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本文介绍了一种从粘结层到面层成分和性质逐渐不同的功能梯度涂层(FGC)。在涂层制备过程中,使用了混合喷嘴,采用双丝喷涂工艺。为了提高涂层与基体的结合力,首先在基体上喷涂金属丝材作为粘结层,为提高涂层的耐磨性,又将粉末状的硬质材料喷射到含有大量的熔融丝材的火焰中制备出面层涂层。结果表明,功能梯度涂层是由纯金属部分和含有硬质材料的部分组成,涂层的微观结构、孔隙率和成分按梯度变化,喷涂制备的功能梯度涂层其性能要优于喷涂粉芯丝材制备的涂层。本文研究的目的是根据涂层的位置来设计涂层的沉积过程,从而得到所需涂层的性能。
In this paper, a functional graded coating (FGC) is introduced that gradually differs in composition and properties from a tie layer to a facing layer. In the coating preparation process, the use of hybrid nozzle, the use of double wire spraying process. In order to improve the adhesion between the coating and the substrate, a metal wire is first sprayed on the substrate as an adhesive layer. In order to improve the abrasion resistance of the coating, the powdery hard material is sprayed onto a flame containing a large amount of molten wire In the preparation of the top coat. The results show that the functionally graded coating consists of a pure metal part and a part containing a hard material. The microstructure, porosity and composition of the coating vary with the gradient. The functionally graded coating prepared by spraying has better performance than the powder coating Wire preparation of the coating. The purpose of this study is to design the coating deposition process according to the location of the coating to obtain the desired coating performance.