ALLOY BASED ON FeCrAl FOR NUCLEAR REACTORS WITH LEAD COOLANT Russian patent published in 2022 - IPC C22C38/26 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, namely to an iron-chromium-aluminum alloy with high corrosion resistance, used as a structural material in the nuclear power industry for the manufacture of vessels and in-reactor equipment of nuclear reactors with lead coolant. The alloy contains components in the following ratio, wt.%: carbon 0.008-0.04, silicon 2.20-2.80, manganese 0.15-0.40, chromium 9.00-11.50, aluminum 4.50- 7.50, niobium 0.40-0.60, molybdenum 1.80-2.20, nitrogen 0.008-0.010, cerium 0.005-0.020, yttrium 0.005-0.020, calcium 0.005-0.020, gadolinium 0.008-0.015, beryllium 0, 02-0.050, zirconium carbonitride 0.01-0.020, iron and impurities - the rest. The sum of the contents of chromium, aluminum and silicon is 15.8-21.5 wt.%, and the particles of zirconium carbonitride have a size of 30-65 nm. As impurities, the alloy contains, wt.%: sulfur ≤0.010, phosphorus ≤0.015, oxygen ≤0.005, cobalt up to 0.01 and copper ≤0.05.

EFFECT: increased service life of alloy products due to the presence of a stable passive oxide film, which leads to corrosion suppression.

3 cl, 1 tbl