淬火速率对T91铁素体耐热钢马氏体转变开始温度的影响  

Effect of Quenching Rate on Martensite Transformation Starting Temperature of T91 Ferritic Heat-Resistant Steel

作　　者：宁保群[1] 刘永长[1] 高志眀 乔志霞[1] 杨留栓[2] 余小军[3] 

机构地区：[1]天津大学材料科学与工程学院 [2]平顶山工学院材料科学与工程系,河南平顶山467001 [3]天津生物工程职业技术学院,天津300462

出　　处：《材料科学与工程学报》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)

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.

关 键 词：T91铁素体耐热钢 淬火速率 碳原子气团 淬火空位 

分 类 号：TG142[一般工业技术—材料科学与工程]