Microscopic Images and Microstructure of High-Speed Steel Surface after Gas-Laser Cutting.

Autor: Afanasieva, L. E., Izmailov, V. V., Novoselova, M. V.
Zdroj: Journal of Surface Investigation: X-Ray, Synchrotron & Neutron Techniques; May2021, Vol. 15 Issue 3, p471-477, 7p
Abstrakt: The results of experimental studies of the surface roughness and the microstructure of high-speed steel R6M5 after gas-laser cutting are presented. It is shown that the parameters the surface roughness obtained in the case of the studied samples correspond to typical values of the surface-roughness parameters after such types of machining as turning or grinding operations. In the course of gas-laser cutting, a quenching zone up to 110 μm in depth with an increased microhardness amounting to 10 600 ± 160 MPa is formed in the surface layer. Short-term tempering in the temperature range of Ac1–620°С does not lead to decomposition of the martensite; neither a transition zone nor tempering zone are revealed. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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