自生TiC颗粒增强高锰钢基复合材料的研制  

Fabrication and Mechanical Properties of High Manganese Steel Composites Reinforced with In-situ TiC Particles

作　　者：卢德宏[1] 商海燕 蒋业华[1] 周荣[1] 

机构地区：[1]昆明理工大学机电学院,云南昆明650093 [2]金堆城钼业有限公司机械分厂,陕西华县714102

出　　处：《铸造技术》2004年第2期120-122,共3页Foundry Technology

摘　　要：用铸造法成功制备了自生TiC颗粒增强的高锰钢基复合材料 ,研究了其显微组织和力学性能与Ti含量的关系。结果表明 ,高锰钢基复合材料的显微组织由TiC颗粒 ,奥氏体和合金渗碳体组成。其中合金渗碳体随着Ti含量的升高而逐渐粗大 ,且连续分布于晶界处。随着Ti含量的升高 ,高锰钢基复合材料中TiC颗粒的数量增多 ,硬度逐渐升高。含 5 %Ti的复合材料热处理态硬度达到HRC3 9,是纯高锰钢的 2 .6倍。随着Ti含量的升高 ,高锰钢基复合材料的冲击韧度大幅降低。其中 ,含5 %Ti的复合材料经水韧处理后冲击韧度达到 60J/cm2 。The high manganese steel matrix composites reinforced with in-situ TiC particles have been made by casting process successfully, the relationship between Ti content and its microstructure and mechanical property has been studied well. The results show that microstructure of high manganese steel matrix composite is made of TiC particles, austenite and alloy cementite. Cementite is gradually coarsened and distributed at the boundary of crystal when Ti content is increased. The more Ti content is, the more amount and hardness TiC particle is. For example, hardness of composites containing 5% Ti is HRC39 after it is heat treated, and is 2.6 times that of pure high manganese steel. Moreover, the more Ti content is, the less impact toughness is. For example, impact toughness is 60 J/cm26 after it is quenched.

关 键 词：高锰钢 金属基复合材料 TIC颗粒 

分 类 号：TB331[一般工业技术—材料科学与工程]