AVS 47th International Symposium
    Surface Engineering Tuesday Sessions
       Session SE-TuA

Paper SE-TuA3
The Surface Modification of Wear Resistant HSS Cutting Tools with Adapting Engineered Coatings

Tuesday, October 3, 2000, 2:40 pm, Room 201

Session: Surface Engineering: Surface Preparation to Postcoating Surface Finishing
Presenter: G.S. Fox-Rabinovich, McMaster University, Canada
Authors: G.S. Fox-Rabinovich, McMaster University, Canada
A.I. Kovalev, SPRG, Russia
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The friction parameter, wear resistance, phase and chemical compositions, atomic structure of multi-layered surface engineered coating for cutting tools were studied. A number of fine structure analysis methods including AES, SIMS, EELS, EELFS were applied. The surface engineered coatings being investigated was formed by duplex surface treatment technology including ion nitriding of high-speed steel and by hard PVD (Ti, Cr) N coating cathode arc deposition. Top protective layer of the multi-layer coating was formed by lubricant coating consists of Perfluoro-popyethers (PFPEs) with hydroxyl end groups (known by the brand name Z-DOL). This lubricant has the following chemical structure: (HO-CH2-CF2)-(C2F4O)6-(CF2O)290-CF2-CH2OH. Evolution of atomic structure at PFPE was investigated by vibration spectroscopy. Such adapting coating makes it possible significantly - by factor of 2.0-2.5 increase the wear resistance of cutting tools by surface damage prevention during running-in stage of wear. The mechanism of Z-DOL influence on wear phenomenon as a lubricant is discussed.