Fabrication of WC Particles Steel Matrix Surface Composites Using Electromagnetic Induction Melting-infiltration Method
The preparation technology of metal matrix surface wear-resistant composite was discussed and a new method,which is named electromagnetic induction melting-infiltration method,was proposed.According to the particularity of electromagnetic induction heat,the steel matrix surface composites reinforced by WC ceramic particles were successfully gained.The organization and ingredients in the composite layer,the interfacial structure between WC ceramic particle and the ZG45 steel matrix were analyzed by means of optic microscope,scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDX) and X-ray diffraction(XRD).The two-body abrasive wear test was performed on the normalized 45 steel and the composites.The experimental results indicate that the thickness of composite-layer is even and the average thickness is greater than 4 mm,that the WC particles in the composite-layer are homogenous.There is an obvious element diffusion in the interface between WC particles and the matrix,and the interface is a perfect metallurgical combination.The hardness test results show that the hardness of composite-layer is improved distinctly,which is 2~3 times of the steel matrix.The two-body abrasive wear performance of the composites is increased significantly,which is 37.6 times of the normalized 45 steel.