上海交通大学学报

上海交通大学学报（自然版）

• 金属学与金属工艺 • 上一篇    下一篇

X12CrMoWVNbN10-1-1铁素体耐热钢中的马氏体相变过程

韩利战，顾剑锋，潘健生   

  1. 上海交通大学 上海激光制造与材料改性重点实验室
  • 收稿日期:2009-06-28 修回日期:1900-01-01 出版日期:2010-01-29 发布日期:2010-01-29

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

HAN Lizhan,GU Jianfeng,PAN Jiansheng   

  1. Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai Jiaotong University
  • Received:2009-06-28 Revised:1900-01-01 Online:2010-01-29 Published:2010-01-29

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1 010~1 200 ℃奥氏体化15 min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1 070 ℃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3 h时，随着奥氏体化时间的增加，Ms上升，在奥氏体化时间超过3 h后，Ms稳定在460 ℃左右；根据膨胀曲线拟合得到在1 070 ℃奥氏体化保温不同时间条件下的马氏体相变动力学方程

关键词: X12CrMoWVNbN10-1-1铁素体耐热钢, 奥氏体化, 马氏体相变

Abstract: 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, Ms 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.