最新刊期

    卷 , 期 1 , 1990
    • He Xiangping,Feng Jiaqun,Wu Jiao,Hu Benyan
      Issue 1, Pages: 3-7(1990)
      摘要:In this paper, a special casting bronze with high-strength and high-hardness is introduced.Alloy component,melting,pouring, heat treatmant process and some importment property have been developed research. Experiment indicated that the strength and hardness of this alloy approach the beryllium-bronze level and the serious poisoningof beryllium -bronze is overcomed.  
      关键词:塑料模材料;青铜   
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    • Issue 1, Pages: 7(1990)
      摘要:<正> 西北五省区即西安市铸造学术年会,于11月7日至10日在咸阳市召开,到会代表130余人。 会议听取了周庆德教授的“访苏见闻及苏联教学改革情况的报告”、宋宪华教授去日本参加“第四届铸铁物理冶金研讨会”和日本铸造行业见闻的报告。会议共征集论文68篇,其中有色合金方面11篇、特种铸造方面9篇、铸铁方面30篇、铸钢方面16篇。铸铁方面的论文多为基础理论研究,侧重于提  
        
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      发布时间:2023-12-18
    • Liu Zhiming,Jiang Buju,Yu Zhenzong
      Issue 1, Pages: 8-12(1990)
      摘要:In this paper, the preliminary study of numerical simulatiny method and experimental method of solidification process for centrifugal cast iron pipe are described in detail. The solidification pattern and the form mechanism of casting defects are also studied.  
      关键词:离心铸管;凝固过程   
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    • Cheng Jianing,Yang Jinghua,Ge Laichun
      Issue 1, Pages: 13-16(1990)
      摘要:The effect of modification on the thermal expansion and contraction character of hardened gypsum body has been investigated. It was shown that the obvious shrinkage of gypsum on heating within the range 350400C,i,e.at the stage of III CaSO4 II CaSO4 was reduced greatly by the addition of modifier,Thus, the dimensional stability of piaster mould was improved.The mechanism of modification couH b’ consi lered as that th?- allotro-pic transformations of gypsum at different tempera!: ires were changed adding the modifier.by adding the modifier.  
      关键词:石膏;改性研究   
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      发布时间:2023-12-18
    • Zhao Hengyi,Tong Tianfu
      Issue 1, Pages: 17-20(1990)
      摘要:In this paper, the studies are made on the law of dimensional change of ceramic shell mould in investment casting These ceramic shells are as follows : ethyl silicate shell, colloidal silicate shell, sodium silicate shell and its compound ceramic shell, in which the reinfocement. made of sodium silicate coatiag The results have proved that the dimensional change of ceramic shell are decided by binder, refractory are techaique  
      关键词:熔模铸造;线量变化   
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      发布时间:2023-12-18
    • Wang Bingyu,Jiang Haitian,Jiang Yimin
      Issue 1, Pages: 21-25(1990)
      摘要:In this paper, the rule of the variety of gases content of Alloy Z1104 in melting process under the production condition of relative humidity of 40% has been Systematically and quantitatively researched by means of SQH-1 type Hydrogen Detector etc.The paper also has discussed the relationship between the gases content in the alloy, the pinhole-grades and the porosity by pouring the sand castings with different structures.  
      关键词:铝合金;针孔;疏松;含氢量   
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      发布时间:2023-12-18
    • Che Zhehong
      Issue 1, Pages: 26-29(1990)
      摘要:The additinal stabilizing heat treatment was employed in order to remove the interference which there still exist precipitation of secondary phase that cause volume of the piston unstable during the piston working. The thermal expansion coefficient of eutectic Al-Si alloy piston was measured by laser-interfereatial expander from room temperature to 400C Investigation of the influence of rare earth metals on the thermal exponsion coefficient was also carried. The results demonstrate that the accuracy and reliabity are greatly improved.  
      关键词:稀土;活塞;膨胀系数   
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      发布时间:2023-12-18
    • Xiao Koze
      Issue 1, Pages: 30-33(1990)
      摘要:Chill in cast iron occurs when solidification of the grey iron eutectic suppressed, If the suppression occurs after some of the grey iron eutectic has solidified then a mottled structure is obtained. This mottle pattern being now well understood. Traditional specifications for cast rolls calling for certain noble alloys are not correct. Whether or not to include those alloys is viewed a good deal more critically.  
      关键词:轧辊;铸铁件;生产控制   
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    • Issue 1, Pages: 34-37(1990)
      摘要:对于不同类型的锌基合金模胎,分别采用一次浇注和分层浇注法两种不同的工艺,提高了铸件质量,收到了良好的效果。  
      关键词:锌基合金;落锤模胎   
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      发布时间:2023-12-18
    • Issue 1, Pages: 38-40(1990)
      摘要:本文着重叙述美国AZ92A镁合金熔炼;母合金配制热处理制度确定;铸型材料及冷却速度的调整等工艺的实践,从而获得优质铸件,可供从事镁合金生产的工人和工程技术人员学习参考。  
      关键词:镁合金铸造工艺   
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    • Issue 1, Pages: 41-42(1990)
      摘要:本文介绍了氧化镁—氯化铵混合硬化剂的配比及实际应用效果,以及在应用中须注意的问题  
      关键词:氯化镁;氯化铵;硬化剂   
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    • Issue 1, Pages: 43-44(1990)
      摘要:从合金熔炼、浇注工艺及离心铸造成型技术等方面论述了防止ZQA19—4密封圈渗漏的措施。  
      关键词:低压阀门;密封;铝青铜   
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    • Issue 1, Pages: 45-47(1990)
      摘要:壁厚差大的精铸钢件阀体在生产中易产生热裂。本文对其产生热裂的原因进行了分析,并提出了改进措施,主要是改进浇注系统;降低浇注时的型壳温度。  
      关键词:精铸;阀体;热裂   
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    • Issue 1, Pages: 48(1990)
      摘要:<正> 起动机碳刷端盖的圆周均布有四个侧面型孔,材料为压铸铝合金(ZL102)。它的结构设计和精度要求是以压铸为基本成型工艺。 此件的压铸模按常规设计,需采用较复杂的四等分滑块抽芯结构。模具的导滑槽,滑块型芯不仅机加工困难,而且很难保证其精度要求。由于导滑槽易飞落杂物,使滑块型芯出现咬损拉毛,高温条件下容易变形,压铸件侧面型孔周围出现飞边毛刺,模具结构难以保证铸件的精度要求。  
        
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    • Issue 1, Pages: 49-51(1990)
      摘要:<正> 压铸中速度的表示形式有压射速度和充型速度两种。充型速度对获得轮廓清晰、表面光洁的铸件有着重要作用,在生产中一般用调整压射冲头的速度来调节。 国内有关压射速度的确定一直无固定的公式可循,生产中往往仅凭经验或经验数据进行试铸,然后再逐步确定适合自己产品的压射速度。这无疑不利于生产。针对这一现状,特推存一种压射速度的计算方法,以供参考。  
        
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    • Issue 1, Pages: 52-53(1990)
      摘要:<正> 一、膨胀珍珠岩聚渣覆盖保温作用 珍珠岩矿粉是一种酸性玻璃质熔岩,其化学成份(%)为:SiO2 62.47~71.40,AlO3 12.54~15.11,Fe2O3 0.89~2.26,FeO 0。43~1.57,Na O2.54。4.51,K2O 1.88~4.97,H2O 6.58~7.94。物理性能为:比重2.2~2.4,莫氏硬度5.5~6,熔化温度为1280~1360℃,膨化温度为1100~1250℃。  
        
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    • Issue 1, Pages: 54-56(1990)
      摘要:<正> 模具的电铸成型是一种快速制造塑料模具的新工艺,具有周期短、成本低、仿真性强等优点。它是应用电解沉积的原理,在预先选定形状的母模上进行控制性的电解沉积,使阳极的金属镍等在阴极的母模上沉积,当沉积层达到一定厚度后,将母模与沉积层分离,即获得独立的电铸(镍)型腔壳体。但是,这种壳体厚度有限,一般为3~5mm,要使它组成一副完整的模具,就必须采用其它材料将此壳体进行裱背补强(以下统称裱  
        
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    • Issue 1, Pages: 57-51(1990)
      摘要:<正> 本零件外观近似方形,两端面有方框形凸台,中间有一面有凸起的方盒,其内腔高低不平,铸件内壁压入定子铁芯(见图1)。根据铸件特点,我们通过分析比较各种抽芯机构特点,认为斜滑块抽芯机构比较适合,考虑到模具结构紧凑、取件方便,大胆采用了“导向斜角为45°斜滑块抽芯机构”(一般选用5°~25°)和“三级推出机构”。  
        
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    • Issue 1, Pages: 58-40(1990)
      摘要:<正> 过去,我厂一直将Z L301合金的浇冒口、废铸件、飞边和碎料等废料全部重熔注锭,打上炉号,经化学分析后再作配料使用,对于稳定合金的化学成分和铸件的质量无疑是有益的,但由于废料经过重熔以后,杂质铁要增加,限制了回炉锭的用量只能在40~60%左右,造成回炉锭的积压,不仅如此,能源、辅料和工时等费用也大,经济效益低下,这就成了当前一个急待解决的大问题。  
        
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    • Issue 1, Pages: 59-61(1990)
      摘要:<正> 冷铁是防止铸件产生缩孔、缩松、针孔的有效工艺措施,在铝合金砂型铸造中,冷铁获得了广泛的应用。胃口和冷铁配合使用,对改善铸件的内在质量效果更佳。但是,在熔模精密铸造中,由于模壳需要经过高温焙烧且为热型浇注,所以,冷铁的使用受到了一定的限制,使用不广泛。  
        
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    • Issue 1, Pages: 60-61(1990)
      摘要:<正> 电泳制壳具有比通常的熔模铸造用料少、工序简、周期短、操作方便等优点。 其工艺原理是:带有导电液涂层的蜡模在电泳液槽内,在电压作用下,有导电离子的电泳液会即刻聚凝于蜡模表面,产生明显的壳层,即为电泳型壳的雏形(见图1)。  
        
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    • Issue 1, Pages: 62-56(1990)
      摘要:<正> 更换压铸模具,大多数工厂采用吊车起吊,工人凭经验和目测安装模具。这样,一方面,安装模具费时费力;另一方面,为使压射室凸台装进定模安装板的台阶孔中,往往要反复撞击,导致模具的台阶孔撞毛,同时也损伤压射室,不利于模具及压射室的防护,同时,影响了生产率。  
        
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