C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
204/96.36
C21D 1/38 (2006.01) C23C 8/22 (2006.01) C23C 8/38 (2006.01) C23C 16/50 (2006.01)
Patent
CA 1338284
A control process for carburizing the case of a ferrous workpiece by means of the ion "glow discharge" technique is disclosed. Uncontrolled arcing is prevented during gas changeover after sputter cleaning the workpiece by reducing the power of the DC pulsed current while introducing a substantially pure, carbon bearing gas into the work chamber and, prior to changeover completion, increasing the power to a predetermined watt density. Optimum processing time and case uniformity is achieved by setting the watt density power at a predetermined value correlated to the carburizing temperature and setting the carbon bearing gas flow rate at a constant mass flow rate correlated to case carbon uniformity so that only the temperature of the workpiece is controlled during carburizing. The control arrangement is applicable to any ion glow discharge technique where a highly, electrically conductive gas is to be disassociated for coating the surface of a workpiece.
556305
Tackett Garrol
Verhoff Stephen H.
Gowling Lafleur Henderson Llp
Surface Combustion Inc.
LandOfFree
Ion carburizing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ion carburizing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ion carburizing will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1325337