Prof. A. T. Kozakov Profile

Prof. A. T. Kozakov

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Proceedings Article | 2 November 2023 Paper

Tribological characteristics of the multicomponent iron-based alloys surface after laser modification

S. Yaresko, A. Kozakov, G. Guseva, V. Sherbakov, A. Sidashov

Proceedings Volume 12920, 129200J (2023) https://doi.org/10.1117/12.2691199

KEYWORDS: Laser therapeutics

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The microstructure and tribological characteristics of the surface of structural steels E3310 and A290C1M and chrome vanadium cast iron after laser treatment (LT) are studied. For steel E3310 after LT (P=100 W) the structure of lath martensite and upper bainite is formed. For A290C1M steel (P=100 W, V=2 mm/s) the upper layer in the hardening zone is remelted, has the highest microhardness and martensite structure, below there is a martensitic-bainitic microstructure. The maximum depth of hardening at E3310 steel is 310 microns, for A290C1M steel is 170 microns. Microhardness for steels increases by more than 2.0 times. At the LT of cast iron with a slight melting of the surface, this increase is more than 4.0 times. In the melting zone the main structure is martensite, and in the quenching zone the ledeburite structure prevails. The hardening depth is 220-310 microns; the maximum microhardness value is 820 HV_0.1. No significant changes in the structure of cast iron were detected at the LT without melting. As a result of sliding friction tests, it was found that the decrease in linear wear and the wear intensity after LT is 26.6% and 43.9% for steels E3310 and A290C1M, respectively. For cast iron, the wear intensity after LT with melting is reduced by more than 100 times, linear wear – by more than 50 times, and the coefficient of friction – by almost 30 %.

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