预冷淬火温度对T91铁素体耐热钢马氏体转变温度的影响  

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

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

机构地区：[1]天津大学材料科学与工程学院形状记忆材料教育部工程研究中心,天津300072 [2]平顶山工学院,河南平顶山467001

出　　处：《金属热处理》2007年第9期33-35,共3页Heat Treatment of Metals

基　　金：国家自然科学基金(50401003);全国优秀博士论文作者专项基金(200335);天津市自然科学基金(033608811);河南省国际合作项目(0546620015)

摘　　要：用DIL802高精度差分膨胀仪测量T91铁素体耐热钢马氏体转变过程中动力学信息,研究了预冷淬火温度（450～1100 ℃）对T91钢马氏体开始转变温度Ms的影响.结果表明,预冷淬火温度对T91钢的Ms有较大影响：随预冷淬火温度的提高Ms点首先呈上升趋势,并在950 ℃达到峰值,随后又下降.这种现象主要与＂碳原子气团＂和淬火空位的形成有关.The effects of precool-quenching temperature （450 - 1100℃ ） on martensite transformation starting temperature Ms of 391 ferritic heat-resistant steels were studied by DIL805A/D high-resolution differential dilatometer. The martensite transformation kinetic information was obtained from the recorded dilatometric curves. The results show that the precool-quenching temperature has a significant effect on the Ms temperature. At first Ms increases with increasing the precool-quenching temperature and reach the maximum value at 950℃, and then drop with further increasing precoolquenching temperature. The phenomenon is explained by the formation of carbon atomic gas group and quenching vacancy.

关 键 词：预冷淬火温度 T91耐热钢 碳原子气团 淬火空位 

分 类 号：TG142.7[一般工业技术—材料科学与工程] TG151.1[金属学及工艺—金属材料]