铸态30Cr2Ni4MoV钢动态再结晶行为研究  

Research on Dynamic Recrystallization Behavior of As-cast 30Cr2Ni4MoV Steel

作　　者：宿展宁 党淑娥[1] 何艳[1] 赵禛 

机构地区：[1]太原科技大学材料科学与工程学院,山西030024

出　　处：《大型铸锻件》2015年第1期12-14,共3页Heavy Casting and Forging

基　　金：国家自然科学基金资助项目(51275330);山西省自然科学基金资助项目(2012011022-4)

摘　　要：利用Gleeble-1500D热模拟机模拟高温镦粗,研究铸态30Cr2Ni4Mo V钢在1 000~1 250℃、应变速率为0.001 s^-1~0.1 s^-1变形条件下的热变形行为。通过对实验数据分析,得到了该钢的流动应力曲线,高温塑性本构方程,热变形激活能,建立了铸态30Cr2Ni4Mo V钢动态再结晶动力学模型和动态再结晶晶粒尺寸模型,为优化低压转子钢大锻件在高温条件下锻造加工工艺提供理论依据。The Gleeble-1500 D thermal simulation machine is used to simulate high temperature upsetting,and study on heat deformation behavior of as-cast 30Cr2Ni4 Mo V steel under the deformation conditions of 1 000 ~ 1 250 ℃and strain rate of 0. 001 s^-1~ 0. 1 s^-1. By the analysis of experimental data,flow stress curve,high temperature plastic constitutive equation and the hot deformation activation energy of the steel are concluded,and the dynamic recrystallization kinetics model and dynamic recrystallization grain size model of as cast 30Cr2Ni4 Mo V steel are established to provide theoretical foundation for optimizing the forging process of low-pressure rotor steel large forging under high temperature conditions.

关 键 词：铸态30Cr2Ni4MoV钢 低压转子 热模拟 流动应力 动态再结晶模型 

分 类 号：TG361[金属学及工艺—金属压力加工]