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Title:
PRESS MOLDED STEEL ARTICLE
Document Type and Number:
WIPO Patent Application WO/2019/198781
Kind Code:
A1
Abstract:
A press molded steel article having a first site and a second site connected to the first site. The metal composition at the first site has a martensite volume fraction of at least 90% and the aspect ratio of the prior γ grain size at the first site is at least 1.4 times the aspect ratio for the prior γ grain size at the second site.

Inventors:
YOSHIKAWA Nobuo (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
TSUKANO Yasushi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
YAMAGATA Mitsuharu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2019/015735
Publication Date:
October 17, 2019
Filing Date:
April 11, 2019
Export Citation:
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Assignee:
NIPPON STEEL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
International Classes:
F16H9/04; C21D1/18; C21D9/00; C22C38/00; C22C38/60
Domestic Patent References:
WO2012120692A12012-09-13
WO2018012603A12018-01-18
Attorney, Agent or Firm:
TANAI Sumio et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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