An analysis of cooling curve accompanying phase transformation for various diameters of steel.

Abstract

Analytical techniques for the prediction of cooling curves by quenching of steel are reported. The nonlinear transient heat conduction problem including heat of phase transformation and transient boiling of water at the surface of a cylindrical specimen is analyzed numerically. In this report, the authors' former reports are extended to calculate cooling curves inside of a specimen up to 300mm. Calculated cooling curves clearly show dependency on latent heat of phase transformation and correspondence to reference data by the continuous-cooling-transformation diagram (CCT diagram).