METHOD OF PRODUCTION OF PLATES FROM SPARINGLY-ALLOY STEEL WITH HIGH COLD RESISTANCE AND WELDABILITY FOR WIDE APPLICATION, INCLUDING IN ARCTIC CONDITIONS Russian patent published in 2018 - IPC C21D8/02 C22C38/00 

FIELD: metallurgy.

SUBSTANCE: steel plate production includes the production of slabs of a given chemical composition with a thickness of not less than 3 times the final thickness of rolled products, austenization of a slab at 1200-1220°C, cooling slabs down to a temperature of 900-950°C, then rolling in a single pass with the deformation of 60-70% to final thickness, followed by cooling in a controlled cooling plant at a speed of 20-80°C/s, or cooling in the water to a temperature of the workshop; not later than in 8-12 hour plates are tempered at a temperature of 640±5°C with a holding time of 8-12 m/mm and cooled in water.

EFFECT: production of rolled steel for critical purposes in thicknesses of up to 50 mm with increased strength, plasticity, viscosity, weldability.

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