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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 theory of continuous media, the Shima model was used to describe the densification of hot isostatic pressing of FGH4097 alloy powder. The finite element analysis software MSC.marc was used to simulate and simulate the hot isostatic pressing process of FGH4097 alloy powder cylindrical jacket. The deformation law of the envelope and the influence of temperature field on the densification process of blank were analyzed and verified. The results show that the Shima model has high accuracy in describing the densification process of FGH4097 alloy powder during hot isostatic pressing. The numerical simulation results of cylindrical sleeve and the dimensional error of test results are controlled within 2% The thickness and corner effect have a significant effect on the shrinkage and deformation of the billet during the hot isostatic pressing. The difference of the stress state caused by the temperature gradient in the billet during the hot isostatic pressing leads the billet’s shrinkage to deviate from the isotropy.