最新刊期
      卷 ， 期 3 ， 1999
      • Jia JunSheng WenbinGuo JingjieSu Yanqing Ding Hongsheng
        Issue 3, (1999)
        摘要：The flow speed distribution of Ti15V3Cr3Sn3Al （Ti153） alloy melt poured in permanent mould druing centrifugal casting process has been analyzed. The relation between the filling speed,time and the filling length, as well as the maximum critical angular velocity 0max and the mould diameter D,the length L are concluded. Calculation results show that the filling speed and the filling time are the function of the filling length during centrifugal casting process,and increase with the increase of the filling length. The maximum critical angular velocity decrease with the increase of the cavity length and diameter. Experimental results show that gas holes have been formed when angular velocity is equal to 280 r/min. Furthermore,calculation results are verified.  
        关键词：Permanent Mold;Ti15V3Cr3Sn3Al Alloy;Flow Speed Distribution;CentrifugAuthor al Pouring   
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        发布时间：2023-12-18
      • Yang JiakuanHuang NaiyuLi Yan
        Issue 3, (1999)
        摘要：The catalytic combustion is an effective method to purify the waste gases discharged from the lost foam shop. In this paper, the effects of such factors as the concentration of waste gases, the temperature, the space velocity etc. on the purification efficiency of styrene combustion reaction on the honeycomb catalyst were investigated.The results have shown that the concentration of styrene has little effect on styrene purification efficiency, the temperature plays a substantial role on catalytic combustion of styrene, and the purification efficiency of styrene decreases with the increase of the space velocity.  
        关键词：Lost Foam Casting Process;Purification of Waste Gases;Catalgtic Combustion   
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        发布时间：2023-12-18
      • Zhou ZhengWang JianDing Peidao
        Issue 3, (1999)
        摘要：Intermetallic compound foam reinforced aluminium alloy surface composite layer are obtained by solution treatment after low pressure Casting.Microstructure and properties are studied by means of metallograph,SEM,XRD and microhardness.The results showed that interface of intermetallic compound foam can move into aluminium alloy matrix.  
        关键词：Intermetallic Compound;Composite Layer;Interface   
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        发布时间：2023-12-18
      • Zhou LihongWan WeibinCai Yuanren
        Issue 3, (1999)
        摘要：Based on the three main factors of aluminium silicate affecting mold shell strength, several different kinds of alumina refractory powders are selected to make mold shell specimens. The results show that mold shell with yangquan powders obtain higher strengths at 900 . The test also indicates that glass phase in mold shell is more favorable to increase bonded property among alumina particles in comparison with silica gel.  
        关键词：Sodium Silicate;Mold Shell;Al2O3;Glass Phase;Strength at High Temperature   
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        发布时间：2023-12-18
      • Li YuancaiTong XinlinLi LianjieWang Wenqing
        Issue 3, (1999)
        摘要：A vaccum pouring technology in phenol resin shell mold/core for Alalloy casting is developed. The effect of such factors as grain size, pouring temperature, vaccum degree, casting walled thickness and coating layer thickness etc. is examined. It is considered that the use of superfine powder coating is an effective measure to improve Alalloy casting surface roughness.  
        关键词：Shell（Core） Mold Technology;Vaccum Pouring;AlAlloy Castings;Surface Roughness;SuperFine Powder Coasting   
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        发布时间：2023-12-18
      • Wang ZhongkeHuang NaiyuLuo JirongYe Shengping
        Issue 3, (1999)
        摘要：The effect of surface carburizing on the mechanical properties has been studied for steel castings in EPC. The tensile strengh（b）yield strenth （s）, elongation（）, area reduction（） and toughness at -20 C（k） have been determined for ship container casting in EPS and PMMA patterns and these values were compared with those in investment casting. It is shown that the surface carburizing make the b,s,k values of casting increase and the , values reduce.  
        关键词：Evaporative Pattern Castings;Steel Castings;Surface Carburizing;Mechanical Properties   
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        发布时间：2023-12-18
      • Zhu Lijuan
        Issue 3, (1999)
        摘要：The existing counter pressure casting machine has been modified to a new counter pressure casting machine with inclinable vaccum filling used for complicate light nonferrous castings. In fact, the new method intergrates all advantages of vaccum low pressure casting, conventional counter pressure casting and gravity casting. It is able to make the casting more compact, to reduce casting leakage under pressure test and to basically eliminate gas porosity and shrinkage cavity. As a result, material strength and toughness significantly improve.  
        关键词：Vacuum Filling;Inclinable Filling;Pressuring;Inverting;Casting Method   
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        发布时间：2023-12-18
      • Lin GaoyongZhang ShenghuaGu Liangwei
        Issue 3, (1999)
        摘要：The effects of four elements Ni, Si, Cr and Fe upon the properties of the Qsi（silicon bronze） dampblock was investigated through orthogonal tests. The optimum compositions of the dampblock alloy was obtained.  
        关键词：Dampblock;Silicon Bronze;Continuous Casting Machine;Orthogonal Tests   
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        发布时间：2023-12-18
      • Zhang YupingLi LianyingWang LinghuiSun Gang
        Issue 3, (1999)
        摘要：Under different load and rotative velocity, the friction coefficient, the wear and the loadbearing capacity for chromium brass and ZCuAl10Fe3 are demonstrated. The results show that the new brass is an excellent slide wearresistant alloy applied to heavy load and low speed condition.  
        关键词：Brass;Wear Resistance;AntiFriction   
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        发布时间：2023-12-18
      • Yu HaipengZhang ZhongyuanLi RongdeYing Jingtian
        Issue 3, (1999)
        摘要：The effect of experimental variables on the mechanical properties for ZA27 casting alloy during punching squeeze casting processing has been investigated on the basis of orthogonal experiment. The result shows the order of influential factors as:specific pressure, die temperature,pouring temperature and pressure holding time. At a proper valve of these factors,the mechanical property of the ZA27 alloy could reach b=440 MPa,s=12%,HBS130.  
          
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        发布时间：2023-12-18
      • Zhou WendaYu Yibin
        Issue 3, (1999)
        摘要：The investment casting has its specific characteristic. Factors influencing the acid pickling quality of investment casting not only relate to corrosion resistance of alloy, but depend on the ability of acid pickling solution to casting scale removal. For 174PH steel investment casting HCl acid pickling solution type has technologyical preference to H2SO4 or HNO3 types.  
        关键词：Investment Castings;174PH Steel;HCl Acid Pickling Solution Type   
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        发布时间：2023-12-18
      • Chen GuangLi XiaoyaZhang ZhongchengZhong Li
        Issue 3, (1999)
        摘要：Low elongation is a general existing problem in hot mold by centrifugal casting for ductile iron pipe. The change of residnal Mg in molten iron was analyzed based on the feature of centrifugal casting. It is found that this disadvantage is attributed to the superoxidation of iron melt and the loss of Mg due to the centrifugal effect and the comparatively long holding time of the molten iron in the hot mold. One way to increase the elongation is to properly prevent Mg from oxidation, and the other is to shorten the solidification time.  
        关键词：Centrifugal Casting;Ductile Iron;Elongation   
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        发布时间：2023-12-18
      • Wang Mingfa
        Issue 3, (1999)
        摘要：The distributing rule of the raw material constituents and its cost of the colloidal silica sol shells are determined. The rule in relation with the casting is explored. It is instructive to control material consumption and to analyze casting cost for productive management of investment casting.  
        关键词：Colloidal Silica Sol Shell;Distribution of Raw Material Constituents;Analysis of the Rule   
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        发布时间：2023-12-18
      • Issue 3, (1999)
        摘要：In comparison with the ctype die castig machine, some features of structure and control type and computer management of injection system for CLT type die casting machine are introduced.  
        关键词：Die Casting Machine;Injection System;Structure;Control;Management   
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        发布时间：2023-12-18
      • Zhang GuangyuanZhang YuhuaZhang Lin
        Issue 3, (1999)
        摘要：The alcohol is used as medium to generate hydrolyzate of ethyl silicate in traditional ceramicmold casting process. The alcohol in the mold must be fired up immediately to avoid fissure. To solve this problem, supersonic wave was to be used to extend the interaction surface area between ethyl silicate and water for ethyl silicate hydrolyzing. And a large amount of alcohol is saved. Moreover, good quality is obtained.  
        关键词：Ceramicmold Casting Process;Supersonic Wave;Process of Ethyl Silicate Hydrolyzing   
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        发布时间：2023-12-18
      • Wang ZhongjueXu Zhongsheng
        Issue 3, (1999)
        摘要：The CuCr alloy with 0.4%￣1.0% chromium content possessed good electric conductivity and heat resistance. As a new material, the alloy has found its extensive use for the electric contact plate, contact ring, clamping part etc in electronic industry and electrical equipment in recent years. On basis of conventional melting and molding processes for CuCr alloy casting, the Rece45 mischmetal modified CuCr alloy in connection with ceramic foam filter has been developed. The field test shows that hot crack is fully eliminated and electric conductivity, corrosion resistance are enhanced.  
        关键词：Modification;Filtration;CuCr Alloy Castings   
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        发布时间：2023-12-18
      • Li BaomianWang Yugui
        Issue 3, (1999)
        摘要：The effect of Zn addition on the color characteristics of the CuZn alloy castings was studied. The experimental results show that with an increase in Zn content, the red color fraction of an alloy decreases first and then increases, while as the yellow color fraction and lightness value increase first and then decrease, the alloy surface color changes from copper red to golden yellow, yellow, green yellow, yellow, and golden yellow. By adjusting Zn content, the alloys with 18K or 14K gold colors surface can be obtained, but those with 24K gold color surface can not be obtained.  
        关键词：CuZn Alloys;Color;Chromaticity Parameters;Color Difference   
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        发布时间：2023-12-18
      • Liao HengchenFang XinxianSun Guoxiong
        Issue 3, (1999)
        摘要：Grain refining in hypoeutectic AlSi casting alloys has become an essential practice of melt treatment. The grain refinement with three types of master alloys: binary AlTi, binary AlB, and ternary AlTiB with Ti or B in excess of the TiB2 stoichiometry, in hypoeutectic AlSi casting alloys was different from that in commercial purity aluminum and its wrought aluminum alloys. Al3Ti3B and Al3B master alloys exhibited very excellent grain refining ability in hypoeutectic AlSi casting alloys and the interaction between Si and grain refiners was thought to play an important role during grain refinement. The quality of melt treatment in AlSi alloy could be controlled by evaluating and predicting the grain refinement and modification with differential thermal analysis equipment. There are four grain refinement mechanisms in hypoeutectic AlSi casting alloys: peritectic reaction theory, eutectic reaction theory, boride particles theory, and hypernucleation theory. The recent development of grain refining, intera  
          
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        发布时间：2023-12-18
      • Zhang YongzhongZhang KuiFan JianzhongLiu Guojun
        Issue 3, (1999)
        摘要：The property advantages and applications of magnesium alloys in automotive industry are reviewed in this paper.Some research advance concerning magnesium alloy materials,smelting and die casting techniques are introduced.Also some development tendency in the future is pointed out.  
        关键词：Magnesium Alloy;Smelting;Die Casting;Automobile   
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        发布时间：2023-12-18
      • Issue 3, (1999)
        摘要：芯撑在铸造生产中需经机械加工，材料要求与铸件材料基本相同。这对小批量生产及试制生产，都很不方便。我们在铝合金铸造时，采用了消失芯撑，该芯撑简单易行，材料成本低。消失芯撑用聚苯乙烯泡沫塑料（该材料处处可见，包装后即被遗弃），按铸件要求裁出芯撑高度，在保...  
          
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        发布时间：2023-12-18
      • Issue 3, (1999)
        摘要：细化共晶团是提高球铁综合力学性能的有效途径。加快铁水凝固的冷却速度就可以实现共晶团的细化。金属型铸造可以加快冷却速度，但是由于冷速过快，容易使球铁铸件出现白口；同时也由于金属型直接与铁水接触，影响金属型的使用寿命，造成铸件生产成本增加。金属型覆砂工艺...  
          
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        发布时间：2023-12-18
      • Issue 3, (1999)
        摘要：机油散热器盖是柴油发动机的主要零件之一，要求有较好的致密性，经气密性试验不能有渗漏现象。铸件不允许有冷隔、缩孔、疏松和夹渣等缺陷。１机油散热器铸件压铸缺陷表现形式图１所示是机油散热器盖铸件图局部，图中有一图１机油散热器盖铸件图１７ｍｍ深９３ｍｍ的铸...  
          
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        发布时间：2023-12-18
      • Issue 3, (1999)
        摘要：图１为一种简易的流槽及过滤箱装置。内衬选用马尔耐特材料的板型预制而成，依托钢结构的框架与炉体联接。通过保温炉放流口的钎子可以控制过滤箱中的铝液水平高过放流口的高度，铝液在表皮下平稳流动，炉内铝液不会在放流口形成喷溅式的流动。通过过滤箱中的流口１控制流...  
          
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        发布时间：2023-12-18
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