Title:
STEEL HAVING EXCELLENT MACHINABILITY AND TWISTING FATIGUE STRENGTH
Document Type and Number:
Japanese Patent JP2010209368
Kind Code:
A
Abstract:
To provide a material for machine structures which is excellent in machinability and twisting fatigue strength, and also is excellent in grooving to a steel and twisting fatigue strength after induction hardening.
The composition of the steel is limited to the one containing 0.35 to 0.48% C, >0.36 to <0.40% Si, 0.2 to 1.0% Mn, ≤0.025% P, ≤0.02% S, <0.03% Ti, >0.06 to <0.2% Al, 0.15 to <0.5% Cr, >0.005 to 0.008% N, ≤0.0030% O, 0.0002 to 0.0025% B and 0.0005 to 0.003% Sb, and the balance Fe with inevitable impurities.
COPYRIGHT: (C)2010,JPO&INPIT
Inventors:
HIRAI YASUMASA
UEI SEISHI
KIMURA HIDETO
UEI SEISHI
KIMURA HIDETO
Application Number:
JP2009053617A
Publication Date:
September 24, 2010
Filing Date:
March 06, 2009
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
C22C38/00; C22C38/32; C22C38/60
Domestic Patent References:
| JP2005054216A | 2005-03-03 | |||
| JP2009221497A | 2009-10-01 | |||
| JP2009228075A | 2009-10-08 |
Foreign References:
| WO2008084749A1 | 2008-07-17 |
Attorney, Agent or Firm:
Eiichi Kobayashi