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异种铝合金环形构件的搅拌摩擦焊接工艺
马建波, 周庆, 刘西伟, 马帅, 王凯
首都航天机械有限公司, 北京 100076
摘要:
为实现异种铝合金环形构件的高精度装配与连接,文中设计一种卧式串联型轴向移动转径向伸缩的搅拌摩擦焊接工装。结果表明,采用此工装成功实现铝铜系/铝镁系异种铝合金环形构件的高精度装配与高质量焊接,接头内部质量达到了I级接头要求,接头的抗拉强度高于245 MPa,延伸率高于16%,且所有接头均断裂在铝镁系铝合金母材一侧,说明该接头的整体性能要优于铝镁系铝合金母材性能,解决了铝铜系/铝镁系异种铝合金熔焊易出现焊接裂纹的工程难题。
关键词:  异种铝合金环形构件  卧式串联型工装机构  楔盘结构  运动时序  搅拌摩擦焊
DOI:10.12044/j.issn.1007-2330.2018.05.012
分类号:TH16
基金项目:湖南省自然科学基金(2017JJ5056)
Friction Stir Welding Technology for Different Aluminum Alloy Ring Parts
MA Jianbo, ZHOU Qing, LIU Xiwei, MA Shuai, WANG Kai
Capital Aerospace Machinery Company Limited, Beijing 100076
Abstract:
In order to assemble and connect the dissimilar aluminum alloy ring parts accurately, a horizontal friction stir welding tool which can change axial movement into radial expansion was designed. The results show that the Al-Cu/Al-Mg dissimilar aluminum alloy ring parts can be assembled and connected with high precision and high quality. The internal quality of the joint meets the requirement of grade I. The tensile strength and elongation of the joint are higher than 245 MPa and 16%, respectively. Besides, all the joints are broken on the side of Al-Mg based aluminum alloy. It can be concluded that the overall performance of the joint is better than that of Al-Mg based aluminum alloy. Finally, the engineering problem of welding cracks during the Al-Cu/Al-Mg dissimilar aluminum alloy welding is solved.
Key words:  Dissimilar aluminium alloy ring members  Horizontal series tool mechanism  Wedge structure  sequence of movement  Friction stir welding