类金刚石涂层结构对活塞销耐磨特性的影响

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英文篇名：Influence of Structures of Diamond-Like Carbon Coatings on the Wear Resistance of Piston Pin 作者：于璟初 ; 曲睿 ; 岳健鹏 ; 王裕 英文作者：YU Jing-chu;QU Rui;YUE Jian-peng;WANG Yu;School of Energy & Power Engineering,Wuhan University of Technology; 关键词：活塞销 ; 类金刚石涂层(DLC) ; 结构 ; 磨损 英文关键词：piston pin;;diamond-like carbon(DLC) coating;;structure;;wear 中文刊名：CLBH 英文刊名：Materials Protection 机构：武汉理工大学能源与动力工程学院; 出版日期：2019-01-15 出版单位：材料保护 年：2019 期：v.52;No.480 基金：武汉理工大学自主创新研究基金(2018-ND-B1-13)资助 语种：中文; 页：CLBH201901003 页数：5 CN：01 ISSN：42-1215/TB 分类号：16-19+24

摘要

为了提高活塞销表面类金刚石(DLC)涂层的结合力及抗磨损性能,使用扫描电子显微镜、圆度仪、粗糙度仪等检测设备对2种活塞销DLC涂层表面、截面及涂层结合处的微观形貌、组成元素和成分进行了对比分析,并对2种活塞销进行了发动机台架耐久试验。结果表明:原样件活塞销耐久试验后涂层大面积脱落且磨损严重,通过改变工艺参数将原样件活塞销进行优化,优化后的活塞销DLC涂层表面的均匀性、平整性及光滑度都有了明显改善,涂层厚度由1.08μm增加到了1.49μm,且粗糙度Ra值由原样件的0.369μm减小为0.144μm,同时圆柱度也明显减小,耐久试验后涂层完好,没有发生脱落。此研究为提高活塞销表面质量,改善活塞销在工作中的磨损及失效提供了参考。
        In order to improve the binding force and wear resistance of diamond-like carbon( DLC) coating at the pin surface,the surface morphology,cross section morphology,elements and components of two kinds of pin DLC coatings were compared and analyzed by using scanning electron microscope,roundness measuring instrument,roughness measuring instrument and so on. In addition,engine bench endurance test was carried out for the two kinds of pin. Results showed that after endurance test,the primary sample presented large area of piece coating falling off and seriously damaged. By changing technological parameters to optimize the primary piston pin,the uniformity,flatness and smoothness of DLC coating on as-optimized piston pin were evidently improved. The thickness of coating rose from 1.08 μm to 1.49 μm,and the roughness( Ra) decreased from 0.369 μm( the primary sample) to 0.144 μm. Meantime,the cylindricity apparently decreased,and the coating after endurance test maintained complete state without falling off. This work provided a reference for enhancing surface quality of pin and improving the wear and failure during the working conditions of pin.

引文

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