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Properties, structure and machnining capabilities sintered corundum abrasives

Niżankowski C.

Archives of Foundry Engineering

2010

Vol. 10, iss. 3 spec.

57--62

The diversity of sintered corundum abrasives used in both bonded and in the embankment of abrasive tools currently poses substantial problems for their choice of technology to specific tasks. Therefore performed a comparative study of ownership structures and capacities of elected representatives machining sintered corundum abrasives of different generations, and this is normal sintered alumina, submicrocrystalline alumina sintered and nanocrystalline alumina sintered. Were studied some properties of a set of abrasive particles, physicochemical properties and structural and mechanical and technological properties. The studies used the method of microscopic measurement to determine the shape of abrasive particles, the pycnometer to determine the density of abrasive, a spectrometer to determine the chemical composition of the magnetic analyzer for determining the magnetic fraction, scanning electron microscope to analysis of abrasive grains and a special position to designate the machining capacity abrasive grains. The results showed a significant increase in machining capacity sintered corundum abrasives with increasing degree of fragmentation of the crystallites sintered corundum abrasives and distinctive bands in the emerging microchip. The originality of the development provides a comparative summary of properties of sintered corundum abrasives of different generations and functions obtained by the author making the change in value index of machining capacity grit from cutting speeds for different generations of sintered corundum.