最新刊期
      卷 ， 期 3 ， 1998
      • Li Bangsheng Guo Jingjie Dong Shiyun Jiang Haiyan Li Zhiqiang
        Issue 3, (1998)
        摘要：The effects of S/L and slurry stirring time on rheological properties of the coating slurries formulated with ZrO2（CaO） powder and colloidal zirconia sol have been studied. Experimental results show that the slurries have plasticity and thixotropy. And S/L has dominant effect on the slurries’ rheological properties which are no longer affected by stirring time with an excess over 2 h.  
        关键词：Investment Casting;Zirconia Sol Coating Slurry;Rheological Properties   
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        发布时间：2023-12-18
      • Sun Naiyu Bian Xiufang Wang Weimin
        Issue 3, (1998)
        摘要：Rapid solidification of AlSr alloy results in refinement of microstructure, increment of default density, uniformization of composition and supersaturation of solid solution. Twozone microstructures are clearly found in the transverse section of rapidly solidified AlSr ribbons. As a reslut of the high cooling rates （about 106 K/s）, the grain size at the chilled side is up to nanometer level. The modifying experimental results show tha the AlSr master alloys formed at different cooling rate have different modifying effect. To obtain the same modification rating, the additional amount of rapidly solidified AlSr master alloys is decreased by 50%￣60% and the incubation period is reduced by 50% in comparison with normal ingot master alloy.  
        关键词：Master Alloys;Rapid Solidification;Modification Rating   
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        发布时间：2023-12-18
      • Yang Bingjian
        Issue 3, (1998)
        摘要：The stereoshape of shell solidified within the mold of the continuous slab casting was obtained using a real breakout shell under the casting speed of 1.42 m/min. The distribution of solidified shell thickness was measured in detail. Based on the measured results, the difference of solidification process between the narrow face and broad face was investigated, and the variations of the proportional coefficient K in the square root of time law for the slab in the mold were shown along the centrallines of the narrow and broad faces of the slab. The present data can be used to validate the mathematical modeling of continuous casting process.  
        关键词：Continuous Slab Casting;Solidified Shell Thickness;Mold   
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        发布时间：2023-12-18
      • Wang Linhui Zhang Yan Liu Weiqi
        Issue 3, (1998)
        摘要：The mechanical properties and low cyclic fatigue properties of alloy ZA27 and ZCuSn10P1 at ambient temperature were studied. Their cyclic stressstrain curves are obtained in constant strain amplitude condition. The results showed that the cyclic softening character with quasicleavage fatigue fracture for ZA27 alloy appeared while the cyclic hardening character with dimple and stripe fatigue fracture for ZCuSn10P1 alloy occured.  
        关键词：Cyclic Stress;Constant Strain Amplitude Test;Fatigue Properties   
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        发布时间：2023-12-18
      • Wang Zhongke Huang Naiyu Luo Jirong Ye Shengping
        Issue 3, (1998)
        摘要：The steel casting surface carburizing was studied in several series of tests using EPS, PMMA, EPSPMMA pattern. The reuslts showed that newly developed EPSPMMA compound pattern material has combined the advantages of both EPS and PMMA, and is a good material to reduce surface recarburizing for steel casting in EPC.  
        关键词：Pattern Materials;Steel Casting;Surface Carburizing   
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        发布时间：2023-12-18
      • Gao Shengji Shen Baoluo Yang Gang Tu Mingjing
        Issue 3, (1998)
        摘要：The mechanical properties and wear resistance in the oil lubricated condition for alloys Zn25%AlX%Cu were studied. It was found that with increasing of the copper content ultimate tensile strength of alloys gradually increased up to the maximum value 369 MPa with the copper content 6.64% while the elongation of the alloy Zn25%Al2.24%Cu had the maximum value 14.1% with 2.24%Cu. The elongation of alloys decreased in an excess above 2.24% copper. The hardness change of alloys was opposed to the elongation variation and the hardness of the alloy Zn25%Al2.24%Cu had the minimum value （HB98）. No εphase appear in interdendrite zones of the alloy Zn25%Al0.62%Cu, but εphases appeared in interdendrite zones of the alloy Zn25%Al2.24%Cu and increased with increasing of the copper content. With increasing of the copper content the wear resistance of alloys gradually increased.  
        关键词：Zinc Based Alloy;Copper;Mechanical Properties;Wear Resistance   
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        发布时间：2023-12-18
      • Zhang Long Zhao Zhongmin Ye Minghui Wang Jianjiang Li Shuhua Li Junshou
        Issue 3, (1998)
        摘要：The ceramiclined pipes had been produced by gravitational separation SHS method, and influences of additives SiO2 and CrO3 on combustion synthesis, structure and properties of pipes had been investigated. It was found that SiO2 in ceramics dendritic boundary existed in the form of quartz phases, SiO2 and CrO3 functioned as the diluent and the chemical activator respectively during combustion, SiO2 had duplex effects on ceramic densification, and CrO3 promoted ceramics to be dentified in certain degrees through increasing temperature of melts. Based on chosing suitable proportion to additives, mechanical properties of ceramiclined pipes by gravitational separation SHS method basically reached present level of those done by centrifugal SHS method. The thermal shock resisfance was improved.  
        关键词：Gravitational Separation SHS Method;CeramicLined Pipes;Additive;Combustion Synthesis   
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        发布时间：2023-12-18
      • Li Shuzhen Liang Xingwang Wu Chunjing Shen Dingzhao Xu Yinquan Chen Weirong
        Issue 3, (1998)
        摘要：The research was concentrated on the air set spraying of the cellulose ester reagent which can be used in the vacuum sealed molding process for the complex castings. In the test, after spraying the reagent, a spraying film instead of the plastic film will cover the pattern. Containing the mouldwash, the reagent will change into black film which can in 1￣2 min be directly used in the pouring of the nonferrous metals or cast iron without brushing the mould coatings.  
        关键词：Vacuum sealed Moulding Process;Spraying Films;Film   
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        发布时间：2023-12-18
      • Liu Jinshui Xiao Hanning Shu Zhen Jiang Bing Xiang Pinfeng Ye Jiuxin
        Issue 3, (1998)
        摘要：5%TiC/ZA43 composites were prepared with Ti, Al, C powder by combining the advantages of both XD and casting techniques. The ascast microstructures of TiC/ZA43 composite as well as the size and distribution of TiC particulate rinforcement phase were studied. It was found that TiC particulate in composite exhibited excellent stability, the distribution of TiC particulate in matrix became more homogeneous and the microstructures became finer with increase of the prepared AlTiC addition temperature.  
        关键词：Casting Technique;Composite;TiC;ZA43   
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        发布时间：2023-12-18
      • Wang Kuangfei Zhao Xiaojuan
        Issue 3, (1998)
        摘要：The kinetics of isothermal transformation in ZA27 alloy are studied with selfdesigned apparatus of heateffect. It was found that curves for the kinetics of isothermal transformation of ZA27 alloy conform to Ccurve. Which decomposed by spinodal mechanism at the early slage of quenchaging.  
        关键词：ZA27 Alloy;Curve of HeatEffect;Kinetics of Transformation;Spinodal Decompostion   
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        发布时间：2023-12-18
      • Yu Lihua
        Issue 3, (1998)
        摘要：The damping properties of the CuAlBeX alloy have been studied in ascast, air and water quenching states. The result shows that the damping properties are elevated with increasing of thermoelastic martensite interfaces and with decreasing of supersaturated vacancy. The damping properties are raised with increasing of strain amplitude in given thermoelastic martensite interfaces.  
        关键词：CuAlBeX Alloy;Thermoelastic Martensite;Vacancy;Damping Property   
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        发布时间：2023-12-18
      • Tan Suokui Ren Quanbao
        Issue 3, (1998)
        摘要：This paper studies the effect of iron content on the microstructure, room temperature, high temperature properties & shape stability. It is found that, as iron content increases, neddle and flake iron phase increases & thickens, properties of room & high temperature changes in different way, and shape stability is almost invariant.  
        关键词：Iron Content;Piston;Permanent Mold   
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        发布时间：2023-12-18
      • Wu Shusen
        Issue 3, (1998)
        摘要：An interaction model is proposed for a particle with a solid/liquid interface. When the contact angle between a ceramic particle and solid/liquid interface is less than 90°, the particle will be entrapped by growing solid interface. Otherwise, it is rejected. The necessary condition for making the contact anlge less than 90° is to make the interfacial energy of a particle with a solid smaller than that of the particle with the liquid. The interaction model has been verified using the zone melting UDS method with the AlSi/Al2O3 composites.  
        关键词：Metal Matrix Composites;Particle Behavior;Solidifying Interface;Entrapping;Rejection   
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        发布时间：2023-12-18
      • Zhang Shengli Lu Shaomin
        Issue 3, (1998)
        摘要：Based on analyzing of technology and construction feature of inlet pipe casting for lost process CAD/CAM system of die program is setup through improvement and second development of the imported system. The fabricated die verified through practice meets product requirements.  
        关键词：Lost Foam Process;Casting Die;CAD/CAM;Integrated System   
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        发布时间：2023-12-18
      • Shun Boqin
        Issue 3, (1998)
        摘要：Magnesium Alloy Diecasting Parts in foreign countries will be increasing at the rate of 20% to 25%, especially in automobile trade up to 2000’. The paper explains the characteristics of magnesium alloy diecasting parts and points out the demand for magnesium alloy diecasting parts in foreign automobile trade. It is expounded that China should seize an opportunity to capture rapidly the domestic and foreign markets for magnesium alloy diecasting parts.  
        关键词：Automobile;Magnesium Alloy;Diecastings   
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        发布时间：2023-12-18
      • Wang Dalin Jiang Zhongmin
        Issue 3, (1998)
        摘要：The state of art of dental alloys is introduced in this article from the point of material utilization. The classification, composition and application are discussed. We also recommend the problems and resolution encountered during the use of dental alloys. The main products, new processing methods and the future of developments of metals and alloys used in dentistry are briefly mentioned.  
        关键词：Alloy Material;Dentistry;Titanium Alloy   
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        发布时间：2023-12-18
      • Xu Yunxiang
        Issue 3, (1998)
        摘要：In this paper, the coding meaning and the coding system requirements for investment castings are introduced, and the structure of RMBMX coding system for investment castings and the determination of coded numbers are expounded in detail.  
        关键词：Coding;Investment Casting   
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        发布时间：2023-12-18
      • He Chunhua Li Woguang
        Issue 3, (1998)
        摘要：The principle and structure of spark cutting machine were described. The effects of cutting current and linear speed of the cutting disk on cutting rate were studied. This machine is simply structured, high cutting rate and more advantageous to cut some alloyed castings in comparison with other methods.  
        关键词：Spark Cutting;Riser Cutting   
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        发布时间：2023-12-18
      • Lin Gongwen Li Zhengbang Yang Haisen Cheng Mingtao
        Issue 3, (1998)
        摘要：Principle, technique and characteristics of manufacture of the reduction tank for magnesium making by centrifugal electroslag casting were summarized, and the article also analyzes the reasons why new process results in the advantages with high quality.  
        关键词：Centrifugal Electroslag Casting;Reduction Tank for Magnesium Making;Electroslag Crucible Furnace;Protective Agent;Dynamic Action   
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        发布时间：2023-12-18
      • Su Fusheng
        Issue 3, (1998)
        摘要：Discusses about the casting technology of centrifugally cast cylinder sleeve for Type Dongfanghong （3） internal combustion locomotives, analyzes the reasons for a couple of cast defect and proposes effective measures in tackling these quality problems.  
        关键词：Centrifugal Casting;Cylinder Sleeve;Technology Research   
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        发布时间：2023-12-18
      • Chen Xianhe
        Issue 3, (1998)
        摘要：The advantages and disadvantages of ZCuPb30 alloy are introduced. The basic causes and main influential factors for the formation of Pb segregation are introduced. An effective method of preventing the ZCuPb30 bimetallic bearings from Pb segregation is proposed.  
        关键词：ZCuPb30 Alloy;Bimetallic Bearing;Pb Segregation   
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        发布时间：2023-12-18
      • Issue 3, (1998)
        摘要：简易有效的深长孔铸造白银柯登精密铸造阀门有限公司申宝云硅溶胶制壳工艺存在自然干燥周期长，遇到曲线或孔洞类的复杂铸件易出现干燥不良及清理困难的不利因素。尤其是铸件中的直径较小，相对较深和较长的盲孔，在制壳时，由于背层型壳在不断挂砂加厚过程中，端部的孔径...  
          
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        发布时间：2023-12-18
      • Issue 3, (1998)
        摘要：不锈钢拉伸模用铜基合金的研制辽宁省丹东汽车制造厂孙凤桐王文杨择辉不锈钢制品精美大方，经久耐用，在轻工、化工、国防工业等部门获得广泛应用，但由于我国在这一领域的研究起步较晚，不锈钢制品拉伸模具材料一直沿用合金铸铁、球墨铸铁、或合金钢(Ｃｒ２，Ｗ１８Ｃ...  
          
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        发布时间：2023-12-18
      • Issue 3, (1998)
        摘要：储存条件对珠粒性能的影响第一汽车集团公司夏振佳刘生银消失模铸造法多采用可发性聚苯乙烯珠粒制造模型，珠粒中含５％～７％发泡剂，具有可发性。发泡剂主要成分是戊烷。戊烷沸点低，在储存过程中珠粒中发泡剂逐渐逸失，珠粒发泡能力下降直到失去发泡能力。发泡剂的逸...  
          
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      • Issue 3, (1998)
        摘要：防止氧化夹渣在有色合金铸件中的形成湘潭电机集团有限公司彭亿培图３改进后金属型方案有色合金在高温下易产生氧化夹渣。为了得到高质量的铸件，防止氧化渣在铸件中的形成就显得非常重要。在熔炼有色合金和优化浇注系统两方面采取措施。１熔炼工艺措施（１）在熔炼时，...  
          
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      • Issue 3, (1998)
        摘要：偶联剂——硅烷在树脂砂铸造中的应用武汉市华昌应用技术研究所李洁高贵毅我国铸造工业中的制造芯造型从７０年代起越来越多地使用了树脂砂，由于树脂砂的使用，从而推动了铸造机械及铸造业中的原辅材料的不断深入研究、更新和发展，本文着重谈谈偶联剂——硅烷在树脂砂...  
          
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      • Issue 3, (1998)
        摘要：美国熔模铸造协会（ＩＣＩ）简介中国铸造协会精铸分会周泽衡ＩＣＩ是一个产业协会，成立于１９５２年，现有会员单位２００多个，是团体会员制，即会员是公司和企业，会员有两种，一种称基本会员，即直接从事熔模铸造生产的企业，目前基本会员有１２６个，其中３８个是海...  
          
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