KNIFE BRAZED WITH CEMENTED CARBIDE AND MANUFACTURING THEREOF

PURPOSE:To prolong the life of a shear knife and prevent the formation of strain during the production process by working a groove on the longitudinal corner part of a base metal and fitting a flat plate made of superhard alloy through a flux brazing material and carrying out brazing. CONSTITUTION:A groove part is previously formed on the longitudinal corner part of a base metal 2, and a long flat plate 3 made of superhard alloy is fitted and fixed through a flux brazing material. The long flat plate 3 is installed on a dolly equipped with an elevating device so that the width direction is vertical. A high frequency heating coil 1 is fixed in the wound state in the longitudinal direction of a work, and the work is heated by raising and lowering. At the time when the brazing material is molten and the optimum temperature for brazing is obtained, the long flat plate 3 at the corner part is pressed and fixed by a press-fitting device 4, and the necessary grinding and boring are carried out. Therefore, the generation of flux exhaustion and brazing agent exhaustion on a shear knife thus formed is prevented.