【摘要】 采用爆炸复合工艺,制成Ti-Cu-Zr3层复合钎料坯,经轧制得到0.2mm厚度的钎料箔。研究了Ti-25Cu-25Zr钎料钎焊纯钛的工艺及性能。利用瞬间液相扩散焊原理,分析钎料与钛基体之间的接触反应焊接机制,实验得到钎焊钎缝强度与保温时间的关系。结果表明,钎焊保温时间小于1.0s时,由于钎料组元和钛基体之间的扩散还不充分,接头的断裂载荷在600N以下,断裂发生在钎缝上;钎焊保温时间大于1.0s时,钎料组元和钛基体之间发生了明显的扩散,接头强度显著提高,断裂载荷达到700N,断裂发生在钛基体的热影响区;保温时间在1.0~4.0s范围内时,接头强度趋于一致。更多还原

【Abstract】 Three-layer Ti-Cu-Zr filler metal was developed by explosive cladding and rolling, and the brazing foil of 0.2 mm thickness can be got. The properties of Ti-25Cu-25Zr brazing titanium were studied. The diffusion and contact reaction between the filler metal and titanium base metal was analyzed according to the TLP (Transient Liquid Phase Diffusion Bonding) principle, and the relationship between the holding time and the strength of brazed joint has been got. The results show that when the holding time is less than 1.0 s, the rupture load will below 600 N due to the un-completely diffusion and reaction between the filler metal and the titanium base metal, and a rupture occurs on the brazed joint; comparatively, if the holding time is more than 1.0 s, the rupture load reaches to 700 N, the joint strength can be improved because of the obviously diffusion and reaction happened between the filler metal and the titanium base metal, and the rupture occurs on the heat-affected zone of the titanium. The joint strength would be getting the unity, when the holding time is within the range of 1.0 ~ 4.0 s更多还原