18.奥氏体钢层错能与马氏体相变.pdf

第 15 卷第 2 期 　 　 　 　 钢 铁 研 究 学 报 Vol. 15 ,No. 2 2003 年 4 月 　 　 　　　　　　　 JOURNAL OF IRON AND STEEL RESEARCH 　Apr. 2003 ε 奥氏体钢层错能与 马氏体相变 程晓农 , 　戴起勋 , 　王安东 (江苏大学材料科学与工程学院 , 江苏 镇江 212013) 摘 　要 :导出了在奥氏体钢中相变驱动力与层错能的关系以及层错能和应变能对马氏体形态的影 ( 响规律 。估算了低碳 、氮含量的低温奥氏体钢中层错扩展时的晶格摩擦阻力 约为相变驱动力的 ) 2 18 % 。临界层错能约为 150 mJ/ m 。 ε 关键词 :奥氏体钢 ;层错能 ; 相变 ;相变驱动力 中图分类号 : TG142. 2 　　文献标识码 :A 　　文章编号 :(2003) ε StackingFault Energy and Martensite Transformation of Austenitic Steels CHEN G Xiaonong , 　DAI Qixun , 　WAN G Andong (Jiangsu University , Zhenjian g 212013 , China) Abstract :The direct relationship between stacking fault energy and phase transformation driving force of austenitic steels and the effect of stacking fault energy and strain energy on the morphology of martensite are deduced. The friction between the crystal lattices during propagation of stacking fault in austenitic steels containing low content of carbon and nitrogen is approximately 18 % of phase transformation driv 2 ing force. And the critical value of stacking fault energy is about 150 mJ/ m for the existence of stacking fault in austenitic steels. ε