| 摘要 |
PURPOSE:To improve the durability and stability of a rolling roll, etc. by sintering a powder mixture composed of metallic powder consisting of Cr-Fe, etc. and ceramic powder and forming a filler rod thereof. CONSTITUTION:The fine powder mixture is manufactured by mixing uniformly the heat resistant metallic powder consisting of Cr-Fe or Cr-Ni-Mo-Co, etc. and the ceramic powder consisting of carbide, nitride, etc. The powder mixture is then sintered under and at the prescribed pressurizing force and sintering temp. to form the composite filler rod. The rolling roll or the like is subjected to build-up welding by TIG welding, etc. using such filler rod to form the build-up layer on the surface of the roll, etc. Since the build-up layer is welded and united to the boundary with the base material, the adhesive strength thereof is improved. The durability and stability of the roll, etc. by the above-mentioned method are thus improved. |
