GH141合金的热态变形特性  

Hot Deformation Characteristics of GH141 Superalloy

作　　者：王凯[1] 刘东[1] 耿剑[1] 贺子研[1] 

机构地区：[1]西北工业大学材料学院,陕西西安710072

出　　处：《热加工工艺》2009年第8期49-53,95,共6页Hot Working Technology

摘　　要：采用Gleeble-3500热模拟实验机研究了GH141合金在1020～1170℃、应变速率在0.01～10 s-1的热态变形特性,分析了流动应力与热力参数的关系,并建立了GH141合金在热态变形过程中的本构方程。采用Quantiment-500型自动图像分析仪定量测定了动态再结晶晶粒尺寸和再结晶体积分数与Z参数的关系,建立了该合金的动态再结晶数学模型。结果表明,该数学模型的计算结果与实验数据很好地吻合,从而为GH141合金的锻造工艺制定与质量控制提供了理论依据。The deformation behavior and evolution process of dynamic recrystallization （DRX） for GH141 superalloy were studied by isothermal compression test in the temperature range of 1120 - 1170℃ and the strain rate range of 0.1 40.01 s^-1. The effect of thermomechanical parameters on flow stress was analyzed. A constitutive relationship based on the Arrhenius equation for GH 141 superalloy was proposed. The initiation and evolution of DRX were investigated with quantitive microstructure analysis. The volume fraction and grain size of DRX as a function of Zener-Hollomon parameter were established. It was found that the calculation results of the proposed model agreed well with the experimental data. Therefore, the proposed model can lay foundation for quality control and process design of GH 141 superalloy forging.

关 键 词：GH141合金 本构方程 动态再结晶模型 

分 类 号：TG146.4[一般工业技术—材料科学与工程]