Title:
耐ねじり疲労特性に優れた電縫鋼管及びその製造方法
Document Type and Number:
Japanese Patent JP5845623
Kind Code:
B2
Abstract:
Conventional electric resistance welded steel pipes cannot always ensure fatigue resistance required as drive shafts. In detail, a base material portion of an electric resistance welded steel pipe has a composition including C at 0.25 to 0.55%, Si at 0.01 to 1.0%, Mn at 0.2 to 3.0%, Al at not more than 0.1% and N at 0.0010 to 0.0100%, with the balance being represented by Fe and inevitable impurities, and the weld defect area, which is a projected area of a weld defect in an electric resistance weld zone, is less than 40000 µm 2 .
Inventors:
Masatoshi Aratani
Yoshikazu Kawabata
Okabe Nochi
Kozo Iizuka
Hiromichi Hori
Gunji Makio
Kenichi Iwasaki
Yoshikazu Kawabata
Okabe Nochi
Kozo Iizuka
Hiromichi Hori
Gunji Makio
Kenichi Iwasaki
Application Number:
JP2011106941A
Publication Date:
January 20, 2016
Filing Date:
May 12, 2011
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C22C38/00; B21C37/08; B21C51/00; B23K13/00; B23K31/00; C22C38/14; C22C38/58; F16C3/02
Domestic Patent References:
| JP2007262469A | ||||
| JP2007270349A | ||||
| JP2008240145A |
Attorney, Agent or Firm:
Kenichiro Ochiai
Eiichi Kobayashi
Eiichi Kobayashi