METHOD FOR JOINING SINTERED PART

PURPOSE:To surely and securely couple parts by tack joining the joint surfaces of two porous parts which are discretely subjected to powder sintering by infiltration, then integrally coupling the tack joined parts by high-density energy beam welding. CONSTITUTION:After the joint surfaces 11, 12 of the porous sintered parts are tack joined by infiltration, the tack joined parts 21 of both the sintered parts 5, 10 are integrally joined by high-density energy beam welding, for example, electron beam welding. The holes of the respective sintered parts 5, 10 existing in the tack joined parts 21 by the infiltration of the joint surfaces 11, 12 of the sintered parts 5, 10 are filled with a molten metal of copper, etc., and the oil, gases, etc., remaining in the holes are simultaneously extruded to the outside by the inflow of the molten metal into the holes. Generation of blow holes is prevented and the base metals of the resintered parts 5, 10 are welded and coupled to each other at a high depth by the electron beam welding of deep penetration.