Title:
ボルト
Document Type and Number:
Japanese Patent JP6427272
Kind Code:
B2
Abstract:
A bolt is provided that has high strength and excellent hydrogen embrittlement resistance characteristics. A bolt according to an embodiment of the present invention consists of, in mass%, C: 0.32 to 0.39%, Si: 0.15% or less, Mn: 0.40 to 0.65%, P: 0.020% or less, S: 0.020% or less, Cr: 0.85 to 1.25%, Al: 0.005 to 0.060%, Ti: 0.010 to 0.050%, B: 0.0010 to 0.0030%, N: 0.0015 to 0.0080%, O: 0.0015% or less, Mo: 0 to 0.05%, V: 0 to 0.05%, Cu: 0 to 0.50%, Ni: 0 to 0.30%, and Nb: 0 to 0.05%, with the balance being Fe and impurities. The bolt satisfies Formula (1) and Formula (2), and has a tensile strength of 1000 to 1300 MPa and satisfies Formula (3). 4.9 ‰¤ 10 C + Si + 2 Mn + Cr + 4 Mo + 5 V ‰¤ 6.1 Mn / Cr ‰¤ 0.55 dissolved Cr / Cr ‰¥ 0.70
Inventors:
Yutaka Neishi
Makoto Kosaka
Naoki Matsui
Senda Senda
Keisuke Chiba
Hideo Kanizawa
Kazuki Aoyama
Shibuya Wako
Ryoko Inagaki
Makoto Kosaka
Naoki Matsui
Senda Senda
Keisuke Chiba
Hideo Kanizawa
Kazuki Aoyama
Shibuya Wako
Ryoko Inagaki
Application Number:
JP2017526346A
Publication Date:
November 21, 2018
Filing Date:
June 27, 2016
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
Aoyama Manufacturing Co., Ltd.
Aoyama Manufacturing Co., Ltd.
International Classes:
C22C38/00; C22C38/54; F16B35/00
Domestic Patent References:
| JP8134586A | ||||
| JP2012233244A | ||||
| JP7278672A | ||||
| JP2007239100A |
Foreign References:
| WO2015083599A1 |
Attorney, Agent or Firm:
Ascend Patent Business Corporation