Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Metal and nonmetal in final product
Patent
1992-09-18
1994-10-11
Walsh, Donald P.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Metal and nonmetal in final product
419 13, 419 14, 419 15, 419 18, 419 23, 419 38, 419 66, B22F 300
Patent
active
053545346
ABSTRACT:
The invention provides a method for manufacturing sintered parts, which uses as a debinder solvent a substance harmless to the human body and which can enhance the strength of an injection-molded product. Sintered parts suitable for use in industrial production processes and, moreover, extremely high in strength of injection-molded parts, can be produced by the steps of: mixing at least one of a sintering inorganic powders of a metal powder, a metal carbide, a carbon-nitride, a nitride powder and a ceramic powder, with an organic binder composed of an organic substance soluble in an alcohol series solvent and an organic substance insoluble in the same; injection-molding the composition obtained by the preceding process into a metal mold of a sintered part shape; immersing the injection-molded product obtained by the preceding step into an alcohol series solvent to elute and remove part of the organic binder; and heating the product to remove the residual organic binder and sintering the same, wherein the portion soluble in the alcohol series solvent of the organic binder accounts for 30 to 70% of the binder.
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Perry, Robert H. et al, Chemical Engineer's Handbook, 1973, Periodic Table of the Elements.
Kitagawa Nobuyuki
Nomura Toshio
Saito Katuyosi
Carroll Chrisman D.
Sumitomo Electric Industries Ltd.
Walsh Donald P.
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