The Ugine-Se´journet patent for glass lubrication of metals extrusion made it possible to extrude steel in large quantities. A cold pad of glass powder inserted between the die and the billet head melts progressively, providing a high viscosity glass film between the die and the metal. The authors propose a theoretical model of the lubrication mechanism: progressive melting, hydrodynamic flow, and stability of the film. The influence of process parameters is discussed and results are compared with experimental measurements.
Theoretical and Experimental Study of the Glass Lubricated Extrusion Process
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Baque´, P., Pantin, J., and Jacob, G. (January 1, 1975). "Theoretical and Experimental Study of the Glass Lubricated Extrusion Process." ASME. J. of Lubrication Tech. January 1975; 97(1): 18–23. https://doi.org/10.1115/1.3452525
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