Title:
AUTOMOBILE FRAME MEMBER
Document Type and Number:
WIPO Patent Application WO/2020/090916
Kind Code:
A1
Abstract:
An automobile frame member 1 is provided with: a first steel sheet 10; a second steel sheet 20; and a first welded metal part 40 that joins the first and second steel sheets 10, 20 at the interface, wherein the tensile strength of the first steel sheet 10 is 1.0-1.6 GPa, the tensile strength of the second steel sheet 20 is 1.8-2.5 GPa, the first steel sheet 10 is provided with a groove 18, the second steel sheet 20 is laminated on the groove 18, the lowest Vickers hardness of a region within 4 mm around the first welded metal part 40 of the second steel sheet 20 is 80% or lower of the hardness of the second steel sheet 20 outside the region.
Inventors:
ITO YASUHIRO (JP)
FUJIMOTO HIROKI (JP)
FUJIMOTO HIROKI (JP)
Application Number:
PCT/JP2019/042630
Publication Date:
May 07, 2020
Filing Date:
October 30, 2019
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B62D25/04; B62D25/06; B62D25/20
Foreign References:
| JP2015003552A | 2015-01-08 | |||
| JP2016124029A | 2016-07-11 | |||
| US20160257348A1 | 2016-09-08 | |||
| EP3006131A1 | 2016-04-13 | |||
| JP2013071532A | 2013-04-22 | |||
| JP2013189173A | 2013-09-26 |
Other References:
See also references of EP 3766762A4
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (JP)
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