New composite-type alloyed 2%Ni-1%Mo steel powder for ultrahigh-strength sintered components

Osamu Furukimi, Koji Yano, Shigeaki Takajo

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

7 Citations (Scopus)

Abstract

The compacts made from a newly developed composite-type alloyed steel powder with 2%Ni and 1%Mo show superior mechanical properties after heat treatment. The case-hardened compacts show tensile strength of 1500MPa, absorbed energy of 21J, rotating bending fatigue strength of 460MPa and contact fatigue strength of 2560MPa. All of them exceed the corresponding values of the compacts made from a conventional 4%Ni-0.5%Mo-1.5%Cu steel powder, which are 1380MPa, 20J, 410MPa and 2430MPa, respectively. Double-pressed, double-sintered, bright-quenched and tempered compacts made from the new powder show ultrahigh tensile strength of 1920MPa with considerably high absorbed energy of 53J. The extraordinary strengthening is attributed to the strain-induced transformation of Ni-rich austenite to martensite. The sintered and heat-treated compacts made from the new powder contain a sufficient amount of austenite which transforms almost completely to martensite during loading.

Original languageEnglish
Title of host publicationP/M Materials
Editors Anon
PublisherPubl by Metal Powder Industries Federation
Pages59-67
Number of pages9
Volume5
ISBN (Print)1878954121
Publication statusPublished - 1991
Externally publishedYes
EventProceedings of the 1991 Powder Metallurgy Conference and Exhibition - Chicago, IL, USA
Duration: Jun 9 1991Jun 12 1991

Other

OtherProceedings of the 1991 Powder Metallurgy Conference and Exhibition
CityChicago, IL, USA
Period6/9/916/12/91

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Metals and Alloys

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  • Cite this

    Furukimi, O., Yano, K., & Takajo, S. (1991). New composite-type alloyed 2%Ni-1%Mo steel powder for ultrahigh-strength sintered components. In Anon (Ed.), P/M Materials (Vol. 5, pp. 59-67). Publ by Metal Powder Industries Federation.