Strengthening/Toughness Match and Wear Resistance of Granular γ+(Fe,Mn)₃C/γ In-situ Composites

The performance of granular γ+(Fe,Mn)₃C eutectics reinforced austenite steel matrix composites (EAMC) was studied, and the strengthening/toughness match and wear resistance were analyzed. The results show that hard granular eutectic particles and soft austenite matrix contribute to the strengthening/toughness match of EAMC. The wear resistance of EAMC under low normal load is because of that the eutectic particles under the protection of austenite matrix can delay effectively crack propagation on the subsurface in the process of sliding wear, and the micro-hardness in the strain hardened zone distributes in a negative gradient. The granular eutectic particles are flaked off at high normal load, which intensifies the triple body wear and increase the mass loss of EAMC.