Abstract W-Cu composite and 18-8 stainless steel were vacuum brazed with an improved Ni-based filler metal, with varying Ti content. The microstructure, element distribution, phase composition, and fracture mechanism of the brazed joints were investigated. The improved NiCrSiBFe-Ti quench filler metal showed good wettability on the W-Cu composite and 18-8 stainless steel. Enhanced diffusion and metallurgical reactions between the filler metal and base metal were observed. The addition of Ti not only optimized the structure, but also reduced the formation of brittle intermetallic compounds, which is important for significantly improving the brazed-joint strength. The highest brazed-joint shear strength (381 MPa) was observed when the Ti content was 1.6%.

中文翻译：

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Ni-Ti填料对钎焊W-Cu/18-8接头的影响

摘要 W-Cu 复合材料和 18-8 不锈钢采用改进的 Ni 基填充金属进行真空钎焊，Ti 含量不同。研究了钎焊接头的显微组织、元素分布、相组成和断裂机理。改进的 NiCrSiBFe-Ti 淬火填充金属对 W-Cu 复合材料和 18-8 不锈钢表现出良好的润湿性。观察到填充金属和母材之间的扩散和冶金反应增强。Ti的加入不仅优化了结构，而且减少了脆性金属间化合物的形成，这对于显着提高钎焊强度具有重要意义。当 Ti 含量为 1.6% 时，观察到最高的钎焊接头剪切强度 (381 MPa)。