首页|04Cr13Ni5Mo/20MnMoNb异种钢焊接接头微观组织及性能研究

04Cr13Ni5Mo/20MnMoNb异种钢焊接接头微观组织及性能研究

扫码查看
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.
Microstructure and properties of welded joint of 04Cr13Ni5Mo/20MnMoNb dissimilar metals
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 is γ growing 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.

04Cr13Ni5Mo/20MnMoNb dissimilar metalTIG+SMAW weldingmicrostructuremechanical properties

王有银、武靖伟、王植民、王杰、厚喜荣、王志刚、张建晓、车文斌

展开 >

兰州兰石重型装备股份有限公司,兰州 730314

中国科学院兰州化学物理研究所 固体润滑国家重点实验室,兰州 730000

青岛兰石重型机械设备有限公司,山东青岛 266426

04Cr13Ni5Mo/20MnMoNb异种钢 TIG+SMAW焊接 微观组织 力学性能

2024

压力容器
中国机械工程学会压力容器分会

压力容器

CSTPCD北大核心
影响因子:1.384
ISSN:1001-4837
年,卷(期):2024.41(3)
  • 19