Experimental Research in High Efficiency Milling of Powder Metallurgy Superalloy

High efficiency dry face milling experiments on powder metallurgy superalloy, were conducted using coated carbide tools. The approach to prolong the service life of the TiAlN-TiN coated carbide tool in milling powder metallurgy superalloy is presented. By the use of SEM and energy spectrometer, the wear morphology and mechanisms of rake face and flank wear of carbide tools are investigated. Experimental results indicate that under the conditions, the primary wear mechanisms of coated carbide tools are abrasive, adhesion and fatigue failure; the wearing modes are break and spalling in the rake face.