ALUMINIUM-BASED ALLOY Russian patent published in 2019 - IPC C22C21/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, in particular to aluminum base alloy, and can be used to produce products, including welded structures, working in corrosive environments under high loads, including at elevated and cryogenic temperatures. Aluminum alloy comprise, wt. %: zirconium – from 0.10 to 0.50, iron – from 0.10 to 0.30, manganese – from 0.40 to 1.5, chromium – from 0.15 to 0.6, scandium – from 0.09 to 0.25, titanium – from 0.02 to 0.10, at least one element selected from the group: silicon – from 0.10 to 0.50, cerium – from 0.10 to 5.0, calcium – from 0.10 to 2.0, optionally magnesium – from 2.0 to 5.2, aluminum and inevitable impurities – balance, wherein the alloy structure is an aluminum matrix comprising silicon and optionally magnesium, secondary precipitates of the Al₃(Zr, X) phases with an L1₂ type grid and with a size of not more than 20 nm, wherein X-Ti and/or Sc, secondary precipitates of Al₆Mn and Al₇Cr, and eutectic phases comprising iron and at least one element from the group containing calcium and cerium, with an average particle size of not more than 1 mcm, at the following ratio of phases, wt. %: secondary precipitates of Al₃(Zr, Sc) – 0.5 to 1.0, secondary precipitates of Al₆Mn and Al₇Cr – 2.0–3.0, eutectic phases, comprising iron and at least one element from the group containing calcium and silicon – 0.5–6.0, the aluminum matrix – balance.

EFFECT: invention is aimed at to the production of an alloy with a high level of physical and mechanical characteristics, processability and corrosion resistance.

3 cl, 3 ex, 2 dwg, 5 tbl