Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Heat and pressure simultaneously to effect sintering
Patent
1982-03-01
1984-03-06
Hunt, Brooks H.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Heat and pressure simultaneously to effect sintering
419 54, 419 42, B22F 300
Patent
active
044353600
ABSTRACT:
A method of manufacturing metal pieces by casting and sintering of a metal alloy powder of the type that includes two phases, a conforming phase during which a load of powder is heated inside a formal casting to execute a rigid preform which is porous and a compacting and sintering phase during which the preform is heated under isostatic pressure. The method and resulting metal piece is characterized in that the conforming phase is conducted so that the preform has open pores and the isostatic pressure is applied by way of an envelope that distorts and is airtight. The method is applied advantageously in the execution of complex formal pieces made of superalloys or made of a titanium alloy.
REFERENCES:
patent: 3562371 (1971-02-01), Bush
patent: 4023966 (1977-05-01), Loersch et al.
patent: 4212669 (1980-07-01), Veek et al.
Publication "Advancements in Superalloy Powder Production and Consolidation", by Louis J. Fiedler.
Publication "Manufacture of Low Cost P/M Astrology Turbine Disks" by Dennis J. Evans.
Jeandin Michel
Trottier Jean-Pierre
A.R.M.I.N.E.S.
Hunt Brooks H.
S.N.E.C.M.A.
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