HOT CUTTING TREATMENT METHOD WITH GRINDING SURFACE LAYER GRAINS AND PRODUCT OBTAINED BY HOT CUTTING TREATMENT WITH CHANGING SURFACE LAYER GRAINS Russian patent published in 2017 - IPC B21D28/24 C21D9/46 C21D8/00 C22C38/00 

FIELD: physics.

SUBSTANCE: method includes the steps of: heating and holding the steel sheet in the temperature range of Ac₃ up to 1400°C to obtain the austenitic structure of the steel sheet, then the cutting treatment of the steel sheet is carried out, when placing the steel sheet on the matrix, and the treated steel sheet is quenched by rapid cooling, the initial cutting temperature being controlled in the range of Ar₃+30C° to Ar₃+140°C.

EFFECT: preventing the delayed fracture on the surface of the sheet cut and obtaining a dimensional accuracy in the manufacture of the article from the sheet, a hot cutting treatment with grinding the surface layer grains.

17 cl, 9 dwg, 3 tbl