最新刊期
      卷 ， 期 6 ， 1998
      • Xiong Yancai Hong Runzhou
        Issue 6, (1998)
        摘要：The mathematic physics model for interface reaction of Hydrogen aluminum melt is carried out in this paper. The kinetics formula of the reaction process has been deduced and calculated. Morever, the process has been tested by means of the technique for direct determination of Hydrogen content in molten aluminum. Both calculated and tested results are similar.  
        关键词：Aluminum Melt;Hydrogen;Interface Reaction   
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        发布时间：2023-12-18
      • Sheng Wenbin Guo Jingjie Su Yanqing Ding Hongsheng Jia Jun
        Issue 6, (1998)
        摘要：Ti 48%Al 2%Cr 2%Nb alloy was melted with Induction Skull Melting（ISM） method, and automotive exhaust valves were formed in permanent mold at static and centrifugal conditions. The influences of pouring power on filling capability of alloy and surface quality of castings were concluded by analyzing the valve forming characteristics. Results showed that linear shrinking increased with the increasing of pouring power and could be restrained by centrifugal casting with ISM method. Surface quality was better with pouring power between 200 and 280 kW.  
          
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        发布时间：2023-12-18
      • Xu Daqing Luo Jirong Huang Naiyu
        Issue 6, (1998)
        摘要：The vacuum evaporative pattern casting is used to manufacture iron matrix particle composites. Microstructures and microhardness of the composites layers were analyzed distribution. The erosive resistance of the composites layers were measured. The results show that the iron matrix particle composites have high hardness, good erosive resistance properties. The properties of the matrix materials have been improved obviousely.  
        关键词：Iron Matrix Particle Composites;Microstructures;Microhardness;Erosive Resistance   
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        发布时间：2023-12-18
      • Wang Qudong Ding Wenjiang Zhai Chunquan Xu Xiaoping
        Issue 6, (1998)
        摘要：Composites with fine Al Fe phase and Al 2O 3 particle on aluminium matrix have been obtained by means of the reaction between Al Mg alloy melt and Fe 3O 4 powder, composites with primary Al Fe phase in outer layer and no primary Al Fe in inner layer have been achieved through the reaction between Al Mg alloy melt and Fe 2O 3 powder during centrifugal casting. The structure characteristic and phase component of the composites are analyzed.  
        关键词：Reaction Synthesis;Metal Matrix Composites;In Situ Composites   
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        发布时间：2023-12-18
      • Fei Hanbin Ye Shengping
        Issue 6, (1998)
        摘要：In accordance with the phenomenon of the EPS particles’ not being filled into the complex mould fully druing manufacture of EPS patterns, a experimental model for evaluating filling performance of the EPS particles is raised in this paper. With this model, the comparative study on filling effect for several kinds of filling methods is proceeded. Aimed to the special situation of filling methods with single filling gun for the handwork or mechanical moulds, the filling method of pule absorbing with the help of positive pressure is adopted to solve the pattern’s defects with the self made testing device.  
        关键词：Lost Foam;Foam Processing;Filling Methods   
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        发布时间：2023-12-18
      • Sun Xun Wang Junqing
        Issue 6, (1998)
        摘要：Based on the principle of similitude, a hydraulic model of vacuum suction pouring for impeller casting was made. Then, the characteristic of the pressure in the mold and the water velocity changes during mold filling were studied, and optimum technological parameters of mold filling were determined through the water analogue experiment. Finally, applying the parameters to the vacuum suction pouring test for real impeller, the serious defect of blowholes in the casting was eliminated.  
        关键词：Vacuum Suction Pouring;Mold Filling;Hydraulic Analogue   
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        发布时间：2023-12-18
      • Zhu Hanliang Guo Jinjie Jia Jun
        Issue 6, (1998)
        摘要：The experiment of hot dip aluminizing had been carried out in order to study the interaction between die casting die and aluminum alloy and the effect of Si on soldering tendency between die and aluminum alloy casting. The experimental results show that Fe 2Al 5 phase layer and FeAl 3 phase are formed when samples of die steel are dipped in pure Al melt, and Fe 2Al 5 phase is the predominant phase of reaction diffusion. Two phase layers of FeSiAl 3 and Fe 2Al 5 are formed when samples are dipped in A380 melt. Because the existence of Si reduces the activity coefficient of Al in the phase layer of FeSiAl 3 and decreases the number of aluminum atoms, supplied from molten Al to Fe 2Al 5 phase, the fast growth of Fe 2Al 5 phase is restrained. Therefore, the element Si in aluminum alloy reduces the interaction between die steel and aluminum alloy melt and reduces the soldering tendency of aluminum die casting. The restraining effect of Si on the Fe 2l 3 phase layer growth decreases with temperature decreasing of hot dip aluminizing.  
        关键词：Si;Die Casting Die;Aluminum Alloy;Interaction;Soldering   
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        发布时间：2023-12-18
      • Su Dehuang
        Issue 6, (1998)
        摘要：The influence of Li on the tensile properties of ZA27 alloy at high temperature has been investigated. The results show that the microstructure of the alloy is significantly refined and crystals at grain boundaries are broken and distributed discontinuously after an appropriate Li addition. As a result, the tensile strength at high temperature significantly increases. The tensile strength of the Li strengthened alloy reaches 230 MPa and 185 MPa and increases by 41.1% and 42.3% more than that of conventional ZA27 alloy respectively.  
        关键词：Li;ZA27 Alloy;Mechanical Properties at High Temperature   
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        发布时间：2023-12-18
      • Xiao Keze
        Issue 6, (1998)
        摘要：Although flow coating is not a new technology, the process is fairly simple so it can be engineered into almost all core/mold processing operations for further developments. This paper addressed the equipment needed for a flow coating network and outlined quality control procedures to maintain consistent, uniform application.  
        关键词：Flow Coating;Flowability;Mould   
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        发布时间：2023-12-18
      • Luo Jixiang
        Issue 6, (1998)
        摘要：This paper introduced the applications and development of squeeze casting in the manufacture of automobile & motorcycle. Typical results of squeeze casting had been given.  
        关键词：Squeeze Casting;Automobile;Motorcycle;Application   
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        发布时间：2023-12-18
      • Mao Weimin Zhao Aimin Zhong Xueyou
        Issue 6, (1998)
        摘要：This paper has described the blank material production and forming process of semi solid metals, and mechnaical properties of components made of semi solid metals and the new progress of the industrial application of semi solid metal forming techniques in some developed countries. The paper has also evaluated the prospect and significance of the industrial application of semi solid metals in the near future in China.  
        关键词：Semi solid Metals;Rheocasting;Thixocasting;Mechanical Properties   
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        发布时间：2023-12-18
      • Xing Shuming Xu Yarong
        Issue 6, (1998)
        摘要：Effect of electrical and magnetic field on metal solidification process is analysed. Based on the principle of magnetics and metal solidification the effect and machanism have been investigated and theoretically deduced. This research is favourable to the further consideration.  
        关键词：Electrical Field;Magnetic Field;Solidification   
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        发布时间：2023-12-18
      • Huang Bojie Hie Bangsheng Jai Yanjie Wu Yaqin
        Issue 6, (1998)
        摘要：Based on the sample aeroplane wheel made in former soviet union, a new casting magnesium alloy containing Nd, Zn, Zr elements with heat resistance and high strength was developed. Through measuring mechanical property, casting and welding characteristics, the result shown that the alloy performances reached or surpassed МЛ10 alloy in the former soviet union specification.  
        关键词：Mg Alloy;Nd Containing Alloy;Heat Resistance;High Srength   
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        发布时间：2023-12-18
      • Hou Linchong
        Issue 6, (1998)
        摘要：In this paper, the foundry technique and process design of rotary permanent mold for the aluminum alloy piston are introduced.  
        关键词：Aluminum Alloy Piston;Permanent Mold;Rotation   
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        发布时间：2023-12-18
      • Wang Jianmin Li Kerui Wu Xianlong
        Issue 6, (1998)
        摘要：The technology for tightness improvement of the Ni austenitic cast iron cable head is studied. It’s very important to design the gating system reasonably, to accurately controll the pouring temperature and the ceramic shell temperature.  
        关键词：Ni Austenitic Cast Iron;Investment Casting;Cable Head   
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        发布时间：2023-12-18
      • Yang Gang Li Laijun Han Cailian Lai Lifen
        Issue 6, (1998)
        摘要：The core shakeout problem for clamp casting was solved using dovetail slot structure. Axial shrinkage cavity in the carry ring were eliminated by calculation effective shrink distance of riser and using several risers （and runners） through casting construction analysis and leading riser design theory to investment casting. The quality of this casting is better than that of US clamp after destructive tensile test so as to obtain excellent economic benefit.  
        关键词：Investment Casting;Axial Shrinkage Cavity;Riser;Pattern Design   
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        发布时间：2023-12-18
      • Huang Yahuang
        Issue 6, (1998)
        摘要：Through analysis of typical technology for some lost wax casting examples, it is expounded that improvement of casting design with more reasonable technology offers an effective and simple way to obtain highly qualitative and compact castings without porosity and shrinkage defect.  
        关键词：Casting Structureal Design;Shrinkage Compensation;Lost Wax Casting   
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        发布时间：2023-12-18
      • Issue 6, (1998)
        摘要：上进气歧管是６１１０柴油机的重要零件之一。其材质为ＺＬ１０５，平均壁厚为５ｍｍ，长度为８００ｍｍ，高为１２５ｍｍ，重４．２ｋｇ，质量要求高，要求一定的耐压性及良好的外观。根据其结构特点及要求，在作批生产工艺准备时对其原试制工艺做了较大的改进：１原试制...  
          
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        发布时间：2023-12-18
      • Issue 6, (1998)
        摘要：试制铸件为６８０轧机连轴节中半柱形衬瓦。使用时衬瓦安装如图１所示，衬瓦镶入传动轴的连接手中，运转时衬瓦拨动传动轴旋转。衬瓦的平面、半圆面及轴孔（见图２）为工作面，工作中承受扭转力、压力、冲击力及摩擦力。因此要求衬瓦具有较高的强度、硬度及耐磨性。衬瓦各...  
          
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        发布时间：2023-12-18
      • Issue 6, (1998)
        摘要：我厂给外商生产的两种齿轮类熔模铸件，由于齿面精度及齿面质量要求较高、齿面不再加工以及外商要货期短等原因，给该类铸件生产带来了一定的困难。为此设计了两种模具结构并进行对比，优选的模具设计方案不仅提高了该铸件的齿面质量，而且还提高了生产效率。１模具材料的...  
          
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        发布时间：2023-12-18
      • Issue 6, (1998)
        摘要：反射炉具有炉膛大，产量高，可熔化大块回炉料，尤其是处理不易破碎的废铸件相当方便等优点，因而，在铜合金熔炼中，被大多数厂家所采用。但是，由于反射炉又具有熔池面积比较大，火焰直接作用于金属的缺点，使合金元素的烧损量加大，直接导致了原材料的浪费。以我厂为例...  
          
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        发布时间：2023-12-18
      • Issue 6, (1998)
        摘要：２控制冲击的一个新方法一旦发现了增强作用效果不佳的原因，则解决的方法也就很明显了。对闭环控制系统进行简单再编程，以使控制阀几乎完全闭合，最终获得理想的减速效果。接下来，需要使控制阀以极快的速度适时地重新打开，实现不受节流作用干扰的增强作用。当然，这要...  
          
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