The Use of Coatings That Optimize the Hot Processing of Titanium, Alloyed Steels and High Performance Metals

Coatings are often used to enhance metal forming processes. Various types may be employed to enhance lubrication, minimize scale formation and provide thermal insulation of the workpiece. For example, glass-based coatings are being used in ring rolling as a means to prevent tears and cracks with crack-sensitive metals such as waspalloy and nickel-based alloys. This is achieved by a coating that acts as a thermal blanket and maintains part temperature for a longer period of time. This paper will review the different coating types and the benefits realized when hot forming titanium, nickels and high temperature alloys.