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AssigneeGranges Nyby AB
InventorChrister Aslund
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A method and a capsule and a blank for producing tubes, bars or similar profiled elongated dense metal objects, preferably in stainless steel qualities, by single or multi-stage extrusion of capsules which are filled with powder of metals or metal alloys or mixtures thereof or with mixtures of powder of metals and/or metal alloys with ceramic powder and sealed and which are adapted in their form to the desired object or intermediate product, as starting material a powder being used which consists at least predominantly of substantially spherical grains and the capsule filled with said powder and sealed being compressed by means of cold-isostatic pressure acting all round until the density of the powder reaches at least 80% of the theoretical density.
A blank for extruding an elongated dense metal object, said blank comprising a metal container having metal powder compressed therein, said metal powder comprising metal particles that are substantially spherical, and said container being formed from a ductile metal, the wall thickness of said container being at most 5% of the outer diameter of said container, said metal container and the metal powder therein having been subjected to cold-isostatic pressure acting on all surfaces of said container so that said metal container and the metal powder therein are compressed together until the density of said metal powder therein reaches at least 80% of the theoretical density.
A blank for extruding an elongated dense metal object which comprises a thin walled metal container filled with compressed metal powder, said metal powder having metal particles that are substantially spherical and that have a particle size of less than 1 mm, and said container being formed from a ductile metal, the wall thickness of said container being at most 5% of the outer diameter of said container;
In a method for producing a blank for extruding an elongated dense metal object wherein metal powder is sealed in a metal container and the metal container with the metal powder therein is compressed, the improvement wherein (1) the metal powders of said metal powder are substantially spherical, (2) said container is formed from a ductile metal, (3) the wall thickness of said container is at most 5% of the outer diameter of said container, (4) said metal container is subjected to cold-isostatic pressure acting on all surfaces of said container, and (5) said metal container is compressed until the density of the metal powder therein reaches at least 80% of the theoretical density.
In a method for producing a blank for extruding an elongated dense metal object in which a powder comprising:
Dependencies are inferred from the claim text.