Wear resistance of coke-crushing hammersZupanič, Franc (Avtor) zvarni spojmikrostruktureobrabna odpornosttoplotna obdelavaobrabakladivoweld depositionmicrostructureimpact coke crusherheat treatmentwearhammerThis work investigated several methods for improving the wear resistance of the 42CrMo4 tool steel used for coke-crushing hammers. The methods embraced heat treatment for obtaining different combinations of strength and ductility of the bulk steel, and surface-engineering processes comprising TiN thin-film deposition using magnetron-sputtering, nitriding and WC/Ni weld deposit surfaced by gas metal arc (GMA) method. The wear-resistance was tested under industrial conditions. Oil quenching and tempering significantly increased the wear resistance in comparison to the as-received condition. Conversely, nitriding and TiN-hard coating did not show any significant improvement. WC/Ni weld deposit provided the best protection against wear, which was caused predominantly by hard abrasive particles present in the coke.20132015-07-10 12:40:12Delo ni kategorizirano50460UDK: 621.7OceCobissID: 25188864COBISS_ID: 17093142ISSN pri članku: 0008-4433NUK URN: URN:SI:UM:DK:LOCRDUNBsl