NbC DISTRIBUTION STRENGTHENED AUSTENITE STAINLESS ALLOY AND ITS MANUFACTURING METHOD, STEEL MATERIAL HAVING SEIZURE-RESISTANT AND WEAR-RESISTANT SURFACE BUILD-UP WELDED LAYER AND ITS MANUFACTURING METHOD, AND COOLING TOOL

摘要

PROBLEM TO BE SOLVED: To provide a new alloy of an intermediate cost zone cheeper than WC and a steel material provided with such an alloy as a build-up welded layer, to provide a manufacturing method of the alloy and the steel material and to provide a cooling tool manufactured with the alloy and the steel material, in view of such present circumstances that there is not a material for a cooling tool which has both performances of wear resistance and seizure resistance, besides SKD11 and WC.SOLUTION: A steel material 1 is formed of a build-up welded layer 3 on the surface of a metallic material as base material 2 according to a welding technique such as a plasma powder build-up welding method. Therein, the build-up welded layer uses a mixture obtained by dispersing a small amount of fine particles of niobium carbide having an average particle size less than 45 μm into an austenite stainless upon welding and, thereby, wear resistance and seizure resistance of which the austenite stainless is not possessed are applied to the build-up welded layer 3. Further, as the alloy obtained by dispersing fine particles of niobium carbide having an average particle size less than 45 μm into an austenite stainless, a novel alloy having both of wear resistance and seizure resistance is provided.