Fatigue strength of sintered and carburized compacts made of molybdenum hybrid-alloyed steel powder

Shigeru Unami, Yukiko Ozaki, Satoshi Uenosono

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The fatigue strength of the sintered and carburized compact made of the Mo hybrid-alloyed steel powder, which is based on a 0.6mass%Mo prealloyed steel powder to which 0.2mass%Mo powder particles have been diffusion bonded, is higher than that of the 0.6mass%Mo prealloyed steel powder. The sintered compact made of the Mo hybrid-alloyed steel powder has a finer pore structure than that of the Mo prealloyed steel powder, because the Mo-rich region near the surface of the Mo hybrid-alloyed steel powder should exist as the α-iron phase with a high diffusion coefficient at high temperature and result in enhanced sintering. Improvement in the fatigue strength of the sintered and carburized compact made of the Mo hybrid-alloyed steel powder should result from not only the fine pore structure but also the strengthening of the sintering neck by Mo concentration around pores.

Original languageEnglish
Pages (from-to)519-524
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume54
Issue number7
DOIs
Publication statusPublished - Jul 1 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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