Title:
高強度鋼板
Document Type and Number:
Japanese Patent JP7020446
Kind Code:
B2
Abstract:
To provide a high-strength steel sheet excellent in delayed fracture resistance and corrosion resistance.SOLUTION: A high-strength steel sheet has a surface of a base steel sheet that has a tensile strength of 1180 MPa or more and is covered with a Zn-Mn alloy layer, the Zn-Mn alloy layer providing a coverage of 0.10 g/m2 or more and less than 90 g/m2, a Mn concentration in the Zn-Mn alloy layer being 5 mass% or more and less than 50 mass%. The base steel sheet preferably has a component composition containing a predetermined amount of C, Si, Mn, P, S, Al, N, Cu, and B, further containing one kind or two or more kinds selected from Nb, Ti, V, Mo, Cr, and Ni, and the balance being Fe and inevitable impurities.SELECTED DRAWING: None
Inventors:
Hayato Takeyama
Kentaro Hata
Matsuda samurai
Kazuaki Tsuchimoto
Kentaro Hata
Matsuda samurai
Kazuaki Tsuchimoto
Application Number:
JP2019062706A
Publication Date:
February 16, 2022
Filing Date:
March 28, 2019
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C25D5/26; C22C18/00; C22C38/00; C22C38/58
Domestic Patent References:
| JP9263884A | ||||
| JP2007056307A | ||||
| JP64011994A | ||||
| JP64011993A | ||||
| JP4330970A | ||||
| JP63140098A |
Attorney, Agent or Firm:
Tetsuro Isomura
Akira Kumasaka
Tetsuya Sakai
Kazuhiro Mori
Akira Kumasaka
Tetsuya Sakai
Kazuhiro Mori