FIELD: process engineering.
SUBSTANCE: invention relates to steel surface processing. Steel surface is cleaned of scale and processed by laser beam. Surface laser processing is executed by pulse laser radiation with wavelength of 0.8-1.2 mcm, power of 105-107 W/cm2, pulse frequency of 28-35 kHz and surface scanning rate of 8-12 cm/s. To form iron oxide layer on steel surface to preserve composition and properties of deeper metal plies, laser processing is performed to depth of 10-40 nm.
EFFECT: higher rust resistance.
2 cl, 1 tbl
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