摘要
以灰铸铁为基体、Ti-C-Fe粉末体系为表面预制涂层材料,采用真空消失模铸造与自蔓延相结合的方法制备TiCp表面复合材料,通过改变预制粉体中Fe含量研究表面涂层的组织和性能。结果表明,铁基表面涂层主要由TiC与Fe相组成,而且涂层表面自生的TiCp呈近球形,分布均匀,与基体结合良好。TiCp的尺寸随涂层中Fe含量的增加而减小,但涂层硬度与耐磨性却先降低后提高,其中涂层最高硬度(HRC)可达到59.8。
TiC particle reinforced surface coating composites were prepared with grey cast iron as matrix and Ti-C-Fe powder system as surface pre-formed coating by vacuum EPC combined with SHS method.Effects of Fe content in Ti-C-Fe system on microstructure and properties of surface coating were investigated.The results show that the surface of Fe based coating is mainly composed of TiC phase and Fe phase.The in-situ TiC coating on the surface of substrate with nearly spherical shape has an uniform distribution and a desirable combination with substrate.The size of TiC particles is decreased with the increase of Fe content in the coating,while the hardness and wear resistance of the coating is decreased firstly and then increased,where the highest hardness can reach 59.8HRC.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2017年第5期522-526,共5页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51375353)
关键词
真空消失模铸造
自蔓延高温合成
TICP
表面复合材料
Vacuum Evaporative Pattern Casting
Self Propagating High Temperature Synthesis
TiC Particles
Surface Composites
