DOI: https://doi.org/10.20535/2521-1943.2017.79.95851

Laser transformation hardening effect on hardening zone features and surface hardness of tool steel AISI D2

D. Lesyk, V. Dzhemelinskyi, S. Martinez, А. Lamikiz, О. Dаnylеikо, V. Hyzhevskyi

Abstract


The relationship of technological input regimes of the laser transformation hardening on change the hardening depth, hardening width, and hardening angle, as well as surface hardness of the tool steel AISI D2 using multifactor experiment with elements of the analysis of variance and regression equations was determined. The laser transformation hardening process implemented by controlling the heating temperature using Nd:YAG fiber laser with scanner, pyrometer and proportional-integral-differential controller. The linear and quadratic regression models are developed, as well as response surface to determine the effect of the heating temperature and feed rate of the treated surface on the energy density of the laser beam, hardening depths, hardening width, hardening angle, and surface hardness are designed. The main effect on the energy density of the laser beam has a velocity laser treatment, on the other hand, the main effect on the geometrical parameters of the laser hardened zone and surface hardness has temperature heating are shown. The optimum magnitudes of the heating temperature (1270 °C) and feed rate of the treated surface (90 mm/min) for laser transformation hardening of the tool steel AISI D2 using fiber laser with scanner were defined.

Keywords


laser transformation hardening; surface layer; hardened zone; hardness; tool steel AISI D2

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References


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GOST Style Citations


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