FERRITE ALLOY Russian patent published in 2019 - IPC C22C38/32 C22C38/28 C22C38/26 C22C38/24 C22C38/22 C22C38/18 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to ferrite alloys used as structural material in system of lead-cooled fast neutron reactor in temperature range of 300–800 °C. Alloy contains, wt. %: C 0.01–0.1; N 0.001–0.1; O ≤0.2; B ≤0.01; Cr 9–11.5; Al 2.5–8; Si <0.5; Mn <0.4; Y <2.2; Sc + Ce + La ≤0.2; Mo + W ≤4.0; Ti <1.7; Zr <3.3; Nb <3.3; V <1.8; Hf + Ta + Th <6.5; the balance is Fe and unavoidable impurities. Amounts of Ti, Zr, Nb, V, Hf, Ta, Th, C, N and O are balanced so that the following ratio is met, at. %: 1.2≤ (Ti + Zr + Nb + V + Hf + Ta + Th-x⋅O-N) / C≤2.3, where x is 0.5, unless the Y content is greater than or equal to 0.01 wt. %, then x is 0.67.

EFFECT: alloys have high resistance to oxidation.

14 cl, 5 dwg, 1 tbl