Ni-free alloyed steel powder "FM Series" for high strength sintered compacts with excellent machinability

Shigeru Unami, Yukiko Ozaki, Tomoshige Ono

Research output: Contribution to journalArticle

Abstract

Ni-free alloyed steel powder "FM Series" for high strength sintered compacts with excellent machinability has been developed. FM Series are pre-mixed powder based on a low Mo prealloyed (0.45 mass%) steel powder added with copper, graphite and lubricant for high density compaction. The sintered compacts of FM series provide tensile strength of 600 MPa with mesh-belt sintered condition and tensile strength of 1 000 MPa with mesh-belt sintered and carburized condition, which are equivalent to those of the conventional 4 mass% Ni diffusion- alloyed steel powder. The sintered compacts of FM series provide less than one fifth the tool wear of that of the conventional 4 mass% Ni diffusion-alloyed steel powder. The high strength and excellent machinability are caused by microstructure homogenization of the sintered compacts due to low Mo prealloyed steel powder.

Original languageEnglish
Pages (from-to)71-77
Number of pages7
JournalJFE Technical Report
Issue number16
Publication statusPublished - Mar 1 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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