电焊机2024，Vol.54Issue(4)：117-122,6.DOI:10.7512/j.issn.1001-2303.2024.04.17
航天器用微泵激光焊接气孔形成机理研究
Porosity Formation Mechanism Research in Laser Welding of Micro-pump
摘要
Abstract
This paper investigates the mechanism of pore formation in the micro-pump laser welding process and analyzes the influence of laser welding speed,defocus amount,type of shielding gas,and blowing method on the porosity of micro-pump weld seams.The research results indicate that as the laser defocus amount increases,the porosity of micro-pump weld seams gradually decreases.When the laser defocus amount is less than +3 mm,the laser welding mode is deep penetration welding,and there are many process-induced pores and metallurgical pores inside the weld seam.When the laser defocus amount is greater than +5 mm,the laser welding mode is heat conduction welding,and the porosity inside the weld seam sig-nificantly decreases.Lowering the welding speed,using N2 as the shielding gas,and adopting the trailing blowing method all contribute to reducing the porosity of micro-pump weld seams.关键词
微泵/激光焊接/气孔/奥氏体不锈钢Key words
micro-pump/laser welding/porosity defect/austenitic stain steel分类
矿业与冶金引用本文复制引用
欧阳自鹏,钱龙根,梅在林,王稳,阮世庭,王江..航天器用微泵激光焊接气孔形成机理研究[J].电焊机,2024,54(4):117-122,6.基金项目
江苏省高校自然科学基金面上项目(20KJB460013) （20KJB460013）
