Metallofizika i Noveishie Tekhnologii, cilt.29, ss.105-114, 2007 (SCI Expanded İndekslerine Giren Dergi)
The purpose of this work is to investigate sliding wear behaviour of the wearing train rail welded by the electric-arc welding technique. Samples are obtained from the wearing rail filled by the welding, using a various kind of manual arc-welding metal electrodes. The weld metal is characterized according to filling electrodes in terms of both hardness and microstructure. Wear behaviour of the filling weld metal is investigated in conditions of various loadings and distances. In addition, the friction coefficient of samples is determined according to the applied loadings and wear distances. Experimental results show. that the increase in loading and wear distance exerts the great influence on wear-resistance performances of samples. The samples having higher hardness demonstrate high wear-resistance performances. Also, a metallographic investigation indicates that the samples having the small-size grains display the better wear resistance than the samples containing the larger-size grains.