MOLYBDENUM-BASED ALLOY (VARIANTS) Russian patent published in 2005 - IPC

FIELD: metallurgy, in particular molybdenum alloys of formula Mo-Si-B of improved oxidation resistance doped by iron, nickel, cobalt, copper or mixture thereof.

SUBSTANCE: invention relates to molybdenum-based alloy and its variants. Molybdenum alloy containing silicium and boron in disclosed, wherein said alloy comprises molybdenum with space-centered cubic lattice and intermetallic phases, as well as one from element compositions selected on the base of points on the next structural diagrams: metal alloy-Si 1.0 mass%-B 0.5 mass %; metal alloy-Si 1.0 mass %-B 4.0 mass %; metal alloy-Si 4.5 mass%-B 0.5 mass %; and metal alloy-Si 4.5 mass %-B 4.0 mass %. Said metal alloy contains molybdenum as the main component and additionally at least one element from group Fe, Ni, Co, Cu in amount of (mass %): Fe 0.01-2.0; Ni 0.01-2.0; Co 0.01-2.0; Cu 0.01-2.0. In another embodiment alloy composition is determined according to the next structural diagrams: Mo-Si 1.0 mass %-B 0.5 mass %; Mo-Si 1.0 mass %-B 4.0 mass %; Mo-Si 4.5 mass %-B 0.5 mass %; and Mo-Si 4.5 mass %-B 4.0 mass %. In additionally alloy contains 0.01-2.0 of at least one element from Fe, Ni, Co, Cu or mixture thereof. Claimed alloys have oxidation resistance at 1200⁰C or above.

EFFECT: molybdenum-based alloys with high oxidation resistance.

3 cl, 3 dwg, 1 tbl, 1 ex