Title:
SKELETON MEMBER
Document Type and Number:
WIPO Patent Application WO/2020/100886
Kind Code:
A1
Abstract:
This skeleton member has a flat plate part that has a recess part having a pair of wall sections and a bottom section between the tip sections the pair of wall sections and extending in the extension direction of the wall section. The Vickers hardness of the region excluding the recess part in the flat plate part is at least 330 Hv, and the depth of the recess part is at least 5 mm. When L0 is the width of the recess part, and L1 is the length of the inner peripheral wall of the recess part in a cross-sectional view, the recess part is composed of the pair of wall sections and the bottom section, the value of (L1-L0)/Lo is 0.18 to 2.8 inclusive, and the Vickers hardness of a ridge section extending between the flat plate part and the recess part is 1.06 to 1.20 times the Vickers hardness of the region excluding the recess part in the flat plate part.
Inventors:
KUBOTA HIROAKI (JP)
TODA YURI (JP)
KAWATA HIROYUKI (JP)
TODA YURI (JP)
KAWATA HIROYUKI (JP)
Application Number:
PCT/JP2019/044309
Publication Date:
May 22, 2020
Filing Date:
November 12, 2019
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B62D25/00; B21D47/01; B21D53/88
Domestic Patent References:
| WO2015053125A1 | 2015-04-16 |
Foreign References:
| KR101509966B1 | 2015-04-07 | |||
| JP2018213991A | 2018-11-14 | |||
| JP2007246021A | 2007-09-27 |
Other References:
See also references of EP 3882110A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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