An experimental study of the lubrication behavior of A5 glass lubricant by means of the ring compression test

Friction plays a significant role in metal-forming operations. To optimize the deformation process, it is necessary to quantify and evaluate the behavior of the lubricants. Ln this study, the lubrication behavior of A5 glass lubricant was investigated. Ring compression tests were conducted at constant strain rates ranging from 0.05 to 15 s(-1) and at temperatures ranging from 750 to 1000 degrees C. At temperatures lower than 950 degrees C, the strain rate has no obvious effect on the friction factor of A5, the most significant parameter being the temperature, an increase in the temperature decreases the friction factor m to reduce. At BS temperatures above 950 degrees C, the effect of strain rate becomes important, the friction factor m increases with the decrease in the strain rate. (C) 2000 Published by Elsevier Science S.A. All rights reserved.