摘要
以Fe2 O3 ,Cr2 O3 ,CrO3 ,NiO ,Al,Ti粉和C粉为原料 ,在离心力场中在碳钢基体表面原位反应合成了TiC FeNiCr复合材料涂层 .利用X射线衍射、金相照相、扫描电镜、X射线能谱分析等手段对涂层的显微结构和组织形貌进行了研究 .测试了涂层的显微硬度及干滑动磨损条件下的耐磨性能 .结果表明 ,涂层和碳钢基体能形成冶金结合 .涂层由FeNiCr奥氏体和其中弥散分布的TiC硬质相组成 .TiC颗粒晶粒尺寸小于 3μm ,形状呈多边形或花瓣状 .涂层显微硬度约为Hv 5 0 0～Hv 80 0 ,TiC含量增加 ,涂层的显微硬度提高 .
A TiC-FeNiCr composite materials coating on the substrate of a low carbon steel was successfully prepared using centrifugal-thermit process with raw materials Fe2O3, CrO3, NiO, Al, Ti and C powder. The microstructure of the coating was investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The microhardness and wear-ability of the coating were measured. The results shows that the coating is composed of austenite phase and the reinforced phase TiC. The coating is metallurgical bonded to the carbon steel substrate. The TiC grain takes the shape of a polygon or petal and its size is larger than that of the austenite phase. The microhardness of the composite coating is about Hv 500 - Hv 800, and it has good wear resistance under dry sliding wear test condition.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2004年第10期980-983,共4页
Journal of Beijing University of Aeronautics and Astronautics
关键词
铝热法
复合材料
碳化钛
燃烧合成
Carbon steel
Coatings
Iron alloys
Synthesis (chemical)
Titanium carbide
Wear resistance
