86CrMoV7钢热变形奥氏体的TTT图  

TTT CURVES OF HOT DEFORMED AUSTENITE OF 86CrMoV7 STEEL

作　　者：肖福仁[1] 乔桂英[1] 廖波[1] 

机构地区：[1]燕山大学材料化工学院,秦皇岛066004

出　　处：《钢铁》2000年第5期51-54,共4页Iron and Steel

基　　金：机械工业部发展基金资助项目! (88J2 0 0 5 )

摘　　要：采用膨胀法测定了 86Cr Mo V7钢 90 0℃奥氏体化ε=1s- 1,ε=0 .4热变形前后过冷奥氏体等温转变曲线。结果表明 :热变形明显促进珠光体、贝氏体转变。变形提高了珠光体、贝氏体的形核率 ;对珠光体长大速度影响不大 ;但抑制贝氏体长大 ;The TTT curves of 86CrMoV7 steel before and after hot deformation with =1 s -1 ,ε=0 4 at 900 ℃ has been determined by method of expansion. The results show that the hot deformation notably accelerates pearlite and bainite transformation. Hot deformation increases the rate of nucleation of pearlite and bainite. Hot deformation has no effect on the rate of growth of pearlite, but restrains the growth of bainite, thus leading to refine pearlite and bainite structure.

关 键 词：形变 TTT图 珠光体转变 贝氏体转变 86CRMOV7钢 

分 类 号：TG151.3[金属学及工艺—热处理] TG142.33[金属学及工艺—金属学]