X12CrMoWVNbN10-1-1铁素体耐热钢中的马氏体相变过程  

Martensitic Transformation in X12CrMoWVNbN10-1-1 Ferrite Heat-Resistant Steel

作　　者：韩利战[1] 顾剑锋[1] 潘健生[1] 

机构地区：[1]上海交通大学上海激光制造与材料改性重点实验室,上海200240

出　　处：《上海交通大学学报》2010年第1期11-15,共5页Journal of Shanghai Jiaotong University

基　　金：上海市科委重大科技攻关项目资助(08DZ1100302)

摘　　要：通过膨胀试验研究了X12CrMoWVNbN10—1—1铁素体耐热钢在不同奥氏体化条件下的马氏体相变过程．结果表明：在温度1010～1200℃奥氏体化15min条件下，马氏体相变的开始温度点Ms与结束温度点Mf随着奥氏体化温度的增加而升高；在1070℃奥氏体化时，Mf随奥氏体化时间的延长而升高，而在奥氏体化时间小于3h时，随着奥氏体化时间的增加，M5上升，在奥氏体化时间超过3h后，Ms稳定在460℃左右；根据膨胀曲线拟合得到在1070℃奥氏体化保温不同时间条件下的马氏体相变动力学方程．Dilatometric studies on X12CrMoWVNbN10-1-1 ferrite heat-resistant steel were carried out to investigate the martensitic transformation under different austenization conditions. When the austenitizing temperature increases from 1 010 ℃to 1 200℃ and the holding time keeps at 15 min, M, and Mf increase with the increasing of austenitizing temperature. When the austenitizing temperature keeps at 1 070℃ and the holding time changes from 5 min to 20 h, Mf increases with the increasing of the holding time, and Ms increases with the increasing holding time only for the first 3 h, and then reaches a constant value of 460℃ when the holding time exceeds 3 h. A new kinetic equation for martensitic transformation for this steel austenitized at 1 070℃ was obtained based on the dilatometric curves tested, which sets up the relationship between the volume fraction of martensite, transformation temperature and the austenization holding time.

关 键 词：X12CrMoWVNbN10—1—1铁素体耐热钢 奥氏体化 马氏体相变 

分 类 号：TG142.73[一般工业技术—材料科学与工程]