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GH4169合金锻件的组织对工艺参数的变化非常敏感,以往的热模拟组织计算都是基于单一的动态、亚动态再结晶模型,忽略了不同部位组织演化模型的不同以及零件尺寸带来的冷速、温度变化的影响,因此计算组织与实际组织存在区别。建立了综合考虑变形参数、温升、冷速等交互作用的GH4169合金热变形后组织演化预测模型流程图,对φ200 mm双锥试样进行热变形试验并以此为依据,与利用流程图和MSC.Superform有限元模拟计算得到的结果对比验证,并对双锥和某型号涡轮盘的热变形后组织进行预测。
GH4169 alloy forgings is very sensitive to changes in process parameters. Previous thermal simulation calculations are based on a single dynamic and sub-dynamic recrystallization model, ignoring the differences in microstructure evolution models and the cooling speed caused by the size of parts. Temperature changes, the difference between the calculated and actual organizations. A flow chart of predicting the microstructure evolution of GH4169 alloy after thermal deformation was established considering the interaction of deformation parameters, temperature rise and cooling rate. The deformation test of φ200 mm double cone was carried out and based on this, MSC.Superform finite element simulation results obtained by comparing the verification, and double cone and a model of the disk after the hot deformation of the tissue prediction.