The crushers are used by mining and aggregate industries for crushing the rocks. Wear in these crushers wear parts causes a great wear loss and significant economic loss. This work aims to find the worn geometry, hardness and behavior of the wear parts as function of rock type.To perform this research, a series of tests such as scratch test, rock-crushing test, microstructural analysis and hardness test were carried out. From the scratch test, hardness test and microstructural analysis, wear mechanism and work hardening effects were studied using LOM, SEM and Vickers hardness measurement. The crushing test was carried out by crushing quartzite, diabase and gneiss rocks in a mini jaw crusher with respect to M1, M2 and M7 samples proposed by the company, which provides data to calculate volumetric loss, wear ratio and data for power consumption. The data collected from the experiments are used to create model to get a clear picture of the performance of each material with respect to different rock type.During pouring the rocks into the jaw crusher, several types of wear are expected to be occur, which substantially results in change of the geometry of the jaw crusher plates and hence the performance of the crusher will be affected. Controlling of such harsh wear situations requires introducing a material with high-performance wear resistance (particularly abrasion) and fundamentally modifying the operating conditions to minimize the risk of severe wear degradation. For this reason, it is desirable to simulate how the geometry and performance are changing due to wear.The results from the scratch test and microstructural analysis showed that at low applied loads severe plastic deformation is seen but as the load increases, the work hardening mechanism develops and provides wear resistance properties. The results from hardness test and modeling, M7 sample shows good wear resistance properties against hard and abrasive rocks which in this case is diabase and quartzite rocks, M2 sample shows good wear resistance against only quartzite rocks and gneiss rocks. M1 sample shows less volumetric loss against quartzite but when compared to M2 and M7’s mechanical property, M1 showed low wear resistance against all three rocks.

Key words: Wear mechanism, work hardening, wear ratio, volumetric loss, power consumption, M1, M2, M7 samples, quartzite, diabase and gneiss rock.