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Optimalizace parametrů laserového přetavování povrchu
Chmelíčková, Hana ; Kaňa, J. ; Hiklová, Helena ; Lapšanská, Hana ; Havelková, Martina
Laser beam with power density 102 W.mm-2 causes metal surface melting without material vaporization. Temperature gradient between melted spot centre and solid state boundary is formed, surface structure is changed. Cooling rate affects melted zone microstructure. In result, surface quality, porosity, homogenization, mechanical and chemical resistivity are improved. Laser melting parameters optimization of steel samples was made by means of pulsed solid state laser with average power 100 W. Energy, pulse length, feed speed and laser beam diameter were subsequently changed. Melted traces on steel surface were analyzed to discover microstructure and dimensions of affected zones. Result dependence on process parameters was evaluated and optimal parameters were chosen.

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