临氢设备用铬钼钢奥氏体晶粒长大规律的研究  

Study on Austenite Growth Law of Cr-Mo Steel for Hydrogen Equipment

作　　者：宋明辉 李艳梅[1] 赵春尧 陈伟男 张晓广 SONG Minghui;LI Yanmei;ZHAO Chunyao;CHEN Weinan;ZHANG Xiaoguang(The State Key Laboratory of Rolling Automation,Northeastern University,Shenyang 110819,China)

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110819

出　　处：《金属材料与冶金工程》2021年第3期10-16,共7页Metal Materials and Metallurgy Engineering

基　　金：“十三五”国家重点研发项目(2017YFB0305301)。

摘　　要：奥氏体晶粒尺寸是影响临氢铬钼钢各项力学性能的重要因素,研究其长大规律对性能的优化尤为重要。本文通过对比分析12Cr2Mo1R和12Cr2Mo1VR两种临氢钢奥氏体化过程中的奥氏体晶粒尺寸及形态,获得了合金元素V对奥氏体晶粒的影响规律,即奥氏体化过程中奥氏体晶粒的长大主要受保温温度的影响,富V元素的M(C,N)型碳化物的钉扎作用是12Cr2Mo1VR钢奥氏体尺寸细小及1050℃粗化时间较12Cr2Mo1R钢滞后的原因。并结合热力学计算结果给出各自淬火温度宜选取的温度范围,为热处理工艺的制定提供参考。Austenite grain size is a major factor affecting various mechanical properties of hydrogen—containing Cr-Mo steel.Thus it is particularly important to study its growth law to optimize the performance.In this paper,the austenite grain size and morphology of 12Cr2Mo1R and 12Cr2Mo1 VR steels during austenitizing process were compared and analyzed.The effect of alloying element V on austenite grain size was figured out,i.e.growth of austenite during austenizing is mainly affected by holding temperature,and the pinning effect of V-rich M(C,N)carbide is the reason why the austenite size of 12Cr2Mo1VR steel is smaller and the coarsening time at 1050 ℃ is later than that of 12Cr2Mo1R steel.And combining the results of thermodynamic calculations,the respective quenching temperature ranges are given in this paper,which provides a reference for the formulation of heat treatment processes.

关 键 词：12CR2MO1R 12Cr2Mo1VR 淬火 晶粒尺寸 

分 类 号：TG174.3+6[金属学及工艺—金属表面处理]