厚壁12Cr1MoVG高压锅炉管热处理工艺优化研究  

Study on Optimization of Heat Treatment Process for 12Cr1MoVG Heavy-wall High-pressure Boiler Tube

作　　者：张行刚[1] 张昭[1] 郭志文[1] 米永峰[1] ZHANG Xinggang;ZHANG Zhao;GUO Zhiwen;MI Yongfeng(Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou014010,China)

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心

出　　处：《钢管》2019年第6期34-37,共4页Steel Pipe

摘　　要：通过对现有经热处理工艺热处理后的12Cr1MoVG高压锅炉管的力学性能不合格情况进行统计分析,指出热处理生产的难点,提出一种"间歇式淬火+回火"热处理工艺。分析认为:控制正火后的冷却速度,使厚壁12Cr1MoVG高压锅炉管的组织以铁素体+贝氏体为主,是保证其具有良好综合力学性能的关键。大生产应用结果表明,采用"间歇式淬火+回火"热处理工艺,完全能生产出满足GB/T 5310-2017标准和用户要求的12Cr1MoVG高压锅炉管。Statistically analyzed are the present non-conformance data concerning the mechanical properties of the 12Cr1MoVG high-pressure boiler pipes as having been heat treated,which leads to identification of the operation difficulties related to the said heat treatment.Accordingly a heat treatment process of“intermittent quenching plus temper-ing”is proposed.It is also regarded via the analysis that the critical step for ensuring the good comprehensive mechanical performance of the said heavy-wall hi-pressure boiler pipe is properly controlling the after-normalization cooling speed to guarantee that the microstructure of the said pipe is mainly composed by ferrite+bainite.The result of relevant massive production demonstrates that thanks to the above mentioned heat treatment process,it is completely practical to produce the 12Cr1MoVG high-pressure boiler pipe as satisfactory to the applicable GB/T 5310-2017 specification and relevant customer requirements.

关 键 词：高压锅炉管 12Cr1MoVG钢 厚壁 热处理 间歇式淬火 冷却速度 

分 类 号：TG156[金属学及工艺—热处理]