高温合金扩压器整体精铸过程的数值模拟及工艺优化  

Numerical simulation and process optimization of superalloy integral precision investment casting diffuser

作　　者：孙长波[1] 尚伟[1] 周君华[1] 李波[1] 李宝峰[1] 

机构地区：[1]中航工业沈阳黎明航空发动机(集团)有限责任公司,沈阳110043

出　　处：《材料科学与工艺》2014年第1期100-104,共5页Materials Science and Technology

摘　　要：为了完成某航空发动机扩压器部件的整体精密铸造,提高铸造的合格率,降低铸造成本,采用ProCAST数值模拟技术对铸造过程进行了模拟.模拟结果表明:当型壳采用保温毡包裹,保温温度为1 050℃时,铸件下端加强筋附近出现了分散状的缩松;对出现疏松的部位采用铁砂制备型壳,熔注时型壳下部采用河砂保温,型壳上部仍然采用保温毡进行保温,保温温度改为1 100℃,模拟出铸件加强筋部位的疏松缺陷减少,甚至消失.实物熔注结果表明,采用ProCAST软件对扩压器铸件精铸工艺参数的模拟结果与实物浇注缺陷吻合.To complete the aero-engine diffuser integral investment casting, to improve the qualified rate of casting and to reduce the casting cost, the casting process is simulated using ProCAST. The results show that there are dispersed porosity near the lower reinforcing fibs of casting when the shell adopts insulation blanket wrapped, and the shell temperature is 1 050 ℃. When shell preparation with iron on porosity parts, and mold shell was preserved by fiver sand nsulation at the.lower part, and at the upper part with blanket insulation still, and the preserve temperature is 1 100 ℃, the porosity was reduced or even disappeared. The real casting results indicate that the simulation result is correct.

关 键 词：PROCAST 数值模拟 熔模铸造 缩松 保温方式 工艺优化 

分 类 号：TG249.5[机械工程—精密仪器及机械]