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Patent Searching and Data


Title:
SHOCK ABSORBING MEMBER, METHOD OF MANUFACTURING SHOCK ABSORBING MEMBER, AND METHOD OF MANUFACTURING STEEL PLATE FOR COLD PLASTIC WORKING
Document Type and Number:
WIPO Patent Application WO/2020/262653
Kind Code:
A1
Abstract:
Provided are a shock absorbing member, a method of manufacturing a shock absorbing member, and a method of manufacturing a steel plate for cold plastic working, which enable an increase in shock absorption energy and a reduction in the thickness of a steel plate serving as a material. The shock absorbing member comprises a ridge part that, viewed from a longitudinal direction, is formed in a curved shape, and a wall part extending from the ridge part. In the wall part, a ratio σ5/τ5 between a tensile stress σ5 when elongation strain in a tensile test is 5% and a shear stress τ5 when shear strain in a shear test is 5√3% is less than or equal to 1.70, or a ratio σ10/τ10 between a tensile stress σ10 when elongation strain in a tensile test is 10% and a shear stress τ10 when shear strain in a shear test is 10√3% is less than or equal to 1.70. A Vickers hardness Hvc is greater than or equal to 250 in a central part of the wall part, as viewed from the longitudinal direction.

Inventors:
NAGANO, Mai (JP)
YONEMURA, Shigeru (JP)
UENISHI, Akihiro (JP)
Application Number:
JP2020/025355
Publication Date:
December 30, 2020
Filing Date:
June 26, 2020
Export Citation:
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Assignee:
NIPPON STEEL CORPORATION (JP)
International Classes:
B62D21/00; B62D21/02; B62D21/15; C21D8/00; C21D9/46; C22C38/00; C22C38/06; C22C38/58; F16B7/12; F16F7/00; F16F7/12; B62D25/04; B62D25/06; B62D25/20
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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