高碳当量合金灰铸铁摩擦磨损性能研究  

Study on Friction and Wear Properties of High Carbon Equivalent Alloy Gray Cast Iron

作　　者：王笃雄[1] 郑志伟[1] 陈荣发[1] 顾晓文 赵玉宝 陈倩钰 

机构地区：[1]扬州大学机械工程学院,江苏扬州225127 [2]通富热处理(昆山)有限公司,江苏昆山215300 [3]爱丁堡大学工程学院

出　　处：《铸造》2017年第6期618-621,共4页Foundry

基　　金：2014国内产学研协同创新(2014-13);中国留学基金委员会(NO.201608320255)联合资助

摘　　要：高碳当量灰铸铁由于其碳含量较高,组织中石墨数量较普通灰铸铁多,铬、钼、铜等合金元素的加入使得石墨形态良好,故高碳当量合金灰铸铁的导热性和耐磨性更佳。以HT250和高碳当量合金灰铸铁为研究对象,研究两种灰铸铁在不同摩擦条件下的摩擦磨损性能,并结合扫描电镜(SEM)和金相探讨了两种灰铸铁微观组织和性能的关系及摩擦磨损机理。研究表明:高碳当量合金灰铸铁的抗拉强度为263 MPa,略高于HT250,石墨形态和HT250类似;在相同的摩擦磨损条件下,高碳当量合金灰铸铁的摩擦系数更小,耐磨性更优。Because of high carbon content, the amount of flake graphite in the organization of high carbon equivalent gray cast iron is much more than the ordinary gray cast iron. Because of chromium, molybdenum, copper and other alloying elements, the morphology of graphite is excellent, the thermal conductivity and wear resistance of high carbon equivalent alloy gray cast iron is better than ordinary gray cast iron. In this paper, HT250 and high carbon equivalent alloy gray cast iron are as the research object, study the properties of friction and wear properties of two kinds of materials under different friction conditions, the relationship between microstructure and performance, friction and wear mechanism were studied by means of scanning electron microscopy（SEM）and metallographic microscope. The research shows that, the tensile strength of high carbon equivalent alloy gray cast iron is 263MPa which is slightly more than HT250, the morphology of graphite is similar to HT250; the friction coefficient of high carbon equivalent alloy gray cast iron is smaller than HT250 under the same friction condition, the wear resistance is much better than HT250.

关 键 词：高碳当量 灰铸铁 摩擦磨损 摩擦系数 

分 类 号：TG143.2[一般工业技术—材料科学与工程]