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    Volume 3, Issue 4 (December 2014)

    Special Issue Paper

    Large Forgings: Microstructural Evolution and Residual Stresses Due to Quenching Treatments—A Combined Numerical and Experimental Approach

    (Received 21 November 2013; accepted 7 March 2014)

    Published Online: 31 December 2014

    CODEN: MPCACD

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    Abstract

    Based on numerical and experimental data, an FEM model was implemented to simulate quench treatments on large forging components. After experimental validation of convection coefficient laws between water and component surface, time–temperature curves were determined for a large forged piece for different corss section of the component itself. Then superimposing these curves to the continuous cooling transformation diagram for the material, it was possible to identify the microstructural constituents of the steel after quenching. The component residual stress field was obtained by implementing the volumetric expansion law due to the phase transition during cooling. The ability to simulate the heat treatment of heavy size parts must be considered very useful due to quickly managing of all variables that govern the problem (initial and final temperatures, holding times, quenching mode, size, and geometry of components) and the possibility to predict final characteristics of the workpiece.


    Author Information:

    Boniardi, Marco
    Politecnico di Milano, Dipartimento di Meccanica, Milano,

    Guagliano, Mario
    Politecnico di Milano, Dipartimento di Meccanica, Milano,

    Casaroli, Andrea
    Politecnico di Milano, Dipartimento di Meccanica, Milano,

    Andreotti, Riccardo
    Politecnico di Milano, Dipartimento di Meccanica, Milano,

    Ballerini, Filippo
    Politecnico di Milano, Dipartimento di Meccanica, Milano,


    Stock #: MPC20130089

    ISSN:2165-3992

    DOI: 10.1520/MPC20130089

    Author
    Title Large Forgings: Microstructural Evolution and Residual Stresses Due to Quenching Treatments—A Combined Numerical and Experimental Approach
    Symposium ,
    Committee A01