Effect of matrix structure and boriding time on the wear behaviour of Cu-Ni-Mo alloyed ductile iron [Matris yapisinin ve borlama süresinin Cu-Ni-Mo alaşimli Kgdd'in aşinma davranişina etkisinin incelenmesi]

In this study,effects of matrix structure (pearlitic,tempered martensitic and ausferritic) and boriding time (3,4,5 and 6 hours) at 800°c on the wear behaviour of cu-ni-mo alloyed ductile iron were investigated. wear tests were performed by ball on disc type wear tester under the load of 6.8 n,at sliding speed of 6.5 mm/s,at room temperature and dry sliding conditions. the friction coefficients were obtained during wear tests. the hardnesses,microstructures and worn surface examinations (sem) of the matrix structures and borided layers were performed. xrd analysis were done on the specimen borided at 800°c for 6 hours to identify the compounds in borided layer. single phased (fe2b) boride layers approximately in the range between 37-61 μm thicknesses were obtained by boronizing treatment. wear resistances were increased 3 and 2 times according to as-cast and tempered martensitic structures,respectively,by boronizing.