摘要
TiC以其优异的物理和化学性能在工程领域具有重要的研究意义和实用价值。研究了一种激光强化原位反应制备TiC涂层的新方法,在45#钢表面预置自制的水合二氧化钛和石墨混合粉末,选用Nd∶YAG激光对预置层进行强化处理。分别采用X射线衍射(XRD)仪、扫描电子显微镜(SEM)、显微硬度仪检测了激光处理后涂层表面、涂层横截面的显微组织及强化层的硬度。结果显示,激光处理后强化层表面平滑,与基体形成冶金结合。强化层主要由Fe,TiC,FeTiO3组成,其中TiC颗粒分布于强化表层,颗粒度为1～3μm。由于强化层中弥散有原位反应合成的TiC强化相,强化层硬度得到显著提高,表层最高硬度为1150 HV0.1,平均硬度为950 HV0.1,比基体提高了3倍。
Featured with excellent physical and chemical properties,TiC has important significance and practical application value.A new method to synthesis TiC by combining laser and sol-gel technology is reported.TiO2 sol-gel coating is prepared on the surface of 45# steel and then treated by Nd∶YAG laser.The microstructure and performance of the coating after laser treating are tested by scanning electronic microscope（SEM）,X-ray diffraction（XRD）,and micro-hardness tester respectively.The results show that the surface of coating is flat,and there is a metallurgical bonding between hardened coating and parent metal.The coating is consisted of Fe,TiC,and FeTiO3,and the particle of TiC with size of 1～3 μm distributes on the topside of the coating.With dispersion reinforced phase TiC,the hardness of the hardened coating increases obviously.The average micro-hardness reaches 950 HV0.1,which is 3 times more than that of substrate.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2010年第10期2653-2657,共5页
Chinese Journal of Lasers
关键词
激光技术
原位合成
TIC
显微结构
laser technique
in-site synthesis
TiC
microstructure
