离心力场中TiC/FeNiCr复合材料 涂层的原位反应合成

席文君; 祝伟丽; 段辉平; 张涛

离心力场中TiC/FeNiCr复合材料涂层的原位反应合成

北京航空航天大学材料科学与工程学院北京 100083

详细信息

作者简介:
席文君(1964-),男,内蒙古赤峰人,副教授, xiwj@buaa.edu.cn.

中图分类号: TB 3
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出版历程
- 收稿日期: 2004-04-28
- 网络出版日期: 2004-10-31

Self-reaction in-situ synthesis of TiC/FeNiCr composite coating in centrifugal field

School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 以Fe₂O₃,Cr₂O₃,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 500~Hv 800,TiC含量增加,涂层的显微硬度提高.涂层较碳钢具有优异的耐磨性能.
- 铝热法 /
- 复合材料 /
- 碳化钛 /
- 燃烧合成
Abstract: 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 powders. The microstructure of the coating were investigated using scanning electron microscope (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 it’s size is lager 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.
- thermite method /
- composite materials /
- titanium carbide /
- combustion synthesis

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