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采用Ag-Cu-Ti钎料进行了钛合金与不锈钢异种金属组合薄壁小直径管路结构的真空高频感应钎焊工艺试验研究,重点分析了钎焊工艺对钛合金与不锈钢管路真空高频感应钎焊接头质量与性能的影响因素,并观察分析了钎焊接头的微观组织和接头区域成分。研究表明,通过应用本试验研究获得的最佳工艺参数能够获得内外部质量、密封性能和力学性能优良的接头;接头形式是影响钛合金与不锈钢高频感应钎焊接头质量与性能的最主要因素,不锈钢作为外套管形式的钎焊接头性能要远远优于钛合金作为外套管形式的接头性能,此外,装配间隙和搭接长度也会明显影响接头的承载能力。研究结果对于钛合金与不锈钢等异种金属管路焊接结构在卫星等重要航天器中的应用具有重要意义。
The experiment of vacuum high-frequency induction brazing of thin-walled small-diameter pipe structure of dissimilar metal combination of titanium alloy and stainless steel was carried out by using Ag-Cu-Ti brazing filler metal. The vacuum brazing of titanium alloy and stainless steel pipe was analyzed emphatically Frequency induction brazing joint quality and performance factors, and observed and analyzed the microstructure of brazed joints and joint area composition. The results show that the best technological parameters obtained through the application of this experimental study can obtain the joint with excellent internal and external quality, sealing performance and mechanical properties. The joint form is the most important factor affecting the quality and performance of the titanium alloy and stainless steel high frequency induction brazed joint , The performance of stainless steel as an outer sleeve brazed joint is far superior to that of a titanium alloy as an outer sleeve. In addition, the assembly gap and lap length also significantly affect the joint carrying capacity. The research results are of great significance to the application of dissimilar metal pipe welding structures such as titanium alloy and stainless steel in the important spacecraft such as satellite.