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US 6,648,997 B2Granted
Quenching method
AssigneeThe BOC Group, Inc.
InventorPaul Francis Stratton
Life of this patent
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Abstract
Objects formed of engineering and tool steels are quenched from above 850° C. by immersion in an aqueous suspension of inorganic particles. The greater the proportion of particles, the slower the quench. The suspension may be saturated with carbon dioxide.
Claims5
A method of quenching a hot metal object formed of steel, comprising:
- saturating water with carbon dioxide, and immersing the hot metal object in a suspension of an essentially insoluble inorganic particulate material in the carbon dioxide saturated water, the suspension being initially at a temperature below 100° C.
Dependencies are inferred from the claim text.