摘要:<正> 从工业发达国家看,90年代铸造生产的主要特征和标志将是计算机技术在铸造过程中的普遍应用和迅速发展。以美国为例,在70年代末和80年代初,计算机技术在铸造工厂的应用还寥若晨星。到80年代末,一批实用化的软件已较广泛地应用于铸造工厂,软件市场在铸造领域也开始活跃起来。据George N. Booth预计,90年代,计算机辅助设计(CAD)将获得更广泛的应用,有限元分析在铸件设计及优化工作中成为一个常规的方法。模拟技术,凝
摘要:Acomparison has been finished on compactness of three type Al-Si alloys-ZL101 ZL102 ZL107. The results show that ZL102 has best compactness among three alloys in unmodification,and the compactness of alloys can be improved greatly by P treatment.
摘要:A new hybrid hardener MgCl2 6H2O-NH4C1 has been studied. The Hybrid ratio, hardening effect, ceramic shell properties, processing control were discussed in this paper.
摘要:The new type of continuous directional solidification apparatus is applied to Investigate the morphology of eutectic silicon and the strength of eutectic Al-Si alloys modified by strontium at different rates of cooling. The study indicates when cooling rate is above a given value, further increasing cooling rates will neither change the diameter of the eutectic silicon nor increase the strength of the alloys. The concept of "crictical cooling rates of saturated modification "is put forward.
摘要:In the paper, the influence of RE-AT combined process for removing H on structure and tensile property of ZL108 have been investigated. It has been shown that the combined process improves structure and tensile property, particularly high temperature property. This paper has posed combined process which be suited to Al-Si alloys for piston castings and different type castings.
摘要:The gates of permanent mold casting for Al alloy are studied in this paper, and the method for selecting them is presented. It has shown that the S-shaped gate is the best type for Al alloy castings. The result has been proved right in producing X195 Al alloy pistons