Abstract: A strip casting apparatus having a roll shell with a nitrided inner diameter surface mounted on a steel core and method of manufacturing the same. The inner diameter of a steel roll shell may be nitrided by ion or plasma nitriding. The nitriding process can form tight, crack free nitride layer that provides a corrosion resistant barrier and exhibits a surface hardness that is greater than the surface hardness of the steel core and that improves galling resistance while maintaining efficient heat transfer of the roll shell. After nitriding, the roll shell can be shrink fit over a steel core.

Abstract: A strip casting apparatus having a roll shell with a nitrided inner diameter surface mounted on a steel core and method of manufacturing the same. The inner diameter of a steel roll shell may be nitrided by ion or plasma nitriding. The nitriding process can form tight, crack free nitride layer that provides a corrosion resistant barrier and exhibits a surface hardness that is greater than the surface hardness of the steel core and that improves galling resistance while maintaining efficient heat transfer of the roll shell. After nitriding, the roll shell can be shrink fit over a steel core.

Abstract: A method of forming a work piece using a die and a load is provided. The method comprises placing the work piece on a die having a predetermined contour and applying a load on the work piece. The work piece, the die and the load are then heated to an annealing temperature of the work piece such that the work piece, the die and the load are iso-thermal. The method also includes creep forming the work piece such that the work piece develops the predetermined contour during the annealing operation. The work piece, the die and the load are then slow cooled such that the work piece, the die and the load are iso-thermal.