The Investigation on Solidification Parameters and Operating Parameters of 10 Ton ESR Ingot

The work roll, with a 610mm diamter and 1700mm length, is a very important comsumptive section in cold rolling mill.High strength and toughness,high and homogeneous hardness are required for it.Ten ton 86CrMoV7 ingot forged into the work roll is producted on F850/10-Ⅱ electroslag fur nace.
It has been proved that reasonable process of E.S.R.is a key to get excellent qualites.In order to improve the ingot qualities and practical electroslag remelting, the investigation are carried out on solidification parameters,such as secondary dendritic arm spacing,temperature gradient, local cooling solidification time,and width of mushy zone.In addition, the relationship between the solidification parameters and crystal structures is investigated as well.