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US 5,970,307 AGranted
Sintering method for tungsten-nickel-manganese type heavy alloy
AssigneeAgency for Defense Development
InventorsMoon Hee Hong, Woon Hyung Baek, Joon Woong Noh, Heung Sub Song, Seong Lee, Eun Pyo Kim
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Abstract
A sintering method for a W--Ni--Mn type heavy alloy, including controlling the deoxidization of tungsten and nickel under an inert atmosphere, changing to a hydrogen atmosphere at above a temperature at which manganese is deoxidized and simultaneously deoxidizing tungsten, nickel and manganese, and sintering by raising the temperature, resulting in the fabrication of a sintered heavy alloy having a 100% relative theoretical density.
Claims4
A sintering method for a tungsten-nickel-manganese type heavy alloy, comprising:
- heating a compacted mixture of powders of W,Ni and Mn at 1050.about.1240.degree. C. under an inert atmosphere for controlling the deoxidzation of tungsten and nickel;
- changing the inert atmosphere to a hydrogen atmosphere at above a temperature at which manganese is deoxidized and simultaneously deoxidizing tungsten, nickel and manganese;
- and
- performing a liquid phase sintering on the thusly deoxidized material.
1 more element
Dependencies are inferred from the claim text.