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本文研究了以棕刚玉及玻璃砂为磨粒的钢的冲蚀磨损与机械性能的关系及其磨损机制。结果表明在硬磨粒冲击下,钢的冲蚀磨损受断裂韧性影响较大。而当磨粒硬度接近或低于钢的硬度时,冲蚀磨损由钢的硬度所决定。在硬磨粒冲击下,除了常见的薄片、切削、犁沟等塑性变形机制外,韧性较低的钢会出现开裂机制而造成块状磨屑脱落。软磨粒要依靠多次冲击才能使材料以小片磨屑脱落,而且最大冲蚀率发生在90°冲击角。玻璃砂冲击时,在30°、90°会出现两个冲蚀磨损峰,这是由于玻璃砂在大角度冲击时溅射而产生二次磨损的结果。
In this paper, the relationship between erosive wear and mechanical properties of steel corroded with corundum and glass sand and its wear mechanism was studied. The results show that under the impact of hard abrasive, the erosion wear of steel is greatly affected by the fracture toughness. When the abrasive grain hardness is close to or lower than the hardness of the steel, erosion wear is determined by the hardness of the steel. In the hard abrasive impact, in addition to the common sheet, cutting, furrow and other plastic deformation mechanism, the lower the toughness of the steel cracking mechanism will result in massive debris off. Soft abrasive to rely on multiple impact in order to make small piece of debris off the material, and the maximum erosion rate occurred in the 90 ° impact angle. Glass sand at impact, at 30 °, 90 ° will appear two erosion wear peak, which is due to the high-angle impact of glass sand sputtering resulting secondary wear results.