Method for levelling a metal strip or sheet
AssigneeNippon Steel Corporation
InventorsHiroshi Takechi, Mitsunobu Abe, Ryoseki Katsutani, Yoshio Saito
Life of this patent
Estimating the term…
Abstract
A method for levelling a metal strip or sheet in which the metal strip or sheet is subjected to repeated bending by means of a roll arrangement of two or more rolls having a diameter of at least 600 times the thickness of the metal while cooling the metal strip or sheet from at least about 210.degree. C to about 50.degree. C at a cooling rate not lower than a critical cooling rate C as defined by the following formula but not higher than 200.degree. C/sec., ##EQU1##
Claims4
A method for levelling a metal strip or sheet which is at a temperature of about 210.degree. C comprising applying a repeated bending to the heated metal strip or sheet by means of a roll arrangement of two or more rolls each having a diameter of at least 600 times the thickness of the metal while cooling the metal strip or sheet from at least about 210.degree. C to about 50.degree. C at a cooling rate not lower than a critical cooling rate C as defined by the following formula and not higher than 200.degree. C/sec., ##EQU5##
Dependencies are inferred from the claim text.