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Title:
摩擦材用鋼製裏金および鋼製品の製造方法
Document Type and Number:
Japanese Patent JP5044712
Kind Code:
B1
Abstract:
To provide a steel product excelling in both corrosion resistance and adhesion. A steel product having a nitride layer and a nitrogen diffused layer formed on the surface of a steel base material is provided. The nitride layer includes a first compound layer formed on a nitrogen diffused layer side and a second compound layer formed on a surface side of the first compound layer. The first compound layer has an ε-structure mainly made of Fe3N, and the second compound layer has a higher nitrogen concentration than the first compound layer and has a concavoconvex formed on the surface thereof. Thus, the nitride layer having excellent adhesion, an extremely small carbon containing amount, and high corrosion resistance can be formed.

Inventors:
Koji Nishikawa
Nao Fujikawa
Takashi Watanabe
Hideaki Iwamura
Morihiro Fujita
Application Number:
JP2011140054A
Publication Date:
October 10, 2012
Filing Date:
June 24, 2011
Export Citation:
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Assignee:
Air Water Inc.
International Classes:
C23C8/26; C21D1/06; C21D1/76; C21D7/06; C21D9/00; C23C8/02; C23C8/80; F16D65/092; F16D69/04
Domestic Patent References:
JP2002130409A
JP2011011032A
JP64079362A
JP5346129A
Attorney, Agent or Firm:
Naoyuki Morimoto