前驱体碳化粉末反应火焰喷涂制备TiC增强金属复合涂层.pdfVIP

学兔兔 第27卷第6期 粉末冶金技术 Vo1．27．No．6 2009年12月 Powder Metallurgy Technology Dec．2009 前驱体碳化粉末反应火焰喷涂制备 TiC增强金属复合涂层 张守全 王海涛 黄继华 一 朱警雷 张 强 刘慧渊 1)(北京科技大学材料科学与工程学院材料加工系，北京 100083) 2)(厦门金鹭特种合金有限公司，福建厦门 361006) 摘 要： 采用前驱体碳化复合技术制备了rri—Fe—C和Ti—Ni—c两种体系的反应热喷涂复合粉末，通过氧乙炔 火焰喷涂原位合成并沉积了TiC增强Fe基和Ni基复合涂层。利用 XRD、SEM和EDS研究了复合粉末、涂层 的相组成和组织结构，考察了TiC／Fe、TiC／Ni复合涂层的硬度和耐磨性。结果表明：复合粉末在喷涂过程中 反应充分，可分别生成以Fe和Ni为粘结相的TiC增强涂层；两种涂层都是由TiC颗粒均匀分布的复合强化 片层和TiC聚集片层叠加而成，TiC／Fe复合涂层的片层较薄，而TiC／Ni涂层中TiC的聚集片层较少；TiC／Fe 涂层的硬度高于TiC／Ni涂层，两者的耐磨性能分别约为Ni60涂层的11倍和6倍。 关键词：反应火焰喷涂；TiC颗粒；前驱体；金属陶瓷复合涂层 TiC reinforced cermet coatings prepared by reactive flame spraying of powders via carbonization of precursor Zhang Shouquan ，W ang Haitao”， Huang Jihua ，Zhu Jinglei”， Zhang Qiang”，Liu Huiyuan 1)(School of Materials Science and Engineering，University of Science and Technology Beijing，Beijing 100083，China) 2)(Xiamen Golden Egret Special Alloy Company Limited，Xiamen Fujian 361006，China) Abstract：In this paper，Ti—Fe—C and Ti-Ni—C composite powders for reactive thermalspray were prepared by precursor carbonization—composition process．TiC／Fe and TiC／Ni cermet coatings were synthesized and deposited by reactive flame spray of the composite powders．XRD，SEM and EDS were employed to analyze the phases and microstruetures of these composite powders and coatings．Hardness and wear resistance of the cermet coatings were also investigated．The results show that：The reaction between Ti and C can occur during spraying