Title:
CARBONITRIDED COMPONENT
Document Type and Number:
Japanese Patent JP2017171970
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a carbonitrided component having excellent bending fatigue strength and pitching strength.SOLUTION: The carbonitrided component has a core part containing, by mass%, C:0.10 to 0.30%, Si:0.01 to 1.40%, Mn:1.40 to 3.00%, P:0.030% or less, S:0.060% or less, Cr:0.01 to 0.50%, Al:0.010 to 0.100%, N:0.003 to 0.030% and the balance Fe with inevitable impurities. Carbon concentration CP1 is 0.70 to 0.89% and nitrogen concentration is 0.10 to 0.80% in an area by a depth of 0.05 mm from a flat part. Carbon concentration CP2 in an area by a depth of 0.05 mm from an edge part is higher than the carbon concentration CP1 and 1.20% or less. Vickers hardness at a position of a depth of 0.3 mm from the flat part is HV650 or more. Particle boundary oxidation layer depth of the surface part is less than 3.0 μm. Vickers hardness of the core part is HV260 or more.SELECTED DRAWING: Figure 3
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Inventors:
TODO SHOJI
IWAHASHI TAKANORI
IMATAKA HIDEKI
SUENO HIDEKAZU
IWAHASHI TAKANORI
IMATAKA HIDEKI
SUENO HIDEKAZU
Application Number:
JP2016057671A
Publication Date:
September 28, 2017
Filing Date:
March 22, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP
International Classes:
C22C38/00; C22C38/60
Domestic Patent References:
| JP2012072462A | 2012-04-12 | |||
| JP2014177668A | 2014-09-25 | |||
| JP2012117102A | 2012-06-21 | |||
| JP2007291486A | 2007-11-08 | |||
| JP2011006734A | 2011-01-13 | |||
| JP2007308792A | 2007-11-29 |
Foreign References:
| US5746842A | 1998-05-05 |
Attorney, Agent or Firm:
Ascend Patent Business Corporation