Accession Number : AD0781470

Title :   A Scanning Electron Microscope Study of Attrition Wear in Tungsten Carbide Taper Pin Reamers,

Corporate Author : DEFENCE STANDARDS LABS MARIBYRNONG (AUSTRALIA)

Personal Author(s) : Turley,D. M.

Report Date : 15 SEP 1973

Pagination or Media Count : 9

Abstract : The wear of tungsten carbide taper pin reamers used to ream holes in a composite structure of aluminium alloy plate overlaying a plate of ultra-high strength steel was examined under the scanning electron microscope. The predominant process of wear was by attrition, which involved the mechanical detachment of individual or groups of tungsten carbide grains from the reamers by both the swarf and workpiece material. This process of attrition wear was initiated by the removal of the cobalt binder phase, resulting in the undermining and subsequent removal of tungsten carbide grains. A mechanism is described for explaining how the cobalt binder phase is initially removed, and the means by which tungsten carbide grains are then removed are discussed. Consequent on the removal of tungsten carbide grains some cobalt binder phase attached to these grains is also removed, and this subsequently becomes an important mechanism of cobalt binder phase removal. (Author)

Descriptors :   *Reamers, Wear, Tungsten compounds, Carbides, Carbide tools, Attrition, Electron microscopy, Electronic scanners, Australia

Subject Categories : Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE