Title:
HAT MEMBER AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/174082
Kind Code:
A1
Abstract:
The hat member 1 is provided with a top surface part 13, a first ridgeline part 113, and two sidewalls 11. The two sidewalls 11 have a center hardness Dc of 300HV or greater. Each of the two sidewalls 11 has a soft part L and a strength transition part T adjoining the soft part L. Hardness Dn of the soft part L is less than the center hardness Dc at least by 8% (Dc - Dn ≥ 0.08 Dc). The strength transition part T is disposed in a range of 0.5 mm or greater from the soft part L toward one end. Hardness Dt of the strength transition part T changes in a hardness range from 8% to 1% less than the center hardness Dc(0.92 Dc ≤ Dt ≤ 0.99 Dc). The hat member 1 is further provided with two second ridgeline parts 114 and two flanges 14.
Inventors:
KUBO MASAHIRO (JP)
NAKAZAWA YOSHIAKI (JP)
NOMURA NARUHIKO (JP)
SUZUKI TOSHIYA (JP)
NAKAZAWA YOSHIAKI (JP)
NOMURA NARUHIKO (JP)
SUZUKI TOSHIYA (JP)
Application Number:
PCT/JP2018/011149
Publication Date:
September 27, 2018
Filing Date:
March 20, 2018
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B62D25/00; B21D5/01; C21D1/18; C21D9/00; B21D22/20; B21D47/01; B21D53/86
Domestic Patent References:
| WO2013168331A1 | 2013-11-14 | |||
| WO2013137454A1 | 2013-09-19 |
Foreign References:
| DE102016103962B3 | 2017-03-02 | |||
| JP5894081B2 | 2016-03-23 | |||
| JP5655338B2 | 2015-01-21 | |||
| JP2011173166A | 2011-09-08 | |||
| JP5894081B2 | 2016-03-23 |
Other References:
See also references of EP 3604085A4
Attorney, Agent or Firm:
UEBA, Hidetoshi et al. (JP)
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