原位合成碳化钛颗粒束增强铸铁基复合材料的磨损性能  

Abrasive wear properties of titanium carbide particle bundle reinforced iron matrix composite prepared by in-situ synthesis

作　　者：王亮亮[1] 钟黎声[1,3] 叶芳霞[2] 陈哲[1] 贾昭[1] 

机构地区：[1]西安建筑科技大学机电工程学院,耐磨材料研究所,陕西西安710055 [2]西安理工大学材料科学与工程学院,陕西西安710048 [3]西北工业大学凝固技术国家重点实验室,陕西西安710068

出　　处：《材料热处理学报》2013年第9期26-30,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50974101);国家高技术研究发展计划(2013AA031803)

摘　　要：采用丝材复合-原位反应方式在球墨铸铁中原位生成了一种碳化钛颗粒束增强体,制备出颗粒束增强铸铁基整体复合材料。使用XRD、SEM(带EDS)、两体磨损试验机对复合材料的矿物组成、宏观和微观结构、化学成分分布以及耐磨特性进行了观察和测试。结果表明:在1138℃保温12 h,钛丝完全反应,原位生成碳化钛颗粒束,并且分布均匀。对单根丝区域的成分分析和形貌观察结果表明颗粒束中碳化钛呈现出3种形态:均匀分散的碳化钛小颗粒、长条状碳化钛颗粒和碳化钛颗粒聚合相。两体磨料磨损试验结果表明复合材料的耐磨性是铸铁标准试样的4倍以上。Titanium carbide （TiC） particles bundles-reinforced iron matrix composite material was prepared by the method of in-situ reaction between Ti wires and C atoms in the matrix. Component, structure, chemical composition and abrasive resistance of the composites were observed and tested by XRD, SEM （with EDS） and two-body wear testing. The results show that the titanium wire has reacted completely and generated hard particles bundles of titanium carbide which are evenly distributed when the preform of nodular cast iron and titanium wire heated at 1138 ℃for 12 h. Three kinds of TiC morphology in the particle bundle are observed： small globular particles, long strip particles and agregated titanium carbide particles. The two-body abrasive wear test indicate that wearing resistance of composite is 4 times higher than that of standard sample.

关 键 词：碳化钛 整体复合材料 耐磨性 

分 类 号：TB331[一般工业技术—材料科学与工程]