The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 2013
Filed:
Jul. 19, 2011
Toyomitsu Nakamura, Amagasaki, JP;
Atsushi Tomizawa, Minoh, JP;
Naoaki Shimada, Osaka, JP;
Nobusato Kojima, Amagasaki, JP;
Kazuya Ishii, Nishinomiya, JP;
Kazuhito Imai, Amagasaki, JP;
Tamotsu Toki, Nishinomiya, JP;
Toyomitsu Nakamura, Amagasaki, JP;
Atsushi Tomizawa, Minoh, JP;
Naoaki Shimada, Osaka, JP;
Nobusato Kojima, Amagasaki, JP;
Kazuya Ishii, Nishinomiya, JP;
Kazuhito Imai, Amagasaki, JP;
Tamotsu Toki, Nishinomiya, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Abstract
A method of manufacturing a bent metal member comprises supporting the outer surface of a tubular metal material having a Zn-Fe alloy coating layer at two locations spaced in the axial direction of the metal material. The metal material is fed in its axial direction and heated at a position between the two locations to a temperature range of at least the Acpoint at a heating speed such that the rate of temperature increase is at least 3.0×10° C. per second, held so that the time for which the surface of the metal material is at a temperature of 8.0×10° C. or higher is at most 2 seconds, and then rapid cooled. A bending moment is imparted to the healed portion in two or three dimensions to manufacture a bent metal member having on its surface a Zn-based layer which contains an η, phase.