Gas nitrocarburizing of precision thin infiltration layer for aviation stainless steel 1Cr11Ni2W2MoV

doi:10.13251/j.issn.0254-6051.2023.04.042

Abstract

Abstract: Aviation stainless steel 1Cr11Ni2W2MoV was gas nitrocarburized to obtain a precision thin infiltrated layer with a depth of 0.02-0.03 mm, and the depth, hardness, brittleness and microstructure of the infiltrated layer under different process parameters were tested and analyzed. The results show that at the nitrocarburizing temperature of 480-560 ℃, by controlling the holding time, precision thin layers with depth of 0.02-0.03 mm and hardness≥800 HV0.1 can be obtained. The higher the temperature, the longer the holding time, and the greater the thickness and hardness of the infiltrated layer. Considering the process control stability and production efficiency, the infiltration rate at 520 ℃ is uniform and easy to control, which is more suitable for the actual production of the parts. The brittleness of the infiltrated layer meets the requirements of grade 1-2 in the standard HB 5022—1994, and the microstructure meets the requirements of grade 2 and above.

Key words: nitrocarburizing, martensitic stainless steel, precise infiltration layer, hardness, layer depth

CLC Number:

TG156.82

Wang Xinyu, Jiao Qingyang, Li Shijian, Wang Kexi, Yan Tingyu, Wang Yu. Gas nitrocarburizing of precision thin infiltration layer for aviation stainless steel 1Cr11Ni2W2MoV[J]. Heat Treatment of Metals, 2023, 48(4): 273-276.

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