FIELD: metallurgy.
SUBSTANCE: invention relates to metallurgy field, particularly to receiving of multiphase steels, allowing required complex physicochemical properties. It is heated alloy, containing iron and in the capacity of alloying elements from about 0.03 wt % up to about 0.35 wt % of carbon, from about 1.0 wt % up to about 11.0 wt % of chrome, up to about 2.5 wt % of manganese, and allowing initial temperature of martensite formation from about 330°C, up to temperature, enough for formation of initial microstructure, containing, austenitic phase, in essence, not consisting martensite. It is cooled initial microstructure at rate, providing its transformation into intermediate microstructure, containing adjoining austenitic and ferritic phases and carbide extraction, distributed in volume of ferritic phase and, in essence, absent at phases boundary. It is cooled initial microstructure at a rate, providing its transformation into final microstructure, containing martensite-austenitic areas, consisting of plates of martensite, alternating with thin films of austenite, area of ferrite, adjoining to martensite-austenitic areas, and carbide extractions, distributed in areas of ferrite and, in essence, absent at phases boundary between plates of martensite and thin films of austenite or at phases boundary between areas of ferrite and martensite-austenitic areas.
EFFECT: providing of high durability, viscosity, corrosion stability and malleability of steel.
16 cl, 6 dwg, 2 ex
