Abstract
Abrasive wear tests on white cast irons were carried out using the wet rubber wheel test and the pin test on garnet and SiC commercial abrasive cloths. The microstructures of the irons were changed by varying the alloy content to obtain a range of 7–45 vol.% primary and/or eutectic carbides (massive carbides). To a good approximation the matrix composition of all the irons used was about the same. The influence of the matrix structure on abrasive wear was studied on one iron containing 28% massive carbides. The structure of the matrix was changed by heat treatment but the volume of massive carbides was kept constant. The optimum massive carbide content was governed by the occurrence of spalling of these carbides in a given abrasion test. The wear loss of the structures depended on the structure of the matrix, the volume of massive carbides and the wear system used.
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