Method of producing sheet steel semi-finished products by the press-hardening method with locally modified structure in places for weldsThe method of producing sheet steel blanks (P) by the press-hardening method with locally modified structure at the locations for welds is that the steel semi-product (P) is heated to a temperature at which the ferritic-peritic structure is fully transformed into austenite, then the semi-product (P) is cooled locally in the spots to be welded to a temperature close to Mf steel, followed by reheating by heat conduction from the environment and, consequently, annealing of the haze structure. Thereafter, the semi-product is transformed into a spatial extract in the tool, which is also turbid in the tool, and the sheet semi-product (P) is removed from the tool when the desired temperature is reached.

摘要

The method of producing sheet steel blanks (P) by the press-hardening method with locally modified structure at the locations for welds is that the steel semi-product (P) is heated to a temperature at which the ferritic-peritic structure is fully transformed into austenite, then the semi-product (P) is cooled locally in the spots to be welded to a temperature close to Mf steel, followed by reheating by heat conduction from the environment and, consequently, annealing of the haze structure. Thereafter, the semi-product is transformed into a spatial extract in the tool, which is also turbid in the tool, and the sheet semi-product (P) is removed from the tool when the desired temperature is reached.