Estimation of Frictional Property of Lubricants for Hot Forging of Steel Using Low-speed Ring Compression Test

Abstract

Development of high performance lubricants for hot forging of steel has been strongly needed to expand die life and to improve working environment at factories. Thereupon, graphite lubricants have been altered into non-graphite lubricants in hot forging of simple parts. However, these non-graphite lubricants have insufficient property. In this paper, low-speed ring compression test was proposed to estimate the frictional property of lubricants for hot forging of steel. It was found that each lubricant has critical temperature less than 450 ˚C to reduce the friction between the dies and the 1000 ˚C billet.