Title of Paper:Influence of grain wear on material removal behavior during grinding nickel-based superalloy with a single diamond grain

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Affiliation of Author(s):机电学院

Journal:INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE

Key Words:Single diamond grain Material removal Grinding force Wear Pile-up

Abstract:In order to explore the effect of grain wear on material removal behavior during grinding nickel-based superalloy Inconel 718, the grinding experiment with a single diamond grain was carried out. The variations of grain wear, grinding force and force ratio, and pile-up ratio were investigated under the conditions of undeformed chip thickness (UCT) ranging from 0.2 to 1 mu m. The results show that a critical UCT valve, such as 0.3 mu m, could be determined according to the pile-up ratio and could also be used to quantify the material removal process. The wear behavior of a diamond grain shows four types, such as crescent depression on the rake face, abrasion on the flank face, grain micro-fracture, and grain macro-fracture. Furthermore, these classifications are determined by the dwell time of rubbing, ploughing and cutting at different UCT values applied. The grinding force ratio increases with increasing of the negative rake angle of a diamond grain. In the rubbing and ploughing stages, the material removal efficiency is proportional to the wear width on the rake face. However, in the cutting stage, the material removal efficiency is diminished in the absence process of crescent depression.

ISSN No.:0890-6955

Translation or Not:no

Date of Publication:2017-02-01

Co-author:Dai, Chenwei,xjh,fyc,Yu, Tianyu

Correspondence Author:dwf