摘要
为提高04Cr13Ni5Mo超级马氏体不锈钢和20MnMoNb高强钢的焊接效率和其焊接机理,采用手工钨极氩弧焊(TIG)+焊条电弧焊(SMAW)对同等厚度的两异种材料进行焊接,并通过金相显微镜、扫描电子显微镜、能谱仪、X射线分析仪和硬度计等,研究了04Cr13Ni5Mo/20MnMoNb异种金属焊接接头微观组织和力学性能。结果表明:采用TIG+SMAW焊接可以实现04Cr13Ni5Mo/20MnMoNb异种钢的有效焊接;焊缝区域组织为γ相,从底部垂直于熔合线向上生长,Ni,Cr,Mo,Fe四种元素含量从04Cr13Ni5Mo侧向20MnMoNb侧均呈明显的梯度分布特征;接头的抗拉强度略低于两侧母材,达到04Cr13Ni5Mo超级马氏体不锈钢的92%,达20MnMoNb母材的98.2%,断裂类型为解理断裂+韧性断裂的混合型断裂;焊缝区域的硬度较两侧母材高,冲击吸收能量介于76.3~84.9 J之间。该研究对TIG+SMAW组合焊接在超级马氏体与高强钢焊接领域推广应用奠定一定的基础。
In order to improve the welding efficiency and welding mechanism of 04Cr13Ni5Mo super martensitic stainless steel and 20MnMoNb high-strength steel,manual tungsten inert gas arc welding(TIG)+electrode arc welding(SMAW)was used to weld two different materials of the same thickness.The microstructure and mechanical properties of the welded joint of 04Cr13Ni5Mo/20MnMoNb dissimilar metals were studied using metallographic microscopy,scanning electron microscopy,energy dispersive spectroscopy,X-ray analyzer,and hardness tester.The results show that TIG+SMAW welding can effectively bond 04Cr13Ni5Mo and 20MnMoNb dissimilar steels;The microstructure of the weld seam area isγgrowing from the bottom perpendicular to the fusion line,the contents of Ni,Cr,Mo,and Fe show a clear gradient distribution from 04Cr13Ni5Mo to 20MnMoNb;The tensile strength of the joint is slightly lower than that of the base metal on both sides,reaching 92%of the 04Cr13Ni5Mo super martensitic stainless steel and 98.2%of the 20MnMoNb base metal.The fracture type is a mixture of cleavage fracture and ductile fracture;The hardness of the weld area is higher than that of the base metal on both sides,and the impact absorption energy ranges from 76.3 J to 84.9 J.This study lays a certain foundation for the promotion and application of TIG+SMAW combination welding in the field of super martensite and high-strength steel welding.
作者
王有银
武靖伟
王植民
王杰
厚喜荣
王志刚
张建晓
车文斌
WANG Youyin;WU Jingwei;WANG Zhimin;WANG Jie;HOU Xirong;WANG Zhigang;ZHANG Jianxiao;CHE Wenbin(Lanzhou LS Heavy Equipment Co.,Ltd.,Lanzhou 730314,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Qingdao LS Heavy Machinery Equipment Co.,Ltd.,Qingdao 266426,China)
出处
《压力容器》
北大核心
2024年第3期17-23,29,共8页
Pressure Vessel Technology
