Effect of Matrix on Wear Properties of ZTAp/Steel Matrix Composites
The effects of different matrix compositions on the impact abrasive wear properties of spatial structure composites were investigated.ZTAp/40Cr steel matrix composites with different matrix Cr contents in the composite zone were prepared by squeeze casting.After quenched at 850 ℃ and tempered at 200 ℃,impact abrasive wear experiments of the specimens were carried out,which were compared with high manganese steel.The experimental results show that the matrix Cr content in the composite zone gradually increases from 2wt％,5wt％and 15wt％,the volume wear rates of the composites are 8.02×10-4 cm3/min,5.37×10-4 cm3/min and 5.46×10-4 cm3/min,respectively.The trend decreases first and then stabilizes.In contrast,the volume wear rate of high manganese steel is 7.57×10-4 cm3/min,so the wear resistance of the composites containing 5wt％Cr is 41％higher than that of high manganese steel.The analysis shows that the wear mechanism of ZTAp/40Cr steel matrix composites with a certain Cr content is mainly abrasive wear and adhesive wear,and that a matrix with good performance ensures excellent support and energy absorption.In coordination with the reinforcement,the wear resistance of the composites is improved.
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