Method of carbon nitriding a metal workpiece
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United States of America Patent
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-
Mar 18, 1980
Issued Date -
N/A
app pub date -
Jan 2, 1979
filing date -
Jun 28, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an ion nitriding method, a mixture of CO or CO.sub.2 and nitrogen is compressed and then admitted into an evacuated discharge furnace. The furnace is heated to 400.degree. C. to 600.degree. C. for two hours for carbonitriding a workpiece. Depending upon the type of the workpiece, up to 30 volume percent of hydrogen is admixed with the mixture.
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