Title:
CARBURIZED COMPONENT OR CARBO-NITRIDED COMPONENT MADE OF STEEL
Document Type and Number:
Japanese Patent JP2008057017
Kind Code:
A
Abstract:
To provide a carburized component or a carbo-nitrided component made of steel having satisfactory facial fatigue strength.
In the carburized component or carbo-nitrided component made of steel, the maximum height roughness Rz of a roughness curve is 6 to 10 m, and, based on the average line of the roughness curve, in the case, when (the average line+1 m) is exceeded after the exceeding of the average line is defined as one peak, the number of the peaks is 5 pieces/mm, and also, the Vickers hardness of the surface layer part is 800. Preferably, the structure of the surface layer part is a mixed structure of martensite and retained austenite, and it has a suitable steel composition.
Inventors:
OFUJI YOSHIHIRO
HORIMOTO MASAYUKI
HORIMOTO MASAYUKI
Application Number:
JP2006237300A
Publication Date:
March 13, 2008
Filing Date:
September 01, 2006
Export Citation:
Assignee:
SUMITOMO METAL IND
International Classes:
C22C38/00; C22C38/60; C21D7/06; C21D8/00
Domestic Patent References:
JPH07242994A | 1995-09-19 | |||
JP2001059565A | 2001-03-06 | |||
JPH04180516A | 1992-06-26 |
Attorney, Agent or Firm:
Mikiji Sugioka
Terutada Hogami
Terutada Hogami