40Cr钢表面高焓等离子喷涂Cr_2O_3涂层的性能  

Properties of Cr_2O_3 coating sprayed by high enthalpy plasma on 40Cr Steel

作　　者：方勇[1,2] 伏利 陈小明[1,2] 刘伟 赵坚[1,2] 孟金博 FANG Yong;FU Li;CHEN Xiaoming;LIU Wei;ZHAO Jian;MENG Jinbo(Standard&Quality Control Research Institute,Ministry of Water Resources,Hangzhou 310012,China;Hangzhou Machinery Design&Research Institute,Ministry of water resources,Hangzhou 310012,China;Key Laboratory of Surface Engineering of Equipments for Hydraulic Engineering of Zhejiang Procince,Hangzhou 310012,China)

机构地区：[1]水利部产品质量标准研究所,杭州310012 [2]浙江省水利水电装备表面工程技术研究重点实验室,杭州310012 [3]水利部杭州机械设计研究所,杭州310012

出　　处：《粉末冶金材料科学与工程》2018年第2期217-221,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：浙江省科技计划资助项目(2016C37091);水利部拔尖人才专项(2015132-4)

摘　　要：采用SQC-100高焓等离子喷涂设备在启闭机活塞杆用40Cr钢表面制备Cr_2O_3涂层。对Cr_2O_3涂层的微观组织结构、显微硬度、孔隙率、结合强度、抗磨损性能、电化学性能等进行分析与测试,并分析Cr_2O_3涂层的磨损机理。结果表明:高焓等离子喷涂获得的Cr_2O_3涂层孔隙率为0.81%,平均显微硬度(HV0.2)达1 310.3,结合强度均值为60.6 MPa。摩擦磨损实验表明,Cr_2O_3涂层的质量损失仅为0.001 3 g,基体材料40Cr钢的质量损失为0.101 8 g,涂层的抗摩擦磨损性能为基体材料的78倍,涂层的磨损机理为磨粒磨损和粘着磨损。同时,Cr_2O_3涂层的抗电化学腐蚀能力优于基体材料。利用高焓等离子喷涂制备Cr_2O_3涂层具有优良好的应用前景。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.

关 键 词：高焓等离子喷涂 40CR钢 CR2O3涂层 磨粒磨损 粘着磨损 

分 类 号：TG147[一般工业技术—材料科学与工程]