US 11,998,967 B2
Panel-shaped formed product
Kenichiro Otsuka, Aichi (JP); Yoshiaki Nakazawa, Hyogo (JP); Naruhiko Nomura, Hyogo (JP); Toshiya Suzuki, Hyogo (JP); and Masahiro Kubo, Osaka (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP)
Filed by NIPPON STEEL CORPORATION, Tokyo (JP)
Filed on Mar. 23, 2021, as Appl. No. 17/209,473.
Application 17/209,473 is a division of application No. 15/537,955, granted, now 11,000,890, previously published as PCT/JP2015/006394, filed on Dec. 22, 2015.
Claims priority of application No. 2014-263665 (JP), filed on Dec. 25, 2014; application No. 2014-263666 (JP), filed on Dec. 25, 2014; and application No. 2015-120036 (JP), filed on Jun. 15, 2015.
Prior Publication US 2021/0205871 A1, Jul. 8, 2021
Int. Cl. B60J 5/04 (2006.01); B21D 22/02 (2006.01); B21D 22/22 (2006.01); B21D 22/26 (2006.01); B21D 53/88 (2006.01); B21D 22/06 (2006.01)
CPC B21D 22/022 (2013.01) [B21D 22/22 (2013.01); B21D 22/26 (2013.01); B21D 53/88 (2013.01); B60J 5/04 (2013.01); B60J 5/0413 (2013.01); B21D 22/06 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A panel-shaped formed product made of a steel sheet having a quenched martensitic structure and a tensile strength of not less than 1200 MPa, comprising:
a polygonal top panel portion,
an opening portion provided in the top panel portion, and
a vertical wall portion extending from at least two adjacent borders among borders of the top panel portion, wherein
at least one pair of each vertical wall portion of pairs of adjacent vertical wall portions among the vertical wall portions has a step portion, and a height of the vertical wall portion with the step portion is 40 mm or more.