Effect of ZrO2-toughened Al2O3 ceramic particles on impact abrasive properties of reinforced high-chromium cast iron matrix composites

Abstract

Traditional wear-resistant steel materials can hardly meet the needs of modern mining equipment for key wear-resistant components, and ceramic particle-reinforced steel-based wear-resistant composites have become one of the most promising wear-resistant materials. ZrO2 toughened Al2O3 ceramic particles reinforced with high chromium cast iron (HCCI) matrix composites were prepared by pre-sintering to obtain ceramic preforms with different volume fractions and particle sizes in combination with the casting and infiltration method. The results show that with the increase of ZTA (ZrO2-toughened Al2O3) particle volume fraction (25%-45%) and the decrease of ZTA particle equivalent diameter (1.7, 1.2, 0.4 mm), the impact wear resistance of the composites improves, with the best at 45% particle volume fraction and 0.4 mm equivalent particle diameter.The main wear characteristic of ZTAp/HCCI composites is the occurrence of microcutting on the wear surface, and its main wear mechanism is abrasive wear.

Keywords

• zta
• hcci
• composite
• impact abrasive wear
• wear resistance