Low pressure carbonitriding method and device
AssigneeECM Technologies
InventorsJean Berlier, Aymeric Goldsteinas, Xavier Doussot
Life of this patent
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Abstract
A method for carbonitriding a steel part arranged in an enclosure maintained at a reduced internal pressure, the part being maintained at a temperature level, comprising an alternation of first and second steps, a carburizing gas being injected into the enclosure during the first steps only and a nitriding gas being injected into the enclosure only during at least part of at least two second steps.
Claims7
A method for carbonitriding a steel part arranged in an enclosure, the part being maintained at a temperature level, the method comprising an alternation of first steps and second steps, in which each of the first steps is followed by one of the second steps, a carburizing gas being injected into the enclosure during the first steps only and a nitriding gas being injected into the enclosure only during at least part of at least two second steps, the nitriding gas being injected into the enclosure during each of the at least two second steps for a time shorter than the duration of said each of the at least two second steps, the rest of the second step being carried out in the presence of a neutral gas.
Dependencies are inferred from the claim text.