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。 Using the mechanism of “deformation enhanced phase transformation”, the effects of supercooled austenite in two different carbon content low carbon manganese steels (A, B) on deformation at 780 ℃ and 750 ℃ ​​at a rate of 10 s-1 were studied. On the completion of the phase transition when the critical strain cε impact. The results show that the carbon content has a great influence on cε, which is mainly due to the influence on the microstructure evolution and transformation kinetics. The increase of carbon content prolongs the phase transition and the cε increases obviously. In addition, the carbon content increases and the phase transformation is completed Ferrite grain size is significantly reduced.