30Cr2Ni4MOV钢多道次变形条件下的动态再结晶行为

Research on the dynamic recrystallization behavior of 30Cr2Ni4MoV LP rotor steel under multi-pass deformation

汽轮机低压转子是大型核电机组的关键零部件,其主要用钢为30Cr2Ni4 MoV钢。文章通过高温热力学模拟实验,研究30Cr2Ni4 MoV钢在应变速率0.01s-1,温度1200℃～1150℃、1100℃～1050℃、1000℃～950℃双道次变形条件下的高温变形行为,得到30Cr2Ni4 MoV钢在大型锻造件生产中多道次变形条件下的流动应力曲线,以及动态再结晶的发生条件和组织控制规律。

30Cr2Ni4MoV is the commonly used material of low-pressure rotor which is the key component of nuclear power plant. Based on the thermodynamics simulation research of two-pass deformation, which was conducted at strain rate 0. 0ls^-1 and temperature range 1200℃-1150℃, 1100℃-1050℃, and 10000℃-950℃ respectively, the flow stress curves of 30Cr2Ni4MoV under the production condition of heavy forging was obtained. The critical conditions of dynamic recrystallization and the microstructure control were studied.