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与典型的耐磨防护材料(如金属陶瓷)相比,铁基材料不仅对人体更健康、更具有环境友好性,而且在材料成本和加工费用方面,其经济效益也更明显。当喷涂粉末的粒度非常细时(小于15um),所获得的涂层表面更光滑,而且能获得相对较薄的、致密的、接近净成形的涂层。这就会降低涂层材料及加工的费用。本研究采用大气等离子(APS)喷涂粒度为5~15um的铁基细粉制备印刷行业耐磨防护涂层。为了避免细的铁基粉末在喷涂过程中的氧化问题,本研究设计并制备了一个防护罩。在APS设备上安装了这种特殊的防护罩以防止铁基材料的氧化;本文对所制备涂层的显微组织、显微硬度、化学成分、相组成和表面粗糙度进行了分析,同时介绍了这种涂层所产生的经济效益。
Iron-based materials are not only healthier and more environmentally friendly than typical abrasion-resistant materials such as cermets, but they are also more economical in terms of material costs and processing costs. When the particle size of the sprayed powder is very thin (less than 15 μm), the resulting coating surface is smoother and a relatively thin, dense, nearly net-shaped coating is obtained. This will reduce the cost of coating materials and processing. In this study, wear-resistant protective coating for the printing industry was prepared by spraying iron-based fine powder with particle size of 5 ~ 15um by atmospheric plasma (APS). In order to prevent the oxidation of fine iron-based powders during spraying, a protective cover was designed and prepared in this study. This special protective cover is installed on the APS equipment to prevent the oxidation of the iron-based material. In this paper, the microstructure, microhardness, chemical composition, phase composition and surface roughness of the prepared coating are analyzed and introduced The economic benefits of this coating.