高Cr马氏体耐热钢焊接接头Ⅳ型蠕变断裂研究进展  

Research progress on typeⅣcreep cracking of welded joint of high Cr martensitic heat resistant steel

作　　者：王延锟 刘子昀 马庆爽 张海莲 贺翔 李会军[4] 高秋志 WANG Yan-kun;LIU Zi-yun;MA Qing-shuang;ZHANG Hai-lian;HE Xiang;LI Hui-jun;GAO Qiu-zhi(School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China;State Key Laboratory of Rolling Technology and Automation,Northeastern University,Shenyang 110819,China;Daotian High Technology Co Ltd,Qinhuangdao,Qinhuangdao 066000,China;School of Materials Science and Engineering,Tianjin University,Tianjin 300354,China)

机构地区：[1]东北大学秦皇岛分校资源与材料学院,河北秦皇岛066004 [2]轧制技术及连轧自动化国家重点实验室,东北大学,辽宁沈阳110819 [3]秦皇岛市道天高科技有限公司,河北秦皇岛066000 [4]天津大学材料科学与工程学院,天津300354

出　　处：《材料热处理学报》2021年第10期1-17,共17页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金钢铁联合研究基金重点项目(U1960204);国家自然科学基金面上项目(51871042);中央高校基本科研业务费(N2023026)。

摘　　要：Ⅳ型蠕变断裂是焊接接头细晶区在高温、低应力下发生的沿晶脆性断裂,对高Cr马氏体耐热钢焊接接头的高温蠕变性能具有重要影响。本文详细分析了Ⅳ型蠕变断裂过程中的组织转变、断裂机理以及接头的组织变化、多轴应力状态和焊接残余应力对其蠕变性能的影响,并提出了相应的控制措施。同时对现阶段关于高Cr马氏体耐热钢焊接接头Ⅳ型蠕变断裂的研究中存在的问题及盲点进行了分析与概括。TypeⅣcreep cracking is an intergranular brittle fracture in the fine-grained heat-affected zone(FGHAZ)of welded joint under high temperature and low stress,which has an important influence on the high temperature creep properties of high Cr martensitic heat resistant steel welded joint.In this paper,the microstructure evolution and fracture mechanism in the process of type Ⅳ creep cracking,as well as the influence of the microstructure change,multiaxial stress state and welding residual stress on the creep properties of the joint are analyzed in detail,and the corresponding control measures are put forward.At the same time,the existing problems and blind spots in the research on the type Ⅳ creep cracking of welded joint of high Cr martensitic heat resistant steel are analyzed and summarized.

关 键 词：马氏体耐热钢 蠕变断裂 焊接接头 

分 类 号：TG457[金属学及工艺—焊接]