A STUDY ON THE RELATIONSHIP BETWEEN THE MAGNETIC-PROPERTIES OF A WORNSURFACE-LAYER AND THE WEAR-RESISTANCE

In the pin-on-disk test, the wear rates of 5 wt.% Cr-Mn-Mo steel tempe red in different temperature ranges are very different because of vari ous wear mechanisms. The wear resistance of 5 wt.% Cr-Mn-Mo steel is m uch higher when tempered at 200-degrees-C than when tempered at 300-70 0-degrees-C. From the shapes of the wear debris, microcutting and micr oploughing are recognized. Also the wear surface parameters are measur ed with a Talysurf instrument. The coercive forces of the worn surface layers and unworn specimens are measured with a vibrating-sample magn etometer. The results show that the tendency of wear resistance is sim ilar to that of the coercive force for unworn specimens. The variation in the coercive force for worn surface layers can reflect the change in the wear mechanisms.