FGH96合金包覆挤压过程数值模拟

Numerical Simulation for Canning Extrusion Process of FGH96

采用有限元数值模拟与正交设计相结合的方法对热等静压态FGH96合金包覆挤压过程进行了数值模拟,系统分析了模具模角、工作带长度、入口圆角半径等模具关键结构参数对包覆层完整性、芯料挤压比和成形载荷的影响规律。确定了模具结构参数的最佳组合。结果表明:随着模角的减小、工作带长度的缩短和入口圆角半径的增大,有利于提高包覆层安全性,增大芯料挤压比。

The configuration and dimension of the die are critical for canning extrusion of FGH96 P/M superalloy. In this paper, the influence of die angle, band length and entrance fillet of the dies on the canning integrality,extrusion ratio of the core,and extrusion force were analyzed comprehensively by using FEM and orthogonal method. The results of FEM numerical simulation and orthogonal analysis indicate that the integrality of canning and extrusion ratio of the core were improved with the decrease in die angle, band length and increase in entrance fillet of the die. The optimal combination of the structural parameters of the extrusion die was obtained.