加热速率对FV520B钢奥氏体化相变动力学的影响  

Effect of heating rate on austenitization kinetics of FV520B steel

作　　者：许文博[1] 魏绍鹏[1] 石伟[1] 王罡[1] 融亦鸣[1] 

机构地区：[1]清华大学机械工程系,北京100084

出　　处：《金属热处理》2016年第2期183-187,共5页Heat Treatment of Metals

基　　金：国家重点基础研究发展计划(973计划)(2011CB013404);国家自然科学基金委员会和中国工程物理研究院联合基金(11176013)

摘　　要：通过热膨胀实验测得了在不同加热速率条件下FV520B钢奥氏体化的膨胀量变化曲线,研究了不同加热速率对相变特征温度和连续奥氏体化动力学的影响,建立了FV520B钢奥氏体化的相变动力学模型,并对其准确性与使用范围进行验证和分析,并根据此模型建立了FV520B钢圆盘工件的热-组织耦合模型,计算了工件加热、保温与淬火过程的温度与组织转变。Dilatometric curves of FV520 B steel subjected to different heating rates were obtained by the dilatometer,the effect of heating rate on austenitization critical temperature and kinetics was investigated and the austenitization kinetics model of FV520 B steel was established. A thermal-microstructure coupled model of large disk-shaped part was achieved based on the austenitization kinetics model. The temperature and the transformation evolution during the heat treatment process were calculated.

关 键 词：FV520B钢 加热速率 奥氏体化动力学 快速升温过程 热-组织耦合模型 

分 类 号：TG111.5[金属学及工艺—物理冶金]