6082铝合金轴肩辅助加热摩擦塞补焊接头组织及温度分布  

Microstructure and Temperature Distribution of 6082 Aluminum Alloy Friction Plug Repair Welding Joint by Shoulder Auxiliary Heating

作　　者：李德福 王希靖[1,2] 赵早龙[2] LI Defu;WANG Xijing;ZHAO Zaolong(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;School of Railway Technology,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050 [3]兰州交通大学铁道技术学院,甘肃兰州730070

出　　处：《热加工工艺》2024年第3期48-52,共5页Hot Working Technology

基　　金：国家自然科学基金项目(2012ZX04008011);甘肃省高等学校创新基金项目(2021A-045)。

摘　　要：采用轴肩辅助加热方法实现了5 mm厚6082铝合金板匙孔类缺陷摩擦塞补焊修复,分析了摩擦塞补焊接头的组织和力学性能。结果表明:接头焊核区为细小等轴晶,结合面区为过渡区,轴肩影响区分层明显,热力影响区晶粒发生弯曲变形,热影响区保留了母材板条状组织。接头显微硬度均高于母材,在厚度方向上存在各层异性;抗拉强度最高达285.7 MPa,为母材的92.2%,断口呈韧性断裂特征。焊接热输入和材料热塑性变形,是接头不同区域显微组织存在明显差异的根本原因。The shaft shoulder auxiliary heating process was used to realize the friction plug repair of keyhole defects of 5 mm thick 6082 aluminum alloy plate,and the microstructure and mechanial properties of the friction plug repair welding joint were analyzed.The results show that the weld nugget area of the joint is fine equiaxed crystal,the bonding surface zone is the transition area,the shaft shoulder affected area has obvious layered structure,the grains in the thermal affected area are bent and deformed,and the strip structure of the parent material is retained in the thermal affected area.The microhardness of the joint is higher than that of the base material,and it is different in thickness direction.The tensile strength is up to 285.7 MPa,which is 92.2%of the base material,and the fracture is characterized by ductile fracture.Weld heat input and thermoplastic deformation are the main reasons for the difference of microstructure in different areas of joint.

关 键 词：轴肩辅助加热 摩擦塞补焊 温度分布 显微组织 

分 类 号：TG453.9[金属学及工艺—焊接]