Microstructure and properties of boronized layer on AISI 410 steel by paste boronizing

doi:10.13251/j.issn.0254-6051.2022.04.042

Abstract

Abstract: Surface of AISI 410 steel was strengthened by the process of paste boronizing, and the microstructure of boronized layer was analyzed. The hardness, wear resistance and corrosion resistance of the AISI 410 steel were tested. The results show that the boronized layer is mainly composed of FeB and Fe₂B phases, and the bonding interface between the boronized layer and matrix is flat. The microhardness of the outer zone of the boronized layer is higher than 1400 HV0.5, and the hardness of the inner zone is higher than 1100 HV0.5. After boronizing, the surface friction coefficient and worn area of the specimens are significantly reduced, and the wear resistance is improved. In the electrochemical corrosion test, the self-corrosive potential of the boronized specimen is higher than that of the base metal, the self-corrosive current density is lower than that of the base metal,indicating that boronized specimens are more resistant to corrosion, and the surface corrosion resistance is improved.

Key words: AISI 410 steel, paste boronizing, wear resistance, electrochemical test

CLC Number:

TG156.8⁺7

Shi Mingxiao, Wang Xiongdong, Li Jingyong, Yang Zhidong, Mao Weidong, Ni Huifeng. Microstructure and properties of boronized layer on AISI 410 steel by paste boronizing[J]. Heat Treatment of Metals, 2022, 47(4): 245-250.

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