Effect of Pre - Oxidation on the Quality of Nitride Layer of 1Cr11Ni2W2MoV Stainless Steel

SHI Guo - mei, LIU Yong, WANG Rui, XUE Yi - ran

doi:10.16577/j.issn.1001-1560.2022.0133

Materials Protection >

2022 , Vol. 55 >Issue 5: 113 - 116

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0133

Effect of Pre - Oxidation on the Quality of Nitride Layer of 1Cr11Ni2W2MoV Stainless Steel

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Shenyang Liming Aero - engine Group Corporation Ltd., AECC, Shenyang 110043, China

Received date: 2021-12-25

Revised date: 2022-02-14

Accepted date: 2022-03-10

Online published: 2024-01-09

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Abstract

In order to study the effect of pre - oxidation treatment on the quality of the nitriding layer of stainless steel parts, quenched and tempered samples were treated with different pre - oxidation and sand blowing treatments before nitriding. The color of the preoxidized film was observed visually. The microstructure, depth, hardness, and brittleness of nitriding layer were measured by metallographic microscope and hardness tester. Results showed that the passivation film on the surface of 1Cr11Ni2W2MoV stainless steel could be destroyed if the steel was preoxidized at 550 ℃ for 5～20 min before nitriding. So the hardness, depth and structure of the nitriding layer could meet the technical requirements for nitriding if treated so. Furthermore, the uniformity and nitriding speed of the layer were better than that of the layer with only sand blowing treatment before nitriding.

Key words： nitriding; pre - oxidation treatment; passivation film of stainless steel; surface activation

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SHI Guo - mei, LIU Yong, WANG Rui, XUE Yi - ran . Effect of Pre - Oxidation on the Quality of Nitride Layer of 1Cr11Ni2W2MoV Stainless Steel[J]. Materials Protection, 2022 , 55(5) : 113 -116 . DOI: 10.16577/j.issn.1001-1560.2022.0133

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