PROCEDE DE REALISATION D'UNE PIECE EN ALLIAGE RESISTANT A DES TEMPERATURES TRES ELEVEES PAR METALLURGIE DES POUDRES

摘要

A method for powder metallurgical production of a high temperature alloy body consists of mixing powdered alloy components or pre-alloys in the desired proportions; cold working the mix under a protective atmosphere; canning the cold-worked powder mixture; compressing the canned powder by extrusion or hot isostatic pressing to a form of dense blank; cutting said blank into slices; forging them at a constant temperature within the range of from 0.6 to 0.75 of the melting point at a strain rate of from 10-3 to 100 S-1; and thereafter subjecting the forged body to a coarse-grain annealing between 1230 DEG and 1300 DEG C for up to 3 hours.