Wear in ultrafine hardmetal mills manufactured by sinter + HIP
Journal
Advances in Powder Metallurgy and Particulate Materials - 2006, Proceedings of the 2006 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2006
Publisher
Metal Powder Industries Federation (MPIF)
Date Issued
2006-12-01
Author(s)
Sánchez-Moreno, José Manuel
Ordóñez, Alejandro
Type
Resource Types::text::conference output::conference proceedings::conference paper
Abstract
Ultrafine WC-Co milling tools were wear-tested in finishing machining conditions. Mills manufactured in the laboratory followed the powder metallurgy route for ultrafine grades. Total density in hardmetal grades of 0.2 and 0.4 μm was achieved through the Sinter + HIP technique. Wear in laboratory mills was compared with wear in coarse and ultrafine grade commercial mills. All mills cutting edges suffered wear mainly in the abrasive and chipping form. Chipping was excessive and peculiar in form in the laboratory mills; a slight presence of the fragile η phase was discovered. Laboratory mills showed similar wear to the commercial coarse grades, and much more than that of commercial ultrafine grades. A lack of toughness is suggested due to a small difference in the WC mean grain size, in the Co mean free path (λ) and in its distribution: homogeneous in laboratory mills and heterogeneous in the commercial ones. ©Metal Powder Industries Federation (MPIF)