Carbide End Mills

A cemented carbide end mill includes a shank and a blade joined to the leading end of the shank which are each made of the cemented carbide alloy. In the manufacturing process of the cemented carbide end mill, first, a shank intermediate manufacturing process for manufacturing a shank intermediate product, which is the half-sintered product of the shank, and a blade intermediate product manufacturing process for manufacturing a blade intermediate product, which is the fully sintered product of the blade, are respectively carried out, secondly, the protrusion of the blade intermediate product is inserted into an insertion hole in the shank intermediate product to form an integrated chip intermediate product. The chip intermediate product is fully sintered, and then cobalt grains are liquid-phase-sintered at a boundary part between the inner circumferential surface of the insertion hole of the shank intermediate product and the outer circumferential surface of the protrusion of the blade intermediate product. Accordingly, the shank intermediate product and the blade intermediate product are strongly joined each other.


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