Method of cryogenic treatment of tungsten carbide containing cobalt
OwnerJohn Russell McKayinventor
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Abstract
A method of cryogenic treatment of tungsten carbide containing cobalt. A first step involves pre-treating tungsten carbide with microwave sintering, thereby changing the properties of the tungsten carbide. A second step involves lowering the temperature of the microwave sintered tungsten carbide gradually to cryogenic levels. A third step involves raising the temperature of the microwave sintered tungsten carbide gradually back to ambient temperatures. The described combination of microwave sintering and cryogenic treatment produces significant improvement in impact resistance, erosion and corrosion resistance and wear rate.
Claims2
A method of cryogenic treatment of tungsten carbide containing cobalt, comprising the steps of:
- pre-treating tungsten carbide containing cobalt with microwave sintering, thereby changing the properties of the tungsten carbide;
- lowering the temperature of the microwave sintered tungsten carbide gradually to cryogenic levels;
- and
- raising the temperature of the microwave sintered tungsten carbide gradually back to ambient temperatures.
Dependencies are inferred from the claim text.