机械制造与自动化2026，Vol.55Issue(4)：24-28,5.DOI:10.19344/j.cnki.issn1671-5276.2026.04.005
光学元件激光热导钎焊连接变形及接头组织性能研究
Research on Connection Deformation and Joint Microstructure Properties of Optical Components by Laser Thermal Conduction Brazing
摘要
Abstract
To address the challenge of rapid connection between the 40Cr optical component adjustment mount and the optical path assembly mounting plate during alignment and assembly,the conventional welding structure was improved.By pre-brazing copper sheets and employing laser indirect irradiation thermal conduction brazing technology,welding deformation was successfully reduced,and without clamping the adjustment mount,the displacement deviations relative to the mounting plate in three directions was controlled within 20 μm,the angular deviation was less than 0.05°,and the tensile strength of the brazed joint reached 289 MPa.The experiments used a paste-form silver-based filler metal(AgCuZnSn)under the process conditions of a laser beam inclination of 60°,defocusing amount of 20 mm,power of 0.12 kW,and heating time of 10 s.Scanning electron microscopy and energy-dispersive spectroscopy were employed to test and analyze the brazed joints.The results show that the obtained brazing seam structure is uniform,dense,continuous,and intact.The interfaces between the 40Cr steel base material,filler metal zone,and copper sheet zone are distinct,and elemental diffusion between the 40Cr steel and the filler metal is limited to a 2-3 μm zone only at the interface bond,indicating minimal microstructural changes and stress concentration during the welding process.关键词
光学元件/激光热导钎焊/40Cr钢/焊接变形/组织性能Key words
optical component/laser thermal conduction brazing/40Cr steel/welding deformation/microstructural performance分类
矿业与冶金引用本文复制引用
尚康,乔晓旭,王晓东,罗怡..光学元件激光热导钎焊连接变形及接头组织性能研究[J].机械制造与自动化,2026,55(4):24-28,5.基金项目
辽宁省"兴辽英才计划"项目(XLYC2002020) （XLYC2002020）
