Effect of matrix hardness on the impact abrasive wear performance of ZTAp/steel architecture composite

Abstract

The effect of the hardness of a steel matrix by heat treatment on the impact abrasive wear of ZTAp/40Cr steel architecture composites is investigated. Of these composites, the ZTA particles-reinforced 40Cr steel matrix composite and pure 40Cr steel formed a 3D network interpenetrating structure. The results show that the architecture composites with the martensite matrix demonstrate the best wear resistance, which is 32.76% higher than that with the troostite matrix and 163.60% higher than that with the pearlite matrix. Under the same Under the same quenching + 460 °C tempering conditions, the wear resistance of the architecture composites is 79.0% higher than that of the homogeneous composites. The wear mechanism analysis shows that the wear performance of composites depends on the interaction between the matrix and the reinforced particles. As the hardness of the composites matrix increases, the reinforcement particles are more strongly supported by the matrix. Conversely, the matrix is preferentially worn, and the ZTA particles are shed due to the lack of protection. The main wear mechanisms include micro-cutting, plastic fatigue wear, and particle crushing and spalling.

Keywords

• architecture composite
• matrix hardness
• impact abrasive wear
• wear mechanism