摘要
用燃烧合成技术在钢板表面制备了金属陶瓷复合涂层。采用X射线衍射(XRD)、扫描电镜(SEM)、能谱(EDS)、硬度测定及抗热震性等实验对合成的涂层进行了研究。结果表明:涂层主要是由Cr3C2,Cr7C3及AlN等多相金属陶瓷组成的复合体系,其显微组织均匀致密,与基体之间为冶金结合,硬度是基体的4～5倍,抗热震实验显示涂层具有良好的结合力。为改善涂层的润湿性,利用Cr与Fe在高温下形成的金属间化合物作为过渡层,取得了良好的效果。
The cermet coating was prepared on steel plate by combustion synthesis method. The coating was investigated by means of XRD, SEM, EDS, microhardness measure and thermal shock resistance test. The microstructure and phase composition analyses on the synthesized sample show that the coating is a multiphase composite system consisting of Cr3C2, Cr7C3 and AlN. The surface of coating is even and the interface of coating is metallurgical bonding. The microhardness of the coating is 4 or 5 times higher than that of the substrate. The result of thermal shock resistance test shows that the coating has good bonding strength. In order to improve wettability between coating and substrate, metallic Cr, which has good dissolvability in Fe, was selected as a wetting functional component, and a better effect was obtained.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2003年第4期968-973,共6页
The Chinese Journal of Nonferrous Metals
基金
中国石油天然气集团公司科学研究与技术开发项目(99081603)
