Abstract
Austenitic stainless steel AISI 321 is one of the most difficult to cut materials. In order to investigate the wear behavior of Si 3N 4 ceramic when cutting stainless steel, wear tests were carried out using a pin-on-disk tribometer which could simulate a real cutting process. Test results show that the wear of Si 3N 4 ceramic is caused mainly by adhesion between the rubbing surfaces; the wear increases with load and speed. When oil is used for lubrication, the friction coefficient of the sliding pairs and the wear rate of the ceramic are reduced. Scanning electron microscopy, electron probe microanalysis, and energy-dispersive X-ray analysis were used for examination of the worn surfaces. The wear mechanisms of Si 3N 4 ceramic sliding against stainless steel are discussed in detail.
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