying processes has been established to describe the formation of Ti-6Al-4V alloy abnormity castings.Effects of centrifugal field are simulated by two accessional terms.Stream function and eddy function are introduced to be a substitute for pressure term P to obtain the differential equation for the mathematical model.The filling and solidification in centrifugal field have been summarized based on the mathematical model established for the centrifugal cast Ti-6Al-4V abnormity castings.Calculated results showed that the flow in the cavity consists of forward flow and backward flow.The unsymmetrical initial temperature field causes continuous unsymmetrical variation in the following solidification,resulting in the final solidified region departed from the cavity axis in castings.  
        关键词：Ti-6Al-4V Alloy;Mathematical Model;Centrifugal Field;Temperature Field   
        2
        |
        107
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172247 false
        发布时间：2023-12-18
      • Lu Qingliang Min Guanghui Wang Changchun Yu Huashun
        Issue 7, Pages: 394-396(2005)
        摘要：Microstructure and micro-hardness of Zn-5Al alloy in equal angular channel processes were observed.Firstly,grain was drawn to wear out the ribbon structure,and the dislocation cell was formed by reaction of the ribbon structure with tangle dislocation in grain.Further,dislocation in the cell was deformed to form three dimensional grain boundary to create sub-crystal boundary with small angle and grain boundary with large angle,resulting in the refinement of the microstructure in equal angular channel process.TEM determination indicated that microstructure of the Zn-5Al alloy was refined,average grain size lower than 10μm,and Vickes hardness increases from 72.5 to 83.8 after seven times of deformation at 150 ℃.  
        关键词：Zn-5Al Alloy;Equal Angular Channel Process;Vickes Hardness   
        2
        |
        79
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173472 false
        发布时间：2023-12-18
      • Liang Yanfeng Dong Shengquan Yang Tong
        Issue 7, Pages: 397-399(2005)
        摘要：The thermodynamic analysis of formation of in-situ reinforced phase TiB2 and Al3Ti in （TiB2+Al3Ti）/Al-4.5Cu composites prepared by mixed salts reaction was conducted,and the heat changes of mixed salt system were analyzed by differential thermal analysis（DTA）.The results showed that although TiB2 possesses the strongest formation ability in Al-Ti-B ternary system,the reinforced phases are TiB2 and Al3Ti in the produced composites due to the reaction of relatively excessive [Ti] with Al to generate Al3Ti.DTA indicated that in-situ reaction can be taken place to form reinforced phase with the addition of mixed salt into Al-4.5Cu melt,in which the begin reaction temperature is 900 ℃ and end reaction temperature is 1 032 ℃.  
        关键词：In-situ Composites;Thermodynamic Analysis;TiB2;Al3Ti   
        2
        |
        217
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172947 false
        发布时间：2023-12-18
      • Zhang Chunxiang Guan Shaokang Zhu Shijie Liu Xiaofang Chen Jingyang
        Issue 7, Pages: 400-402(2005)
        摘要：Effects of low Si content on the microstructure and properties of Mg-8Zn-4Al-0.3Mn alloy were investigated.It was found that the fluidity and wear resistance of the alloy can be remarkably improved by adding Si,and the grain size can be refined also.The micro-hardness,rigidity,tensile strength and plasticity of the alloy can be obviously increased with Si content lower than 0.41% while can be remarkably decreased due to the occurrence of character Mg2Si phase in the alloy with the Si content up to 0.69%,meanwhile,precipitation of τ phase can be restrained and precipitation of φ phase can be promoted resulting from the decrease of Zn,Al atomic fraction in residual liquid phase.  
        关键词：Mg-Zn-Al Alloy;Si;Mechanical Mechanicaly Properties   
        2
        |
        122
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46171935 false
        发布时间：2023-12-18
      • Xie Jingpei~1 Guo Guoqing~1 Wang Jiefang~2 Wang Wenyan~1 Li Luoli~1
        Issue 7, Pages: 403-405(2005)
        摘要：Tensile and wear testing of electrolytic low Ti ZL108 alloy with different Ti content for piston of internal combustion engine were conducted,and tensile fracture and wear morphology were observed by SEM.Experimental results and regressive equation showed that the alloy has the highest tensile strength and the lowest wear quantity with 0.11%～0.16% Ti content.  
        关键词：Aluminum Base Alloy;Al-Si Alloy;Ti Content;Electrolytic Aluminum;Piston;Wear Resistance   
        2
        |
        69
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46171362 false
        发布时间：2023-12-18
      • Zeng Yiwen~1 Peng Liming~2 Mao Xiemin~1 Ding Wenjiang~2
        Issue 7, Pages: 406-407(2005)
        摘要：The protection of Mg alloy melt surface by a mixing gas containing difluoromethane was researched systematically.The results showed that the difluoromethane can effectively protect molten magnesium alloys.The minimum concentration of difluoromethane in the mixing gas is in the range of 0.02%～1% （volume fraction） for the protection of pure Mg and AM 60 alloy at different temperatures.The uniform and compaction surface oxidation film consists of MgO and MgF2,similar to those of the film in SF6 protective gas by structure analysis.  
          
        2
        |
        244
        |
        8
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172009 false
        发布时间：2023-12-18
      • Liu Hongjun~1 Li Yamin~1 Huang Naiyu~2 Dong Xuanpu~2 Fan Zitian~2
        Issue 7, Pages: 408-410(2005)
        摘要：The rapid manufacturing for metal parts can be realized by SLS prototyping combining with casting process.The rapid casting process similar to investment casting can be scheduled based on the features of molten ability and burn loss of raw materials.Aiming at the characteristics of rapidly manufacturing metal parts,the requirements of high qualification rate,good formation ability and high performance for rapidly manufacturing process were put forward.Top gating system is suitable for metal parts with simple structure and low height while multi-step gating system is suitable for large and complicated parts in gravity casting for rapid manufacturing of metal parts in practice.  
        关键词：SLS（Selected Laser Sintering）;Rapid Manufacturing;Casting Process   
        2
        |
        227
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173314 false
        发布时间：2023-12-18
      • Zhang Jinhui Yang Fang Qi Lehua
        Issue 7, Pages: 411-413(2005)
        摘要：Aiming at the problems of high difficulties operation and imcompatibility between tool softwares for simulating fabrication of MMC in liquid infiltration-extrusion process,a simulation platform of liquid infiltration-extrusion was built up,in which simulation platform was smoothly combined with the ANSYS and Matlab software by interface I/O based on VC++ language,and system modeling,parameter prediction,simulation and digital collection were integrated.By means of the platform,the processing difficulty can be decreased,promoting it to the practical use.  
        关键词：Liquid-solid Extrusion;Simulation Platform;Software Architecture   
        2
        |
        111
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172147 false
        发布时间：2023-12-18
      • Zhao Zhongxing~
        Issue 7, Pages: 413-415(2005)
        摘要：Image information of filling process was observed and recorded by computer video technology for hydraulic simulation based on physical simulation,image treatment and computer application.Quantitative flow field model was established by analysis of obtained flow state image in moving compensation technology for digital video treatment and calculation of two-dimensional velocity field in filling process of hydraulic simulation in low pressure casting,realizing the quantitative analysis of hydraulic simulation of filling process.  
        关键词：Low Pressure Casting;Hydraulic Simulation;Velocity Field;Computer Video Technology   
        2
        |
        244
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172358 false
        发布时间：2023-12-18
      • Chen Jianmei Zhang Xinming Deng Yunlai Peng Zhuokai Jiang Hao
        Issue 7, Pages: 416-418(2005)
        摘要：Characteristics of heat pipe technology was briefly introduced.The performance,role,potential value and application ways of heat pipe in light alloy in permanent mold casting were expounded.A new method for preparing magnesium alloy casting pipe by applying heat pipe to casting process and an improved method for preparing semi-solid billets of light alloy were specially proposed.Meanwhile,the application value of elevated hate pipe in cooling control of permanent mold casting was introduced.  
        关键词：Heat Pipe;Magnesium Alloy;Inorganic Heat Pipe;Semi-solid;Permanent Mold Casting   
        2
        |
        221
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46171150 false
        发布时间：2023-12-18
      • Vol. 0, Issue 7, Pages: 418-420(2005)
          
        2
        |
        20
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174527 false
        发布时间：2023-12-18
      • Yan Zhuorong Rong Jingbin Chen Jie
        Issue 7, Pages: 419-420(2005)
        摘要：Aluminum cover of engine for Honda car was manufactured by die casting.The predominant factors influencing the cover quality include advanced mould design,proper injection parameters,special moldfication for aluminum melt,rational improvement of ingate and exhaust pipe and proper control of die temperature.Some predominant parameters were determined including slow-injection velocity of 0.2～0.3 m/s,fast-injection velocity of 6.0～6.3 m/s,fast-injection distance of 460 mm and applying-pressure specific pressure of 33.6 MPa,applying-pressure distance of 510 mm,holding pressure of 8 s,pouring temperature of 680 ℃ as well as die temperature of 140～260 ℃.  
        关键词：Aluminum Cover;Die Casting;Quality Control   
        2
        |
        203
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172883 false
        发布时间：2023-12-18
      • Vol. 0, Issue 7, Pages: 421(2005)
          
        2
        |
        197
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174447 false
        发布时间：2023-12-18
      • Ding Supei~1 He Qiang~2 Xi Haichao~3
        Issue 7, Pages: 422-423(2005)
        摘要：The 519 Flange house with the size of 600 mm×364 mm that is a gas-sealing heavy rotary structure casting is manufactured in low pressure casting.The results showed that the sound Flange house can be manufactured successfully with die temperature of 300～350 ℃,filling pressure of 0.3MPa and filling time of 20 s,holding pressure of 0.8MPa as well as holding pressure time of 120 s.Product yield increases from 50% in sand casting to over 75%.The qualified rate of once-gas sealing testing reaches up to 98%.  
        关键词：Flange;Pressure Resistant Aluminum Casting;Low Pressure Casting   
        2
        |
        113
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172424 false
        发布时间：2023-12-18
      • Chen Qingwei
        Issue 7, Pages: 424-425(2005)
        摘要：The cleaning strainer base of 280 diesel engine in low pressure casting was discussed.The processing and mould design and trial production were expounded systematically.Some key parameters were set including the pouring temperature of 720～760 ℃,lift time of 5～10 s,filling velocity of 1.2～1.5 m/s,filling pressure of 0.05～0.08 MPa,holding pressure of 0.15～0.25 MPa,holding pressure time of 6～10 min and die temperature.  
        关键词：ZL101;Low Pressure Casting;Cleaning Strainer for Diesel Engine   
        2
        |
        91
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46171516 false
        发布时间：2023-12-18
      • Hu Yanhui~1 Wang Yuncheng~2[WT]
        Issue 7, Pages: 426-427(2005)
        摘要：Structure characteristics and technology of house of electric distribution device in die casting was analyzed.A available design sketch of die casting die by verification in practice was introduced based on the part structure.By using taken-out device to draw core and recycling water-cooling system in die design,the long-distance drawn-core for internal hole was resolved,and the defects of gas-hole and porosity in castings resulting from uneven castings thickness and superheat in formed parts as well as difficult exhaust were effectively overcome,which has the important role for improving the quality of the die castings.  
        关键词：Electric Distribution Device;Die Casting Die;Taken-out Device;Cooling System;Overflowing Slot   
        2
        |
        116
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46171619 false
        发布时间：2023-12-18
      • Min Xiaojun Li Ning He Yiming
        Issue 7, Pages: 428-430(2005)
        摘要：A new patent,pouring and self-setting core,was introduced.The core materials consist of soluble phosphate binder,magnesium oxide hardener and high-purity silicon oxide as refractory aggregate materials.Composition of the core and hardening mechanism were briefly introduced.Some key technological parameters,such as strength at both room and high temperatures and gas evolution,were tested under various conditions,and the influential factors were analyzed and concluded.Some other applying performances were also evaluated or described,including the bench time of the slurry and core accuracy,surface roughness,thermal shock resistance,collapsibility,easiness of chemical cleaning,high-temperature chemical stability of metal melt.  
        关键词：Investment Casting;Investment Core;Ceramic Core;Self-hardening   
        2
        |
        270
        |
        6
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172752 false
        发布时间：2023-12-18
      • Hua Dejun~1 Xiong Fengxia~2
        Issue 7, Pages: 431-432(2005)
        摘要：Effects of ambient temperature and humidity on sodium silicate mold shell investment casting were surveyed systematically based on practical experience.Some measures,such as adjusting powder-liquid ration of coating,hardening time,should be taken according to temperature change.In high humidity circumstance,it was cautioned that shell mold should be dried before next coating layer should be brushed and drying time should be extended before shell mold dewaxed.  
        关键词：Investment Casting;Temperature;Humidity;Shell Mold   
        2
        |
        94
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173267 false
        发布时间：2023-12-18
      • Chen Bing
        Issue 7, Pages: 433-435(2005)
        摘要：The working principle of a new type flash-burning dewaxing furnace was expounded.Molten pattern materials from shell-pattern sets that were directly filled into ignition-proof chamber with full inertial gas was not be ignited due to the immediate decrease of pattern material temperature.The new type flash-burning dewaxing furnace possesses the feature of mold shell dewaxing and baking,realizing the high reclamation rate of pattern materials,saving energy about 20%.In addition,the last progress in recycle of waste shell aboard and home was introduced.  
        关键词：Flash-burning Dewaxing Furnace;Shell Mold;Pattern Materials;Recycle of Waste Shell   
        2
        |
        185
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172478 false
        发布时间：2023-12-18
      • Chen Yaojian Huang Tianyou Kang Jinwu
        Issue 7, Pages: 436-438(2005)
        摘要：We have been developed a tool and computer collection system to investigate filling process of beads,pressure distribution of gas in the tool and filling pattern of the beads under the conditions of top injection and side-injection.The formation reasons and filling behaviors of the beads in top injection and side injection were analyzed.  
        关键词：Lost Foam Casting;Filling Process;Filling Pattern   
        2
        |
        85
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46171852 false
        发布时间：2023-12-18
      • Zhu Yanshan Zhao Yutao Dai Qixun Chen Xiaonong Li Guirong Feng Qin
        Issue 7, Pages: 439-441(2005)
        摘要：In-situ ZrB2,ZrAl3 and Al2O3 particulate reinforced aluminum matrix composites were fabricated by the direct melt reaction method in the system Al-ZrOCl2-B2O3.Analysis of the microstructure by scanning electron microscope （SEM） showed that the particulate with fine size lower than 2 μm was uniformly dispersed into matrix,and the volume fraction of in-situ particulates were increased with the increase of initial reaction temperature and reaction time.The aggregation and growth of particulate were formed with the melt temperature more than 900 ℃.It can be proved that the kinetic mechanism of the reaction system Al-ZrOCl2-B2O3 is reaction-dispersion-crack by the analysis of water-quenched samples.  
          
        2
        |
        77
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174234 false
        发布时间：2023-12-18
      • Zhang Jianyun~
        Issue 7, Pages: 442-444(2005)
        摘要：The length changes of different preheated SiCp/Al composites with varied compositions prepared by pressure free infiltration method were measured by TMA （thermal mechanical analysis） after heat recycled at 20～180 ℃,in which the unite length changes,mamely residual strain ,was used to analyze the dimensional stability.The results show that residual strain occuring in heat recycled SiCp/Al composites is reduced to be a constant value with the increase of heat recycling times.There exists different residual strain at different pretreatment,in which the minimum residual strain can be obtained by cooling-heating recycled pretreatment.SiCp/Al composites with a big particle size and hard matrix possesses a higher dimensional stability after heat recycle.  
        关键词：Aluminum Matrix Composites;Heat Recycle;Dimensional Stability   
        2
        |
        258
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46171795 false
        发布时间：2023-12-18
      • Li Yong Wang Huasheng Han Deqiang
        Issue 7, Pages: 444-446(2005)
        摘要：The production of metal powder by gas atomization is complicated,whose process was influenced by many factors.Effects of pressure and temperature on the powder granularity and distribution of H70 brass were analyzed based on gas kinetics and hydrodynamics.Results showed that powder granularity can be increased with the increase of the gas pressure and melt temperature.The optimized powder granularity and distribution effects can be obtained with melt temperature of 1 160 ℃ and atomized pressure of 1.3 MPa.  
        关键词：Gas Atomization;Atomized Pressure;Melt Temperature;Powder Granularity   
        2
        |
        111
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46171903 false
        发布时间：2023-12-18
      • Li Xiqian Wu Shusen Mao Youwu Xu Sixiang
        Issue 7, Pages: 447-448(2005)
        摘要：A fast quantitative measurement meter for hydrogen content in aluminum melt has been developed by using high sensitive micro-pressure sensor and corresponding control circuit based on the first bubble theory.The structure and performance of the system were expounded.The measuring system is reliable for measurements of hydrogen content in aluminum alloy by practical verification.  
        关键词：Aluminum Melt;Hydrogen-measuring;">   
        2
        |
        157
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173045 false
        发布时间：2023-12-18
      • Vol. 0, Issue 7, Pages: 449(2005)
          
        2
        |
        27
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173614 false
        发布时间：2023-12-18
      • Vol. 0, Issue 7, Pages: 450(2005)
          
        2
        |
        13
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173628 false
        发布时间：2023-12-18
      0