BUMPER BEAM - NIPPON STEEL & SUMITOMO METAL CORP

Title:

BUMPER BEAM

Document Type and Number:

WIPO Patent Application WO/2018/173759

Kind Code:

A1

Abstract:

This bumper beam 100 comprises a closing plate 2 and a hat member 1. The hat member 1 has a top plate 1a, two flanges 1c, and two vertical walls 1b. The hat member 1 includes a high-strength section 10H and a low-strength section 10L. The high-strength section 10H is formed in a region including the respective longitudinal centers of the two vertical walls 1b and extending at least 250 mm in the longitudinal direction. The tensile strength of the high-strength section 10H is 1.5 GPa or higher. The low-strength section 10L is formed outside the high-strength section in a region extending in the longitudinal direction by a length equal to or greater than the height of the vertical walls. The tensile strength of the low-strength section is lower than the tensile strength of the longitudinal center of the two vertical walls.

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Inventors:

KOGA ATSUO (JP)
NAKAZAWA YOSHIAKI (JP)
HIROSE SATOSHI (JP)

Application Number:

PCT/JP2018/008856

Publication Date:

September 27, 2018

Filing Date:

March 07, 2018

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

B60R19/04; F16F7/00; F16F7/12

Domestic Patent References:

WO2016117335A1

2016-07-28

Foreign References:

JP2014054909A	2014-03-27
JP2007521173A	2007-08-02
US20150102614A1	2015-04-16

Other References: