电焊机2024，Vol.54Issue(2)：110-115,6.DOI:10.7512/j.issn.1001-2303.2024.02.17
电机转子感应钎焊用钎料钎剂性能对比和失效分析
Failure Analysis and Performance Comparison of Brazing Filler Metals for Induction Brazing Motor Rotor
摘要
Abstract
In order to investigate the reasons of product failure resulting from a lot of pores and inclusions at the interface of brazing joints during induction brazing motor rotors using the same grade filler metals produced by different manufacturers,the oxygen content,microstructure and tensile strength of domestic and Indian brazing materials were compared,and the ef-fects of different brazing materials combinations on wettability and brazing joint strength were investigated.The results showed that the average tensile strength of the domestic filler metal was 382.7 MPa,which was 3.8%higher than that of the Indian filler metal.The Indian filler metal with high oxygen content was more likely to form oxidation inclusions with Ca,Fe,P and other inclusion elements in the raw materials,resulting in a significant decrease in the strength of the filler metal.Furthermore,the average wetting area of domestic brazing materials was 286.96 mm2,which was 36.7%higher than that of Indian brazing materials.During brazing with Indian brazing materials,numerous residues containing F and K as well as oxi-dized slag were present in the braze zone,resulted reduced joint strength.Therefore,it was crucial not only to select clean filler metal with excellent fluidity and performance during brazing,but also consider choosing an appropriate flux exhibits high activity levels.关键词
银基钎料/钎剂/氧含量/微观组织/抗拉强度Key words
silver based brazing filler metal/flux/oxygen content/microstructure/tensile strength分类
矿业与冶金引用本文复制引用
张冠星,潘建军,常云峰,刘晓芳,薛行雁,郭艳红..电机转子感应钎焊用钎料钎剂性能对比和失效分析[J].电焊机,2024,54(2):110-115,6.基金项目
河南省重大科技创新专项(201110210600) （201110210600）
