MARTENSITE-AGING STEEL Russian patent published in 2020 - IPC C22C38/50 C22C38/60 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to corrosion-resistant martensite-aging steels, intended for production of high-loaded parts. Steel is melted in open induction furnace (OIF) with subsequent electroslag remelting (ESR) or vacuum-arc remelting (VAR) and contains components at following ratio, wt. %: carbon to 0.04, silicon to 0.30, manganese to 0.20, chromium 12.0–14.0, nickel 7.5–9.0, molybdenum 0.6–1.0, aluminium 0.3–0.6, titanium 0.3–0.6, vanadium 0.01–0.20, tungsten 0.01–0.20, cerium up to 0.05, magnesium - up to 0.05, the rest - iron and unavoidable impurities, including sulphur - up to 0.025, phosphorus - up to 0.025, copper - up to 0.20, tin - up to 0.001, antimony up to 0.001, arsenic - up to 0.001, lead - up to 0.001, bismuth - up to 0.001.

EFFECT: steel has high strength and corrosion resistance.

2 cl