SLIDING WEAR BEHAVIOR OF NITRIDED AND NITROCARBURIZED CAST IRONS

In this work the friction and the wear resistance behavior of surface treated spheroidal and lamellar cast irons was studied. Thermochemical surface treatments included nitriding and nitrocarburizing. After cha racterization of the surface layers, dry sliding wear tests were perfo rmed on a prototype pin-on-disk apparatus in which cast iron disks wer e mated to hardened steel pins. The influence of the sliding velocity on the response of the various combinations of material and surface tr eatment was determined. Also, the influence of the contact geometry wa s investigated using hemispherical and flat pins.