TOOL STEEL FOR HOT PROCESSING Russian patent published in 2020 - IPC C22C38/24 C22C38/26 C22C38/28 C22C38/30 C22C38/32 C22C38/46 C22C38/48 C22C38/50 C22C38/52 C22C38/54 C22C33/02 

FIELD: metallurgy.

SUBSTANCE: invention relates to tool steel for hot processing. Steel contains, wt %: C 0.27–0.38; Si 0.10–0.35; Mn 0.2–0.7; Cr 4.5–5.5; Mo 2.05–2.90; V 0.4–0.6; N 0.01–0.12; H ≤ 0.0004; S ≤ 0.0015; balance is iron and impurities. If necessary, steel may contain at least one element of the following, wt %: Al 0.001–0.06; Ni ≤ 1.5; Cu ≤ 2; Co ≤ 8; W ≤ 0.5; Nb ≤ 0.5; Ti ≤ 0.05; Zr ≤ 0.05; Ta ≤ 0.05; B ≤ 0.01; Ca 0.00005–0.009; Mg ≤ 0.01, and REM ≤ 0.2. Steel contains 0.2–3 vol % primary released carbonitrides of MX type.

EFFECT: longer service life of tool made from steel.

8 cl, 1 tbl, 3 ex