High Strength Aluminum Coated Steel Sheet Having Excellent Anti

High Strength Aluminum Coated Steel Sheet Having Excellent Anti Corrosion Properties And Weldability, And Manufacturing Method Thereof

Abstract: The present invention relates to an aluminum coated steel sheet having excellent anti-corrosion properties and weldability, and a manufacturing method thereof. The aluminum coated steel sheet according to one aspect of the present invention includes: an austenitic base steel sheet including at least 70 area% of an austenite microstructure; and an aluminum coating layer formed on the base steel sheet, wherein the base steel sheet includes at least 80 area% of ferrite in a surface layer portion, which denotes a region extending from the interface with the coating layer to a depth of 100 µm into the base steel sheet, and the aluminum coating layer may have a composition comprising 2-12 wt% of Si, 5-30 wt% of Zn, and 0.1-5 wt% of Mn, with the balance being Al and inevitable impurities.

Patent Information

Application #

Filing Date

27 June 2023

Publication Number

31/2024

Publication Type

INA

Invention Field

METALLURGY

Status

Email

Parent Application

Applicants

POSCO CO., LTD

6261, Donghaean-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do 37859

Inventors

1. LEE, Suk-Kyu

c/o Gwangyang Iron & Steel Works, 20-26, Pokposarang-gil Gwangyang-si, Jeollanam-do 57807

2. OH, Jong-Gi

c/o Gwangyang Iron & Steel Works, 20-26, Pokposarang-gil Gwangyang-si, Jeollanam-do 57807

3. KIM, Myung-Soo

c/o Gwangyang Iron & Steel Works, 20-26, Pokposarang-gil Gwangyang-si, Jeollanam-do 57807

Specification

Documents

Application Documents

#	Name	Date
1	202317043085-STATEMENT OF UNDERTAKING (FORM 3) [27-06-2023(online)].pdf	2023-06-27
2	202317043085-REQUEST FOR EXAMINATION (FORM-18) [27-06-2023(online)].pdf	2023-06-27
3	202317043085-PROOF OF RIGHT [27-06-2023(online)].pdf	2023-06-27
4	202317043085-PRIORITY DOCUMENTS [27-06-2023(online)].pdf	2023-06-27
5	202317043085-POWER OF AUTHORITY [27-06-2023(online)].pdf	2023-06-27
6	202317043085-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [27-06-2023(online)].pdf	2023-06-27
7	202317043085-FORM 18 [27-06-2023(online)].pdf	2023-06-27
8	202317043085-FORM 1 [27-06-2023(online)].pdf	2023-06-27
9	202317043085-FIGURE OF ABSTRACT [27-06-2023(online)].pdf	2023-06-27
10	202317043085-DRAWINGS [27-06-2023(online)].pdf	2023-06-27
11	202317043085-DECLARATION OF INVENTORSHIP (FORM 5) [27-06-2023(online)].pdf	2023-06-27
12	202317043085-COMPLETE SPECIFICATION [27-06-2023(online)].pdf	2023-06-27
13	202317043085-FORM-26 [17-07-2023(online)].pdf	2023-07-17
14	202317043085-Others-210723.pdf	2023-09-06
15	202317043085-GPA-210723.pdf	2023-09-06
16	202317043085-Correspondence-210723.pdf	2023-09-06
17	202317043085-FORM 3 [29-11-2023(online)].pdf	2023-11-29