Title:
真空浸炭用鋼材及びその製造方法
Document Type and Number:
Japanese Patent JP6301694
Kind Code:
B2
Abstract:
The purpose of the present invention is to obtain: a carburized component having sufficient surface fatigue strength, moreover a carburized component having surface fatigue strength and bending fatigue strength; and a steel material for obtaining the carburized component. The present invention is a steel material for vacuum carburizing, which contains C, Si, Mn, S, P, Cr, Mo, V, Al and N, and wherein vanadium carbide has an average circle-equivalent diameter of 25 nm or less. The present invention also includes a method for producing the steel material, and specifically provides a method for producing a steel material for vacuum carburizing, wherein a mass of steel having a predetermined chemical composition is maintained at 1,200°C or higher for 30-300 minutes and slabbed, and then is subjected to hot rolling, while setting the heating temperature before hot rolling to 950°C or higher and setting the heating retention time before hot rolling to 30 minutes to 5 hours.
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Inventors:
Kaizuka Masaki
Shindo Yosuke
Okamoto Shirou
Shindo Yosuke
Okamoto Shirou
Application Number:
JP2014060210A
Publication Date:
March 28, 2018
Filing Date:
March 24, 2014
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
C22C38/00; C21D1/06; C21D7/06; C21D8/06; C21D9/32; C22C38/34
Domestic Patent References:
| JP2006183095A | ||||
| JP2003193137A | ||||
| JP4201128A |
Attorney, Agent or Firm:
Takuji Yamada
Norihito Yamao
Noriko Cauldron
Masahiro Sasaki
Norihito Yamao
Noriko Cauldron
Masahiro Sasaki
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