用电弧喷涂技术在Q235钢基体上制备一种高非晶含量的Fe基非晶涂层,将非晶涂层在600 ℃中保温1h,使非晶晶化形成纳米结构涂层.采用X射线衍射、差热分析、透射电镜、湿式橡胶轮磨粒磨损试验机测量涂层的组织和性能.试验结果表明,涂层呈典型的层状组织,结构致密,孔隙率低,晶粒尺寸为10～40 nm,其平均显微硬度为1143 HV0.1,同等试验条件下,纳米结构涂层耐磨粒磨损性能约为3Cr13涂层的5倍.
Coating containing amorphous phase on a mild steel substrate was prepared by arc spraying using Fe-based cored wire as spraying material, and then the coating was annealed at 600 ℃ for 1h for crystallization of the coating. The microstructure and properties of the coating was investigated by means of XRD, differential thermal analysis, transmission electron microscopy and wear test. The results show that the coating exhibits the typical lamellar structure with little pores. The grain size of the coating is 10～40 nm. Microhardness of the coating is about 1143 HVO. 1, and the wear resistance of the nano-coating is five times better than that of 3Cr13 coating.
参考文献
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