摘要
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。
Impulse pressuring diffusion bonding （IPDB） of TiC cermet to stainless steel 06Cr19Ni10 using Ti-Nb interlayer was carried out in an attempt to reduce the bonding time and to alleviate the detrimental effect of interfacial reaction products on bonding strength. Successful bonding is achieved at 890℃ under a pulsed pressure of 2-10 MPa within a duration of only 4-12 rain, which is notably shortened in comparison with conventional diffusion bonding. Microstructure characterization reveals the existence of a phase with a limit solubility of Nb, （fl-Ti, Nb） phase, and solid solution of Ni in α＋β-Ti in the reaction zone. Maximum shear strength of 110 MPa is obtained when the joint is bonded for 10 rain, indicating a robust metallurgical bonding is achieved. Upon shear loading, the joints fracture along the remnant Ti/α＋β-Ti interface and extend to the interior of TiC cermet in a brittle cleavage manner. This technique provides a highly promising bonding method of TiC cermet and steel.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第4期882-887,共6页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(51205428)
Sharing Fund of Chongqing University’s Large-scale Equipment(2013063011)
