超音速火焰喷涂Cr3C2-NiCr涂层性能及其在金属硬密封球阀上的应用  

Performances and Application on the Metal Seal Ball Valve of CrC-NiCr Coating Deposited by High Velocity Oxygen Fuel Spray Process

作　　者：黄宇生 柏洪武[2] 邱晓来 高昆 刘长生 王汉洲 HUANG Yu-sheng;BAI Hong-wu;QIU Xiao-lai;GAO Kun;LIU Chang-sheng;WANG Han-zhou(Hunan Aircraft Maintenance Engineering Technology Research Center,Changsha 200240,China;Chongqing Industry Polytechnic College,Chongqing 401120,China;Chaoda Valve Group Co.,Ltd.,Wenzhou 325105,China)

机构地区：[1]湖南省飞机维修工程技术研究中心,湖南长沙200240 [2]重庆工业职业技术学院,重庆401120 [3]超达阀门集团股份有限公司,浙江温州325105

出　　处：《材料保护》2020年第9期50-55,共6页Materials Protection

基　　金：浙江省重点研发计划项目“高端装备特种合金材料研发及应用-苛刻工况阀门用特种复合耐磨材料的研发及应用”(2019C01090);湖南省飞机维修工程技术研究中心项目“镁合金表面复合体涂层构筑机理研究”(YC1915)资助。

摘　　要：为了提高零件的抗磨和防腐蚀性能,采用超音速火焰喷涂工艺在30CrMo钢基体上制备了Cr3C2-Ni Cr涂层;测试了该涂层的基本物理以及抗磨损和腐蚀性能等性能,并采用扫描电镜观察了涂层的显微组织和磨损腐蚀后的形貌。结果表明:Cr3C2-Ni Cr粉末在喷涂过程中生产了少量的Cr7C3脱碳相,所制备Cr3C2-Ni Cr涂层组织结构致密、硬度高、与基体的结合强度高。与30CrMo钢相比,Cr3C2-Ni Cr涂层表现出较优异的抗腐蚀磨粒磨损性能。将该涂层在阀门上进行应用,取得了很好的使用效果。In order to increase the wear and corrosion resistance of the mechanical parts,a Cr3C2-Ni Cr coating was deposited on the 30 CrMo steel by using high velocity oxygen fuel process.The basic physical properties,wear resistance and corrosion resistance of the coating were tested.In addition,the microstructure as well as wear and corrosion morphologies of the Cr3C2-Ni Cr coating was observed by scanning electron microscopy.Results showed that the Cr3C2-NiCr powders could form a slight of Cr7C3 phase during the spraying process.The obtained Cr3C2-Ni Cr coating possessed a dense microstructure,high micro-hardness and good bond strength between the coating and the substrate.In the comparison of 30 CrMo steel,the Cr3C2-Ni Cr coating exhibited much better abrasive wear and corrosion resistance.The application of the Cr3C2-Ni Cr coating on the valve achieved a very satisfied result.

关 键 词：超音速火焰喷涂 CR3C2-NICR涂层 磨粒磨损 腐蚀 阀门 

分 类 号：TG174.442[金属学及工艺—金属表面处理]