FIELD: heat- treating furnaces. SUBSTANCE: furnace has body, over for loading and unloading the parts, inductor or thermoelectric heater, outer shield-vacuum heat insulation, retort with double walls which form closed chamber filled with liquid heat-transfer agent on form of potassium- sodium eutectic. Heat insulation is made in form of two envelopes with layers of foil between them; space between envelopes is evacuated. EFFECT: improved quality of production process and reduced power requirements. 2 cl, 1 dwg
