Numerical simulation of surface laser quenching and microstructure and properties of 420B stainless steel dental chisel

doi:10.13251/j.issn.0254-6051.2021.04.026

Abstract

Abstract: In order to improve the hardness of cutting edge of the dental chisel and prolong service life, laser quenching test on 420B stainless steel dental chisel was carried out based on the numerical simulation by using ANSYS parameterized design, and the microstructure and hardness were analyzed by means of OM and hardness test. The results show that when the laser power is 500 W and the scanning speed is 960 mm/min, the simulation model shows that the maximum temperature of the quenched surface is about 1070 ℃. Under this process parameter, the highest hardness of the cutting edge in cross section after quenching is 57.1 HRC, and the average hardness is 51.0 HRC, and the quenching effect is preferable.

Key words: 420B stainless steel, numerical simulation, laser quenching, hardness, microstructure

CLC Number:

TG161

Guo Shirui, Zhang Shihao, Che Jiangning, Cui Lujun, Zheng Bo. Numerical simulation of surface laser quenching and microstructure and properties of 420B stainless steel dental chisel[J]. Heat Treatment of Metals, 2021, 46(4): 147-151.

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