Pulsed Electric Current Sintering of Gas Atomized Ultrahigh Carbon Steel

Juho Lotta, Katri Honkanen, Juha Lagerbom, Simo-Pekka Hannula

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    Results from microstructural study of Pulsed Electric Current Sintering (PECS) of gas-atomized Ultra-High Carbon Steel (UHCS) powder (1.8 % C, 1.8% Al, 1.4 % Cr) are presented. Microstructural characterization, as well as density and hardness measurements, was carried out to evaluate the resulting microstructures and to establish relationships between the processing conditions and the microstructure. In most of the cases, the microstructure featured a fine and uniform carbide structure in a matrix consisting of pearlite. Sintering temperature had the strongest influence over densification and microstructure, while changes in heating rate or the length of the dwell stage only resulted in minor microstructural changes. On the other hand, considerable microstructural changes were achieved by carrying out cyclic heat treatments (post-sintering) by utilizing the PECS equipment. Cyclic heat treatment across the A1 temperature was found to produce high content of very fine carbides.
    Original languageEnglish
    Title of host publicationProceedings
    Subtitle of host publication5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013
    Place of PublicationBremen
    Pages1-6
    Publication statusPublished - 2013
    MoE publication typeNot Eligible
    Event5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013 - Bremen, Germany
    Duration: 23 Sep 201325 Sep 2013

    Conference

    Conference5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013
    Abbreviated titleSDMA 2013
    CountryGermany
    CityBremen
    Period23/09/1325/09/13

    Keywords

    • powder
    • gas atomization
    • SPS

    Fingerprint Dive into the research topics of 'Pulsed Electric Current Sintering of Gas Atomized Ultrahigh Carbon Steel'. Together they form a unique fingerprint.

  • Cite this

    Lotta, J., Honkanen, K., Lagerbom, J., & Hannula, S-P. (2013). Pulsed Electric Current Sintering of Gas Atomized Ultrahigh Carbon Steel. In Proceedings: 5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013 (pp. 1-6).