低碳低合金贝氏体高强度钢热变形奥氏体的连续冷却转变  

CONTINUOUS COOLING TRANSFORMATION OF HOT DEFORMED AUSTENITE FOR A Cr-Mn-Mo-B BAINITE HSLA STEEL

作　　者：李星逸[1] 王轶农[1] 刘文昌[1] 郑炀曾 管秀发 刘月华 

机构地区：[1]佳木斯工学院,燕山大学,沈阳重型机器厂

出　　处：《钢铁》1997年第10期48-51,共4页Iron and Steel

摘　　要：研究了一种Ｃｒ－Ｍｎ－Ｍｏ－Ｂ低碳低合金贝氏体钢热变形后奥氏体的连续冷却转变，获得了试验用钢热变形后奥氏体的连续冷却转变曲线。试验结果表明，本试验用钢不发生先共析铁素体析出的临界冷却速度为０．１５℃／ｓ；冷却速度在０．１５～１．００℃／ｓ范围时可得到全部粒状贝氏体组织；随着冷却速度的降低，粒状贝氏体中的小岛尺寸增大，数目减少。The paper deals with the continuous cooling transformation of hot deformed austenite for a Cr-Mn-Mo-B bainite HSLA steel , and the CCT diagram after hot deformation has been obtained as well. The experimental results show that the critical cooling rate of pro- eutectoid ferrite is 0. 1 5 ℃/s , and the structure of complete granular bainite can be obtained with a cooling rate from 0. 15℃ /s to 1 ℃ /s.

关 键 词：高强度 贝氏体钢 热变形 冷却转变 奥氏体 

分 类 号：TG151.2[金属学及工艺—热处理] TG161[金属学及工艺—金属学]