Models of the evolution of the solidification structure of special concast steels as a function of direct thermomechanical treatments
A formulation of the process conditions best suited to produce special steels by direct rolling requires a quantitative knowledge of the macro- and microstructural changes, the mechanical resistance and the hot ductility as they are affected by the solidification structure and the variables (temperature, time, deformation) of the direct thermo-mechanical treatment. The experimentation involved a low alloy steel (0.4C-0.8Mn-1Cr) and an AISI 310S stainless steel (0.05C-26Cr-18Ni). In situ solidification trials were performed on both types of steel, followed by hot deformation at different temperatures. The structural changes and the kinetics of softening under isothermal conditions were evaluated through metallographic investigation on quenched samples, and by means of double-deformation tests. The effect of the thermal history and the as-cast structure on the hot ductility were examined through hot tensile tests performed on samples subjected to cycles typical of the direct rolling process, and of the traditional process of heating and rolling.
Bibliographic Reference: EUR 14128 IT (1992) 78 pp., FS, ECU 10.50
ISBN: ISBN 92-826-3873-1
Record Number: 199210540 / Last updated on: 1994-12-02
Original language: it
Available languages: it