Stainless austenitic (0.12C-18Cr-10Ni-Ti, wt-%) and ferritic-martensitic (0.16C-12Cr-Mo-Si-V-Nb-B, wt-%) steels were joined by transient liquid phase diffusion bonding (also called diffusion brazing) with the filler metals based on Ni-Cr-Si-(Fe)-B at 1160 °C for different bonding times from 15 to 40 min. It is shown that the braze joints have a heterogeneous diffusion zone with a boride network which is formed during isothermal solidification. The influence of the filler metals composition on the joint microstructure and tensile strength was studied. It is established that the initial concentration of boron and chromium in the filler metal plays an important role in the formation of the microstructure. It is shown that the use of the filler metal with the optimized composition of Ni-20Cr-7.5Si-4.5Fe-1.5B makes it possible to obtain the most homogeneous structure, leading to the best tensile strength of the joint of about 500 ± 40 MPa.

奥氏体不锈钢（0.12C-18Cr-10Ni-Ti，wt％）和铁素体马氏体（0.16C-12Cr-Mo-Si-V-Nb-B，wt％）钢通过瞬时液相扩散结合（也称为扩散钎焊），并在1160°C下使用基于Ni-Cr-Si-（Fe）-B的填充金属在15至40分钟之间进行不同的键合时间。结果表明，钎焊接头具有不均匀的扩散区，该扩散区具有在等温凝固过程中形成的硼化物网络。研究了填充金属成分对接头组织和抗拉强度的影响。已经确定，填充金属中硼和铬的初始浓度在微结构的形成中起重要作用。结果表明，使用具有优化成分的Ni-20Cr-7.5Si-4.5Fe-1的填充金属。