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Title:
HOT PRESS-FORMED ITEM MANUFACTURING METHOD, PRESS-FORMED ITEM, DIE, AND DIE SET
Document Type and Number:
WIPO Patent Application WO/2020/009170
Kind Code:
A1
Abstract:
A hot press-formed item manufacturing method wherein a die 11 has, in the entire region adjacent to a die shoulder section 11B within a steel plate contact surface 11A, a hard layer 11C having a hardness Hv_Die of HV1000 to 1800 and a skewness (Rsk) of -5.0 to 1.2 as measured in a direction from the outside of a die hole 11D toward the inside, said steel plate contact surface 11A being a surface to the outside of the die hole 11D and contacting a galvanannealed steel sheet 10 prior to the same being subjected to hot press-forming.

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Inventors:
KUBO MASAHIRO (JP)
NOMURA NARUHIKO (JP)
SUZUKI TOSHIYA (JP)
Application Number:
PCT/JP2019/026535
Publication Date:
January 09, 2020
Filing Date:
July 03, 2019
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B21D37/01; B21D22/20; B21D24/00; B21D24/04; B21D22/26
Domestic Patent References:
WO2016171273A12016-10-27
Foreign References:
JP2015205328A2015-11-19
JPH05115930A1993-05-14
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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