M_2高速钢渗氮-PVD复合涂层微观结构及力学性能分析
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摘要
针对锌挤压成型对模具提出抗粘接、抗重载摩擦磨损和长寿命的苛刻要求,该文提出了渗氮+PVD复合涂层解决方案.通过对比研究各种涂层微观结构和力学性能,以及涂层模具使用寿命等数据得出:AlCrN涂层由fcc-AlCrN固溶体组成,且渗氮预处理促进了(111)_(AlCrN)择优取向的形成.渗氮层及AlCrN/渗氮层界面元素扩散改善了AlCrN层结合力,提高了AlCrN层承载能力.高的结合力及承载能力使得渗氮-AlCrN复合涂层具有更低的摩擦系数.渗氮-AlCrN复合涂层磨损机理是氧化和粘附磨损,而AlCrN涂层磨损机理为氧化、粘附、断裂和剥落.复合涂层模具的使用寿命比AlCrN涂层模具和渗氮模具的使用寿命更高.
In view of the harsh requirements of bonding resistance,heavy load friction and wear resistance and long life for zinc alloy stamping forming,the solution of nitriding PVD composite coating is presented in the paper.By comparing the microstructure and mechanical properties of various coatings,as well as the service life of the coating dies,the following results are obtained:the fcc-AlCrN solid solution is the composition of the AlCrN coating,and the nitriding pretreatment promotes the formation of the preferred orientation of(111)_(AlCrN).The interfacial element diffusion of nitriding layer and AlCrN/nitriding layer improves the adhesion of AlCrN layer.In addition,the nitriding layer also improves the bearing capacity of AlCrN layer.Because of the high adhesion and bearing capacity, the nitriding/AlCrN composite coating has lower friction coefficient.The wear mechanism of nitriding/AlCrN composite coating is oxidation and adhesion wear,while the wear mechanism of AlCrN coating is oxidation,adhesion,fracture and exfoliation.The service life of compound coating mould is longer than that of AlCrN coating mould and nitriding mould.
In view of the harsh requirements of bonding resistance,heavy load friction and wear resistance and long life for zinc alloy stamping forming,the solution of nitriding PVD composite coating is presented in the paper.By comparing the microstructure and mechanical properties of various coatings,as well as the service life of the coating dies,the following results are obtained:the fcc-AlCrN solid solution is the composition of the AlCrN coating,and the nitriding pretreatment promotes the formation of the preferred orientation of(111)_(AlCrN).The interfacial element diffusion of nitriding layer and AlCrN/nitriding layer improves the adhesion of AlCrN layer.In addition,the nitriding layer also improves the bearing capacity of AlCrN layer.Because of the high adhesion and bearing capacity, the nitriding/AlCrN composite coating has lower friction coefficient.The wear mechanism of nitriding/AlCrN composite coating is oxidation and adhesion wear,while the wear mechanism of AlCrN coating is oxidation,adhesion,fracture and exfoliation.The service life of compound coating mould is longer than that of AlCrN coating mould and nitriding mould.
引文
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[15] Lee S C,Ho W Y,Pao W L.Process and properties of CrN coating deposited on plasma nitrided high-speed steel [J].Surf Coat Technol,1995,73(1/2):34-38.
[16] Chen Wanglin,Zheng Jie,Lin Yue,et al.Comparison of AlCrN and AlCrTiSiN coatings deposited on the surface of plasma nitrocarburized high carbon steels [J].Applied Surface Science,2015,332:525-532.
[2] 张道达,尧登灿,张海军.不同的离子渗氮工艺对20CrMnTi钢的渗氮层的影响 [J].南昌大学学报:工科版,2016,38(1):84-88.
[3] 郑洁.离子氮碳共渗-AlCrN复合涂层制备工艺及力学性能研究 [D].马鞍山:安徽工业大学,2016.
[4] 张道达,孙衍乐,姚学峰,等.大变形轧制超细晶TWIP钢的组织及性能研究 [J].江西师范大学学报:自然科学版,2017,41(1):62-66.
[5] 王永光,陈瑶,陆小龙,等.40Cr 钢表面渗氮及制备CrN涂层在重载低速下的摩擦学性能 [J].表面技术,2018,49(2):71-76.
[6] Makino Y.Prediction of phase change in pseudobinary transition metal aluminum nitrides by band parameters method [J].Surf Coat Technol,2005,193(1/2/3):185-191.
[7] Chen Wanglin,Zheng Jie,Meng Xianna,et al.Investigation on microstructures and mechanical properties of AlCrN coatings deposited on the surface of plasma nitrocarburized cool-work tool steels [J].Vacuum,2015,121:194-201.
[8] Zheng Jie,Zhang Shihong,Wu Peng,et al.Microstructures and mechanical properties of duplex-treated composite ceramic coatings with and without compound layer [J].Ceramics Internationa,2015,141(2):2519-2526.
[9] Chen Wanglin,Zhang Daoda,Yao Dengcan,et al.TEM study on the vein-like grain boundary structures in nitrocarburized cool-work tool steels and its formation mechanism [J].Surface and Coatings Technology,2017,324:376-381.
[10] Wang Lei,Zhang Shihong,Chen Zhong,et al.Influence of deposition parameters on hard Cr-Al-N coatings deposited by multi-arc ion plating [J].Appl Surf Sci,2012,258(8):3629-3636.
[11] Ali M,Hamzah E,Qazi I A,et al.Effect of cathodic arc PVD parameters on roughness of TiN coating on steel substrate [J].Curr Appl Phys,2010,10(2):471-474.
[12] Lee D B,Nguyen T D,Kim S K.Air-oxidation of nano-multilayered CrAlSiN thin films between 800 ℃ and 1 000 ℃ [J].Surf Coat Technol,2009,203(9):1199-1204.
[13] Chen Wanglin,Mao Taojie,Zhang Baiyong,et al.Designs and preparation of advanced HVOF-PVD duplex coating by combination of HVOF and arc ion plating [J].Surface and Coatings Technology,2016,304:125-133.
[14] Bell T,Mao Ken,Sun Yong.Surface engineering design:modelling surface engineering systems for improved tribological performance [J].Surf Coat Technol,1998,108/109(1):360-368.
[15] Lee S C,Ho W Y,Pao W L.Process and properties of CrN coating deposited on plasma nitrided high-speed steel [J].Surf Coat Technol,1995,73(1/2):34-38.
[16] Chen Wanglin,Zheng Jie,Lin Yue,et al.Comparison of AlCrN and AlCrTiSiN coatings deposited on the surface of plasma nitrocarburized high carbon steels [J].Applied Surface Science,2015,332:525-532.