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采用Ti-Nb中间层对TiC金属陶瓷和不锈钢06Cr19Ni10进行了脉冲加压扩散连接,以实现缩短焊接时间并缓解界面产物对接头的有害作用的目的。连接温度890℃,脉冲压力2~10 MPa工艺条件下,在4~12 min时间内即实现了陶瓷与不锈钢的有效连接,与传统扩散焊相比连接时间大幅缩短。对接头进行显微组织表征发现在反应界面处存在溶解了少量Nb的σ相以及溶解了Ni的α+β-Ti固溶体。在连接时间为10 min时得到了最大的剪切强度110 MPa。在剪切载荷下,接头沿着剩余的Ti/α+β-Ti界面扩展至陶瓷内部断裂。结果表明,脉冲加压扩散连接能在一定程度上缩短焊接时间,中间层Ti/Nb的合理选择能很好的抑制有害的金属间化合物的生成。
The Ti-Nb intermediate layer was used to pulse-pressure diffuse the TiC cermet and the stainless steel 06Cr19Ni10 for the purpose of shortening the welding time and alleviating the detrimental effect of the interface products on the joint. Connection temperature 890 ℃, pulse pressure 2 ~ 10 MPa process conditions, in 4 ~ 12 min time to achieve the effective connection of ceramic and stainless steel, compared with the traditional diffusion welding significantly shorten the connection time. The microstructure of the joint was characterized by the presence of the σ phase with a small amount of dissolved Nb and the α + β-Ti solid solution with Ni dissolved at the reaction interface. The maximum shear strength of 110 MPa was obtained when the connection time was 10 min. Under shear loading, the joint extends along the remaining Ti / α + β-Ti interface to break the interior of the ceramic. The results show that the pulse pressurized diffusion bonding can shorten the welding time to a certain extent. The reasonable choice of Ti / Nb interlayer can suppress the detrimental intermetallic compound formation.