镍基非晶态及晶态钎料真空钎焊时母材在钎料中溶解特性的研究

STUDIES ON THE DISSOLUTION CHARACTERISTICS OF STAINLESS STEEL BASE METAL IN THE LIQUID NICKELBASED AMORPHOUS AND CRYSTALLINE BRAZING FILLER METALS DURING VACUUM BRAZING PROCESS

以高温钎焊时液态钎料对母材溶解厚度的定量计算模型为基础，考察了采用Ｎｉ８２Ｃｒ７．５Ｓｉ４．５Ｂ３Ｆｅ３成分的镍基非晶态及晶态钎料真空高温钎焊１Ｃｒ１８Ｎｉ９Ｔｉ不锈钢时钎料对母材的溶解特性，深入研究了钎焊温度、钎焊保温时间以及钎焊间隙等参数对母材溶解厚度的影响。结果表明，钎焊温度对母材溶蚀的影响比钎焊保温时间剧烈，而钎焊间隙增加明显促进了母材的溶解，采用母材溶解厚度计算模型可对溶蚀控制条件下的钎焊规范及钎焊间隙等参数进行优化匹配。

Based on the model of quantitatively calculating the dissolution thickness of the base metal in liquid brazing filler metals, the dissolution characteristics of stainless steel base metal(1Cr18Ni9Ti) in the liquid Nickel-based (Ni82Cr7.5 Si4.sB3Fe3) amorphous and crystalline brazing filler metals during the vacuum brazing process was investigated. The influences of the brazing temperature and the brazing holding time as well as the brazing clearance on dissolution thickness of base metal during vacuum high temperature brazing have also been considered in detail. The results indicate that the brazing temperature has a more evident effect on dissolution thickness of base metal than the brazing holding time, and the wider for brazing clearance the larger for dissolution thickness of base metal, and the quantitative formula of estimating the dissolution thickness of base metal can be used to optimize the brazing parameters.