热模拟方法确定A537钢临界冷速的研究  

Study of critical cooling rate of A537 steel by thermal simulation method

作　　者：路士平 王卫华[1] 李家鼎[1] 

机构地区：[1]首钢技术研究院,北京100043

出　　处：《轧钢》2017年第1期13-15,共3页Steel Rolling

摘　　要：在中厚板淬火工艺中,钢的临界冷速是非常重要的参数,是制定冷却工艺的基础。本试验采用热模拟方法,确定了A537美标容器钢的淬火临界冷速。同时,分析了不同冷速下钢的组织形态和性能。此外,通过EBSD分析了不同冷速下的大小角度晶界的比例以及晶粒的平均尺寸,得到了大小角度晶界以及晶粒尺寸随冷速变化的关系。The critical cooling rate of steel is very important in heavy plate quenching process, and it is the basis of making cooling process. The critical cooling rate of American standard vessel steel A537 was obtained from thermal simulation experiment, and the microstructures and properties of samples by different quenching cooling rate were also analyzed. At the same time, the angle of the grain boundary and the average grain size were analyzed by EBSD under different cooling rate. The relationship between grain boundary angle and grain size with the cooling rate was obtained.

关 键 词：中厚板 淬火 热模拟 临界冷速 金相组织 晶粒尺寸 

分 类 号：TG142.1[一般工业技术—材料科学与工程]