Abstract: The invention is directed to the production of non-fragile shaped members from powders comprising spheroidal metal particles.For this purpose, the invention provides a process for the production of shaped parts from powders comprising spheroidal metal particles which are mixed with from 0.2% to 2% of lubricant, comprising the combination of the following successive steps, performed in the below-indicated order:(a) mixing the powder formed by spheroidal metal particles with an amount of water-soluble cellulose gum between 0.2% and 2%, and with an amount of water which is also between 0.2% and 2%;(b) a cold compacting operation;(c) an optional oven drying operation;(d) a two-phase sintering operation, in an atmosphere which is neutral or reducing with respect to the compacted powder, the first phase being effected at a temperature of from 300.degree. to 500.degree. C. and the second phase being effected at a temperature which is substantially higher and variable with the nature of the powder.

Abstract: Method of preparation of an alloy comprising the steps of preparing a nickel-iron-chromium based alloy, placing the alloy in solution at temperatures between 925.degree.C and 1060.degree.C, followed by a quick cooling, aging the alloy at a first level of temperature and exposure time to obtain a precipitation of .gamma.' phase prior to a precipitation of a .gamma." phase and reducing the temperature to a second level of at least 700.degree.C.