Three heats of 0.40% carbon microalloyed steel, containing either 0.03 % or 0.10% sulfur, and with and without a 0.09% vanadium addition, were subjected to metallographic analysis and mechanical property testing. Bars were heated to austenitizing temperatures, between 1000°C and 1300°C. Significant amounts of intragranular ferrite, which has been associated with improved toughness, formed only in specimens containing vanadium and high sulfur which were austenitized above 1100°C. The balance of the microstructure consisted of ferrite which formed at prior austenite grain boundaries and large amounts of pearlite. High densities of manganese sulfide particles in the steels with high sulfur content effectively retarded austenite grain growth. The formation of significant amounts of intragranular ferrite decreased mean free ferrite spacing, effectively refined the pearlite structure, and lowered the Charpy V-notch impact transition temperature.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effect of Sulfur on Microstructure and Properties of Medium-Carbon Microalloyed Bar Steels


    Additional title:

    Sae Technical Papers


    Contributors:
    Kirby, B.G. (author) / Van Tyne, C.J. (author) / Matlock, D.K. (author) / Krauss, G. (author) / LaGreca, P. (author)

    Conference:

    International Congress & Exposition ; 1992



    Publication date :

    1992-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Effect of sulfur on microstructure and properties of medium-carbon microalloyed bar steels

    Kirby,B.G. / LaGreca,P. / Tyne,C.J.van et al. | Automotive engineering | 1992


    Effect of forging parameters in the microstructure and properties of medium carbon microalloyed steels

    Vedhanayagam,A. / Shivpuri,R. / Ohio State Univ.,US | Automotive engineering | 1993



    Research and Development of Microalloyed Medium Carbon Steels

    Machida, Isao / Uyehara, Norioki / Niwa, Sukehisa et al. | SAE Technical Papers | 1981


    Research and development of microalloyed medium carbon steels

    Niwa,S. / Machida,I. / Kato,T. et al. | Automotive engineering | 1981