摘要
【目的】旨在探究机器人自动打磨对铝合金搅拌摩擦焊接头微观组织和力学性能的影响,为提高火箭贮箱类产品研制生产自动化提供技术基础。【方法】针对8mm厚航天用2A14铝合金,研究了打磨前后接头表面形貌、微观组织及力学性能的差异。【结果】结果表明,在优化后的打磨工艺参数下,自动化打磨能够有效去除焊接飞边,打磨区域母材到焊缝圆滑过渡,打磨焊缝较原始焊缝减薄约0.3mm。打磨后接头微观组织、力学性能与未打磨接头相比无差别,打磨接头抗拉强度和断后伸长率分别为351MPa和6.3%。【结论】通过自动化打磨的接头表面形貌和力学性能满足火箭贮箱用铝合金中厚板技术指标要求。
[Objective]The aim is to explore the influence of robotic automatically flash grinding on microstructure and mechanical properties of friction stir welded(FSWed)joints,providing technology foundation for improving production automation of rockets storage tanks.[Methods]The surface morphology,microstructure and mechanical properties of aerospace 2A14 Al alloy joints with 8 mm thickness before and after grinding is compared.[Results]Under the optimized grinding process,FSWed flashes are removed effectively with the weld thinning of 0.3 mm,and joint surface between base metal and weld is smoothly transited.The grinding process has no effect on microstructure and mechanical properties of 2A14 Al alloy’s FSWed joints.The ultimate tensile stress and final elongation of the joints after grinding are 351 MPa and 6.3%respectively.[Conclusion]The surface morphology and mechanical properties of the joints after automatically grinding meets the demand for aerospace production of aluminum alloy plate with medium thickness.
作者
李峻臣
陈思浩
张自立
历吴恺
赵耀邦
徐爱杰
LI Junchen;CHEN Sihao;ZHANG Zili;LI Wukai;ZHAO Yaobang;XU Aijie(Shanghai Spaceflight Precision Machinery Institute,Shanghai 201600,China)
出处
《焊接》
2025年第9期83-89,共7页
Welding & Joining
关键词
搅拌摩擦焊
2A14铝合金
飞边打磨
微观组织
力学性能
friction stir welding
2A14 Al alloy
flash grinding
microstructure
mechanical properties
