Structure and Properties of Some Tin Bronzes Produced by Extrusion of Atomized Powders

Abstract

Eight differing tin bronzes have been produced by extruding atomized powders. The products have been subjected to mechanical tests and structural examination. The results of tests on more than 250 separate extrusions are reported. It is shown that the microstructure of bronzes is considerably modified if powder is utilized as stock material, and that the improvements are also a function of the processing conditions and, in the case of two-phase materials, of the original particle size. The relationship between structure and properties is reported in some detail, and wear resistance and electrical conductivity are shown to be, respectively, superior to and equivalent to those of comparable wrought material.