Ni/G含量对TiN-Ni/G复合涂层抗泥浆冲蚀性能的影响  

Effect of Ni/G Content on Anti-Slurry Erosion Performance of TiN-Ni/G Composite Coatings

作　　者：刘佳宁 田芸 王雨馨 姜洁 王晶[1] 董艳春[1] 杨勇[1] 何继宁[1] Liu Jianing;Tian Yun;Wang Yuxin;Jiang Jie;Wang Jing;Dong Yanchun;Yang Yong;He Jining(School of Materials Science and Engineering,Hebei University of Technology,Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology,State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Key Laboratory for New Type of Functional Materials in Hebei Province,Tianjin 300132,China)

机构地区：[1]河北工业大学材料科学与工程学院,天津市层状复合及界面控制技术重点实验室,电气设备可靠性与智能化国家重点实验室,河北省新型功能材料重点实验室,天津300132

出　　处：《稀有金属材料与工程》2023年第5期1826-1834,共9页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51372065);河北省自然科学基金(E2015202190,E2021202130)。

摘　　要：等离子喷涂涂层中不可避免存在残余应力和微裂纹,为了减少TiN涂层的残余应力,在等离子喷涂TiN涂层中添加了Ni/G,在45#钢表面制备了TiN-Ni/G复合涂层。研究了Ni/G含量对涂层的微观组织、显微硬度以及抗冲蚀性能的影响,并分析了涂层在不同pH值泥浆中的冲蚀机理。结果表明:TiN-Ni/G复合涂层的平均显微硬度值在9800 MPa(1000 HV_(0.2))左右,在质量分数5%NaCl泥浆冲蚀过程中涂层受到SiO_(2)颗粒的冲击以及溶液的腐蚀;pH=10的NaOH泥浆对涂层冲蚀表现为SiO_(2)冲击作用。涂层在含NaOH泥浆中的质量损失较中性溶液有明显减少,在2种冲蚀液中Ni/G质量分数为11%时涂层都表现出良好的抗冲蚀性能。Residual stress and microcracks inevitably exist in plasma spraying coatings.In order to reduce the residual stress of the TiN coating prepared by reactive spraying,Ni/G was added to the TiN coating.TiN-Ni/G composite coatings were prepared on the surface of 45#steel.The effects of Ni/G content on the microstructure,microhardness and erosion resistance of the coating were studied,and the erosion mechanism of coatings in slurries with different pH values was analyzed.The results show that the average microhardness of the TiN-Ni/G composite coating is about 9800 MPa(1000 HV_(0.2)),and coatings are impacted by SiO_(2) particles and corroded by the solution during the erosion process in 5wt%NaCl slurry.The coating is mainly subjected to the impact of SiO_(2) during the erosion process in the NaOH slurry at pH=10,and the mass loss of the coating in NaOH slurry is significantly reduced compared with that in the neutral solution.When the Ni/G content is 11wt%,the coatings show good impact resistance.

关 键 词：TiN-Ni/G复合涂层 泥浆冲蚀 显微硬度 等离子喷涂 

分 类 号：TG174.42.1[金属学及工艺—金属表面处理]