Continued Evaluation of the Impact of Diamond Film Hardcoatings on the Machiningof Non-Ferrous Materials. Final Report. Volume 1

摘要

The purpose of this program was to improve the substrate preparation anddeposition procedures from Phase 1A of the project to obtain increased turning performance and more reproducibility. Diamond coated inserts in this project exhibited lifetimes 5 to 10 times greater in the same tests as those from Phase 1A. With the proper substrate preparation and diamond deposition conditions, 3 batches of H21 grade C-w class WC/Co inserts were successfully coated in this program. The 3 batches covered the full acceptable range of production substrate properties. These coatings adhered under the same harsh machining conditons previously established in Phase 1A. Under proper processing conditions, failure of the tools was due to wear out of the diamond, not delamination of the film.