温度对锌铝药芯钎料用钎剂组织和性能的影响

Effect of Temperature on Microstructure and Properties of Flux Used in Zinc-Aluminum Cored Solder

通过SEM、XRD等方法研究了不同温度处理的Cs F-A1F3钎剂的显微组织、相组成、流布形态、去膜性能及对钎料的润湿性。研究发现:随着温度升高,钎剂显微组织中絮状物逐渐减小并最终消失,同时产生大量棒条状及块状组织。465℃处理的钎剂出现了新相Al2O3。流布试验中,钎剂均在纯铝板表面产生润湿环;随温度的升高,流布面积升高,而钎剂对钎料的润湿性下降;465℃处理钎剂的流布面积较空白钎剂提高11.5%,而润湿面积较空白钎剂下降了29.9%。去膜试验中,随深度的增加,O和Zn含量均呈现此消彼长的态势,且采用285℃处理的钎剂时Zn含量最高。

The microstructure, phase composition and properties of flow distribution, film-removal and wettability to brazing alloy of Cs F-A1F3 flux heated at different temperatures were studied by means of scanning electron microscopy, XRD and other methods. The results shows that with the increase of temperature, the floccules in the microstructure of flux decrease and disappear finally, and a large number of bar-like and massive structures form. Meanwhile, new phase Al2O3 appears when the flux is heated at 465 ℃. In the flow distribution test, wetting rings appear on the surface of the pure aluminum plate. With the temperature increasing, the flow area of the flux increases, while the wettability to brazing alloy decreases. The flow distribution area of the flux heated at 465 ℃ increases by 11.5% than the blank flux(without heat treatment), and the wetting area of the flux heated at 465 ℃ reduces by 29.9% than that of the blank flux. In the film-removal test, the contents of O and Zn are both changed in a way of shift, and Zn content is the highest by using the flux heated at 285 ℃.