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    A Ferritic-Pearlitic Steel with Eutectoid Composition

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    By alloy design based on demands for formability and high martensitic hardness, a new high-carbon, low-alloy steel has been developed. The steel, which minimizes the use of all elements except carbon and molybdenum, exhibits a microstructure and properties normally not attained in high-carbon steels. On retarded cooling, the steel, which has eutectoid composition, generates substantial amounts of pro-eutectoid ferrite in combination with a coarse, degenerated pearlite. The pro-eutectoid is not ferrite, but an eutectoid itself composed of nanometer-sized, evenly distributed molybdenum carbides and ferrite.

    The new steel provides a soft and formable structure in the as-rolled condition, and hardens to high martensitic hardness at austenitization conditions equal to those used for high-carbon, low-alloy steels.


    high-carbon steels, low-alloy steels, formability, hardenability, alloy design, pearlite reactions, degenerated pearlite

    Author Information:

    Andersson-Drugge, I-M
    Ovako Metech AB, Hofors,

    Lund, T
    Ovako AB, Danderyd Stockholm,

    Committee/Subcommittee: A01.28

    DOI: 10.1520/STP24833S