基于数值模拟导叶铸造缺陷分析和工艺优化.pdf

学兔兔 Oct．2008 铸 造 VOI．57 NO．10 FOUNDRY ·1033· 基于数值模拟的导叶铸造缺陷分析及工艺优化 盖登宇 ，王世滨 ，李庆芬 ，褚元召 ，邵晶涛 (1．哈尔滨工程大学材化学院，黑龙江哈尔滨 150001；2．哈尔滨工程大学机电学院，黑龙江哈尔滨150001； 3．大庆油田钻井四公司，黑龙江大庆 163412) 摘要：通过数值模拟技术分析了导叶铸件容易出现缩孔、缩松缺陷的位置，与生产实际吻合。针对铸造缺陷建立了导 叶铸件合理的温度场。利用滚圆法设计出了导叶铸件的环形本体补贴，形成了导叶铸件顺序凝固时所需要的温度梯度 场。优化的工艺解决了导叶铸件长轴和瓣体上缩孔、缩松等缺陷的问题。 关键词：数值模拟；温度场；缩孑L；缩松；本体补贴 中图分类号：TB331 文献标识码：A 文章编号：1001—4977(2008)10—1033—04 Defect Analysis and Technology Optimization of Vane Casting Based on Numerical Simulation GAI Deng—yu’，WANG Shi—bin’，LI Qing—fen。，CHU Yuan—zhao’，SHAO Jing-tao。 (1．College of Material Science and Chemical Engineering，Harbin Engineering University Harbin 1 50001，Heilongjiang，China；2．College of Machinery and Electrical Engineering， Harbin Engineering University，Harbin 1 50001，Heilongjiang，China；3．The Fourth Drilling Company of Daqing Oil—Field，Daqing 1 6341 2，Heilongjiang，China) Abstract： The Iocation of shrinkage and dispersed shrinkage in vane casting was analyzed by numericaI simulation technology．and the result was in accordance with practical production．The reasonable temperature field against the casting defects was built．and the annular noumenon allowance of vane casting was designed by means of rounded technology．The temperature field which vane casting needed for sequential solidification was also set up．Finally，the shrinkage gradient and dispersed shrinkage of vane casting in the basic shaft and blade body was eliminated by the optimized technology． Key WOrds：numerical simulation；temperature field；shrinkage cavity；shrinkage porosity；noumenon allowance