Energy Balance in High-Quality Cutting of Steel by Fiber and СО2 Lasers
V. M. Fomin, A. A. Golyshev, A. M. Orishich, V. B. Shulyat'ev
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Keywords: лазерная резка, СО-лазер, волоконный лазер, безразмерные параметры, энергетический баланс, laser cutting, СО laser, fiber laser, dimensionless parameters, energy balance
Abstract
The energy balance of laser cutting of low-carbon and stainless steel sheets with the minimum roughness of the cut surface is experimentally studied. Experimental data obtained in wide ranges of cutting parameters are generalized with the use of dimensionless parameters (Peclet number and absorbed laser energy). It is discovered for the first time that the minimum roughness is ensured at a certain value of energy per unit volume of the melt (approximately 26 J/mm3), regardless of the gas type (oxygen or nitrogen) and laser type (fiber laser with a wavelength of 1.07 mm or СО2 laser with a wavelength of 10.6 mm).
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