Benefits of Glass Coating Technology for Forging and Extruding

The glass coating of billets and preforms for forging and extrusion of alloys used in aerospace, medical and industrial applications has a significant influence upon reducing the level of rejects and post forming work, extending tool life and cost savings derived from automation and energy reduction initiatives. The purpose of this paper is to identify key variables in terms of the manufacturing process which will determine the choice of glass chemistry and coating thickness to deliver the aforementioned benefits. The term engineered glass coatings reflects the fact that from practical experience in the majority of cases the process variables are so unique that specific glass chemistries are required to optimize quality and tool life.