一种DC04钢的动态再结晶行为的研究  

Research on Dynamic Recrystallization Behavior of DC04 Steel

作　　者：余聪[1] 曾松盛[2] 贾涓[1] 黄峰[1] 

机构地区：[1]武汉科技大学材料学系,湖北武汉430081 [2]涟源钢铁集团有限公司,湖南娄底417009

出　　处：《热加工工艺》2014年第2期46-49,共4页Hot Working Technology

摘　　要：采用Gleeblel500热模拟试验机研究了DC04钢的单道次压缩变形，通过金相组织及应力-应变曲线分析不同变形参数对动态再结晶行为的影响。结果发现，当形变速率为10s^-1时，DC04钢主要以加工r硬化和动态回复为主；当形变速率为5s^-1时，1000-1100℃变形后，动态再结晶明显，900-950℃变形后以加工硬化和动态回复为主；当形变速率为0．1s^-1时，850-1100℃变形后均发生了动态再结晶，900、1000℃变形后应力-应变曲线出现周期峰值。计算出实验用DC04钢的动态再结晶激活能为125．8kJ／mol，给出了DC04钢的动态再结晶区域图。Abstract：The single-pass compression of DC04 steel was studied by Gleeble 1500. The microstructure after deformation and stress- strain curves were used to study the effect of deformation parameters on the dynamic recrystallization. The result show that when compressing with a strain rate of 10 s^-1, the main performance is work harden and dynamic recovery. When compressing with a strain rate 5 s^-1, the obvious dynamic recrystallization occurs at 1000 ℃ and 1100 ℃, while work harden and dynamic recovery is the main performance between 900 ℃ and 950 ℃. When compressing with a strain rate 0.1s^-1, the dynamic recrystaUization occurs at all the test temperature between 850℃ to 1100℃ , and multi-peak of dynamic recrystallization exists on stress-strain curves between 900 ℃ and 1000 ℃. Then activation energy of recrystallization was calculated to be 125.8kJ/mol and the figures of recrystallization regions distribution were shown at last.

关 键 词：动态再结晶 再结晶激活能 应力-应变曲线 

分 类 号：TG111.7[金属学及工艺—物理冶金]