Abstract: The properties of copper-tin-lead alloys are improved with respect to mechanical resistance and resistance to corrosion by the incorporation therein, in specific proportions of nickel. Antifriction layers on steel supporting strips are obtained by sintering and rolling onto steel strips metal powder particles obtained by powdering a metal alloy of 2-10% nickel, 8-27% lead, 0.5-10% tin and the balance copper.

Abstract: A method of manufacture of novel light-weight pistons of aluminum forgings with an integral iron insert ring by fusion welding is described. The aluminum piston forging is provided with a configuration adapted to receive the iron insert ring which may be coated to provide an inter-metallic joining alloy. The configured piston forging is placed in a mold, the ring is positioned in the configuration. The mold is rotated and molten alloy is introduced at an angle to deoxidize the forging and the ring, sweep the oxides to non-critical areas of the mold and to join the forging to the ring upon cooling to form a fusion weld.

Abstract: A method for manufacturing a piston for internal combustion engines, compressors and the like, comprising a head portion articulately connected to a separate skirt portion, wherein the skirt portion comprises a steel tubular part obtained by cutting, bending and closing of a piece of steel strip, the outer surface of said tubular part being covered by a layer of antifriction material bonded to said outer surface prior to the cutting, bending and closing of the steel strip.

Abstract: The invention relates to the depositing of aluminum alloys useful as material for the manufacture of sleeve bearings. Aluminum and lead in the proper ratio are melted in a furnace, transferred to a holding furnace wherein the temperature of the melt is maintained within the molten range, and the melt is directed to an atomizing or nebulizing chamber. According to the invention, the molten material flowing into the atomization chamber is subjected to an atomizing gas flow having a specified angle of incidence to atomize the molten flow of alloy into small particles which are directly deposited on a continuous pure aluminum strip which moves under the atomization chamber at a preset rate, the aluminum strip with the alloy layer is submitted to a rolling operation and thereafter the strip is rolled together with a steel strip, to provide a cladding of the alloy-aluminum onto the steel of the backing and supporting strip.

Abstract: A method of improving steel-backed antifriction alloy; composite strips and products therefrom, wherein the antifriction alloys previously deposited on the steel backing strip are subjected throughout the strip length to a spot-by-spot fusion operation performed by a highly-concentrated energy beam (electron or other), the intensity and displacement rate of said beam being adjusted in respect of the composite strip in such a manner as to afford a spot-by-spot fusion of the anti-friction alloys to a depth equal to the anti-friction layer thickness; and a method wherein concentration of said energy beam is adjusted so as to enable the mass surrounding any given melting spot to cause an abrupt cooling of said spot when the energy beam is moved to an adjoining spot.