CARBURIZED COMPONENT SUPERIOR IN LOW CYCLE FATIGUE CHARACTERISTIC

Title:

CARBURIZED COMPONENT SUPERIOR IN LOW CYCLE FATIGUE CHARACTERISTIC

Document Type and Number:

Japanese Patent JP2008255470

Kind Code:

A

Abstract:

To improve both of tooth flank strength and low cycle fatigue strength of the root of tooth, which are required for deferential gear (a carburized component).

The carburized component comprises 0.10 to less than 0.30% C, 0.10% or less Si, 0.20-0.60% Mn, 0.015% or less P, 0.035% or less S, 0.50-1.00% Cr, 0.50-1.00% Mo, 0.0005-0.0030% B, 0.010-0.100% Ti, 0.010-0.100% Nb and balance Fe with inevitable impurities; has a surface layer C concentration after gas carburization treatment of 0.40-0.60%, an effective hardened layer depth of 0.6-1.2 mm defined by limit hardness of 513 HV, and a surface hardness after shot peening treatment of 700 HV or higher.

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Inventors:

OKADA YOSHINARI
AMANO MASAKI
OTA IBUKI
MATSUMURA KOJI
MIYAZAKI TAKAHIRO

Application Number:

JP2008037429A

Publication Date:

October 23, 2008

Filing Date:

February 19, 2008

Export Citation:

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Assignee:

HONDA MOTOR CO LTD
DAIDO STEEL CO LTD

International Classes:

C22C38/00; C21D1/06; C21D7/06; C21D9/32; C22C38/32; C23C8/22

Domestic Patent References:

JP2006152330A	2006-06-15
JP2007231305A	2007-09-13

Attorney, Agent or Firm:

Masanori Sugawara

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