To provide a structural member made of a cemented carbide and manufactured by a powder metallurgy process, in which at least one additive for controlling growth of crystals of V, Cr, Ti, Ta and Nb, shows a concentration transition in a step-by-step manner at least partially, and thereby the mechanical characteristics show the gradual change, and to provide a method for manufacturing the structural member.

The manufacturing method is characterized by applying a dispersion liquid or a solution, which includes a finely dispersed or dissolved additive for inhibiting growth of the crystals, on the surface of a roughly processed workpiece. The dispersion liquid or the solution intrudes into the inside of the roughly processed workpiece along opening gaps, and thereby the additive for controlling growth of the crystals is dispersed into the roughly processed workpiece in a step-by-step manner. In addition, the additive uniformly dispersed in the state of the solution into the roughly processed workpiece, can be gradually removed from the vicinity of a perimeter of the roughly processed workpiece by heat treatment or with a solvent.