腐蚀对复合银钎料的影响

发布时间：2018-01-07 22:04

本文关键词：腐蚀对复合银钎料的影响　出处：《贵金属》2017年S1期 　论文类型：期刊论文

【摘要】：采用恒温浸泡腐蚀、电化学腐蚀、润湿铺展测试和扫描电子显微镜(SEM)、万能力学试验机等手段研究了复合银钎料中钎剂与钎料合金的腐蚀及钎料腐蚀对钎焊性能的影响。结果表明,银钎料处于含水钎剂环境中,会被钎剂腐蚀。在钎料中加入1.5%~2.5%的Sn,缩小了Ag-Cu-Zn合金中Ag-Zn相与Cu-Zn相之间的电位差,降低了两相之间的微电池效应,Sn细化Ag-Cu-Zn钎料中的共晶相,降低银钎料发生腐蚀的敏感性;用被腐蚀的银钎料钎焊钢,钎焊接头抗拉强度损失,在钎料中添加Sn可抑制损失程度。
[Abstract]:Immersion corrosion at constant temperature, electrochemical corrosion, wet spreading test and scanning electron microscope (SEM) were used. The effect of the corrosion of flux and solder alloy on the brazing performance was studied by means of universal mechanical testing machine. The results show that the silver solder is in the water flux environment. It can be corroded by flux. Adding 1.5% Sn2. 5% Sn2 to the solder reduces the potential difference between Ag-Zn phase and Cu-Zn phase in Ag-Cu-Zn alloy. The microbattery effect between two phases is reduced and the eutectic phase in the Ag-Cu-Zn solder is refined by Sn, and the sensitivity of the silver solder to corrosion is reduced. The loss of tensile strength of brazed joints is reduced by using the corroded silver solder to braze the steel, and the extent of loss can be restrained by adding Sn to the solder.
【作者单位】：郑州机械研究所新型钎焊材料与技术国家重点实验室;
【基金】：国家科技重大专项(2014ZX04001131) 河南省基础与前沿技术研究(162300410027)
【分类号】：TB33;TG425
【正文快照】： 复合钎料包括以下形式:钎料与钎剂复合应用的钎料[1-2];钎料表面或钎料之间复合金属层的钎料,如3003铝合金表面复合4343铝硅钎料[3],粉状复合钎料[4],银钎料-铜-银钎料的三明治钎料[5];原位合成复合钎料[6-7];在一般合金钎料中复合入一定比例的作为增强相的各种形态的高温合金

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