Comparison of Dry-Film and Zinc-Phosphate Lubricant for Tube Cold Forming
Dry-film and zinc-phosphate (Zn-P) lubricants were compared for potential applications of dry-film lubricant in tube cold forming processes through the twist compression test. Test results showed that the coefficient of friction (m) had no significant difference between Zn-P soap lube and dry-film lube. The lube coating breakdown time is different between Zn-P soap and dry-film lube. A preliminary industrial trial with dry-film coated tube through the cold drawn over a mandrel showed that the tube surface quality is good and comparable with the Zn-P coated tubes.
Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu
Z. Y. Cheng "Comparison of Dry-Film and Zinc-Phosphate Lubricant for Tube Cold Forming", Advanced Materials Research, Vols. 295-297, pp. 2362-2365, 2011