添加CeO_(2)对激光熔覆Ni基/WC复合涂层的影响  

Effect of CeO_(2)addition on laser cladding Ni-based/WC composite coatings

作　　者：梁飞龙[1,4] 李凯玥 师文庆 朱志凯 何启浪[2] LIANG Feilong;LI Kaiyue;SHI Wenqing;ZHU Zhikai;HE Qilang(School of Shipping and Ocean Transportation,Guangdong Ocean University,Zhanjiang 524005,China;School of Electronics and Information Engineering,Guangdong Ocean University,Zhanjiang 524088,China;School of Materials Science and Engineering,Guangdong Ocean University,Yangjiang 529500,China;Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching,Zhanjiang 524088,China)

机构地区：[1]广东海洋大学船舶与海运学院,湛江524005 [2]广东海洋大学电子与信息工程学院,湛江524088 [3]广东海洋大学材料科学与工程学院,阳江529500 [4]广东省南海海洋牧场智能装备重点实验室,湛江524088

出　　处：《激光技术》2024年第4期542-548,共7页Laser Technology

基　　金：国家自然科学基金资助项目(62073089);广东省教育厅普通高校重点领域专项资金资助项目(2020ZDZX2061)。

摘　　要：为了提高Q235钢材在海水中的耐腐蚀性能,扩大其应用场合,使其能够服役于富含Cl离子的海洋环境,采用激光熔覆技术,在Q235钢表面制备出添加不同质量分数CeO_(2)改性的Ni基/WC复合熔覆层,并利用扫描电镜、能谱仪和电化学工作站等仪器对熔覆层的组织与性能进行了测试。结果表明,适量CeO_(2)的加入可以促进晶粒细化与组织的均匀分布,提高熔覆层在NaCl溶液(质量分数为3.5%)中的耐腐蚀性能;当添加的CeO_(2)质量分数达到1%时,熔覆层具有最高的平均硬度与最好的耐海水腐蚀性能;过高的CeO_(2)含量则会加剧电偶腐蚀效应,降低其耐腐蚀性能。该研究为后续在Q235钢材表面制备耐腐蚀的激光熔覆合金涂层、改善合金材料表面性能提供了理论参考依据。In order to improve the corrosion resistance of Q235 steel in seawater and to prolong its service life in marine environment,Ni-based/WC composite cladding layer with different mass fraction CeO_(2)was prepared on Q235 steel by laser cladding technology.The microstructure,microhardness,and electrochemical corrosion properties in NaCl solution(mass fraction of 3.5%)of the coatings were characterized by using scanning electron microscopy,energy dispersive spectroscopy,X-ray diffraction,microhardness tester,and electrochemical workstation,respectively.The results show that the addition of an appropriate amount of CeO_(2)promoted grain refinement and a uniform distribution of the microstructure,thereby enhancing the hardness and corrosion resistance of the coatings in NaCl solution.When the mass fraction of CeO_(2)adds reached 1%,the coating exhibites the highest average hardness and the best resistance to seawater corrosion.This study provides a theoretical reference for subsequent laser cladding preparation of coatings resistant to seawater corrosion.

关 键 词：激光技术 复合涂层 激光熔覆 氧化铈 电化学腐蚀 

分 类 号：TN249[电子电信—物理电子学] TG174.4[金属学及工艺—金属表面处理]