王蒙,张冠星,钟素娟,沈元勋,龙伟民,董宏伟,刘晓芳.低熔合金粉末对药芯银钎料钎焊过程的影响[J].稀有金属材料与工程,2021,50(8):2859~2866.[Wang Meng,Zhang Guanxing,Zhong Sujuan,Shen Yuanxun,long Weimin,Dong Hongwei,Liu Xiaofang.Effect of low-melt alloy powder on brazing process of flux-cored silver brazing filler metal[J].Rare Metal Materials and Engineering,2021,50(8):2859~2866.]
低熔合金粉末对药芯银钎料钎焊过程的影响
投稿时间:2020-08-28  修订日期:2020-10-17
中文关键词:  原位合成  药芯银钎料  润湿性  显微组织  抗拉强度
基金项目:中原科技创新领军人才(ZYQR20180030);郑州市重大科技创新专项(2019CXZX0065)
中文摘要:
      为克服高锡含量的AgCuZnSn钎料因脆性大而难以加工成形的问题,借鉴药芯焊丝的理念,设计了添加CuSn合金粉粉芯的复合药芯银钎料,研究了粉芯中添加30wt%~70wt%Cu60Sn40合金粉对药芯银钎料的润湿性、紫铜/Q235钢钎焊接头组织、界面显微硬度及抗拉强度的影响。结果表明,钎焊过程中芯部CuSn合金粉和外层BAg30CuZnSn原位反应合成高锡含量的AgCuZnSn钎料,获得了成分均匀,结合良好的接头组织。随着药芯粉芯中合金粉含量的升高,复合药芯银钎料在紫铜板及Q235钢板上的润湿面积不断增大,Cu/Q235钢钎焊接头显微硬度不断升高,抗拉强度呈现先升高后降低的趋势。当药芯粉芯中CuSn合金粉的含量为30wt%时,Cu/Q235钢钎焊接头的抗拉强度取得最大值(198.91MPa),提高了23.4%。
Effect of low-melt alloy powder on brazing process of flux-cored silver brazing filler metal
英文关键词:In-situ synthesis  flux-cored silver brazing filler metal  wettability  microstructures  tensile strength
英文摘要:
      To overcome AgCuZnSn filler metal with high tin content is difficult to form for its high brittleness, a composite flux-cored silver filler metal with CuSn alloy powder core was designed based on the concept of flux-cored wire. The effects of 30wt%~70wt%Cu60Sn40 alloy powder on the wettability, microstructure, interfacial microhardness and tensile strength of silver filler metal, copper/Q235 steel brazing joint were studied. The results show that AgCuZnSn filler metal with high tin content is in-situ synthesis by CuSn alloy powder in core and BAg30CuZnSn of outer layer during brazing process, and uniform composition with good joint structure was obtained. With the increase of the content of alloy powder in the core, the wetting area of composite flux-cored silver solder on copper plate and Q235 steel plate is promoted constantly, the microhardness of copper/Q235 steel brazing joint is rised continuously, and the tensile strength is increased first and then decreased. When the content of CuSn alloy powder in the powder core is 30wt%, the maximum tensile strength (198.91MPa) of Cu/Q235 steel brazing joint is obtained, which is enhanced by 23.4% compared with the core silver brazing filler metal without alloy powder added.
作者单位E-mail
王蒙 郑州机械研究所有限公司 wm18838150358@163.com 
张冠星 郑州机械研究所有限公司  
钟素娟 郑州机械研究所有限公司  
沈元勋 郑州机械研究所有限公司  
龙伟民 郑州机械研究所有限公司  
董宏伟 郑州机械研究所有限公司  
刘晓芳 郑州机械研究所有限公司  
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