STEEL SUBSTRATE WITH COATING Russian patent published in 2021 - IPC C22C38/44 C22C38/60 C22C38/54 C22C38/52 C22C38/50 C22C38/48 C22C38/46 C21D8/02 C09D1/00 C09D5/00 C08K3/04 

FIELD: steel industry.

SUBSTANCE: invention relates to a coated steel substrate used in the steel industry. The substrate (5) has the following composition, % wt.: 0.31 ≤ C ≤ 1.2, 0.1 ≤ Si ≤ 1.7, 0.15 ≤ Mn ≤ 1.1, P ≤ 0.01, S ≤ 0.1, Cr ≤ 1.0, Ni ≤ 1.0, Mo ≤ 0.1, if needed, one or several elements from: Nb ≤ 0.05, B ≤ 0.003, Ti ≤ 0.06, Cu ≤ 0, 1, Co ≤ 0.1, N ≤ 0.01 and V ≤ 0.05, wherein the rest is iron and inevitable impurities. The coating (1) contains nanographite flakes (2) with a lateral size in the range between 1 and 60 μm, well dispersed in the binder (3), forming a curved trajectory (4).

EFFECT: reduced loss of weight due to oxidation of half-finished products during the reheating stage.

22 cl, 2 dwg, 1 tbl, 1 ex