Net shaped dies and molds and method for producing the same
AssigneeDynamet, Inc.
InventorsClifford M. Bugle, Carl A. Lombard
Life of this patent
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Abstract
A method for making dies or molds from powdered metals is disclosed. The method includes the steps of: providing a pattern of a desired shape to define the mold or die cavity configuration; providing a canister; placing the pattern in the canister and filling the canister with a selected powdered metal; hot isostatic pressing the canister and powdered metal to produce a consolidated and densified compact; and sectioning the compact along a plane to enable removal of the pattern and thus providing the desired die or mold cavity in the fully densified powdered metal die or mold set so formed.
Claims13
A method of making dies and molds comprising the steps of:
- providing a pattern having a desired shape to define one of a die or mold cavity;
- providing a canister having a hollow interior;
- placing the pattern in the hollow interior of the canister;
- filling the canister with a powdered metal to surround the pattern therein;
- hot isostatic pressing the canister to consolidate and densify the powdered metal;
- and
- sectioning the consolidated and densified powdered metal to permit removal of the pattern whereby one of a die or mold cavity is provided.
A method of making dies and molds comprising the steps of:
- providing a pattern of a desired shape to define one of a die or mold cavity;
- providing a canister having a hollow interior;
- placing the pattern in the hollow interior of the canister and affixing the pattern to the canister;
- coating the pattern with a layer of yttrium oxide;
- filling the canister with a powdered M4 tool steel to fill the space between the pattern and the internal surfaces of the canister;
- evacuating air from the canister;
- sealing the evacuated canister by welding;
- consolidating and densifying the M4 tool steel powder by hot isostatic pressing the canister and contained powder at a pressure of 15,000 PSI and at a temperature of 2175.degree. F. for a time of five hours;
- and
- sectioning the consolidated and densified powdered metal and removing the pattern therefrom to provide one of a die or mold cavity.
A die or mold comprising a die set made by hot isostatic pressing powdered metal and having a die cavity of a desired configuration formed therein during said hot isostatic pressing operation.
Dependencies are inferred from the claim text.