Method for manufacturing tubes
AssigneeOutokumpu Oy
InventorMauri V. Rantanen
Life of this patent
Estimating the term…
Abstract
The method of the invention relates to the manufacturing of tubes of a continuously cast or the like billet by means of cold working, wherein the temperature of the material rises to the recrystallization range due to the influence of the deformation resistance. The method is particularly related to the further working of billets made of non-ferrous metals such as copper, aluminum, nickel, zirconium and titanium, as well as of their alloys.
Claims8
A method of manufacturing tubes of a non-ferrous metal, starting with a tube shell of a material consisting of copper, nickel, zirconium or titanium or their alloys at ambient temperature which tube shell has been made by continuous casting or extrusion, consisting of planetary cold rolling of the tube shell to cause an area reduction of at least 70 percent in one single pass, and because of said area reduction and resistance of the material to deformation, a temperature rise to the recrystallization temperature of the material, the grain size of the material remaining within the range of 0.005 to 0.050 mm.
Dependencies are inferred from the claim text.