Development of molybdenum hybrid-alloyed steel powder for high fatigue strength sintered parts

Shigeru Unami, Yukiko Ozaki, Tsutomu Ushirozako, Hitoshi Tanino

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A new molybdenum hybrid-alloyed steel powder has been developed. This powder gives sintered parts with improved fatigue strength by a conventional belt furnace sintering. 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-iron phase) with a high diffusion coefficient is formed in the sintering necks where molybdenum is concentrated resulting in enhanced sintering. This developed powder has already been applied as a raw material of a high strength part for automotive engines with advantages of sintering cost, productivity improvement and enhanced flexibility in manufacturing process. This powder also gives an advantage over the conventional diffusion-alloyed steel powder in terms of raw material cost reduction.

Original languageEnglish
Pages (from-to)341-347
Number of pages7
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume57
Issue number5
DOIs
Publication statusPublished - May 1 2010

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Molybdenum
Steel
Powders
Sintering
Raw materials
Fatigue strength
Pore structure
Cost reduction
Furnaces
Iron
Productivity
Engines

All Science Journal Classification (ASJC) codes

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

Cite this

Development of molybdenum hybrid-alloyed steel powder for high fatigue strength sintered parts. / Unami, Shigeru; Ozaki, Yukiko; Ushirozako, Tsutomu; Tanino, Hitoshi.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 57, No. 5, 01.05.2010, p. 341-347.

Research output: Contribution to journalArticle

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