Patent ID: 8235767
Filing Date: 2012-08-07
Classification: C21D,Y10T

Abstract:
1. A process to treat an abrasive tool using a cycling chamber, the process comprising: (a) introducing an abrasive tool into a cycling chamber, wherein the tool has a temperature of about ambient temperature; (b) introducing at least one cryogenic material into the cycling chamber, wherein the internal temperature of the cycling chamber or abrasive tool can be controlled by adjusting the flow rate of the at least one cryogenic material; (c) decreasing the temperature of the cycling chamber or abrasive tool to a range from about −80 degrees Fahrenheit (F). to about −100 degrees F. at a rate of about −0.5 degrees F. per minute to about −10 degrees F. per minute; (d) further decreasing the temperature of the cycling chamber or abrasive tool to a range from about −275 degrees F. to about −325 degrees F. at a rate of about −0.05 degrees F. per minute to about −0.20 degrees F. per minute; (e) increasing the temperature of the cycling chamber or abrasive tool to a range from about −80 degrees F. to about −100 degrees F. at a rate of about 0.05 degrees F. per minute to about 0.20 degrees F. per minute; and (f) further increasing the temperature of the cycling chamber or abrasive tool to about ambient temperature at a rate of about 0.5 degrees F. to about 10 degrees F., and resulting in a strengthened and toughened abrasive tool.