X19CrMoVNbN11-1叶片钢的晶粒长大行为  

Grain growth behavior of X19CrMoVNbN11⁃1 blade steel

作　　者：宋明强 王贺 宋晶晶 刘松锋 Song Mingqiang;Wang He;Song Jingjing;Liu Songfeng(Turbine Plant,Shanghai Electric Power Generation Equipment Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]上海电气电站设备有限公司上海汽轮机厂,上海200240

出　　处：《金属热处理》2024年第1期108-112,共5页Heat Treatment of Metals

基　　金：“十二五”国家高技术研究发展计划(2012AA03A502)。

摘　　要：通过对3组X19CrMoVNbN11-1叶片钢进行不同的热处理,研究加热温度、保温时间、升温速率和原始状态对奥氏体晶粒长大的影响规律。结果表明,X19CrMoVNbN11-1钢奥氏体晶粒长大规律的显著差异主要受原始组织状态的影响,各热处理参数对晶粒长大的影响排序为:加热温度>升温速率>加热时间;500℃/h速率升温至1050℃保温3 h后空冷正火预处理,可有效改善X19CrMoVNbN11-1钢后续调质处理后的晶粒度等级及均匀性,使1100℃保温3 h调质处理后的晶粒度控制在5~6级水平。在试验条件下,该钢在1100℃保温时,适当的升温速率(500℃/h)和保温时间(3 h)可获得较好的晶粒细化效果。Effects of heating temperature,holding time,heating rate and original state on austenite grain growth of X19CrMoVNbN11⁃1 blade steels were studied by 3 groups different heat treatment.The results show that the growth low of austenitic grain of the X19CrMoVNbN11⁃1 steel is significantly different,which is mainly affected by the original microstructure.The order of effects of various heat treatment parameters on grain growth is,heating temperature,heating rate,heating time.The grain size grade and uniformity of the X19CrMoVNbN11⁃1 steel after subsequent quenching and tempering can be effectively improved after heating at 500℃/h to 1050℃for 3 h,and the grain size can be controlled at the level of 5⁃6 grade after heating at 1100℃for 3 h.Under the test conditions,when the steel is heating at 1100℃,the appropriate heating rate(500℃/h)and holding time(3 h)can achieve better grain refinement effect.

关 键 词：耐热钢 叶片钢 晶粒长大 正火预处理 

分 类 号：TG668[金属学及工艺—金属切削加工及机床]