Effects of microstructure on machinability of ductile iron
Date
2011
Authors
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Publisher
Sage Publications
Abstract
In this paper, ductile irons with different microstructures were machined in a group of experiments using standard testing procedure and the effect of microstructure on the machinability was investigated. Bars (diameter 90 mm x 320 mm) of ferritic/pearlitic, tempered martensitic, and lower ausferritic microstructures were produced by various heat treatments and then tested to evaluate their machinability. Five groups of ductile iron specimens with various microstructures were tested following ISO 3685: 1993 (E) standard. Specimens were subjected to dry cutting; cutting force, flank wear width, and surface roughness were measured to compare the machining performances. In addition, further turning tests were conducted on the specimens of austempered microstructure at various feed rates (while keeping the cutting speed and depth of cut constant), and both surface roughness and cutting force values were recorded. The influence of feed rate on the machinability of austempered ductile iron was investigated and a correlation between feed rate and machinability, in terms of cutting force and surface roughness, was established. Not only the tangential cutting force component but also the feed force component was taken into consideration in these tests.
Description
Keywords
Engineering, Ductile irons, Microstructures, Machinability, Tool life, Cast-iron, Mechanical-properties, Fracture-toughness, Matrix structure, Wear-resistance, Cutting forces, Behavior, Fatigue, Time, ADI, Ductility, Iron, Nodular iron, Stainless steel, Surface properties, Surface roughness, Austempered ductile irons, Cutting forces, Cutting speed, Depth of cut, Dry cutting, Feed forces, Feed-rates, Flank wear, Machining performance, Standard testing, Tangential cutting force, Tool life, Turning test, Microstructure
Citation
Çakır, M. C. vd. (2011). "Effects of microstructure on machinability of ductile iron". Proceedings of the Institution of Mechanical Engineers, Part B-Journal of Engineering Manufacture, 225(B2), 297-304.