改进型12%Cr材料变形行为研究

Study on Deformation Behavior of Modified 12%Cr Materials

利用Gleeble-3500热模拟试验机对改进型12%Cr转子材料进行热压缩实验,研究其在变形温度为900~1 250℃,应变速率为0.001s^-1、0.01s^-1和0.1s^-1条件下的动态再结晶行为。实验表明:改进型12%Cr材料在热变形过程中随着应变速率减小,变形温度升高,发生动态再结晶的几率逐渐增大。通过实验数据建立该材料的动态再结晶模型,为实际生产工艺的编制提供理论依据。

The modified 12%Cr materials for rotor application is tested for thermal compression with Gleeble-3500 thermal simulation tester to study its dynamic recrystallization at deformation temperature 900~1 250 ℃ and strain rate 0.001 s^-1, 0.01 s^-1 and 0.1 s^-1. The result shows that the possibility of the modified 12%Cr materials to enable dynamic recrystallization increases gradually with the reduction of strain rates and increase of deformation temperature during thermal deformation. A dynamic recrystallization model has been established with the test data as a theoretical reference for preparation of actual manufacturing techniques.