金属掺杂对高强化柴油机活塞销类金刚石薄膜涂层摩擦学性能的影响

doi:10.3969/j.issn.1000-1093.2021.04.005

兵工学报 ›› 2021, Vol. 42 ›› Issue (4): 715-722.doi: 10.3969/j.issn.1000-1093.2021.04.005

金属掺杂对高强化柴油机活塞销类金刚石薄膜涂层摩擦学性能的影响

郭圣刚¹，王建平²，赵忠诚¹，程晶晶²，田新伟¹

（1.潍柴动力股份有限公司内燃机可靠性国家重点实验室，山东潍坊 261001； 2.安徽工程大学机械工程学院，安徽芜湖 241000）

上线日期:2021-06-08
通讯作者: 王建平（1970—），男，研究员，硕士生导师 E-mail:tjqhd@163.com
作者简介:郭圣刚（1978—），男，高级工程师。E-mail: guosheng@weichai.com
基金资助:
内燃机可靠性国家重点实验室开放基金重大项目(Skler-201801)；安徽省教育厅高校自然科学基金项目(KJ2017A122)

The Effect of Metal Doping on the Friction Performance of DLC Coating for Piston Pins of Highly-strengthened Diesel Engine

GUO Shenggang¹, WANG Jianping², ZHAO Zhongcheng¹, CHENG Jingjing², TIAN Xinwei¹

（1.State Key Laboratory of Engine Reliability，Weichai Power Co.,Ltd., Weifang 261001, Shandong, China；2.School of Mechanical Engineering, Anhui Polytechnic University, Wuhu 241000, Anhui, China）

Online:2021-06-08

摘要/Abstract

摘要： 柴油机关键部件活塞销受到周期性的交变机械载荷和热载荷作用，易因粘着导致磨损。为提高柴油机活塞销的摩擦磨损性能，采用磁控溅射方法在活塞销表面沉积了Cr、W、Cr与Ti 3种金属掺杂的类金刚石薄膜(DLC)涂层，运用扫描电镜、X射线衍射仪、能谱仪分析DLC涂层表面微观形貌和结构，并进行摩擦磨损性能和膜-基结合强度测试。结果表明：3种涂层表面微观形貌类似，致密、无明显缺陷和孔洞，但都附着少量的颗粒物，相较而言掺杂Cr的DLC涂层表面更加平滑；掺杂Cr的DLC涂层，Cr以单质和CrC化合物形式存在，具有更高的膜-基结合强度、更优的摩擦学性能；掺杂Cr与Ti的DLC涂层性能与掺杂Cr的DLC涂层类似，Cr、Ti以单质和CrC、TiC化合物的形式存在；掺杂W的DLC涂层，由于生成了WC化合物，涂层脆性高，韧性较差。

关键词: 柴油机活塞销, 金属掺杂涂层, 类金刚石薄膜, 摩擦磨损, 结合强度, 微观形貌

Abstract: The piston pins of diesel engine are subjected to periodically the alternating mechanical and thermal loads, and the abnormal wear and tear often occur due to adhesion. In order to improve the friction and wear performances of piston pin of diesel engine, the diamond-like carbon (DLC) coating of three doped metals (Cr, W, Cr+Ti) was deposited on the surface of piston pin by magnetron sputtering method, the scanning electron microscope (SEM), X-ray diffractometer (XRD) and energy disperse spectroscopy (EDS) were used to analyze the micro-morphologies and structures of different DLC coating surfaces, and the friction and wear properties and film-based bonding strength were tested. The results show that the surface micro-morphologies of the three coatings are similar, their surfaces are dense without obvious defects and holes, but a small amount of particles are formed on the surfaces. Compared with Cr-doped DLC coating, the surface is smoother. For Cr-doped DLC coating, Cr exists as Cr element and Cr C compound, which greatly improves the mechanical properties of Cr; DLC coating doped with Cr has higher film-based bonding strength and better friction performance. The performance of DLC coating doped with C_r and T_i is similar to that of Cr-doped DLC coating. Cr and Ti exist in the form of element and CrC and TiC compounds. W-doped DLC coating has high brittleness and poor toughness due to the formation of WC compound.

Key words: pistonpinofdieselengine, metal-dopedcoating, diamond-likecarbon, frictionandwear, bondstrength, micro-morphology

中图分类号:

TG174.444

郭圣刚，王建平，赵忠诚，程晶晶，田新伟. 金属掺杂对高强化柴油机活塞销类金刚石薄膜涂层摩擦学性能的影响[J]. 兵工学报, 2021, 42(4): 715-722.

GUO Shenggang, WANG Jianping, ZHAO Zhongcheng, CHENG Jingjing, TIAN Xinwei. The Effect of Metal Doping on the Friction Performance of DLC Coating for Piston Pins of Highly-strengthened Diesel Engine[J]. Acta Armamentarii, 2021, 42(4): 715-722.

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金属掺杂对高强化柴油机活塞销类金刚石薄膜涂层摩擦学性能的影响

The Effect of Metal Doping on the Friction Performance of DLC Coating for Piston Pins of Highly-strengthened Diesel Engine

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