| 摘要 |
1. A method of case-hardening metallic workpieces, in which the workpieces are subjected to the action of a carbonaceous gas mixture, to which one or more carbonaceous gas component(s) is (are) added in pulsating manner during the action on the workpieces, characterised in that the addition of the carbonaceous gas component(s) is interrupted after a plurality of cycles which in each case consist of a phase of the pulsating addition of carbonaceous gas and a subsequent phase without the addition of carbonaceous gas, and is only resumed after the expiry of a pause which lasts longer than a cycle by a factor of 10 to 100. |
