FIELD: metallurgy.
SUBSTANCE: by means of local remelting, mechanical and chemical treatment, the blank of required dimensions is prepared in the range (the length×radius×thickness) from 100×10×2 mm up to 1000×1000×12 from pearlite, bainite or martensite hardening steels of 30XHCA, 35XHCA grades and etc. The blank is fixed in a rotator. The blank local area is remelted along the perimeter or along the blank over the entire wall thickness. The remelting modes are set depending on desired depth of the layer to be strengthened, the thickness of the blank and desired microstructure. The main parameters of the local remelting modes are the linear or angular velocity of the remelting and the power of the laser radiation. The processing is carried out with laser beam movement rate at of 15-40 mm/s, the laser beam power is 1-15 kW. After local remelting, time is maintained for natural cooling of the blank or forced cooling by water or air flow is used.
EFFECT: increased strength and rigidity of the blank.
5 cl, 2 dwg
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