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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.:

US 11807924 B1

PDFFull Text
Date of Patent:
Nov. 07, 2023

Filed:

Nov. 20, 2017

Al plated welded pipe for hardening use and al plated hollow member and method for producing same

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Jun Maki, Tokyo, JP;

Soshi Fujita, Tokyo, JP;

Toyomitsu Nakamura, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C22C 38/54 (2006.01); B23K 11/00 (2006.01); B23K 35/02 (2006.01); B23K 35/30 (2006.01); C21D 9/08 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C25D 3/44 (2006.01); C25D 7/04 (2006.01); B23K 103/04 (2006.01); B23K 101/06 (2006.01);
U.S. Cl.
CPC ...
C22C 38/54 (2013.01); B23K 11/002 (2013.01); B23K 35/0261 (2013.01); B23K 35/3053 (2013.01); C21D 9/08 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C25D 3/44 (2013.01); C25D 7/04 (2013.01); B23K 2101/06 (2018.08); B23K 2103/04 (2018.08);
Abstract

An Al plated electric resistance welded steel pipe for hardening use suppressing the formation of scale to the inside of the plating layer while performing hot forming and an Al plated hollow member using that Al plated electric resistance welded steel pipe, wherein the Al plated electric resistance welded steel pipe for hardening use is comprised of a base material made of a tubular steel plate and having a predetermined chemical composition and an electric resistance welded zone provided at a seam portion of the steel plate and extending in a longitudinal direction of the steel plate, the base material is further provided with an intermetallic compound layer positioned on the surface of the steel plate and including an Al—Fe—Si-based intermetallic compound and an Al plating layer positioned on the surface of the intermetallic compound layer and containing Al and Si, and 70×X/D≤Y/t≤30 is satisfied, wherein X (μm) is a thickness of the intermetallic compound layer, Y (μm) is a thickness of the Al plating layer, t (mm) is a pipe thickness of the steel pipe, and D (mm) is an outside diameter of the steel pipe.

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