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本工作以摩擦学原理分析抛丸机叶片磨损失效机理,分析了弹丸在叶片上的运动和作用力及其对磨损的影响。对成分相近但组织不同的高铬白口铸铁叶片(相应为Kind 1和Kind 2)的磨损表面和截面进行了观察分析。结果表明:Kind 1,由于受弹丸的冲击磨损和高速滑动磨粒磨损作用,在磨损表面下发生严重的变形。随着变形的累积、裂纹萌生和扩展、裂纹的相互作用和扩展导致合金碎片的剥落和磨损小坑的形成、塑性变形-裂纹-剥落是Kind 1叶片磨损的主要机制。对于Kind 2叶片,裂纹-剥落是主要磨损机制。Kind 1的耐磨性能比Kind 2要好。
In this work, the mechanism of failure of the blasting machine blade is analyzed by tribology. The movement and force of the projectile on the blade and its influence on the wear are analyzed. The wear surface and cross section of high chromium white cast iron blades (corresponding to Kind 1 and Kind 2) with similar compositions but different microstructures were observed and analyzed. The results show that: Kind 1, due to the projectile impact wear and high speed sliding abrasive wear, under the wear surface serious deformation occurs. With the accumulation of deformation, the initiation and propagation of cracks, the interaction and propagation of cracks leading to the spalling of alloy fragments and the formation of wear pits, plastic deformation-crack-spalling is the main mechanism of Kind 1 blade wear. For Kind 2 blades, crack-spalling is the main wear mechanism. Kind 1 wear better than Kind 2.