Title:
機械部品およびその製造方法
Document Type and Number:
Japanese Patent JP4230794
Kind Code:
B2
Abstract:
A mechanical component 1 composed of a steel is surface-hardened by nitriding, and specifically has a surficial layer 2 raised in the surface hardness by the nitriding, and an inner portion 3 not affected by the nitriding and showing a nearly constant hardness. Vickers hardness of the inner portion 3 is adjusted to 190 to 260 HV, Vickers hardness of the surficial portion 2 measured at a reference position corresponded to a 50 mu m depth from the component surface is adjusted to 340 to 460 HV, and effective depth of hardened layer measured from the component surface 4, where a Vickers hardness of 270 HV is achieved, is adjusted to 0.3 mm or more. This makes it possible to provide a mechanical component which is composed of a steel and surface-hardened by nitriding, and is successfully improved in the strength and bending straightening property, and also to provide a method of fabricating the same.
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Inventors:
Inoue Koichiro
Yutaka Kurebayashi
Yasushi Matsumura
Hideki Matsuda
Takashima Mitsuo
Yutaka Kurebayashi
Yasushi Matsumura
Hideki Matsuda
Takashima Mitsuo
Application Number:
JP2003037802A
Publication Date:
February 25, 2009
Filing Date:
February 17, 2003
Export Citation:
Assignee:
Daido Steel Co., Ltd.
Honda motor industry stock company
Honda motor industry stock company
International Classes:
C23C8/26; C21D1/06; C21D9/30; C22C38/00; C22C38/02; C22C38/04; C22C38/42; C22C38/58; C22C38/60; C23C8/32; C23C8/50
Domestic Patent References:
| JP11269631A | ||||
| JP4285152A | ||||
| JP7018379A | ||||
| JP9279295A | ||||
| JP7252589A | ||||
| JP8092723A | ||||
| JP2002020854A | ||||
| JP2003236674A |
Attorney, Agent or Firm:
Masanori Sugawara