FGH4097合金热等静压成形数值模拟  

Numerical simulation of hot isostatic pressing process of FGH4097 superalloy

作　　者：瞿宗宏 刘建涛[1,2] 张国星[1,2] 张义文[1,2] 陶宇[1,2] QU Zong-hong LIU Jian-tao ZHANG Guo-xing ZHANG Yi-wen TAO Yu(High Temperature Material Institute, Central Iron and Steel Research Institute, Beijing 100081, China Key Laboratory of Advanced High Temperature Materials, Beijing 100081, China)

机构地区：[1]钢铁研究总院高温材料研究所,北京100081 [2]高温合金新材料北京市重点试验室,北京100081

出　　处：《材料热处理学报》2017年第7期173-179,共7页Transactions of Materials and Heat Treatment

摘　　要：基于连续介质理论,应用Shima模型描述FGH4097合金粉末热等静压的致密化变形规律,采用有限元分析软件MSC.marc对装FGH4097合金粉末圆柱包套的热等静压过程进行了数值模拟和试验验证,分析了包套的变形规律以及温度场对坯料致密化过程的影响。结果表明:在热等静压过程中,Shima模型对描述FGH4097合金粉末的致密化过程具有较高的精度,圆柱包套的数值模拟结果和试验结果的尺寸误差控制在2%以内;包套的厚度以及边角效应对热等静压过程中坯料的收缩变形有着显著的影响;热等静压过程中坯料内温度梯度所导致的应力状态差异使得坯料的收缩偏离各向同性。Based on the continuous medium theory, the Shima model was used to describe the densification and deformation of FGH4097 powder during hot isostatic pressing（HIP）. The finite element analysis software MSC. marc was used to simulate the hot isostatic pressing process of a cylindrical capsule containing FGH4097 powder. The computed results were verified by real experiments. The deformation characteristics of the capsule and the effect of temperature field on the densification process of the compact were analyzed. The results show that the Shima model describes the densification process of FGH4097 alloy powder with high precision; the HIPed cylindrical capsule size error between numerical simulation and experiment is less than 2% ; capsule thickness and corner effect have a significant impact on capsule deformation; stress difference caused by temperature gradient makes the shrinkage deviate from isotropy.

关 键 词：FGH4097合金 热等静压 数值模拟 Shima模型 致密化 

分 类 号：TG132.33[一般工业技术—材料科学与工程]