向永华,陈卓,赵耀,徐富家,崔秀芳,金国,徐滨士.海水环境中钛元素改性铜基激光熔覆层的摩擦行为研究[J].表面技术,2020,49(8):138-144.
XIANG Yong-hua,CHEN Zhuo,ZHAO Yao,XU Fu-jia,CUI Xiu-fang,JIN Guo,XU Bin-shi.Tribological Behaviour of Titanium Modified Copper-based Coating by Laser Cladding in Brine[J].Surface Technology,2020,49(8):138-144
海水环境中钛元素改性铜基激光熔覆层的摩擦行为研究
Tribological Behaviour of Titanium Modified Copper-based Coating by Laser Cladding in Brine
投稿时间:2020-01-21  修订日期:2020-08-20
DOI:10.16490/j.cnki.issn.1001-3660.2020.08.015
中文关键词:  海水环境  表面改性  第二相强化  激光熔覆    铜基涂层  摩擦学行为
英文关键词:brine environment  surface modification  second phase reinforcement  laser cladding  titanium  copper based coating  tribology behavior
基金项目:国家自然科学基金(51775127)
作者单位
向永华 1.中国人民解放军92228部队,北京 100072 
陈卓 2.哈尔滨工程大学,哈尔滨 150001 
赵耀 2.哈尔滨工程大学,哈尔滨 150001 
徐富家 3.哈尔滨焊接研究院有限公司,哈尔滨 150001 
崔秀芳 2.哈尔滨工程大学,哈尔滨 150001 
金国 2.哈尔滨工程大学,哈尔滨 150001 
徐滨士 4.陆军装甲兵学院 装备再制造技术国防科技重点实验室,北京 100072 
AuthorInstitution
XIANG Yong-hua 1.Unit 92228, PLA, Beijing 100072, China 
CHEN Zhuo 2.Harbin Engineering University, Harbin 150001, China 
ZHAO Yao 2.Harbin Engineering University, Harbin 150001, China 
XU Fu-jia 3.Harbin Welding Institute Limited Company, Harbin 150001, China 
CUI Xiu-fang 2.Harbin Engineering University, Harbin 150001, China 
JIN Guo 2.Harbin Engineering University, Harbin 150001, China 
XU Bin-shi 4.Key Laboratory of National Defense Science and Technology of Equipment Remanufacturing Technology, Academy of Army Armored Forces, Beijing 100072, China 
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中文摘要:
      目的 通过激光熔覆作用,使钛元素与铜基合金生成耐磨的第二相组织,提升铜基合金表面在海水环境中的耐磨性能。方法 采用激光熔覆技术在ZQAl9442镍铝青铜合金表面制备均匀的钛元素改性铜基涂层。采用SEM、EDS、XRD、摩擦磨损试验机等检测仪器,对该改性涂层的显微组织、元素分布、硬度以及在大气与海水环境中的摩擦性能进行分析。结果 改性涂层中,因钛元素添加生成了AlCu2Ti相,使得改性涂层的表面硬度在第二相析出强化的作用下得以提升,显微硬度可达(310±10)HV0.3,相比同质修复层,提升了14.8%。在海水环境中,改性涂层的摩擦系数远低于同质修复层。改性涂层在大气环境中的磨损机制为氧化磨损、粘着磨损及磨粒磨损,在海水环境中的磨损机制为磨粒磨损。结论 通过在ZQAl9442铜合金表面进行激光熔覆,得到了兼具高硬度、高耐磨性和抗海水环境摩擦的钛元素改性铜基涂层,在一定程度上提升了镍铝青铜合金在海水环境中的服役寿命。
英文摘要:
      The paper aims to generate a wearable second phase structure by titanium element and copper base alloy to improve the friction performance of copper-based alloy in brine. A titanium modified copper-based coating was fabricated on ZQAl9442 copper alloy via laser cladding. SEM, EDS, XRD and friction and wear tester were used to analyze the microstructure, element distribution, hardness and friction performance of the modified coating. The AlCu2Ti phase was generated due to the addition of titanium element in the modified coating, which improved the surface hardness of the modified coating under the action of the second phase precipitation strengthening. The microhardness of the modified coating was up to (310±10)HV0.3, 14.8% higher than that of the homogeneous repair layer. The friction coefficient of the modified coating in brine was much lower than that of the NAB coating. The wear mechanism of modified coating in atmospheric environment was oxidation wear, adhesive wear and abrasive wear, while the wear mechanism in seawater environment was abrasive wear. Through laser cladding on the surface of ZQAl9442 copper alloy, the titanium-modified copper-base modified coating with high hardness, high wear resistance and resistance to marine environment friction was obtained, which can improve the service life of copper alloy in marine environment to some extent.
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