A METHOD OF HARDENING OF A HARD-ALLOYED DIAMOND TOOL Russian patent published in 2005 - IPC

FIELD: mining industry and mechanical engineering.

SUBSTANCE: the invention presents a method of hardening of a hard-alloyed diamond tool. The invention is pertinent to methods of hardening of the hard-alloy diamond tools and may be used in engineering industry and mining industry. The offered method provides for deposition on the effective surfaces of the instrument of a layer of the luting containing 10-15 volumetric % of soluble silicate, used in the capacity of binding, and a powder consisting of the following ingredients (in mass %): a powder of metal of impregnation of a lower die of a fraction less than 20 microns - 56-72, a powder of aluminum oxides - 6-15, a powder of alloy of a fraction less than 50 microns - the rest. At that the layer depth of the luting makes 0.5-1.0 mm, then conduct a thermal treatment of the effective surfaces of the tool by the laser illumination with a power density of laser illumination equal to 1^.103-2^.105 W/cm2 and at a speed of treatment equal to 2.0-20.0 mm/s. In special cases of realization of the invention in the capacity of a metal of impregnation they use copper or a copper alloy; illumination by a laser beam is conducted in an aerosphere of a noble gas; in the capacity of noble gas they use argon. The technical result of the invention is an increased service life of the hard-alloy diamond tool at operation and a decrease of a specific consumption of diamonds.

EFFECT: the invention ensures an increase of service life of the hard-alloy diamond tool at operation and a decrease of a specific consumption of diamonds.

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