PURPOSE: To prevent the corrosion on the surface of a ferrous member and the formation of the coarser structure of a sintered layer by adhering a powder alloy sheet to the surface of the ferrous member and heating the same to form a liquid phase and to joint the sheet and member then subjecting the liquid phase part to a high alloying treatment then to normal sintering.

CONSTITUTION: The powder alloy sheet 2 consisting of a wear resistant Fe-Mo-Cr eutectic alloy, etc. is adhered to the ferrous member 1 consisting of flake graphite cast iron, etc. and in the stage of subjecting the member and sheet to the heat treatment in the non-oxidizing atmosphere thereafter, the member 1 and the sheet 2 are first heated until the liquid phase enough to joint the two member is formed on the joint surface between the member 1 and the sheet 2, then the assembly is quickly cooled to convert the liquid phase part to the solid phase, thereby joining the two members. The assembly is then subjected to the high alloying treatment of the high melting point to generate a diffusion between the part converted to the solid phase and the metallic element around the same and is then subjected to the normal sintering to sinter the main part of the sheet 2 in the half liquid phase. The sheet 2 is thus securely sintered and joined to the member 1 without spoiling the wear resistance.