李婧,王秉新,刘相华,赵德文

• 1:辽宁石油化工大学机械工程学院
• 2:东北大学轧制技术及连轧自动化国家重点实验室

摘要(Abstract)：

针对Q420钢特厚板的生产工艺特点,利用Gleeble-2000热模拟试验机研究了该钢变形和未变形条件下的连续冷却过程中相变行为及组织演变规律,绘制了该钢的连续冷却转变(CCT)曲线,分析了控轧控冷工艺对其连续冷却相变的影响。结果表明:Q420钢随着冷却速度的提高,奥氏体→铁素体开始转变温度Ar3降低,相变后铁素体晶粒细化;贝氏体开始转变温度(Bs)先升高后降低,贝氏体转变量逐渐增加。随着变形量的增加,CCT曲线整体向左上方移动,加速了铁素体和贝氏体相变。随着变形温度的降低,铁素体相变温度升高,扩大了铁素体区,贝氏体相变温度降低。

关键词(KeyWords)： 特厚板;连续冷却;相变;CCT曲线

Abstract:

Keywords:

基金项目(Foundation): 辽宁省博士启动基金(20131062)

作者(Author): 李婧,王秉新,刘相华,赵德文

DOI: 10.13289/j.issn.1009-6264.2015.02.025

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