Experimental Study on Milling QT450 Ductile Iron with PCBN Blade
In order to investigate the performance of PCBN milling cutter blades for milling ductile iron,milling tests are conducted on ferritic ductile iron(QT450-10)with ceramic bonded PCBN milling cutter blades(T-PCBN)and metal bonded PCBN milling cutter blades(J-PCBN),where the milling force,vibration,wear mechanism and service life of the two milling cutter blades are comparatively studied.The results demonstrate that the milling force and vibration of T-PCBN blades are inferior to those of J-PCBN milling cutter blades on the basis of the identical cutting parameters,whereas both blades are subject to adhensive,diffusion,oxidation and abrasive wear.Meanwhile,the primary form of failure for T-PCBN milling cutter blades is breakage of cutting edge,while the failure form for J-PCBN milling cutter blades is wear until the standard of dullness is reached.Furthermore,the service life of J-PCBN milling cutter blades is much superior to that of T-PCBN milling cutter blades.
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