Abstract
Recently the demands of a performance and environmental treatment for forging lubricant oil have been getting stronger. Especially, in the warm forging which is spread gradually for the purpose of near net shaping or complex shaping, the environmental problem is considerable. Concerning to the lubricant performances of the oil, both of the high lubrication and cooling abilities are required in warm forging. As for the environmental treatment, the harmful gas and sharp smell must be reduced as much as possible. We have developed the new oil contained overbased calcium sulfonate for warm forging to be satisfied with the needs. The results are follows. 1. The smell was much reduced even at 800 ℃ comparison to conventional high performance forging oil which contains Zn-DTP. 2. The forging load decreased about 35 % at 800 ℃ in backward extrusion. 3. The depth of punch wear was reduced about 14 % after 5000 shots.
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