Properties of Cr2O3 coating sprayed by high enthalpy plasma on 40Cr Steel
FANG Yong1,3, FU Li1,3, CHEN Xiaoming1,3, LIU Wei2,3, ZHAO Jian1,3, MENG Jinbo2,3
1. Standard & Quality Control Research Institute, Ministry of Water Resources, Hangzhou 310012, China;
2. Hangzhou Machinery Design & Research Institute, Ministry of water resources, Hangzhou 310012, China; <br/>3. Key Laboratory of Surface Engineering of Equipments for Hydraulic Engineering of Zhejiang Procince, Hangzhou 310012, China
Abstract：The Cr2O3 coatings were sprayed by SQC-100 high enthalpy plasma spray on the surface of 40Cr steel for piston rod of hoist. The microstructure, micro-hardness, porosity, bonding strength, anti-wear performance and electrochemical performance were characterized. The results show that, the porosity of Cr2O3 coating obtained by high enthalpy plasma spraying is 0.81%, the average microhardness (HV0.2) is 1 310.3, and the average bonding strength is 60.6 MPa. Friction and wear experiment show that, the mass loss of the Cr2O3 coating is only 0.001 3 g, the mass loss of the 40Cr steel is 0.101 8 g. The anti-wear property of the coating is 78 times to the stainless steel matrix. The wear mechanism of Cr2O3 coating is abrasive wear and adhesive wear. The Cr2O3 coating has stronger electrochemical corrosion resistance than the matrix. The Cr2O3 coatings sprayed by plasma have a good application prospect.
[1] 曾晨. 等离子喷涂制备纳米Cr2O3涂层的研究[C]. 赣州: 江西理工大学, 2011. ZENG Chen.Preparation of nano Cr2O3 coating by plasma spraying[C]. Ganzhou: Jiangxi University of Science and Technology, 2011. [2] 王博, 陈秋旭, 刘鸿喜, 等. 热喷涂技术提高活塞杆耐磨和耐腐蚀的方法[J]. 液压气动与密封, 2013, 33(10): 59-61. WANG Bo, CHEN Xuqiu, LIU Hongxi, et al.Method to improve the wear and corrosion resistance of piston rods by thermal spray[J]. Hydraulics Pneumatics & Seals, 2013, 33(10): 59-61. [3] 肖卫东. 活塞杆局部表面耐磨耐蚀处理技术的试验研究[C].无锡: 江南大学, 2008. XIAO Weidong.The experimental research of wear corrosion resistant technology for partial surface of the piston rod[C]. Wuxi: Jiangnan University, 2008. [4] Parker D W, Kutner G L.HVOF-spray technology-poised for growth[J]. Advanced Materials & Processes, 1991, 141(4): 68-74. [5] 吴燕明, 陈小明, 赵坚. 表面工程与再制造——热喷涂替代电镀铬的研究和应用[M]. 中国水利水电出版社, 2016: 60-61. WU Yanming, CHEN Xiaoming, ZHAO Jian.Surface engineering and remanufacturing-the research and application of thermal spray instead of electroplating chromium[M]. China Water Power Press, 2016: 60-61. [6] 伏利, 陈小明, 赵坚, 等. WC/Co复合涂层微观结构及磨损性能研究[J]. 热加工工艺, 2014, 43(20): 103-105. FU Li, CHEN Xiaoming, ZHAO Jian, et al.Study on microstructure and wear properties of WC/Co coating[J]. Hot Working Technology, 2014, 43(20): 103-105. [7] 汤精明, 姜忠宇. 表面完整性对40Cr钢耐腐蚀性的影响[J].热加工工艺, 2010, 39(2): 100-103. TANG Jingming, JIANG Zhongyu.Influence of surface integrality on corrosion resistance of 40Cr steel[J]. Hot Working Technology, 2010, 39(2): 100-103. [8] 陈学定, 韩文政. 表面涂层技术[M]. 北京: 北京机械工业出版社, 1994: 180-182. CHEN Xueding, HAN Wenzheng.Surface coating technology [M]. Beijing: Beijing Machinery Industry Press, 1994: 180-182. [9] Hakan Cetinel, Erdal Celik, Murat Kusoglu.Tribological behavior of Cr2O3 coatings as bearing materials[J]. Journal of Materials Processing Technology, 2008, 196(1/3): 259-265. [10] 伏利, 陈小明, 吴燕明, 等. 高焓等离子制备WC/Co复合涂层性能研究[J]. 材料导报, 2014, 28(24): 456-458. FU Li, CHEN Xiaoming, WU Yanming, et al.Analysis of Microstructue and wear properties of high-enthalpy plasma sprayed WC/Co coating[J]. Materials Review, 2014, 28(24): 456-458. [11] HNKS A, KWON O K.Tribological behavior of plasma sprayed chromium oxide coating[J]. Wear, 1999, 225(4): 814-824. [12] WINKLER R.316L-an alternative to NiCr bond coats for Cr2O3 coatings on anilox rolls[C]// Marple B R, Moreau C. Thermal Spray: Advancing the Science & Applying the Technology. Ohio: ASM Park, 2003: 149-152. [13] 郭兴伍, 苏启, 杜挺. 等离子喷涂Cr2O3陶瓷涂层的摩擦磨损性能研究[J]. 宇航材料工艺, 1996(5): 38-41. GUO Xingwu, SU Qi, DU Ting.Investigation on the wear behavior of plasma sprayed Cr2O3 ceramic coatings[J]. Aerospace Materials & Technology, 1996(5): 38-41. [14] OUYANG J H, SASAKI S.Effects of different additives on microstructure and high-temperature tribological properties of plasma-sprayed Cr2O3 ceramic coatings[J]. Wear, 2001, 249(1/2): 56-67. [15] CELIK E, TEKMEN C, OZDEMIR I, et al. Effects on performance of Cr2O3 layers produced on Mo/cast-iron materials [J]. Surface and Coatings Technology, 2003, 174-175(3): 1074-1081.
2018, Vol. 23 
