ABRASIVE WEAR STUDY OF BAINITIC NODULAR CAST-IRON

The abrasive wear properties of the bainitic nodular cast iron under d ifferent austenitizing and isothermal transformation temperature and t ime were studied in the present paper. Using Optimol schwingung reibun g verschleiss wear tester, the point contact is adopted to compare the effect of those various heat-treatment conditions on wear properties. The weight loss, wear-scar diameter and friction coefficient were mea sured to evaluate the wear properties. Using scanning electron microsc opy, the wear mechanisms can be understood by observing the worn surfa ce. From the results of weight loss, wear-scar diameter and friction c oefficient, it can be concluded that the wear resistance increased wit h increasing austenitizing temperature and the most suitable austemper ing temperature of the material used in the present study is from 270- 300-degrees-C for 4 h.