FIELD: process engineering.
SUBSTANCE: invention relates to metallurgy. Proposed method comprises the following stages: hot- or cold-rolling of steel sheet including steel backing and pre-applied coating of aluminium-silicon alloy. Cutting said steel sheet in billet with said coating, heating it in protection-free atmosphere to Ti making from Tc-10°C to Tc where Tc is the said coating eutectic or solidus temperature. Heating the billet from Ti to Tm in protection-free atmosphere at heating rate V where V is rate of heating from Ti to Tt for obtaining heat billet with coating. Holding heated billet with coating at said Tt for time tm. Then billet is hot-formed to produce the part with coating and cooled down to produce microstructure in said steel backing including at least, one component selected form martensite and bainite.
EFFECT: high mechanical strength, higher resistance to lamination and corrosion.
21 cl, 6 dwg
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