Abstract: A screw extruder for the continuous extrusion of materials with high viscosity, in particular metals such as aluminum and its alloys. The extruder includes an Archimedes screw (1) rotationally provided within a liner (2) of a screw housing (4) having an inlet (11) for the feeding of the material to be extruded, a compacting or extrusion chamber (5) and an extrusion die assembly with a die (6) which forms the shape of the extruded product (7). The required compaction takes place at the down-stream end of the screw towards the extrusion chamber (5) corresponding to up to 540° of the rotation of the screw, or up to 1.5 turns of the screw flight length. The solid plug of metal formed at the end of the screw and extrusion chamber (5) is restricted from rigid rotation to obtain the required compaction and extrusion pressure.

Abstract: Screw extruder for the continuous extrusion of materials with high viscosity, in particular metals such as aluminium and its alloys. The extruder includes an Archimedes screw (1) rotationally provided within liner (2) of a screw housing (4) with an inlet (11) for the feeding of the material to be extruded, a compacting or extrusion chamber (5) and an extrusion die assembly with a die (6) which forms the shape of the desired extruded product (7). The design of the screw (1) and liner (2) is such that the required compaction takes place at the down-stream end of the screw towards the extrusion chamber (5) corresponding to up to 540° of the rotation of the screw, or up to 1.5 turn of the screw flight length, and that the solid plug of metal thus formed at the end of the screw and extrusion chamber (5) is restricted from rigid rotation to obtain the required compaction and extrusion pressure.

Abstract: An aluminium-based alloy consisting of 0.05-1.00% by weight of iron, 0.05-0.60% by weight of silicon, less than 0.50% by weight of copper, up to 1.20% by weight of manganese, 0.02 to 0.20% by weight of zirconium, up to 0.50% by weight of chromium, 0.02 to 1.00% by weight of zinc, 0.02 to 0.20% by weight of titanium, 0.02 to 0.20% by weight of vanadium, up to 2.00% by weight of magnesium, up to 0.10% by weight of antimony, up to 0.02% by weight of incidental impurities and the balance aluminium, the total amount of Ti plus Cr plus V being less than 0.3% by weight and the amount of V being lower than the amount of Cr, said aluminium-based alloy exhibiting high corrosion resistance and high extradability.

Abstract: An extrudable, drawable and brazeable aluminum alloy that has improved corrosion resistance and is suitable for use in thin-wall fluid-carrying tube lines. Preferred alloys consist essentially of, by weight, about 0.17 to about 0.22% iron, about 0.06 to about 0.10% silicon, about 0.30 to about 0.70% manganese, about 0.10 to about 0.30% magnesium, and about 0.19 to about 0.25% zinc, with the balance aluminum and incidental impurities.

Abstract: An aluminum-based, corrosion resistant, alloy comprising: 0.06-0.35% by weight of iron, 0.05-0.15% by weight of silicon, 0.01-1.0% by weight of manganese, 0.02-0.60% by weight of magnesium, 0.05-0.

Abstract: A corrosion-resistant and high tensile strength aluminum-based alloy consisting of, by weight, about 0.06-0.25% iron, 0.05-0.15% silicon, 0.03-0.08% manganese, 0.10-0.18% titanium, 0.10-0.18% chromium, up to 0.50% copper, up to 0.70% zinc, up to 0.02% incidental impurities, and the balance aluminum.

Abstract: An improved aluminum alloy containing specific additions of silicon and copper to improve wear resistance and improve solutionizing of the alloying constituents, and a process for forming a wear-resistant component from the alloy. The improved aluminum alloy is also characterized by good strength and sufficient ductility so as to permit forging of a wear-resistant component from the alloy. A preferred composition for the alloy, in weight percent, is about 13.0 to about 15.5 percent silicon; about 0.8 to about 2.0 percent copper; about 0.8 to about 1.3 percent magnesium, and the balance being aluminum and impurities. The aluminum alloy is particularly well suited to form pistons of the type used in compressors of automotive air conditioning systems.

Abstract: An extruder with an air evacuation mechanism includes a cylinder with a die mounted at an outlet end and a piston movable between a position outside an opposite inlet end and a position inside the cylinder. A separate sealing device is mounted at the inlet end and accompanies the piston when it is retracted from the cylinder. The sealing device includes a casing with sealing rings mounted on the piston or a piston rod thereof.

Abstract: Particle reinforced composite material produced by mixing granules of a composite material formed by rapidly solidifying a melt comprising a based light metal matrix and particles of a non-metallic reinforced material with granules of unreinforced host metal matrix, compacting the mixture and applying a shear deformation on said mixture.

Abstract: A method for producing metal powder comprising steps of feeding a molten metal into a closed vessel, atomizing of the metal by inert gas and finally cooling of particles in an atmosphere of inert gas and atomized water is provided.An apparatus for producing metal powder comprises a closed vessel (1) provided with atomizing nozzles (2) and means for providing inert gas, and another set of nozzles (4) for supply of atomized cooling medium located on one or several vertically displaced levels along the internal perimeter of the vessel (1).