| 摘要 |
The invention relates to the iron and steel industry, in particular to rolling and can be used for producing a thin zinc-iron coated steel strip for car production, household appliances and for building engineering. The inventive method consists in carrying out a cold rolling, chemical cleaning, pre-heating, recrystallisation annealing in a through furnace, cooling, hot galvanisation, cooling and a temper rolling, wherein the termodiffusion recrystallisation annealing of the strip at a temperature of 600-720 °C in a hydrogen atmosphere during a time for reducing a carbon content to a value less than 0.002 % is carried out prior to the temper rolling, a zinc-iron coating with the iron content ranging from 40 to 60 % is formed and a zinc diffusion in the depth of 8-35 mkm of a steel base associated with the formation of a zinc ferrite in the subsurface layer thereof is produced. The inventive method makes it possible to reduce by 20-30 % the production costs of a zinc-iron coated steel strip in comparison with a IF Fe-Zn-coated steel, to increase the adhesive strength of the zinc-iron coating to a base, wear resistance, weldability, colorability, corrosion resistance and to prevent such coating defects as powdering and cratering.
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