Title:
Zn-Al-Mg PLATED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2019/049307
Kind Code:
A1
Abstract:
This Zn-Al-Mg plated steel sheet includes a steel sheet, an alloy layer formed on a surface of the steel sheet and containing Fe and Si, and a plating layer formed on the surface, of the alloy layer, opposite to the steel sheet, wherein: the average composition of the plating layer and the alloy layer contains, in mass%, 45.0-65.0% of Al, 0.50-5.00% of Si, and 1.00-10.00% of Mg, the remaining portion being Zn, Fe, and impurities; the plating layer contains 0.1-20.0% of a Mg-Si phase in terms of volume fraction; when a 1-μm range from the surface of the plating layer in the thickness direction of the plating layer is defined as the surface layer portion of the plating layer, the average equivalent circular diameter of the Mg-Si phase in the surface layer portion in a direction in which a planar view of the plating layer is obtained is 0.1-15.0 μm; the integrated value of the Si content from the surface of the plating layer to the center in the thickness direction of the plating layer is not less than 0.55 times of the integrated value of the Si content from the surface of the plating layer to the interface.
Inventors:
SHIMODA NOBUYUKI (JP)
Application Number:
PCT/JP2017/032457
Publication Date:
March 14, 2019
Filing Date:
September 08, 2017
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C23C2/12; C22C18/04
Foreign References:
| JP2002322527A | 2002-11-08 | |||
| JP2000328216A | 2000-11-28 |
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
Download PDF:
Previous Patent: AUTOMOBILE SUN VISOR ATTACHMENT STRUCTURE
Next Patent: DRIVING ASSISTANCE DEVICE AND DRIVING ASSISTANCE METHOD
Next Patent: DRIVING ASSISTANCE DEVICE AND DRIVING ASSISTANCE METHOD