Influence of heat treatment process on microstructure and properties of a new type antibacterial tool steel

doi:10.13251/j.issn.0254-6051.2021.07.025

Abstract

Abstract: Microstructure and mechanical properties of 50Cr15MoV antibacterial stainless steel with Cu contained were studied by using optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and Vickers hardness tester. The results show that the hardness of the tested steel increases initially and then decreases with the increase of normalizing temperature; whereas the hardness gradually decreases with the increase of tempering temperature. Besides, after aged at 500 ℃ for 30 min, Cu-rich particles precipitate out so resulting in a good antibacterial performance of the steel. The optimum heat treatments are correspondingly determined as normalizing at 1050 ℃ for 30 min and oil cooling, then tempering at 200 ℃ for 90 min and air cooling, lastly aging at 500 ℃ for 30 min then air cooling.

Key words: 50Cr15MoV tool steel with Cu contained, heat treatment process, hardness, antibacterial tool

CLC Number:

TG156

Duan Wenfeng, Shi Quanqiang, Li Jihui, Shen Zhuo, Zhang Fan, Shen Minggang, Shan Yiyin. Influence of heat treatment process on microstructure and properties of a new type antibacterial tool steel[J]. Heat Treatment of Metals, 2021, 46(7): 131-139.

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