FIELD: hardening equipment. SUBSTANCE: vacuum furnace has a lined chamber with a metal muffle from a tube from stainless steel 12Х18Н10Т deformed by compression to a rectangular cross section on the length of the working part inserted into the chamber. A heater-metering device with a feed tube on the connecting part outside the cooled zone is mounted on the connecting part of a converter. Vacuum-outlet is located on the level of 2-3 screens of the converter cover which is not water-cooled. EFFECT: improved life cycle, reduced power input, improved efficiency of carbonizer usage. 4 cl, 2 dwg
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