Norsk Hydro, A.s.

Norskhydro Asa

Lars Auran

Nils Ryum

Oddvin Reiso

Trond Furu

Kai Magne Vik

Alf E Gravem

Ole Tangen

Ivar O Rod

Gary Hugh Rhinehart

Saumin Shantilal Mehta

Ole Johan Sorheim

Wolfgang W Ruch

Hans Jørgen Roven

Jens Christofer Werenskiold

Jan Halvor Nordlien

Hans Jorgen Roven

Carl Lewin

Henrik Nielsen

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 () rotationally provided within a liner () of a screw housing () having an inlet () for the feeding of the material to be extruded, a compacting or extrusion chamber () and an extrusion die assembly with a die () which forms the shape of the extruded product (). The required compaction takes place at the down-stream end of the screw towards the extrusion chamber () corresponding to up to 540&#xb0; 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 () is restricted from rigid rotation to obtain the required compaction and extrusion pressure.

Screw extruder for continuous extrusion of materials with high viscosity

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.

High corrosion resistant aluminum alloy containing titanium

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.

Wear-resistant aluminum alloy and compressor piston formed therefrom

Sealing device for an extruder

Process for production of reinforced composite materials and products

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).

Method and apparatus for producing metal powder

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Sunndalsora, Norway

Lars Auran