Effect of Rare Earth on Microstructures and Properties of High Speed Steel With High Carbon Content  

作　　者：YANG Jun ZOU De-ning LI Xiao-ming DU Zhong-ze 

机构地区：[1]School of Metallurgical Engineering, Xiran University of Architecture and Technology, Xiran 710055, Shaanxi, China [2]State Key Laboratory for Mechanical Behavior of Materials, Xi＇an Jiaotong University, Xi＇an 710049, Shaanxi, China

出　　处：《Journal of Iron and Steel Research International》2007年第1期47-52,59,共7页

摘　　要：The effects of rare earth （RE） on the microstructures and properties of high carbon high speed steel （HCHSS） were investigated. The results show that when suitable RE is added to the HCHSS, the effect of RE on the austenite and eutectic carbides is obvious. The austenite grain and coarse eutectic structure are refined, and flake carbides in the eutectic structures become short and fine. After heat treatment, most of the eutectic carbides are spheroidized and distributed in a uniform manner. The hardness and red hardness of modified HCHSS are slightly increased; impact toughness is greatly increased by 37.81% and reaches 10.17 J/cm^2. The mechanism by which RE improves the structures and properties of HCHSS is also analyzed.The effects of rare earth （RE） on the microstructures and properties of high carbon high speed steel （HCHSS） were investigated. The results show that when suitable RE is added to the HCHSS, the effect of RE on the austenite and eutectic carbides is obvious. The austenite grain and coarse eutectic structure are refined, and flake carbides in the eutectic structures become short and fine. After heat treatment, most of the eutectic carbides are spheroidized and distributed in a uniform manner. The hardness and red hardness of modified HCHSS are slightly increased; impact toughness is greatly increased by 37.81% and reaches 10.17 J/cm^2. The mechanism by which RE improves the structures and properties of HCHSS is also analyzed.

关 键 词：RE HCHSS eutectic carbide SPHEROIDIZING TOUGHNESS 

分 类 号：TG142[一般工业技术—材料科学与工程]