1977 Volume 63 Issue 13 Pages 2208-2223
Our experience and study on the refining and solidification in a 40t slab ESR process at Yawata Works and the properties of the rolled heavy plates are reported in this paper.
Inclusions in the ESR ingot are quite small and few. Desulphurization to gaseous phase plays an important role in the total desulphurization of ESR. The deoxidation is discussed form the viewpoint of Al-O equilibrium. In order to obtain hydrogen contents lower than 1 ppm, the control of atmosphere and the use of recycled slag are necessary.
The secondary mist cooling practice has been developed for the prevention of ghost lines in large ESR ingots.
Heavy plates rolled from the ESR ingot show excellent ductility and impact properties to convetional materials.
A high reliability in material properties is secured by the application of ESR process.
