公开(公告)号：US20200347489A1

公开(公告)日：2020-11-05

申请号：US16753961

申请日：2017-11-20

Applicant: NIPPON STEEL CORPORATION

Inventor： Jun MAKI ,  Soshi FUJITA ,  Toyomitsu NAKAMURA

IPC: C22C38/54 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/02 ,  C22C38/06 ,  C22C38/00 ,  C21D9/08 ,  B23K35/30 ,  B23K35/02 ,  C25D3/44 ,  C25D7/04 ,  B23K11/00

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.

公开(公告)号：US20200232077A1

公开(公告)日：2020-07-23

申请号：US16487797

申请日：2018-03-23

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinichi YAMAGUCHI ,  Jun MAKI ,  Soshi FUJITA ,  Shintaro YAMANAKA ,  Michiko KONNO ,  Tetsuya TOBA

IPC: C22C38/50 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C23C2/12 ,  C23C2/26 ,  C23C28/00

Abstract: A sheet includes: a base; an Al-plating layer on at least one of opposite surfaces of the base; an intermediate coating layer on a surface of the Al-plating layer; and a surface coating layer formed on a surface of the intermediate coating layer and containing ZnO particles with a mean particle size of 0.10 μm or more and 5.00 μm or less and an organic resin such that an amount of coating of the ZnO particles is 0.5 g/m2 or more and 10.0 g/m2 or less in terms of metallic zinc.