PURPOSE: To manufacture a combined body having excellent corrosion resistance, wear resistance, heat resistance, etc., by filling up non-ferrous metal having m.p. lower than m.p. of iron, into a porous reinforced material coating fine hole surface layer part of a ferrous porous body with iron oxide, etc.
CONSTITUTION: Iron powder or powder containing iron as essential component and material except iron is sintered at about 800 - 1,300°C for about 1 hr to manufacture the porous body having about 45 - 81 vol% porosity. This porous body is held under oxidizing atmosphere at about 100 - 500°C for about 2 hr or humidified and heated with a humidifying-heater and the fine hole surface layer part in the porous body is coated with oxide or hydroxide film having about 0.01 - 10μ to form the ferrous porous reinforced material. Successively, the non-ferrous metal (Mg, Al, etc.) having m.p. lower than m.p. of iron, is filled up into this porous reinforced material to form the combined body. By this method, the combined body having excellent fatigue resistance and creep resistance, etc., is obtd. and available to cylinder block, piston, etc.
TANAKA HIROHISA
TAN ISAO
SAKAMOTO KAZUTAKA
