40CrNiMo钢的热变形组织变化  

Hot Deformation Microstructures of 40CrNiMo Steel

作　　者：张红英[1] 张鸿冰[1] 胡静霞[1] 

机构地区：[1]上海应用技术学院材料工程系,上海200235

出　　处：《上海应用技术学院学报（自然科学版）》2006年第1期19-21,共3页Journal of Shanghai Institute of Technology: Natural Science

摘　　要：利用Gleeble 1500热／力学模拟实验机，对40CrNiMo钢进行双道次热模拟单向压缩试验。变形温度分别为710℃、760℃、950℃，变形速率为0．5～30s^-1，变形量为0．05～0．4，道次间停留时间为1～100s。分析了钢热变形组织特征，结果表明钢在950℃温度变形过程中发生奥氏体动态再结晶，在760℃温度变形过程中，应变奥氏体诱发铁素体析出，而在710℃温度变形过程中，应变奥氏体加速了铁素体析出。In this paper, the Gleeble-1500 heat/mechanics moulding experimental was used to make doublepass hot compressive test for the 40CrNiMo steel, the grain character of 40CrNiMo steel＇s hot deformed austenite at the temperature rang of 710 ℃～950 ℃ ,in a strain rate rang of 0.5～30 s^-1 and a strain rang of 0.05～0.4 was analyzed. Results indicate that austenite dynamic recrystallization took place above the temperature of 950 ℃, strain induced ferrite transformation was investigated in the temperature of 760 ℃ and strain enhanced ferrite transformation was investigated in the temperature of 710 ℃.

关 键 词：40CRNIMO钢 应变强化相变 应变诱发相变 动态再结晶 

分 类 号：TG113.1[金属学及工艺—物理冶金]