最新刊期
      卷 ， 期 4 ， 2005
      • Wu Zhenping Liao Hengcheng Jiang Yunfeng Chen Jie Sun Guoxiong
        Issue 4, Pages: 193-195(2005)
        摘要：Effects of Sr on the size of eutectic cell in Al-15.5Si alloy in the condition of various cooling rates have been investigated.The results showed that the size of the eutectic cells decreases in both sand mold and metal mold with increasing in Sr addition.The cooling rate has a remarkable effects on the size of the eutectic cell.The size of eutectic cell in metal mold is much smaller that that in the sand mold with the same Sr addition.  
        关键词：Eutectic Cell;Al-Si Alloy;Microstructure;Sr   
        2
        |
        147
        |
        7
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174940 false
        发布时间：2023-12-18
      • Vol. 0, Issue 4, Pages: 195-237(2005)
          
        2
        |
        13
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46175156 false
        发布时间：2023-12-18
      • Zhu Heguo1 Wang Hengzhi1 Wu Shenqing2
        Issue 4, Pages: 196-198(2005)
        摘要：The synthesis process and mechanism of aluminum matrix composites fabricated by XD method in Al-TiO 2-B 2O 3 reaction system were investigated.The results indicated that the green perform combusted at the temperature of 1 000K and the reacted products were composed of grains Al 2O 3 and TiB 2 and rod-like Al 3Ti phase,when the B 2O 3/TiO 2 mole ratio was less than one.The effect of milling time and green density on the product structure were also discussed.  
        关键词：Aluminum Matrix Composites;Reaction Mechanism;Mole Ratio;XD（Exothermic Dispersion Reaction）   
        2
        |
        118
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172135 false
        发布时间：2023-12-18
      • Wang Xuezheng1 Zhao Ming2 Xue Weijing1 Fang Jianqiang1
        Issue 4, Pages: 198-199(2005)
        摘要：The problems of fibre dispersion and preform forming in preform cylinderic parts were well overcome by the sucessful preparation of Al2O3 short fibre preform with vacuum differential pressure mehtod.The Al2O 3f/ZL109 cylinderic composites was produced by squeezing casting.  
        关键词：Casting;Composites;Al2O3 Fibre;ZL109   
        2
        |
        37
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172843 false
        发布时间：2023-12-18
      • Zhou Hong Cong Fuguan Zhao Yu Song Qifei Li Wei
        Issue 4, Pages: 200-202(2005)
        摘要：With the incremental comsumption for the magnesium alloy,the recycle of service parts and produced scraps as well as the microstructure and properties of remelting Mg alloy have been increasingly concerned.The impurity in the recycled Mg alloy,the microstructure and properties of the recycled alloy with different reclaimed scrap additions were researched.The results show that impurities are increased with the increase of Mg scraps ratio in the recycled Mg alloy.The impurities are composed of oxide of Mg and a little of oxide of aluminum acompanying with gas-hole.The mechanical properties and corrosion resistance are decreased with the increase of the reclaimed scraps ratio in the recycled Mg alloy.The as-cast recycled Mg alloy should be refined to control the impurity to a certain range.The structure heredity phenomenon obviously exists in the recycled Mg alloy.A disirable effect can be obtained through the gas-browing equipment refining the recycled Mg alloy.  
        关键词：Mg Alloy;Recycle;Microstructure;Properties   
        2
        |
        278
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173282 false
        发布时间：2023-12-18
      • Yang Yuanzheng Qiu Zaihong Li Xifeng Zhao Deqiang Xie Zhiwei Kuang Tongchun Bai Xiaojun
        Issue 4, Pages: 203-204(2005)
        摘要：The influence of Nb and cooling rate on the amorphous formation ability of amorphous Zr 57Al 15-xCu 15.4Ni 12.6Nbx alloy was examined by XRD and DSC.The compression strength of the as-cast and heat treated bulk amorphous alloy was researched.It was found that amorphous Zr 57Al 15-xCu 15.4Ni 12.6Nbx alloy containing 5%Nb（atom fraction） has the highest amorphous formation ability,in which the compression strength can reach up to 1705 MPa and the relative compression rate is about 0.104%.The compression strength of heat treated amorphous alloy is decreased remarkably due to the occurrence of precipitated phase or crystallization phase in the amorphous alloy.  
        关键词：Amorphous Formation Ability;Amorphous Bulk Zr 57Al 15-xCu 15.4Ni 12.6Nbx Alloy;Compression Strength   
        2
        |
        106
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173604 false
        发布时间：2023-12-18
      • Wang Wuxiao 1,2 Chen Jianjie2 Jiang Bailing2 Yuan Sen2 Jie Wanqi1
        Issue 4, Pages: 205-207(2005)
        摘要：The effect of deformation rate on deformed microstructure of AZ91D magnesium alloy by the SIMA method was researched and differential scanning calorimetry （DSC） was employed to investigate the relation of deformation rate and eutectic melting activity energy.The results show that with the increase of deformation rate,the initial microstructure of the alloy changes from dendrites to fragmentary grains,in which there are twin crystals and dislocations,meanwhile the eutectic melting activity energy of the alloy decreases gradually.When the deformation rate is 40%,the eutectic melting activity energy is slightly decreases.The melting point of eutectic decreases slightly with the increase of deformation rate.  
        关键词：Mg Alloy;SIMA;Deformation Rate;Eutectic Activity Energy;Deformed Microstructure;DSC   
        2
        |
        202
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173201 false
        发布时间：2023-12-18
      • Li Xiaotang1 Shen Ronghua1 Wang Jichun1 Sun Qingshan1 Li Danyang2
        Issue 4, Pages: 208-210(2005)
        摘要：A design of a combination push-off mechanism for large complex die casting die was proposed based on the principle of fuzzy synthesis evaluation.The design method includes the model of fuzzy synthesis evaluation and the procedure of three grade fuzzy synthesis evaluation as well as the table of limits of authority and subordinate degree.The design method not only can ensure the quality of the parts but also consider productivity,economy,reliability and operation.Meanwhile,the design examples were given and analyzed.  
        关键词：Fuzzy Design;Die Casting Die;Push-off Mechanism   
        2
        |
        77
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174784 false
        发布时间：2023-12-18
      • Lei Jingguo 1,2 Liu Ping2 Jing Xiaotian1 Zhao Dongmei2 Zhi Xiao3
        Issue 4, Pages: 211-213(2005)
        摘要：Based on the analysis of changes in electric conductivity in the aging process of solid solution treated Cu-2.37Ni-0.58Si-0.39Cr alloy,both the simple equation of electric conductivity via aging time and binary equation of electric conductivity via aging time and temperature at a certain temperature were derived by polynomial fitting and spline interprolation.The results show that the calculated values is well in agreement with the experimental ones.  
        关键词：Cu-Ni-Si-Cr Alloy;Aging;Conductivity   
        2
        |
        131
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174192 false
        发布时间：2023-12-18
      • Wan Hui Liao Dunming Liu Ruixiang
        Issue 4, Pages: 213-215(2005)
        摘要：Practical BOM for die casting die system based on Unigraphics NX2.0 was developed.The structure relation among various components in die casting die assemble and basic working information of the component can be easily obtained using the system.Practical sub-development based on UG for the selection and assemble of the component as well as accurate open-materials before CAM was introduced.  
        关键词：UG;Die Casting Die;BOM   
        2
        |
        137
        |
        7
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174258 false
        发布时间：2023-12-18
      • Zhu Yu Huang Mingyu Ni Hongjun
        Issue 4, Pages: 216-218(2005)
        摘要：The determination of processing parameters for Al-Pb-steel bearing materials in continuous casting depending on the experience can be gotten by taking a series of trials in practical production,which is difficult to get bearing materials with good comprehensive performance.An optimization method to continuous casting for the bearing materials was put forward by GA based on matlab artificial neural network based on the data from the experience.  
        关键词：Continuous Casting;Al-Pb-Steel Bearing Materials;BP Network;GA   
        2
        |
        93
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46172920 false
        发布时间：2023-12-18
      • Qian Wanxuan
        Issue 4, Pages: 219-221(2005)
        摘要：The real circumstance of liquid metal as the pressure transfering agent during pressure casting was introduced.It is uncorrect to adopt the Pascar theory as the theoretical basis of pressure casting due to the ignorance of the adhersion effects resulting from strengthly temperature-reduction in the condition of high specific and intensively heat-exchange for liquid metal,so the good pressure-applying for thin-walled castings can not be realized.The new developing prospect on design and manufacturing of the die casting machine was predicted.  
        关键词：Adhersion;Solid;Heat-exchange;Temperature-reduction   
        2
        |
        73
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174688 false
        发布时间：2023-12-18
      • Li Xinzhong Guo Jingjie Su Yanqing Liu Chang Wu Shiping Fu Hengzhi
        Issue 4, Pages: 222-225(2005)
        摘要：The existing phase-field models for simulation of solidification microstructures of metal melt are described comprehensively including the phase-field of pure materials,binary alloy with ideal solution model or regular solution model and dilute model.The necessity of establishing the phase-field model for simulation of solidification microstructures of the alloy with complex solution patterns is pointed out.It is proposed that the phase diagram may be used to establish volume free energy of phase field model for thermodynamic model calculation correspondingly parameters of phase field are corrected so that the accurate simulation of phase field model for solidificaion microstructure of complex metallic melt has been built up.The developed phase field model can be used to simulate both free growth and directional growth in Ti-Al metallic melt.A lot of results obtained are well in agreement with ones from experimental observation and theoretical analysis.  
          
        2
        |
        462
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173749 false
        发布时间：2023-12-18
      • Yang Jing Li Chuanda Liu Yun Dang Jingzhi
        Issue 4, Pages: 226-227(2005)
        摘要：To develop the controlling system of quantitative pouring with electromagnetic pump for aluminum alloy in squeezing casting,based on experiments and mathematical analysis,a model for flow volume of electromagnetic pump was established and controlling program of quantitative pouring was developed.The quality precision of the aluminum alloy in squeezing casting with electromagnetic pump quantitative pouring can reach up to 2%.The application of the technology to aluminum alloy in squeezing casting can effectively improve the quality and precision of the castings as well as the utility rate of the materials and the production yield of the castings.  
        关键词：Quantitative Pouring;Squeezing Casting;Electromagnetic Pump   
        2
        |
        277
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173443 false
        发布时间：2023-12-18
      • Tian Fuxina
        Issue 4, Pages: 228-229(2005)
        摘要：The cover castings was left in the moving container in squeezing casting but the general hydraulic machine has no the up-pushing mechanism.The processing parameters of squeezing casting for the aluminum cover and practical die structure with up-pushing mechanism were designed,in which a small piston sub-oli-cyclinder was designed to make the connection of piston bar with up-pushing mechanism and the up-oil tube and below-oil tube can be connected with the common circuit and controlled circuit in hydraulic machine by the high-pressure soft tube ,and then a up-pushing mechanism was assembled.The problems in up-pushing materials were resloved.  
        关键词：Squeezing Casting;Metallic Casting;Liquid Forging;Die Design;Sub-oil Cyclinder   
        2
        |
        308
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174878 false
        发布时间：2023-12-18
      • Vol. 0, Issue 4, Pages: 230(2005)
          
        2
        |
        34
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46175403 false
        发布时间：2023-12-18
      • Chen Bing
        Issue 4, Pages: 231-233(2005)
        摘要：Polymer reinforced rapidly-dried sol silicate and fibre reinforced rapidly-dried sol silicate from oversea were introduced.A series of polymer reinforced sol silicates with common features including greatly shortened drying time among molding shell layers,high green strength and temperature strength,low residual strength as well as easy shell-releasing were developed.Fibre reinforced rapidly dried sol silicate is a bonding agent developed by the end of last century,whose features include strong adhersion to wax-pattern and sand particle and good permeability and short dry time due to the enhancement of organic fibre.  
        关键词：Rapidly Dried Sol Silicate;Polymer;Fibre   
        2
        |
        370
        |
        7
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173476 false
        发布时间：2023-12-18
      • Ma Bo
        Issue 4, Pages: 234-236(2005)
        摘要：The characteristics of flexibility,drying ability were researched aiming at FS-II rapidly dried sol silicate.The effects of air-flow on the surface crack-drying of shell-molding were measured.The results show that compared with tranditional sol silicate,the FS-II rapidly dried sol silicate possesses better brushing-coating ability.Before next layer being brushed,the transition layer only need to be dried for 4～5 h with FS-II sol silicate while for 10～12 h with tranditional sol silicate.  
        关键词：Investment Casting;Rapidly Dried Sol Silicate;Shell Mold;Drying   
        2
        |
        362
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174545 false
        发布时间：2023-12-18
      • Zhou Zeheng
        Issue 4, Pages: 236-237(2005)
        摘要：Although the requirements for its dimensional precision and surface roughness are low,the carbon steel and low alloy steel castings in investment casting with sodium silicate molding shell can fully meet the requirements of some product.The product volume increases by 20% per year in last five years.A trade appears with over 1 200 enterprises and 0.5 millions ton product volume per year and 5 billion yuan product values per year.  
        关键词：Sodium Silicate;Investment Casting;Carbon Steel Castings   
        2
        |
        176
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174098 false
        发布时间：2023-12-18
      • Li Lei1 Meng Wenxia1 Xu Yunxiang2
        Issue 4, Pages: 238-245(2005)
        摘要：Although the fillet radius was increased,the shrinkage porosity （hole） appeared in inner round corner of five typical castings in investment casting cannot be eliminated.The experimental results show that the shrinkage porosity （hole）can be eliminated by changing inner round corner to 45° Chamfer angle.  
        关键词：Investment Casting;Inner Round Corner;Chamfer Angle;Shrinkage Porosity   
        2
        |
        73
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173699 false
        发布时间：2023-12-18
      • Xiong Xiaoqing1 Wu Zhichao2 Dong Xuanpu2 Ye Shengping2 Feng Xiaoning1
        Issue 4, Pages: 239-240(2005)
        摘要：The RP technology combining with precision casting is a major way to rapidly manufacture metal mould.An optimized process for manufacturing mould of Al alloy in lost foam casting was approached to eliminate pin-hole in Al alloy castings and improve the quality of the Al alloy castings.The key problems appeared in rapidly manufacturing metal mould for new product were resolved.So,a new frontier on application of the rapid manufacturing technology to the casting was developed.  
        关键词：New Al Alloy;Lost Foam Casting;Rapid Manufacturing   
        2
        |
        260
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174370 false
        发布时间：2023-12-18
      • Wang Zehua Mao Xiemin Zhang Jinlong Ouyang Zhiying
        Issue 4, Pages: 241-243(2005)
        摘要：Modification of hypereutectic Al-Si alloy by Sr and PM was conducted.The addition sequence,addition and long effectiveness of the compound modifier were investigated.The results show that addition sequence of the compound modifier obviously affects the dimension of Si phase.Adding PM modifier before adding Al-Sr master alloy,the shape of primary silicon is rosset-like in which the fine round-point eutectic silicon appears in the aluminum alloy.On the contrary,the dimension of the primary silicon in A390 alloy is obviously smaller than that of the modified alloy with single PM modifier.The average size of the primary silicon can be reduced to 35μm with modification of 1%PM addition and 0.4% of the alloy weight for Al-10Sr master alloy addition.Moreover,the PM and Sr compound modification has a better long effectiveness.  
        关键词：PM Modifier;Sr Modifier;Compound Modification;Hypereutectic Al-Si Alloy   
        2
        |
        232
        |
        7
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174726 false
        发布时间：2023-12-18
      • Li Yexin Cui Jianzhong Qin Ke
        Issue 4, Pages: 243-245(2005)
        摘要：The difference of microstructures of 4045 aluminum alloy ingots with 100 mm in diameter cast by DC and LFEC （low frequency electromagnetic casting） processes was compared.The effects of electromagnetic frequency,ranging in 10～50 Hz,on the microstructure of 4045 aluminum alloy castings were focused on.The results showed that electromagnetic frequency greatly affects the microstructure of as-cast ingot.Uniform microstructure can be obtained and primary α-Al grain size and secondary dendrite are reduced,and eutectic Si phase transformed from bar into point-like with the decrease of frequency from 50 Hz to 15 Hz.  
        关键词：Electromagnetic Casting;Frequency;4045 Al-Si Alloy;Microstructure   
        2
        |
        222
        |
        8
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46175236 false
        发布时间：2023-12-18
      • Wang Qingyu Jiao Yong
        Issue 4, Pages: 246-247(2005)
        摘要：Improvement of core-making technology was conducted by adopting basic phenolic resin sand for aluminum alloy air guide ring in the turbogenerator produced by Harbin Rlectric Machine Co.,LTD.The problems in production with initial core-making technology were analyzed and improved,in which it was undisirable to use gypsum mold,metal mold and EPS foam pattern respectively while was disirable to use resin sand.The validation and optimization of the technological plans were performed by computer body molding and numerical simulation.  
        关键词：Air Guide Ring;Core-making Technology;Resin Sand   
        2
        |
        59
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46173557 false
        发布时间：2023-12-18
      • Vol. 0, Issue 4, Pages: 247-248(2005)
          
        2
        |
        35
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46176177 false
        发布时间：2023-12-18
      • Xu Guangji Yang Shaofeng Ding Yutian Yang Xiaotian WT
        Issue 4, Pages: 249-251(2005)
        摘要：The CuAlNi memory alloy with column structure can be prepared through the remelting of the primary alloy using directional solidification dev ice and the optimized processing parameters can be obtained.The composition and transformation temperature points can be obtained by chemical ingredients and DS C analysis and the typical column structure can be obvesrved by OM.The memories of the alloy in single crystal,conventional casting and directional solidificati on were compared by measuring cycling fatigure period.The reason resulting in th e increase of memory of CuAlNi alloy with column structure was approached.It was found that directional solidification can improve the workability and memory s tready and cold-heat cycling period and eliminate the longitudinal crystal boun dary of the alloy.  
        关键词：Directional Solidification;Processing Parameters;M emory Alloy;Shape Memory Ability   
        2
        |
        255
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46175096 false
        发布时间：2023-12-18
      • Li Mingmao Yang Bin Wang Zhixiang
        Issue 4, Pages: 252-253(2005)
        摘要：The smelting-casting method of the CuCrZr alloy using medium frequency induction furnance in atmosphere is introduced that can obviously reduce suction gas of the alloy,in which compound cover agent can be used to effectively decrease oxidation and shrinkage porosity of the alloy.The burning-loss rate of Cr in the CuCrZr alloy was significantly decreased by setting Cr-claded-Cu into the furnace before pouring liquid copper to melt.Cu-Zr master alloy was added into the alloy and the maximum Zr content can be obtained by only pouring-melting method in ladle.The pouring temperature should be keeped in the range of 1 150～ 1 200 ℃ to ensure the soundness of the ingot and low oxidized shrinkage porosity.The high strength and high conductivity of CuCrZr alloy can be produced by making plastic formation and aging for the ingot with steady and uniformly chemical composition and sound structure prepared by smelting-casting method in the condition of air.  
        关键词：CuCrZr Alloy;Smelting;Cover Agent;Master Alloy   
        2
        |
        727
        |
        12
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46175003 false
        发布时间：2023-12-18
      • Deng Gang Song Yanpei Wang Wenmiao Li Luoli
        Issue 4, Pages: 254-256(2005)
        摘要：The finite element method is used to analyze the relationship between strength and stress of the particle reinforced iron matrix composites and the shapes,sizes and fraction volume of the particles.The results show that the acumination of the particle can result in stress concentration of the particle tip and strain concentration in the matrix.Meanwhile,the stress concentration increases with increasing in length-diameter ratio.The reduction of the particle size and the increase of the fraction volume are helpful to improving the strength of the composites.  
        关键词：Particles Reinforced Iron Matrix Composites;Finite Element Method;Stress Concentration;Strain Concentration;">   
        2
        |
        199
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46174826 false
        发布时间：2023-12-18
      • Vol. 0, Issue 4, Pages: 257(2005)
          
        2
        |
        23
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46176242 false
        发布时间：2023-12-18
      • Vol. 0, Issue 4, Pages: 258(2005)
          
        2
        |
        30
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 46176222 false
        发布时间：2023-12-18
      0