最新刊期
      卷 ， 期 3 ， 1992
      • Gu Min Gao Guanghui
        Issue 3, Pages: 1-3(1992)
        摘要：The effect of different kinds of alloying elements （0. 01-0. 5Ti, 0. 0010. 2B, 0. 01 0. 8Zr, 0. 011. 5Cr, 0. 011.0wt% Re） on mechanical properties and internal friction （Q-1） of Zn-（18-27） AlMnCuSiMg new type high damping alloy was investigated by single factor varied levels and L8（27） table of orthogonal array. As a result, the high damping capacity of the alloy depends on the mobile phase boundries and the quantities of the grain-boundries. The above alloying elements can refine the micro-structures and increase the quantities of the mobile boundries and the value of the internal friction, in addition to improving mechanical strength and elongation. It has been also, shown that Zr, Ti and B added at same time has some good interaction by analysis of variance and the effect is better than any single element.  
        关键词：减振合金;Zn-Al合金;合金元素;机械性能;内耗;高阻尼   
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        发布时间：2023-12-18
      • Tong Tianfu Li Quizhi
        Issue 3, Pages: 4-6(1992)
        摘要：In this paper, the relations between collapsibility and temperature of shell mould, effect factors and measures for improving collapsibility were discussed.  
        关键词：熔模铸造;溃散性;耐火材料;水玻璃   
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        发布时间：2023-12-18
      • Deng Keijia
        Issue 3, Pages: 7-11(1992)
        摘要：It is the first in this paper to apply thermodynamical analysis to crystallization of the Al-Si eu-tectic alloys. The results of analysis show that wty the silicon separatas out as a preliminary phase, and why the Al-Si alloys have their own pseudoeutectic structures are all for thermodynamical reasons. Finally it comes to the conclusion that for improving the quality of products, application of refining to Al-Si alloys for ridding them of gases and inclusions is of great importance.  
        关键词：共晶Al-Si合金;结晶过程;热力学分析   
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        发布时间：2023-12-18
      • Liang Ji Cai Huimin
        Issue 3, Pages: 12-15(1992)
        摘要：In this paper tests with Pb-Sb eutectic alley as a combined modificator were perfortmed to de termine the combined effects of these two elements on the structure and properties of ZL102 Al-Si alloy. The results obtained indicate that the structure of test castings with Pb/Sb combined addition cast in permanent mold is typically modified and the mechanical properties are much better than the unmodified castings. The advantages of the process include Saving modificator addition （ranged from 0. 4% to 1.0%）, more conve nient operation, lower cost, and geater use value compared with the separate Lead or Antimony addition as a modificator.  
        关键词：铅锑共晶合金;复合变质剂;AL-Si合金   
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        发布时间：2023-12-18
      • Chen Xiuying
        Issue 3, Pages: 16-17(1992)
        摘要：Since producing propellers in 1969, we had modeled in cement sand in our plant, As no cement for casting in our country, the cement for casting wao determined by a sery of experiments to the architectural cement, The morlding cement sand has the advantages of high strength, low cost and convenience. At the same time, the guality of products are good. This paper desoribles experiments of cement sand.  
        关键词：水泥砂;螺旋桨铸造;硅酸盐水泥   
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        发布时间：2023-12-18
      • Zhang Chuqiang Jin Fangzhe
        Issue 3, Pages: 18-20(1992)
        摘要：The alloy added element silicon on the base of ZA-27 can greatly improve resistant wearability.Through the test that casting has been set in machine a long time, shows that this alloy can replace the Zcusn6zn6Pb3 alloy.  
        关键词：高铝锌基合金;滑动轴承;耐磨零件   
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        发布时间：2023-12-18
      • Han Jintan
        Issue 3, Pages: 21-22(1992)
        摘要：The emulsion is put into the hydrolytic solution of ethylsilicate, green strength and permeability of the shell can be raised,remanent strength of the shell can be cut down,and shell detachability can be improved enormously. The shell can be made with ammonia drying or hot-air drying. It should be satisfied shell for the complex thin-walled single castings of aluminium alloy by investment casting.  
        关键词：硅酸乙酯水解液;乳胶;湿强度   
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        发布时间：2023-12-18
      • Issue 3, Pages: 23-25(1992)
        摘要：<正> 1 概 述 铸造铝合金的精炼是熔炼过程中最重要的工序、目前存在的精炼方法有二三十种。国内应用最广泛的当属六氯乙烷压入法。参照国外先进经验,近年相继推出了多种方法:如两气或三气法、多孔吹头法、高效熔剂法、喷吹熔剂法、旋转喷吹法,以及一度广为流行的无毒精炼剂法等等。总的目标是想提高精炼效率、改善合金质量、减轻环境污染等。解决问题的途径可概括为两个方向:一个是从改善精炼介质的性能入手,即以改善精炼的热力学条件为主攻方向;另一个是从扩大精炼介质与熔体间的  
          
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      • Issue 3, Pages: 26-28(1992)
        摘要：作者结合多年来的实践经验,从内燃机活塞材料的选用及其热处理规范的选择方面提出了自己的看法,以供同行们参考。  
        关键词：活塞;铝合金;热处理工艺   
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        发布时间：2023-12-18
      • Issue 3, Pages: 29-31(1992)
        摘要：从金属受热产生原子跳位的观点,探讨了液态结构。以此为理论基础,研究了ZL201合金的熔炼工艺,提出增加“过热、搅拌、急冷”三个工序,并在实践中取得了良好效果。  
        关键词：ZL201合金;液态结构;过热变质熔炼法   
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      • Issue 3, Pages: 32-34(1992)
        摘要：在铝活塞合金的熔炼过程中,采用工频炉熔化,电阻保温炉保温的一次性熔化工艺,保证了铝合金的质量,减少了生产工人的劳动强度,提高了活塞材料的利用率,还节约能源,是一种较为先进的生产工艺。  
          
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      • Issue 3, Pages: 33-34(1992)
        摘要：<正> 1 问题的提出 气流纺纱机是我厂引进捷克技术生产的国内最先进的新型纺纱机,其下臂（图1）是主机的关键零件之一,年产量2～5万件,浇注合金:ZL111,铸件重0.08kg。  
          
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        发布时间：2023-12-18
      • Issue 3, Pages: 35-36(1992)
        摘要：<正> 1 环形浇口的应用 对长筒管状,或诸如阀体类的管接头压铸件,用环形浇口使金属液从大径（或厚壁）管端浇入,其余各管端配置溢流、排气系统的设计方法,能令金属液沿管型壁充填型腔,不正面冲击型芯,顺流直下,迫使气体由它管型末端排出,这样既能保证铸件的内外质量,也相应延长了模具的使用寿命。  
          
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      • Issue 3, Pages: 37-38(1992)
        摘要：<正> 用湿型制作铸件外型,用敷砂金属芯代替砂芯铸造铝青铜和各类黄铜、铝合金螺母、轴套及轮类零件,已应用20余年,效果较好。 该工艺优点:不烘型,不造芯,金属芯可多反复使用,降低了工时费用,节约了烘型烘芯能源,大大缩短生产周期,提高劳动生产率。可大大减少胃口直径,提高了工艺出品率,节约了贵重的有色金属。铸件内在质量好（尤其螺母类铸件需要深度切属时,优点更为明显）,机械性能亦大大提高。 缺点:金属芯的一次性成本略高于砂芯。对某  
          
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        发布时间：2023-12-18
      • Issue 3, Pages: 39(1992)
        摘要：<正> 我厂精铸车间采用熔模铸造方法生产打煤机、制砖机上的圆锥齿轮,铸造齿形尺寸精度可达9～1O级,齿形表面粗糙度达Ra12.5～Ra6.3,较好地满足了设备的传动精度及零件使用要求。 熔模铸造圆锥齿轮,关键是设计和制造压型。圆锥齿轮压型的型腔形状是内伞齿形。众所周知,制造内圆锥齿轮,普通机械加工方法很难加工。我们采用低熔点合金铸造齿形压型。这种工艺有方便实用、生产周期短、成本低的特点。  
          
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        发布时间：2023-12-18
      • Issue 3, Pages: 40-43(1992)
        摘要：介绍工业发达国家熔模精铸的最近发展和致密铸件技术。同时介绍印度的发展情况和他们今后五年的发展目标。  
        关键词：熔模;精铸;概述;发达国家   
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      • Issue 3, Pages: 44-45(1992)
        摘要：<正> 3.3 新型的压力增压系统 压力增压器最初直接用氮气充气。为了达到快速建立压力而无压力峰值出现的要求,增压器的活塞按最轻的重量进行设计,并由适当的并经表面处理过的新材料所制成。 基本的受压力控制的增压系统（图3）,带有分开的、独立的压力蓄能器装置,其用意乃是为了使最终增压阶段的压力值,在增压时,气体的压力能得到适当地控制。  
          
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