COMPOSITE ALLOY AND METHOD OF ITS MANUFACTURE Russian patent published in 2024 - IPC C22C1/10 C22C37/10 C21B11/10 C22C33/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to the production of a composite alloy based on iron with uniformly distributed titanium carbide nanoparticles. Can be used in foundries to produce alloy castings with improved mechanical and service properties. The iron-based composite alloy with uniformly distributed titanium carbide nanoparticles contains, wt.%: iron 80-89; nickel 3-5; chromium 2-3; titanium 1-5; aluminium 0.3-0.8; carbon no less than 4. The alloy is produced by direct electroslag reduction starting with solid CaF₂ slag_. The initial oxides containing iron oxide, titanium oxide, nickel oxide and chromium oxide are mixed in the solid phase, then metallic aluminium is added based on the calculation of the stoichiometry of the reduction of titanium oxide and 5-7% in excess of the stoichiometry, and carbon in the form of coke or charcoal from calculating the stoichiometry of the reduction of iron oxide and 50-60% above the stoichiometry, obtaining a mixture with a moisture content of less than 2%. After obtaining the liquid state of the slag, the prepared mixture is poured into the crucible of an electroslag plant in portions constituting 0.05 parts of the total weight at an interval determined by the complete restoration of the previous portion. The melting process is carried out at a voltage of 32 V and 3300-3700 A.

EFFECT: uniform distribution of titanium carbide nanoparticles of a given quantity, size and chemical composition, high wear resistance and hardness.

2 cl, 1 tbl, 1 ex