Title:
STEEL AND STEEL PRODUCT HAVING EXCELLENT MACHINABILITY AND FATIGUE PROPERTY AND METHOD FOR PRODUCING THEM
Document Type and Number:
Japanese Patent JP2006028598
Kind Code:
A
Abstract:
To provide a steel having satisfactory machinability while securing its fatigue strength, and to provide a steel having further improved fatigue strength actually by induction hardening.
The steel has a composition comprising by mass% that C: 0.3 to 0.7%, Si: 1.1% or less, Mn: 0.2 to 1.1%, Mo: 0.05 to 0.6%, S: 0.06% or less, P: 0.025% or less, Al: 0.25% or less, Cr: 0.3% or less and the balance Fe and inevitable impurities, has a base material structure of ferrite structure and a pearlite structure, wherein the structural fraction of the sum of the ferrite structure and the pearlite structure accounts for 90 volume% or more, and the ferrite structure has the maximum thickness of 30 μm or less.
Inventors:
MATSUZAKI AKIHIRO
HAYASHI TORU
OMORI YASUHIRO
TOYOOKA TAKAAKI
KUROSAWA NOBUTAKA
YAMADA KATSUMI
HAYASHI TORU
OMORI YASUHIRO
TOYOOKA TAKAAKI
KUROSAWA NOBUTAKA
YAMADA KATSUMI
Application Number:
JP2004210398A
Publication Date:
February 02, 2006
Filing Date:
July 16, 2004
Export Citation:
Assignee:
JFE STEEL KK
International Classes:
C22C38/00; C21D8/00; C21D9/28; C22C38/22; C22C38/60
Domestic Patent References:
| JP2002069566A | 2002-03-08 | |||
| JPH08311615A | 1996-11-26 | |||
| JPH08127844A | 1996-05-21 | |||
| JPH11236644A | 1999-08-31 |
Attorney, Agent or Firm:
Kosaku Sugimura
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