NI-BASE CORROSION-AND WEAR-RESISTANT ALLOY AND ITS PRODUCTION

摘要

PURPOSE: To produce an Ni-base corrosion- and wear-resistant alloy excellent in corrosion resistance and having high strength by specifying respective contents of W and B and also providing a structure consisting of binding phases composed essentially of Ni and dispersedly arranged hard phases of compound boride. ;CONSTITUTION: This alloy is an Ni-base alloy with corrosion resistance and wear resistance, having a composition consisting of, by weight, 25-65% W, 0-5.5% Si, B in the amount in the range where the atomic ratio of B to W is regulated to 0.5-1.5, and the balance Ni with inevitable impurities. Further, this alloy has a structure consisting of binding phases composed essentially of Ni and dispersedly arranged hard phases of double boride W₂NiB₂. This alloy can be obtained by blending powders consisting of elements, alloys, or compounds into the above composition, mixing them, compacting the resulting powder mixture, and then sintering the resulting green compact in vacuum, etc., at 1030-1250°C.;COPYRIGHT: (C)1996,JPO