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US 3,953,194 AGranted
Process for reclaiming cemented metal carbide
AssigneeAllegheny Ludlum Industries, Inc.
InventorsAlbert G. Hartline, III, John A. Campbell, Theodore T. Magel
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Abstract
There is disclosed a process for reclaiming cemented metal carbide material by first subjecting the metal carbide material to catastrophic oxidation to produce a mixture of metal oxide and the oxide of the cement, reducing the metal oxide either mixed with the cement oxide or after being separated from it, and finally carburizing the reduced metal.
Claims19
A process for reclaiming cemented metal carbide comprising
- A. oxidizing said cemented metal carbide by subjecting it to oxygen at a temperature of at least 1100.degree.F for a time sufficient to convert metal carbide to metal oxide,
- B. subdividing the metal oxide to a powder,
- C. reducing the metal oxide powder by subjecting it to a reducing gas at a temperature and for a time to reduce the oxygen content of the powder to a maximum of 0.5% by weight, and
- D carburizing the reduced powder by subjecting it to available carbon at a temperature and for a time to convert said metal to metal carbide.
1 more element
Dependencies are inferred from the claim text.