电焊机2024，Vol.54Issue(10)：93-98,6.DOI:10.7512/j.issn.1001-2303.2024.10.11
基于粉末压片技术的新型复合焊锡片制备工艺研究
Study on the Preparation Process of Novel Composite Solder Sheet Based on Powder Pressing Technology
王思鸿 1李晨 1黄世盛 1陈飘飘 1费松华 1刘家军1
作者信息
- 1. 浙江省华光新型绿色钎焊材料重点企业研究院,浙江 杭州 311100||杭州华光焊接新材料股份有限公司,浙江 杭州 311100
- 折叠
摘要
Abstract
This study aims to investigate the application of powder pressing technology in the preparation of composite solder sheets and to research the effects of different pressing process parameters on the mechanical properties,microstructure,and brazing performance of composite solder sheets.SAC305 alloy powder and self-developed flux were pre-mixed and then pressed into composite solder sheets using powder pressing technology.A three-level three-factor orthogonal experiment was designed to analyze the effects of pressure,pressing temperature,and pressing time on the properties of the composite solder sheets.The results show that pressure is the most significant pressing parameter affecting the properties of the composite sol-der sheets.When the pressure is insufficient,the microstructure of the composite solder sheet exhibits distinct interface distinc-tions between tin alloy powder particles,with a small powder deformation and a high porosity.With increasing pressure,the powder undergoes obvious deformation,the interfaces become blurred,and the porosity decreases.The effects of pressing tem-perature and pressing time on the brazing performance of the composite solder sheets are significant,as high temperatures or prolonged pressing times can lead to increased oxidation of the tin powder and reduced flux activity,thereby decreasing braz-ing performance and increasing the rate of post-welding porosity.The effects of different process parameters on brazing expan-sion rate and cavity rate are relatively small.Composite solder sheets prepared under the conditions of 5,000 MPa pressure,30 s pressing time,and 60 ℃ temperature exhibit good brazing performance,with a minimum porosity of 7.2%and certain self-strength.These sheets demonstrate good wettability on nickel sheets and a post-welding cavity rate of less than 0.1%.Com-pared with traditional pre-formed solder sheets with surface-applied flux,the powder-pressed composite solder sheets have equivalent brazing performance and higher yield,making them technically feasible for batch application.关键词
复合焊锡片/粉末压片/钎焊性能/压制工艺Key words
solder sheet/powder pressing/soldering property/pressing technology分类
矿业与冶金引用本文复制引用
王思鸿,李晨,黄世盛,陈飘飘,费松华,刘家军..基于粉末压片技术的新型复合焊锡片制备工艺研究[J].电焊机,2024,54(10):93-98,6.
