Open AccessNumerical Simulation and Microstructure and Properties of 45 Steel by Scanning Electron Beam Bevel Polishing
Author(s) -
Tenghui Xia,
Cuiwei Du,
Yong Li,
Jian Lü,
Zhifa Zhu
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2133/1/012032
Subject(s) - polishing , materials science , microstructure , martensite , acicular , austenite , indentation hardness , metallurgy , composite material , scanning electron microscope , bevel gear , cathode ray , hardness , surface layer , layer (electronics) , electron , mechanical engineering , physics , quantum mechanics , engineering
In order to obtain metal products with good surface quality, it is necessary to develop an efficient bevel polishing method. Therefore, this article Uses continuous scanning electron beam polishing. The surface of the material undergoes rapid melting and solidification and generates a dynamic temperature field. The polishing treatment improves the microstructure of the surface layer of the quenched and tempered 45 steel, and significantly increases the microhardness of the surface layer. The hardness after treatment can reach up to 747.6Hv, which is about 2.4 times higher than the matrix; the structure after hardening is transformed from the mixed phase of coarse acicular martensite and lath martensite to hidden acicular martensite and retained austenite a mixed phase thereof. In addition, after bevels with different inclination angles are subjected to electron beam surface polishing modification treatments with different scanning speeds, under the same parameters, as the inclination angle increases, the hardness value at the same position decreases.