For heat-resistant super alloys, the cutting speed of carbide milling cutters is approx. 50m/min. Ceramic milling cutters offer a different approach, with cutting speeds of up to 1,000m/min. The range of applications of ceramic cutting tool materials includes nickel-based, cobalt-based and iron-based heat-resistant alloys in the ISO S group. Typical alloys are for example Inconel 718, René 80, Nimonic 80A, Haynes 556, Mar-M-247 and Stellite 31. These heat-resistant super alloys (HRSAs) are the preferred choice for the use in the hot section of aircraft engines.
Cutting tool specialist, Walter AG explains how the machining of heat-resistant super alloys can be achieved with the same feed rates as aluminium. Walter’s aerospace component manager, Stefan Benkóczy reports.
The high volume of orders in the aviation industry places great pressure on the capacity of engine manufacturers and their suppliers. Therefore, a reduction in component machining times would be highly beneficial. For heat-resistantContinue reading