Open AccessStructure of the surface layer and the microhardness of high-carbon instrumental steel after laser treatment
Author(s) -
N. A. Astafyeva,
S. K. Kargapoltsev,
V. E. Gozbenko,
Yu I. Karlina,
M. G. Shtayger,
A. I. Karlina
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1111/1/012004
Subject(s) - indentation hardness , materials science , carbon steel , thermal treatment , tempering , metallurgy , laser , laser treatment , surface layer , carbon fibers , layer (electronics) , thermal , composite material , microstructure , corrosion , optics , composite number , physics , meteorology
The article presents the results of the study of the effect of laser treatment on the structure and microhardness of the surface of high-carbon steel samples. The treatment is carried out in order to obtain surface layers, parts with high properties for industries of various purposes. The samples from high-carbon steel U10 A after preliminary thermal treatment by modes of 780–800 °C heating for 2 minutes with cooling in 10 percent water solution of sodium chloride with tempering at 270–320 °C and cooled in the air and without the thermal treatment are treated with the Nd:YAG laser with the capacity up to 1 kW. Metallographic studies and microhardness properties illustrate the influence of laser surface processing on the increase in mechanical properties. It is shown that the laser thermal treatment of steel allows obtaining a surface microhardness of about HV 800-1000 MPa and depends on the original state of the metal and the previous thermal treatment.