Hyper-Carbide Cutting Tools - SME（Hyper-Carbide刀具中小企业）.pdf

Hyper-Carbide Cutting Tools Shaiw-Rong (Scott) Liu Overview/Introduction • Introduction to Hyper-Carbide Material • Production Methods • Material Properties – Test Results • “One-Pass” Machining • Machining Test Results • Advantages of Hyper-Carbide • Next Steps / Conclusion The Challenges for Cutting Tools • High-Speed Machining • Machining of Hard and High-Temperature Materials • Complex Cutter Geometry • Current tool materials – Traditional WC-Co; sub-micrograin WC – SiC -Al O and other ceramics w 2 3 – CBN and PCD Newly Invented Materials • Dr. Scott Liu has invented more than 30 families of materials • More than 200 grades • 4 US Patents 6,911,063, 7,354,548, 7,645,315 and 7,857,188 • Multiple US and worldwide patents pending • Conventional powder process Conventional Powder Process Mixed Powder (WC, binder, etc) Cold Press 5-15 tons/in2 (extrude or injection mold also) Vacuum Sinter 1300-2500 ºC Temp Standard HIP + Pressure Opt: Grind Principles of the Invention • Metal Matrix Composite = Metal + Ceramic – E.g., Co-WC (1923) – Ni-Mo2C-TiC (1929) – Co-TaC-WC, Co-TiC-TaC (1931) – Co-TiC-TaC-WC (1932) • P = Avg (P , P ,. . .P ) C 1 2 n • Composite design based on properties requirements of application • Discovery of compatible metal and ceramic Achievements • Several compatible alloys were discovered • Some new materials have one or more unprecedented properties, i.e., Hard