Article made of a magnesium alloy tube
OwnerEli Spinat, Stefan Jaegar +1inventors
InventorsEli Spinat, Stefan Jaegar, Adi Ben-Artzy
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Abstract
An article made of a magnesium alloy tube (23) is provided, the article having a grain size of between 10 μm and 50 μm and being manufactured by internal high pressure forming. The temperature of the internal high pressure forming is between 200° C. and 605° C. The tube (23) is manufactured by extrusion, wherein the extrusion temperature is between 300° C. and 605° C., extrusion speed is substantially between 5 mm/sec and 45 mm/sec, and the extrusion reduction ratio is substantially between 10:1 and 50:1. The tube (23) may be annealed for 6 hours at 300° C.
Claims23
An article made of a magnesium alloy tube, the article having a grain size of between 10 μm and 50 μm and being manufactured by internal high pressure forming.
A process for manufacture of a tube from a billet made of a magnesium alloy, the process comprising:
- (a) heating the billet to a predetermined temperature that is within a range of 300° C. to 605°;
- (b) extruding the billet, using an extrusion press having a ram, an internal piercing mandrel, and a die, while maintaining the temperature of the billet to stay within the range;
- and
- (c) applying a force to the billet so that it is forced between the die and the mandrel at a predetermined extrusion speed of the ram to form a tube having a predetermined extrusion reduction ratio;
- wherein the extrusion speed is substantially between 5 mm/sec and 45 mm/sec, and the extrusion reduction ratio is substantially between 10:1 and 50:1.
Dependencies are inferred from the claim text.