最新刊期
      卷 ， 期 1 ， 1993
      • Ji Wei
        Issue 1, Pages: 1-3(1993)
        摘要：The effects of La and middle or heavy rare earth elements on the Cast structure, the fluidity, the wearability and corrosion resistance of the Pb-contained silicon bronze have been investigated. The results have shown that a propen content of rare earth elements is able to refine the cast structure of the alloy, to improve the distribution of Pb in the alloy, and furthermore, to enhance its wearability and corrosion resistance.  
        关键词：稀土;铅硅青铜;凝固组织;铸造性能;耐磨性和耐蚀性   
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        发布时间：2023-12-18
      • Wei Xiaowei Song Shaoyuan
        Issue 1, Pages: 4-6(1993)
        摘要：Some trace contents of cd can remarkably increase the sorength of Al-Cu Alloy and that would not be decreased before a Cd content exceeding a around 0.3% The microstructure of the Cd-content alloy is after heat treating. The trace content of Cd is found to be rather well dispersed in the matrix.  
        关键词：镉;ZL201A;机械性能;合金组织   
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        发布时间：2023-12-18
      • Mu Baichun
        Issue 1, Pages: 7-10(1993)
        摘要：The change of the colloidal silicate in heating and its action on permeable cermet have been investigated and compared with the ethyl silicate binder. The results of the test have shown that the operating technology for colloidal silicate binding is comparatively simple and the strength and gas permeability of the mold are comparatively good.  
        关键词：硅溶胶;透气系数;多孔材料   
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        发布时间：2023-12-18
      • Hui Xidong
        Issue 1, Pages: 11-14(1993)
        摘要：The effects of potassium on the solid-liquid interface stability and on the shape,size and growth dynamics of eutectic Si in Al-Si eutectic alloy have been investigated under unidirectional solidification. The ways to enhance the mechanical properties of the alloy and the mechanism of modification of patassiurn have also been discussed. It can be summarized that（l）The shape of eutectic Si tends to be transformed from lamellar to fibrous and to nodular under given, solidifying conditions with strong modifying elements. （2） The potassium atoms tend to accumulate on the L-S interface of Si （111） plane and to blockade the growth steps of that plane and to reduce the growth rate of Si and , in turn. to made the phase become the leading phase of growth and in same time to remote the branching of Si twins.  
        关键词：Al-Si共晶合金;定向凝固;k变质   
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        发布时间：2023-12-18
      • Issue 1, Pages: 14(1993)
        摘要：<正> 利用ADINA/ADINAT.CADAM-3DMESH及FEMB等计算机非线性有限元软件包对488铝缸盖铸件凝固过程进行数值模拟取得成功。1992年12月18在长春通过鉴定。 我国汽车铝缸盖生产目前大都采用低压铸造工艺,废品率为15％～25％,生产效率低。一汽为加速上轻型轿车的进度,对引进的机型488中最复杂零件,高强度、高致密性、高精度和薄壁铝缸盖大  
          
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        发布时间：2023-12-18
      • Dong Shijie
        Issue 1, Pages: 15-18(1993)
        摘要：The microstructure and mechanical properties of ZL108 alloy with the content of Ti have been investigated; especially the influences of Ti content and nging temperature on high temperature mechanical properties have been studied. The results indicate that with an addi-tion of Ti,u-AI dendrite and eutcctic structure of ZL 108 alloy are refined, high temperature strength and ductility are increased remark ably, and the thermal expansion coefficient is decreased. The optimum Ti content and aging temperature are also discussed.  
        关键词：含钛ZL108;高湿强度;线膨胀系数   
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        发布时间：2023-12-18
      • Xu Zhiqing Zhou Yaomin Song Qing Li Xiangan
        Issue 1, Pages: 19-21(1993)
        摘要：This paper studied the effect of squeeze casting’s mold temperature on the structure and proper ties of C/Mg composites. The experiments show that the mold temperature is a sensetive parameter to the squeeze casting C/Mg composites, ttie appropriate temperature range is very narrow and the optimum one is 380C  
        关键词：挤压铸造;模具温度;复合材料   
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        发布时间：2023-12-18
      • Ma Yongqing Guan Delin Yang Daozheng Wan Liqun
        Issue 1, Pages: 22-24(1993)
        摘要：The multiple modification of the rare earth-Al alloy by Na three-component modifier with the addition of B,C was investigated. The results show that the microstructure and mechanical properties are improved much more than that by Na three-component modifier or B,C respectively. The effective modification times can be prolongated over 2. Shours. The combined use of two modifiers does not change the respetive mechanism of reaction of both modifiers. However, the modification effect is intensified by combined influence of them.  
        关键词：稀土铝合金;综合变质处理;变质有效时间   
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        发布时间：2023-12-18
      • Ceng Yidang Xiao Koze
        Issue 1, Pages: 25-27(1993)
        摘要：An “expert System” has been developed to identify casting unsoundness. There are five components in the system: knowledge base, infereuce eugine. Knowledge acquisition module, user interface and self-learning module. The knowledge base consists of produetional rules and parameters-base. Inexact reasoning, Back ward chaining and depth first search formed the control strategy,It has been proved that this software is successful and gains acceptance in the foundry.  
        关键词：专家系统;铸件孔洞类缺陷分析   
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        发布时间：2023-12-18
      • Issue 1, Pages: 28-29(1993)
        摘要：<正> 我厂自1987年研制290系列增压器,喷嘴环是增压器的主要部件之一,它是带有内外圈的整体铸造环,形状复杂,尺寸精度要求高,铸造难度大。喷嘴环研制包括以下几方面:  
          
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        发布时间：2023-12-18
      • Issue 1, Pages: 30-34(1993)
        摘要：综述了气孔对铝合金机械性能和质量指数Q的影响、气孔的形成机理和为了 {”防上”讯的形成,欧美开发成功并。“一泛应用的铝合金液体除”1新方广。这些新疗法包括特利喷射法、旋转叶轮除气法、MIXll无毒混合气体法。”三孔尺寸愈大,钎i合金的抗拉强度、延伸率降低的愈多。  
        关键词：铸造铝合金;气孔;除气   
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      • Issue 1, Pages: 35-36(1993)
        摘要：根据我国的能源状况,以及近十年来的节能成果,分析了我国能源消费及与国外先进水平的差距,介绍了当前的节能目标与若干铸造企业节能技术。  
        关键词：能源状况;铸造节能   
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        发布时间：2023-12-18
      • Issue 1, Pages: 37(1993)
        摘要：<正> 我厂自备热电站锅炉制粉系统有四台大型球磨机,其转体部分（包括煤粉）重量为57t,原设计为巴民合金轴承材料,每件瓦铸造合金用量246kg,过去修复轴瓦要到原生产厂家浇注巴氏合金,不仅耗资多,而且周期长,严重影响生产。我们经过实践,自行修复铸造,保证了产品质量要求,成品率达到96%以上,每台节省资金4万多元。 巴氏合金以锡或铅作基体、悬浮锑锡（Sb-Sn）及铜锡（Cu-Sn）的硬晶粒。锡基合金的热胀性和耐蚀性比铅基合金好,所以锡基合金适用于高速轴承。由于球磨机转速低,选用锡基合金或铅基合金均可满足要求,前者价格较贵。  
          
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        发布时间：2023-12-18
      • Issue 1, Pages: 38-39(1993)
        摘要：<正> 镶圈活塞现已日趋广泛地应用于高负荷柴油机,活塞镶圈的结构也比较多。我厂近年来在生产单环槽镶圈活塞的基础上,为了满足进口汽车配件国产化的需要研制生产了镶燃烧室防护圈的镶圈活塞,见图1。  
          
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        发布时间：2023-12-18
      • Issue 1, Pages: 40-18(1993)
        摘要：<正> 薄壁压铸件,其壁厚往往不超过2mm。按照技术要求,此类压铸件,因受到浇注系统以及生产工艺的影响,在铸件表面易产生大量的油性花纹、流痕、冷隔,同时又易产生严重的铸件变形,或局部裂纹等铸造缺陷。因此产生大量的次、废品。 我厂QS90摩托车发动机部件、化油器检查盖就属于此类。  
          
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        发布时间：2023-12-18
      • Issue 1, Pages: 41-42(1993)
        摘要：<正> 铝合金在配料熔化及精炼过程中,向大气排放烟尘及有害气体。由于炉型、加热方法、炉料的清洁度、精炼剂的种类及操作方法、操作水平的不一样,排放的烟尘和有害气体的程度也就各异。 我厂有色压铸分厂熔化炉采用颜氏快速熔铝炉,该炉用轻油或重油作燃料,由燃烧器喷射出的火焰直接加热熔化炉料,其特点是熔化速度快。在压铸机操作现场中,使用的压射冲头润滑剂、压铸模脱模剂及压铸机油路系统的渗漏油液,致使压铸过程中产生的废铸件、余  
          
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      • Issue 1, Pages: 43-44(1993)
        摘要：<正> 1 试验目标和要求 西安高压开关厂空气断路器及真空开关等产品材料为高强度铝合金。技术要求:σb>300N/mm2;δ5>4％;HB>90并经过350N/mm2水压试验三分钟无渗漏,200N/mm2气压试验无漏。西安电器设备厂39E36-2-1支架和39E37底板,材料亦为高强度铝合  
          
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      • Issue 1, Pages: 45(1993)
        摘要：<正> 我厂铝活塞铸造采用底注上抽芯式金属型重力铸造。由于活塞头部、顶部与裙部壁厚差大,加上形状复杂。此工艺只考虑加工方便,没有完全符合顺序凝固要求,使活塞产生以同时凝固为主、顺序凝固为辅的冷却方式。为了使活塞得到充分补缩,一般使用一对粗而大的冒口,其结果是浇冒口重量与活塞本体重量的比为1～2:1左右;模温高,延长浇注周转时间;质量也不够稳定。从1987年起,我厂开始进行微型保温单冒口铸造工艺试验,经过几年来的摸索和实践,证明这种工艺是可行的。现已在我厂6只主要品种上批量和小批生产。并且采用保温冒口后,活塞得到充分补缩,铸造质量稳定,经检验活塞宏观、金相及机械性能匀符合GBI148—82《内燃机铝活塞技术条件》。最为突出的是既保证了质量,又减少了浇冒口系统与活塞毛坯的重量比,提高了工艺出品率和班产,经济效益显著。  
          
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