Cutting Characteristics and Surface Integrity in Drilling of Powder Metallurgy Nickel-based Superalloy FGH97

FGH97 is a new generation of powder metallurgy superalloy, and it is finding its application in the industry. In this work, drilling experiments of FGH97 using coated carbide tool were conducted at different cutting speeds and feed rates, and FEM simulations under the same drilling conditions were also done using Advantedge. The results revealed that FGH97 should be drilled at a cutting speed of less than 20 m/min. The cutting forceand cutting temperature increased with the increase of cutting speed and feed rate. Surface roughness of drilling of FGH97 was affected mainly by cutting speed, rather than feed rate And high cutting temperature was benefitial for reducing roughness. Work hardening was severe when drilling FGH97, and low cutting speed was beneficial to increase work hardening. (C) 2018 The Authors. Published by Elsevier Ltd.