电站高温锅炉管奥氏体异种钢焊接接头失效方式研究  

STUDY ON FAILURE MODE OF WELDED JOINTS FOR AUSTENITE STEEL WITH DISSIMILAR METALS ON HIGH-TEMPERATURE BOILER TUBES IN POWER PLANTS

作　　者：任爱[1] 赵灿[2] 范长信[1] 李耀君[1] 赵彦芬[1] 朱建华[3] 程凤来 

机构地区：[1]国电热工研究院,陕西西安710032 [2]武汉大学,湖北武汉430072 [3]华能淮阴发电有限公司,江苏淮安223001

出　　处：《热力发电》2003年第8期27-31,共5页Thermal Power Generation

摘　　要：对国内应用较广的以 2 .2 5Cr 1Mo为代表的铁素体耐热钢与 30 4H、347H为代表的奥氏体不锈钢组成的异种钢接头长期使用后的老化特征及蠕变强度极限和持久强度极限进行了试验研究 ,从组织老化、性能变化、接头的结构特征、碳迁移及材料的热膨胀系数等方面综合分析了该类接头老化和失效的原因。The aging features, as well as creep rupture strength limit and persistent strength limit of welded joints for austenite steel (such as 304H and 347H stainless steel) with dissimilar metals (such 2.25Cr-1Mo ferrite heatresisting steel etc.) after long-term service have been tested and studied. The said heat-resisting steel has comparatively extensive utilization in our country. The causes leading to aging and failure of the said joints have been comprehensively analysed from several aspects, namely structure aging, peformance variation, features of joint's configuration, carbon migration, and thermal expansion coefficient of materials etc.

关 键 词：电站 高温 锅炉管 奥氏体异种钢 焊接接头 失效方式 

分 类 号：TM621.2[电气工程—电力系统及自动化] TK225[动力工程及工程热物理—动力机械及工程]