碳含量对低碳锰钢形变强化相变完成时临界应变量的影响  

Effect of Carbon Element on Critical Strain for Completion of DEFT

作　　者：田景[1] 刘锦[1] 杨王[2] 孙祖庆[2] 舒涛[1] 

机构地区：[1]泰山医学院放射学院,山东泰安271016 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《机械工程材料》2007年第1期5-7,11,共4页Materials For Mechanical Engineering

基　　金：国家科委高技术研究计划资助项目(2001AA332020)

摘　　要：利用“形变强化相变”机制研究了两种不同碳含量低碳锰钢(A钢,B钢)过冷奥氏体在780℃和750℃,以10 s-1的速率变形时,碳元素对相变完成时临界应变量cε的影响。结果表明:碳含量对cε的影响很大,主要表现为对组织演变和转变动力学的影响;碳含量增加延长了相变孕育期,cε明显增大;另外,碳含量增加,相变完成时铁素体晶粒尺寸明显减小。Based on the mechanism of deformation enhanced ferrite transformation （DEFT）, the effect of carbon on the critical strain （εc） for the completion of DEFT was investigated when the undercooled austenite in two different low carbon-manganese steels was deformed at 780, 750℃ and strain rate of 10 s^- 1, respectively. The carbon has strong effect on εc effect is exhibited by microstructural evolution and transformation kinetics, The critical strain εc increase and the incubation period is prolonged obviously with increase of carbon. In addition, ferritic grain size decreases with carbon increasing.

关 键 词：碳 形变强化相变 临界应变量 

分 类 号：TG142.1[一般工业技术—材料科学与工程]