FIELD: tool making. SUBSTANCE: laser hardening of tap is carried out directly after turning of grooves and after volumetric hardening heat treatment at the point of future threading. Laser beam is moved parallel with turned grooves, width of laser-hardened strip corresponds to the width of tap cutting portion. Next steps are cryogenic treatment, cutting and grinding of threads, and backing-off of the tool. EFFECT: higher strength of tap. 2 dwg, 1 tbl
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