METHOD OF THERMAL TREATMENT OF TOOLS MADE OUT OF FAST-CUTTING STEELS IN SALT BATHS

FIELD: metallurgy; engineering industry and instrument-making industry. ^ SUBSTANCE: the invention presents a method of thermal treatment of tools made out of fast-cutting steels in salt baths. The method is pertinent to the field of metallurgy and production of tools and may be used at a thermal treatment of tools made out of fast-cutting steels. The technical result from the invention is a decrease of labor input, an increase of productivity and speeding up of the production process. The technical result of the invention is achieved due to the fact, that preheating of the tools is conducted by a method, which ensures the given hardness (HRC, 36-46) on the tail part and on the working part (HRC, 62) after a final thermal treatment of the tools. The such technology of heating ensures hardness HRC, 36-46 on the tail part of the tools without additional modes of the thermal treatment, that allows to reduce labor input, to increase labor productivity and to speed up production process. The invention also may be used in engineering industry and instrument-making industry. ^ EFFECT: the invention allows to decrease labor input, to increase productivity and to speed up production process. ^ 1 ex, 2 tbl