介绍了平均应力法、平均径向应力修正法、残余变形法、局部塑性应变法等破裂转速预测方法,并采用这些方法对某粉末冶金高温合金涡轮盘破裂转速进行了分析.通过理论预测与试验结果的对比得知:采用平均径向应力修正法、残余变形法、局部塑性应变法预测的破裂转速与试验结果吻合较好,而采用基于径向应力分布均匀假设的平均应力法推算的破裂转速与试验结果相差较大. The methods of prediction of rupture speed such as mean stress method, average radial stress correction method, residual deformation method and local plastic strain method are introduced, and the rupture speed of turbine disk of a powder metallurgy superalloy is analyzed by these methods.According to theoretical prediction and test The comparison of the results shows that the predicted fracture speed predicted by the average radial stress correction method, the residual deformation method and the local plastic strain method is in good agreement with the experimental results. However, the average predicted fracture speed based on the assumption of uniform radial stress distribution The difference with the test results.