High-cobalt-base alloy material part nitriding method

The invention discloses a high-cobalt-base alloy material part nitriding method. A high-cobalt-base alloy material 1Cr16Co5Ni2Mo1WVNbN is subject to quenching, oil cooling, tempering and air cooling to prepare a sample, the sample is processed, and the outer surface of the sample is subject to grit blasting treatment; the prepared sample is subject to heat preservation nitriding treatment under the nitrogen containing atmosphere such as pure nitrogen or pure ammonia; and finally the sample obtained after nitriding treatment is subject to diffusion and heat preservation treatment under argon shielding, and a nitrided layer texture is obtained through preparation. According to the high-cobalt-base alloy material part nitriding method, the high-cobalt-base alloy material is prepared into thesample, the sample is subject to heat preservation nitriding treatment under the nitrogen containing atmosphere such as pure nitrogen or pure ammonia after surface treatment is carried out, the nitriding speed is high, a nitr