反应等离子喷涂抽油机光杆C/TiNC涂层的力学性能  

Mechanical properties of C/TiNC coating on pole of reactive plasma spraying pumping unit

作　　者：韩福勇[1] 倪攀[1] 胡阳明[2] 王琴[1] HAN Fuyong;NI Pan;HU Yangming;WANG Qin(Tianjin Petroleum Vocational and Technical College,Tianjin 301607,China;Research Institute of Petroleum Technology,Petro China Changqing Oilfield Branch,Xi’an 710018,China)

机构地区：[1]天津石油职业技术学院,天津301607 [2]中国石油长庆油田分公司油气工艺研究院,西安710018

出　　处：《粉末冶金材料科学与工程》2019年第6期515-522,共8页Materials Science and Engineering of Powder Metallurgy

基　　金：中国石油与天然气股份有限公司华北油田分公司科技项目(2016-HB-G09)

摘　　要：针对油田抽油机光杆容易出现腐蚀、磨损失效等问题,采用以廉价的石墨或炭黑粉为碳源与微米级Ti粉混合制备成适于喷涂的复合粉,送入含氮的高温等离子焰流,Ti与C、N发生自蔓延反应合成纳米TiCN涂层。通过在涂层中添加Cr、Mo等元素,形成微米−纳米多尺度结构的复合涂层,从而降低纳米TiCN涂层的应力。结果表明:C/TiCN复合涂层,硬度达到1500 HV以上,高于镀硬Cr层;涂层结合强度大于25 MPa;涂层厚度大于300μm。解决了纳米涂层硬度、韧性的倒置问题,得到具有良好强韧配合、耐磨减摩性能优良的涂层替代光杆表面的镀铬层,达到延长抽油机光杆和盘根的使用寿命和降低抽油机能耗的目的。In order to solve the problems of corrosion and wear failure of polished rod of oil field pumping unit,nano-TiCN coating was synthesized by mixing cheap graphite or carbon black powder with micro-Ti powder,feeding into high temperature plasma flame containing nitrogen,and self-propagating reaction of Ti with C and N.By adding elements such as Cr and Mo into the coating,a composite coating with micron-nano multi-scale structure is formed,which can reduce the stress of nano-TiCN coating.The results show that the hardness of C/TiCN composite coating is more than 1500 HV,higher than that of hard Cr coating,the bonding strength of coating is more than 25 MPa,and the thickness of coating is more than 300μm.The problem of inversion of hardness and toughness of nano-coating was solved,and the chromium plating layer on the surface of polished rod was replaced by a coating with good toughness,wear resistance and abrasion resistance,so as to prolong the service life of polished rod and disk root of oil field pumping unit and reducing the consumption of pumping unit.

关 键 词：基体预处理 C/TiNC涂层 反应等离子喷涂 光杆 防腐耐磨 

分 类 号：TG174.44[金属学及工艺—金属表面处理]