Fatigue strength of sintered and super rapid induction heated and quenched (SRIQ) compacts made of Mo prealloyed steel powder

Shigeru Unami, Yukiko Ozaki, Yoshitaka Misaka, Kengo Fukazawa

Research output: Contribution to journalArticle

Abstract

The fatigue strength of the sintered and super rapid induction heated and quenched (SRIQ) compact made of the 0.6mass% Mo-0.2 mass%Mn prealloyed steel powder has been investigated. As the effective case depth in the SRIQ material decreased, fatigue strength increased, and reached to 400MPa equivalent to two times of the carburized material in the case of 1 mm of the effective case depth. Moreover, fatigue strength of 500 MPa was obtained by double SRIQ treatment, in which specimens was quenched to the center region in the first SRIQ, and to 1 mm of the effective case depth in the subsequent treatment. The improvement in the fatigue strength can be considered to result from not only the high compressive residual stress but also the fine prior austenite grain.

Original languageEnglish
Pages (from-to)141-145
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume60
Issue number4
DOIs
Publication statusPublished - Apr 1 2013
Externally publishedYes

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Steel
Powders
Compressive stress
Austenite
Residual stresses
Fatigue of materials
Fatigue strength

All Science Journal Classification (ASJC) codes

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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abstract = "The fatigue strength of the sintered and super rapid induction heated and quenched (SRIQ) compact made of the 0.6mass{\%} Mo-0.2 mass{\%}Mn prealloyed steel powder has been investigated. As the effective case depth in the SRIQ material decreased, fatigue strength increased, and reached to 400MPa equivalent to two times of the carburized material in the case of 1 mm of the effective case depth. Moreover, fatigue strength of 500 MPa was obtained by double SRIQ treatment, in which specimens was quenched to the center region in the first SRIQ, and to 1 mm of the effective case depth in the subsequent treatment. The improvement in the fatigue strength can be considered to result from not only the high compressive residual stress but also the fine prior austenite grain.",
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AU - Fukazawa, Kengo

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