含钒汽车大梁钢P510L连续冷却时的组织转变  

Transformation of V-bearing Steel P510L for Chassis Frame Girder During Continuous Cooling

作　　者：郑东升[1] 朱伏先[1] 李艳梅[1] 刘勇 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004 [2]攀枝花钢铁集团有限责任公司热轧板厂,四川攀枝花617067

出　　处：《东北大学学报（自然科学版）》2009年第5期665-668,共4页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2001AA332020-01)

摘　　要：用MMS-200热力模拟试验机研究了含钒汽车大梁钢P510L在连续冷却条件下的组织演变规律,采用热膨胀法结合金相法建立了P510L的静态CCT曲线和动态CCT曲线,分析了变形条件、冷却速度对P510L显微组织的影响.结果表明:奥氏体低温区的变形促进了铁素体相变和珠光体相变,抑制了贝氏体相变;并且随着冷却速度的增大,铁素体的量减少,贝氏体的量增多.The transformation behavior of V-bearing steel P510L for chassis frame girder under continuous cooling was investigated by means of MMS- 200 thermomechanical simulator, with the CCT curves given statically and dynamically by thermal dilation in combination with metallography. The influences of deformation condition and cooling rate on the microstructure of the steel were analyzed. The results showed that the transformation of ferrite and pearlite is stimulated but that of bainite is inhibited through the deformation of austenite in low-temperature region, and the ferrite amount decreases and bainite amount increases with increasing cooling rate.

关 键 词：含钒钢 汽车大梁钢 连续冷却转变曲线 显微组织 变形 冷却速度 

分 类 号：TG151.2[金属学及工艺—热处理] TG151.3[金属学及工艺—金属学]