HP-NbM耐热钢异种焊接头组织及性能  

Structures and properties of dissimilar welded joints of HP-NbM heat resistant steel

作　　者：刘国芹 郭景锋 古朝雄 LIU Guoqin;GUO Jingfeng;GU Zhaoxiong(Qingdao NPA Industry Co.,Ltd.,Qingdao 266700,China)

机构地区：[1]青岛新力通工业有限责任公司,山东青岛266700

出　　处：《电焊机》2018年第4期42-46,共5页Electric Welding Machine

摘　　要：采用光学显微镜、电子万能试验机和扫描电子显微镜分析研究HP-Nb M耐热钢与0Cr18Ni10Ti不锈钢、15CrMo钢异种焊接头的微观组织、常温及高温力学性能以及断口形貌。结果表明:焊接头15CrMo端热影响区发生组织转变,铁素体+珠光体转变为铁素体+马氏体;0Cr18Ni10Ti端热影响区析出较多的α相;常温下两种焊接头的屈服强度均高于母材,但是断后伸长率低于母材;高温下两种焊接头的抗拉强度随着应变速率的增加而提高。In this paper,the microstructure,mechanical properties at room temperature and high temperature,and the fracture morp-hology of dissimilar welded joints between HP-NbM heat-resistant steel and 15CrMo steel,0Cr18Ni10Ti stainless steel were analyzed by the optical microscope,electronic universal testing machine,and scanning electron microscope.The results show that the microst-ructure change occurs in the heat-affected zone of 15CrMo,and the ferrite-pearlite structure transforms into the ferrite-martensite structure.Muchα-phase precipitates in the heat-affected zone of 0Cr18Ni10Ti stainless steel.The yield strength of these two welded joints is higher than the base metal,but the percentage elongation after fracture is lower.Under high temperature,higher tensile strength of these two welded joints was obtained with the increase of strain rate.

关 键 词：HP-NbM 异种焊接 接头 耐热钢 

分 类 号：TG457.1[金属学及工艺—焊接]