电焊机2025，Vol.55Issue(9)：91-97,7.DOI:10.7512/j.issn.1001-2303.2025.09.08
Al-Si-Cu药芯焊丝空气钎焊铝合金的接头组织与力学性能
Microstructure and Mechanical Properties of Aluminum Alloy Joints Brazed using Al-Si-Cu Flux-cored Wire in Air
摘要
Abstract
In this study,3003 aluminum(Al)alloys were brazed using Al-Si-Cu flux-cored wire in air.The effects of brazing temperature and holding time on the microstructure and mechanical properties of Al brazed joints were investigated by means of X-ray diffractometer,differential scanning calorimeter,scanning electron microscopy,energy spectroscope,hard-ness test,and shear test.The microstructural characterization indicates that the reaction phases at the joint mainly consisted of AlFeMnSi,Al2Cu,Si and Al2O3.The brazing process window for Al alloys joint was narrow,but a well-bonded interface bonding without obvious welding defects could be achieved at the brazing process of 580-600℃for 25-45 min.The influ-ences of brazing temperature and holding time on the joint microstructure were mainly by controlling the diffusion distance of filler metal to the base metal,residual filler metal in the joint as well as its phase compositions,further affecting the me-chanical properties of joints.The highest joint strength of 114.25±14.50 MPa was achieved at the brazing process of 590℃-35 min,and its corresponding joint center hardness was～200 HV.关键词
铝合金/钎焊/微观组织/力学性能Key words
aluminum alloys/brazing/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
王水庆,娄银斌,刘超峰,曹仕琪,李家诚,李华鑫,贺艳明,杨建国..Al-Si-Cu药芯焊丝空气钎焊铝合金的接头组织与力学性能[J].电焊机,2025,55(9):91-97,7.基金项目
浙江省"尖兵"科技计划项目(2024C01085) （2024C01085）
