Title:
軟窒化用非調質鋼熱間鍛造部品
Document Type and Number:
Japanese Patent JP4556334
Kind Code:
B2
Abstract:
Disclosed is a non-heat treated steel for soft niriding, which can provide forged parts exhibiting equal to or larger than the limit strain at which cracks occur in straightening by bending and equal to or larger than the fatigue strength when compared with the parts of conventional heat treated steel, such as S48C. The non-heat treated steel for soft nitriding consists essentially of, by weight, C: 0.2-0.6%, Si: 0.05-1.0%, Mn: 0.25-1.0%, S: 0.03-0.2%, Cr: up to 0.2%, sol-Al: up to 0.045%, Ti: 0.002-0.01%, N: 0.005-0.025%, and O: 0.001-0.005%; provided that the conditions,are met; the balance being Fe and inevitable impurities; and the structure after hot forging being a mixed structure of ferrite and pearlite.
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Inventors:
Kazuhisa Ishida
Inoue Koichiro
Inoue Koichiro
Application Number:
JP2001025076A
Publication Date:
October 06, 2010
Filing Date:
February 01, 2001
Export Citation:
Assignee:
Daido Steel Co., Ltd.
International Classes:
C22C38/00; C22C38/02; C22C38/04; C22C38/18; C22C38/28; C22C38/60; C23C8/26; C21D7/13
Domestic Patent References:
| JP9003601A | ||||
| JP10046287A | ||||
| JP11062943A | ||||
| JP59157262A | ||||
| JP6025797A | ||||
| JP8092687A |
Attorney, Agent or Firm:
Katsumi Arasaki