Effects of Si and Austempering on the Wearresistance Property of ZG30SiMnCr
The appropriate chemical composition and heat treatment are very effective to enhance the wear resistance of ZG30SiMnCr.The effects of Si and austempering on the wear-resistance of ZG30CrMnSi were investigated.The results show that the wear-resistance of the alloy ZG30SiMnCr austempered by the same technology increases to some extent with increase of Si.The wear-resistance of ZG30CrMnSi austempered at 300 ℃ holding for 60 min is better than that at 280 ℃ holding for 45 min.The worn surfaces of samples were observed by SEM.It was found that the main wear mechanism is micro-cutting,and worn surface morphology mainly consists of wear craters and furrow.A slight spalling phenomenon occurred on the worn surface of the sample with 0.9% Si.