基于ProCAST软件的镍基中空叶片定向凝固过程模拟  

Directional Solidification Simulation of Nickel-base Hollow Blade Based on ProCAST Software

作　　者：章璐[1] 黄兴民[1] 杨树龙[1] 戴光泽[1] 

机构地区：[1]西南交通大学材料科学与工程学院材料先进技术教育部重点实验室,四川成都610031

出　　处：《铸造技术》2014年第1期81-85,共5页Foundry Technology

基　　金：十一五国家科技支撑计划(高速列车关键材料及部件可靠性:No.2009BAG12A07);2010年度聘请外籍教师教育部重点项目<高速列车关键材料相关研究(教外专函[2010]33号)>;中央高校基本科研业务费专项资金(No.SWJTU12CX011)

摘　　要：采用ProCAST铸造仿真软件对镍基中空叶片定向凝固过程进行仿真模拟。结果表明:当界面换热系数恒定为1 500 W/m2·K时,随着抽拉速率逐渐降低,糊状区最小宽度从66.4 mm(v=8 mm/min)降低为39.1 mm(v=2mm/min);当抽拉速率恒定为2 mm/min时,随着界面换热系数降低,糊状区最小宽度从74.5 mm(H=1 500 W/m2·K)降低为39.1 mm(500 W/m2·K);抽拉速率和界面换热系数分别为2 mm/min和1 500 W/m2·K时,中空叶片最大位移量约为0.05 mm,可获得一定的尺寸精度。Utilizing the ProCAST software, the directional solidification of nickel-base hollow blade was simulated. It was concluded that, with constant interfacial heat transfer coefficient of 1500 W/m^2 ·K, the smallest width of mushy zone changes with the decrease of withdrawal rate from 66.4 mm （8 mm/min） to 39.1 mm （2 mm/min）; when the withdrawal rate is constant as 2 mrn/min, the smallest width of mushy zone decreases from 66.4 mm to 39.1 mm with the change of interfacial heat transfer coefficient from 1500 to 500 W/m^2 ·K; Besides, with interracial heat transfer coefficient of 1500 W/m^2. K and withdrawal rate of 2mm/min, the total displacement of hollow blade is 0.05 mm, guaranteeing the accuracy of the size of hollow blade.

关 键 词：中空叶片 定向凝固 数值模拟 界面换热系数 抽拉速率 

分 类 号：TG244[金属学及工艺—铸造]