Title:
ZN-PLATED HOT-STAMPED MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2022/091351
Kind Code:
A1
Abstract:
A Zn-plated hot-stamped molded article according to the present invention comprises a steel material, a Zn-based plating layer, and an oxide layer. An upper layer, which is a surface side region of the Zn-based plating layer, has a two-phase structure of a Γ-phase and an Fe-Zn solid solution. A lower layer, which is a region of the Zn-based plating layer excluding the upper layer, has a single-phase structure of an Fe-Zn solid solution. The thickness of the upper layer and the thickness of the lower layer satisfy the following relational expression. An Mn content ratio, which is ratio Max.Mn/Min.Mn of a maximum value Max.Mn to a minimum value Min.Mn of the Mn content of the surface of the Zn-plated hot-stamped molded article is 10.0 or less, and in terms of mass%, an average value Ave.Mn is 0.5-7.5%. 0.20 ≦ (upper layer thickness)/(upper layer thickness + lower layer thickness) ≦ 0.80
Inventors:
SENGOKU AKIHIRO (JP)
AKIBA KOJIRO (JP)
TAKEBAYASHI HIROSHI (JP)
NONAKA TOSHIKI (JP)
AKIBA KOJIRO (JP)
TAKEBAYASHI HIROSHI (JP)
NONAKA TOSHIKI (JP)
Application Number:
PCT/JP2020/040848
Publication Date:
May 05, 2022
Filing Date:
October 30, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C2/06; B21D22/20; C23C2/26; C23C2/28; C21D1/18; C21D9/00; C22C18/00; C22C38/00; C22C38/58
Domestic Patent References:
| WO2015152284A1 | 2015-10-08 |
Foreign References:
| JP2007182608A | 2007-07-19 | |||
| JP2007211276A | 2007-08-23 | |||
| JPS582511B2 | 1983-01-17 |
Other References:
See also references of EP 4239098A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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