Wear Resistance Analysis Of Shearer Slipper Based On Laser Cladding Technology

Slipper,the main load-bearing component of Shearer,often appears various wear and failure problems in practical work because of the changeable and bad working conditions of the shearer.A metallurgical bonded surface coating was formed on the base alloy surface by laser cladding technology,which has specific metallurgical properties,mechanical properties and physical properties.It can be used to improve the strength,hardness and wear resistance of the material surface.The research contents of this paper include:In this paper,laser cladding technology is applied to the surface of 35CrMoV steel to prepare experimental samples with different proportions of WC reinforcement phase materials.Comparing and Analyzing the interfaces and cladding layers of different samples by scanning electron microscopy(SEM)and energy dispersive spectrometer(EDS).Thus,the micro reasons of wear resistance improvement of shearer slippers are obtained.Then,the tribological experiments were carried out on each sample.The improvement of wear resistance of slipper was quantified and predicted from the tribological indicators,such as microhardness,friction coefficient,wear quantity,wear morphology,3D model of friction surface,etc.,by friction and wear experiments.The wear resistance of shearer slipper is improved.The results show that the thickness of bonding zone at the interface between matrix and cladding layer is obviously larger than that between cladding layers.There is obvious element segregation in the transition zone and great difference in the structure characteristics between the two sides,which is easy to produce cracks.There are columnar and dendritic structures at the bottom of the cladding layer.With the increase of WC content,the columnar and dendritic structures gradually become fine and uniform.The fluctuation range and numerical value of friction coefficient f,gradually increase with the increase of time T.With the increase of load,the wear loss increases gradually with the decreasing increase extent.With the increase of WC,the wear morphology of materials changes from adhesion wear to ploughing wear.The wear morphology changes from V-shaped to concave-shaped with wider and shallower wear marks and obviously decreasing wear depth.