摘要
采用电火花沉积技术,以NiCr合金为堆焊电极,在35CrMo钢表面沉积NiCr合金强化涂层。用显微硬度计测试了涂层的显微硬度,用SEM,EDX,XRD等方法表征了涂层的微观结构、化学成分分布及相组成。结果表明:涂层的表面显微硬度约为基体的2倍;涂层与基体的主要元素发生了相互扩散,涂层是由基体与NiCr合金电极发生反应形成的冶金结合层,主要成分为NiCrFe和FeNi。
NiCr alloy coating was produced on the surface of 35CrMo steel with NiCr electrode by electro-spark deposition.The micro-hardness was obtained with hardness meter,the microstructure and chemical composition distribution and phase composition of the coating were investigated with scanning electron microscopy（SEM）,energy dispersion spectrum（EDX） and X-ray diffraction（XRD） respectively.The results show that the micro-hardness of the coating is about 2 times as that of the substrate.Inter-diffusion takes place and metallurgy combination layer forms between the coating and the substrate,the main phase composition of the coating consists of NiCrFe and FeNi.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2010年第4期5-7,共3页
Surface Technology
基金
国家自然科学基金(50774029)
河南省杰出青年科学基金(074100510011)
河南科技大学青年基金项目(2006QN049)
关键词
电火花沉积
NICR涂层
性能
机理
electro-spark deposition
NiCr coating
character
mechanism
