SUMMARY The wear characteristics of four different matrices of an S.G.* cast iron have been investigated under dry sliding conditions at a constant speed of 200 cm/sec over a load range of 0.35-27 kg. The as-cast pearlitic structure had a hardness of 210 HV 30,and the isothermally "transformed pearlite, bainite and tempered martensite were all approximately 310 HV 30. TE 99 通用摩擦磨損試驗機(jī)