Title: High-efficiency grinding of cold-work die steel with ultrafine-crystalline cBN abrasive grains

Authors: Yoshio Ichida, Nabil Ben Fredj

Addresses: Department of Intelligent Mechanical Systems Engineering, Utsunomiya University, 7-1-2, Yoto, Utsunomiya, 321-8585, Japan. ' Laboratoire de Mecanique, Materiaux et Procedes (LR99ES05), ESSTT, 5, Avenue Taha Hussein, 1008 Montfleury, Tunis, Tunisia

Abstract: This paper presents the grinding characteristics of newly developed ultrafine-crystalline cBN (UcBN) abrasive grains in high-efficiency grinding of cold-work die steel. This new UcBN grain possesses an ultrafine crystal structure composed of sub-micron sized primary crystal grains. The fracture strength of the UcBN grain is about 3.7 times higher than that of conventional monocrystalline cBN grain. The grinding ratio in grinding with the UcBN grain is eight to 11 times higher than those in grinding with conventional typical monocrystalline and polycrystalline cBN grains.

Keywords: ultrafine crystalline abrasive grains; cBN abrasive grains; grinding characteristics; cold-work die steel; high efficiency grinding; fracture strength; cubic boron nitride.

DOI: 10.1504/IJMMM.2011.039646

International Journal of Machining and Machinability of Materials, 2011 Vol.9 No.3/4, pp.197 - 208

Published online: 30 Dec 2014 *

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