METHOD OF MAKING COBALT-BASED ALLOY FOR CERMET AND CLASP DENTAL PROSTHESIS Russian patent published in 2014 - IPC C22C1/02 C22C19/07 

FIELD: metallurgy.

SUBSTANCE: proposed method comprises smelting in vacuum-induction furnace and casting in vacuum of bars in split moulds of square or round profile with square side of diameter not over 12 mm, respectively. Cast alloy contains following substances, in wt %: carbon - 0.03-0.30, silicon - 0.7-2.5, manganese - 0.25-1.0, chromium - 27.5-30.5, molybdenum - 3.5-6.0, nickel - not over 0.5, iron - not over 0.3, boron - 0.03-0.10, cobalt and unavoidable impurities making the rest, [%Si]/[%C] ratio of said alloy is ≥4.0. Alloy features lower hardness, better machinability at appropriate mechanical, carrion and casting properties.

EFFECT: lower labour input.

2 tbl, 1 ex