Title:
A manufacturing method of a bolt and a bolt
Document Type and Number:
Japanese Patent JP6088252
Kind Code:
B2
Abstract:
A steel is used for providing a bolt that has a high strength and still exhibits excellent hydrogen embrittlement resistance. The steel contains C of 0.30% to 0.50%, Si of 1.0% to 2.5%, Mn of 0.1% to 1.5%, P of greater than 0% to 0.015%, S of greater than 0% to 0.015%, Cr of 0.15% to 2.4%, Al of 0.010% to 0.10%, N of 0.001% to 0.10%, Cu of 0.1% to 0.50%, Ni of 0.1% to 1.0%, Ti of 0.05% to 0.2%, and V of 0% to 0.2%, with the remainder including iron and inevitable impurities, in which a ratio [Ni]/[Cu] is 0.5 or more, and a total content [Ti]+[V] is 0.085% to 0.30%.
Inventors:
Yosuke Matsumoto
Jun Inada
Chiba Masamichi
Jun Inada
Chiba Masamichi
Application Number:
JP2013004045A
Publication Date:
March 01, 2017
Filing Date:
January 11, 2013
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
C22C38/00; C21D8/06; C21D9/00; C22C38/50; F16B33/06; F16B35/00
Domestic Patent References:
| JP2012017484A | ||||
| JP2002097543A | ||||
| JP2005029870A | ||||
| JP2006291291A | ||||
| JP2007191776A |
Attorney, Agent or Firm:
Kyuichi Ueki
Hisahiko Ueki
Tadashi Sugakawa
Hiroaki Ito
Uemura Junko
Hisahiko Ueki
Tadashi Sugakawa
Hiroaki Ito
Uemura Junko