Nanotribology Application in the Coining Industry (II) - Optimization of Lubricant Film Formation on Blanks
Tsi-Neng Ying, Richard S. Gates
A new method has been developed to lubricate metal coin blanks during the coin production process. The lubricant is formed on the metal surfaces as a monomolecular film during burnishing which provides an exceptional combination of chemical and tribological environments needed to promote reaction. Laboratory scale burnishing simulations combined with surface analysis has indicated the composition and nature of the films formed. Comparison of reactions on metal surfaces with and without burnishing has confirmed the importance of the tribolochemical process to the successful lubrication of the blanks. Implementation of this lubrication procedure to production lines has improved the surface quality of the coins and tripled the die life, resulting in considerable cost savings.
and Gates, R.
Nanotribology Application in the Coining Industry (II) - Optimization of Lubricant Film Formation on Blanks, Tribology Transactions, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=913505
(Accessed December 4, 2023)