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材料工程  2013 

不同热喷涂技术制备铁基涂层摩擦学性能研究

DOI: 10.3969/j.issn.1001-4381.2013.10.008, PP. 48-52

Keywords: 铁基涂层,热喷涂,摩擦磨损,残余应力

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Abstract:

采用高速电弧喷涂(HVAS)、超音速等离子喷涂(HEPJ)、爆炸喷涂(DGS)三种工艺喷涂技术,制备了铁基涂层。借助X射线应力测定仪、CETR摩擦磨损试验机、纳米测试仪等工具,考察了三种涂层表面残余应力场与(211)晶面半高宽,研究涂层在室温下的摩擦磨损性能。结果表明爆炸喷涂(DGS)制备的铁基涂层相对于另外两种涂层具有更好的耐磨性,主要原因为爆炸喷涂(DGS)制备的同种材料的涂层表面表现为残余压应力,纳米硬度较大,晶粒较小,涂层致密。涂层表面的残余应力与涂层的摩擦性能有很好的对应关系,晶粒细化与涂层表面晶格畸变的增加可以有效地提高涂层的耐磨性能。

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