CrNi3MoVA钢表面过滤阴极真空电弧沉积DLC膜的性能
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摘要
为提高特种机械零件的耐磨性和耐腐蚀性,采用过滤阴极真空电弧技术在其表面沉积了一层厚度约为2μm的类金刚石碳(DLC)膜。利用扫描电子显微镜(SEM)、纳米压痕仪、摩擦磨损试验机和电化学工作站分别测试了CrNi3MoVA钢与施加DLC膜的CrNi3MoVA钢(以下简称DLC膜)的微观结构、纳米力学性能、摩擦磨损性能及耐腐蚀性。结果表明DLC膜的硬度较裸钢提高了65%,弹性模量降低了约32%;裸钢稳定的摩擦系数为0.65～0.75,而DLC膜稳定的摩擦系数仅为0.10～0.11;裸钢的磨损机制主要为磨粒磨损和塑性流动,而DLC膜的磨损机制主要为剥层磨损;DLC膜的腐蚀电流密度较裸钢的腐蚀电流密度低了两个数量级,自腐蚀电位正移了逾0.3V,电化学反应阻抗高了3个数量级。DLC膜能够极大地提高裸钢的耐磨性和耐腐蚀性。
A layer of diamond-like carbon(DLC)film with a thickness of about 2μm was deposited on special machine parts surface by means of filtering cathodic vacuum arc technology to improve its wear resistance and corrosion resistance.The microstructure,nano-mechanical properties,friction and wear performance and corrosion resistance of CrNi3 MoVA and CrNi3 MoVA coated with DLC film(hereinafter referred to as DLC film)were tested by employing scanning electron microscope(SEM),nanoindenter,friction and wear tester and electrchemical workstation.The results showed that the hardness of the DLC film increase about 65%than that of the bare steel and the elasticity modulus reduced about 32%;the steady friction of the bare steel was 0.65-0.75 whilst that of the DLC film only 0.10-0.11;the wear mechanism of the bare steel was mainly abrasion wear and plastic flowing while that of the DLC film delamination wear;in contrast to bare steel,the corrosion current density of the DLC film reduced by two orders of magnitude,the corrosion potential shifted more than 0.3 Vto the positive direction and the electrochemical impedance increased by three orders of magnitude.The DLC film can greatly improve wear resistance and corrosion resistance of the bare steel.
A layer of diamond-like carbon(DLC)film with a thickness of about 2μm was deposited on special machine parts surface by means of filtering cathodic vacuum arc technology to improve its wear resistance and corrosion resistance.The microstructure,nano-mechanical properties,friction and wear performance and corrosion resistance of CrNi3 MoVA and CrNi3 MoVA coated with DLC film(hereinafter referred to as DLC film)were tested by employing scanning electron microscope(SEM),nanoindenter,friction and wear tester and electrchemical workstation.The results showed that the hardness of the DLC film increase about 65%than that of the bare steel and the elasticity modulus reduced about 32%;the steady friction of the bare steel was 0.65-0.75 whilst that of the DLC film only 0.10-0.11;the wear mechanism of the bare steel was mainly abrasion wear and plastic flowing while that of the DLC film delamination wear;in contrast to bare steel,the corrosion current density of the DLC film reduced by two orders of magnitude,the corrosion potential shifted more than 0.3 Vto the positive direction and the electrochemical impedance increased by three orders of magnitude.The DLC film can greatly improve wear resistance and corrosion resistance of the bare steel.
引文
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[3] Robertson J.Diamond-like amorphous carbon[J].Materials Science&Engineering Reports,2002,37(4):129-281.
[4] Erdemir A,Donnet C.Tribology of diamond-like carbon films:recent progress and future prospects[J].Journal of Physics D:Applied Physics,2006,39(18):311-327.
[5] Yong Qingsong,Wang Haidou,Xu Binshi,et al.Research status of the tribological property of diamond-like carbon films[J].Journal of Mechanical Engineering,2016,52(11):95-107(in Chinese).雍青松,王海斗,徐滨士,等.类金刚石薄膜摩擦机理及其摩擦学性能影响因素的研究现状[J].机械工程学报,2016,52(11):95-107.
[6] Xiong Liwei,Peng Huanyang,Zhang Ying,et al.Tribological properties and application of diamond-like carbon film[J].Surface Technology,2016,45(1):80-88(in Chinese).熊礼威,彭环洋,张莹,等.类金刚石薄膜的摩擦性能及其应用[J].表面技术,2016,45(1):80-88.
[7] Chen Qingyun,Shi Kaimin,Su Minhua,et al.Progress of diamond-like carbon films[J].Journal of Materials Engineering,2017,45(3):119-128(in Chinese).陈青云,施凯敏,苏敏华,等.类金刚石膜研究进展[J].材料工程,2017,45(3):119-128.
[8] Tang Kun,Zhu Yongjian,Tan Kecheng,et al.Effects of heating temperature on mechanical properties of Ni-P/Ti/DLC multilayer films[J].Surface Technology,2018,47(7):52-58(in Chinese).唐昆,朱勇建,谭可成,等.加热温度对Ni-P/Ti/DLC多层膜力学性能的影响[J].表面技术,2018,47(7):52-58.
[9] Zhao Long.A study on the strengthen reason of certain big gun tube material[D].Nanjing:Nanjing University of Science&Technology,2007(in Chinese).赵隆.某炮钢材料的强化机理研究[D].南京:南京理工大学,2007.
[10] Cheng J,Liu D,Liang X,et al.Evolution of microstructure and mechanical properties of in situ synthesized TiCTiB2/CoCrCuFeNi high entropy alloy coatings[J].Surface&Coatings Technology,2015,281(7):109-116.
[11] Leyland A,Matthews A.On the significance of the H/E,ratio in wear control:a nanocomposite coating approach to optimised tribological behaviour[J].Wear,2000,246(1-2):1-11.
[12] Ipaz L,Caicedo J C,Esteve J,et al.Improvement of mechanical and tribological properties in steel surfaces by using titanium aluminum/titanium aluminum nitride multilayered system[J].Applied Surface Science,2012,258(8):3805-3814.
[13] Donnet C.Recent progress on the tribology of doped diamond-like and carbon alloy coatings:a review[J].Surface&Coatings Technology,1998,100-101:180-186.
[14] Chu P K,Li L.Characterization of amorphous and nanocrystalline carbon films[J].Materials Chemistry and Physics,2006,96(2-3):253-277.
[15] Nery R P O S,Bonelli R S,Camargo S S.Evaluation of corrosion resistance of diamond-like carbon films deposited onto AISI 4340steel[J].Journal of Materials Science,2010,45(20):5472-5477.