Rolling contact fatigue property of sintered and carburized compacts made of molybdenum hybrid-alloyed steel powder

Shigeru Unami, Yukiko Ozaki, Satoshi Uenosono

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

A new molybdenum hybrid-alloyed steel powder has been developed. The powder is based on a molybdenum prealloyed steel powder to which molybdenum powder particles have been diffusion bonded. The sintered compact made of the developed powder has a finer pore structure than that of the conventional molybdenum prealloyed steel powder, because the ferritic iron phase (α-phase) with a high diffusion coefficient is formed in the sintering necks where molybdenum is concentrated resulting in enhanced sintering. The rolling contact fatigue strength of the sintered and carburized compacts made of this powder improved by a factor of 3.6 compared with that of the conventional molybdenum prealloyed steel powder. The improvement in the rolling contact fatigue strength should result from the fine pore structure without coarse pores acting as stress concentration points.

Original languageEnglish
Title of host publicationProgress in Powder Metallurgy - Proceedings of the 2006 Powder Metallurgy World Congress and Exhibition (PM 2006)
Pages713-716
Number of pages4
Volume534-536
EditionPART 1
Publication statusPublished - 2007
Externally publishedYes
Event2006 Powder Metallurgy World Congress and Exhibition, PM 2006 - Busan, Korea, Republic of
Duration: Sep 24 2006Sep 28 2006

Publication series

NameMaterials Science Forum
NumberPART 1
Volume534-536
ISSN (Print)02555476

Other

Other2006 Powder Metallurgy World Congress and Exhibition, PM 2006
CountryKorea, Republic of
CityBusan
Period9/24/069/28/06

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Unami, S., Ozaki, Y., & Uenosono, S. (2007). Rolling contact fatigue property of sintered and carburized compacts made of molybdenum hybrid-alloyed steel powder. In Progress in Powder Metallurgy - Proceedings of the 2006 Powder Metallurgy World Congress and Exhibition (PM 2006) (PART 1 ed., Vol. 534-536, pp. 713-716). (Materials Science Forum; Vol. 534-536, No. PART 1).