42CrMo复杂铸钢件熔模精铸过程数值模拟及试验研究.pdfVIP

维普资讯 学兔兔 May 2008 Vo1．57 NO．5 ·473· 髓豳 42CrMo复杂铸钢件熔模精铸过程数值模拟 及试验研究 袁有录 ，曾大新 ，董 艺z，林月军 (1．湖北汽车工业学院材料工程系，湖北十堰442002；2．东风 (十堰)有色铸件有限公司，湖北十堰442062； 3．十堰精纬特种铸造有限公司，湖北十堰442011) 摘要：熔模精密铸造技术具有生产形状复杂铸件的优势，但是生产中如果工艺设置不当，产品中容易产生浇不足、卷 气、缩孔、缩松等铸造缺陷。运用ProCAST铸造模拟软件对所试制的产品进行流场和温度场分析，基于分析的结果预 测铸件中存在缺陷的种类、位置和大小，结论与试验结果相吻合。通过对精铸工艺的优化，成功避免产品缺陷，获得 满意的铸件。 关键词：精密铸造；数值模拟；工艺优化 中图分类号：TG249．5 文献标识码：A 文章编号：1001—4977(2008)05—0473—04 NumericaI Simulation and ExperimentalInvestigation on Investment Casting Process of Complex 42GrMO SteeI Castings YUAN You—lu’，ZENG Da—xin’，DONG Yi ，LIN Yue-jun。 (1．Department of Materials Engineering，Hubei Automotive Industrial Institute，Shiyan 442002， Hubei，China；2．Dongfeng(Shiyan)Nonferrous Casting Co．Ltd．，Shiyan 442062，Hubei，China； 3．KINGWAY Special Casting Co．Ltd．，Shiyan 44201 1，Hubei，China) Abstract：The advantage of investment casting iS to manufacture those castings with complicated shape，but some defects such as misrun，air entrapment，shrinkage cavity and porosity in steeI castings are often caused by inappropriate setting of casting process parameters．The flow and temperature fields of trial—produced castings were analyzed by using of ProCAST software．and based on the results from numericaI simulation．the type and position as welI as size of defects in castings were predicted which showed a good agreement with the experimentaI results．Therefore． the defects could be eliminated successfully by optimizing the process parameters，and the satisfied cast