摘要
利用Baehr DIL805高精度差分膨胀仪，通过对线膨胀行为的测量与分析，获得相关动力学信息，系统研究了不同淬火速率（10～6000℃／min）对T91铁素体耐热钢马氏体转变开始温度Ms的影响。研究表明：不同淬火速率对T91钢的Ms有较大影响，淬火速率为10～50℃／min时Ms点较高，并保持平稳；100～2000℃／min时，Ms相对减小，并随淬火速率的增加呈降低趋势；速率为3000～6000℃／min的快速淬火时，Ms点急剧下降，并随速率的增加呈上升趋势。这种现象与碳原子气团、淬火空位和淬火内应力有关。
The influences of quenching rate in a wide range of 10- 6000℃/min on martensite transformation, starting temperature, Ms, of T91 ferritic heat-resistant steel were studied by DIL805A/D high-resolution differential dilatometer, The phase transformation kinetic information was obtained by adopting a lever rule from the recorded dilatometrie curves. The results show that quenching rate has a significant effect on the Ms temperature. When the quenching rate is 10-50℃/min, Ms is relative high and keeps constant. And in the range of 100-2000℃/min, Ms is relatively decreases with quenching rate increasing. The rapid quenching rate, 3000-6000℃/min, leads to sudden drop of Ms, and Ms increases with quenching heating rate. The above phenomena were explained by the carbon atomic group, quenching vacancy and internal stress.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第1期61-63,71,共4页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(50401003)
全国优秀博士论文作者专项基金资助项目(200335)
天津市自然科学基金资助项目(033608811)
河南省国际合作项目(0546620015)
关键词
T91铁素体耐热钢
淬火速率
碳原子气团
淬火空位
T91 ferritic heat-resistant steel
quenching rate
carbon atomic group
quenching vacancy
