采用激光熔覆技术在Q235钢表面原位合成了Mo2NiB2陶瓷涂层。利用扫描电镜和静态浸泡法、电化学方法研究了涂层的显微组织及耐腐蚀性能。结果表明,涂层与基材形成了良好的冶金结合,组织致密,增强相分布较为均匀且无明显的裂纹和孔洞。在3.5%NaCl溶液中,涂层的腐蚀电位明显比基材正移,腐蚀电流密度约为基材的1/4,说明Mo2NiB2陶瓷涂层显著提高了基材的耐腐蚀性能。
The Mo2NiB2 ternary boride ceramic coating was in-situ prepared on the surface of Q235 steel by laser cladding.The microstructure and corrosion behavior of the coating were investigated by SEM,immersion and electrochemical methods.The results showed that the coating exhibited good metallurgical bond at the interface,no obvious cracks and holes were found,and the reinforced phase distribution was uniform.Compared with the substrate,the coating showed one-forth corrosion current density and the corrosion potential shifted positively in 3.5% NaCl solution,indicating that the coating significantly improved the corrosion resistance of the substrate.
参考文献
| [1] | 王永国,李兆前,张荻.新型三元硼化物基金属陶瓷的研究[J].无机材料学报,2003(06):1217-1221. |
| [2] | 刘福田,黄巍玲,李文虎,张英才,李兆前.金属陶瓷覆层-钢基体界面结合状态的研究[J].材料科学与工艺,2005(05):452-455. |
| [3] | 周小平,胡心彬,高博,闫锋.反应烧结三元硼化物金属陶瓷覆层的组织与性能[J].金属热处理,2008(03):73-75. |
| [4] | 刘福田,李兆前,黄传真,常钧,芦令超,程新.三元硼化物基金属陶瓷覆层性能的研究[J].机械工程材料,2003(07):30-34. |
| [5] | Wang Yongguo;Li Zhaoqian .Development of ternary-boride-based hard cladding material[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2002(3):417-423. |
| [6] | 刘宗德,刘辉,侯世香.原位反应合成Mo-Ni-B系三元硼化物熔覆层的研究[J].金属热处理,2009(07):71-75. |
| [7] | Qianlin Wu;Wenge Li .The Microstructure and Wear Properties of Laser-Clad WC-Cr_3C_2 Cermet Coating on Steel Substrate[J].Materials transactions,2011(3):560-563. |
| [8] | 樊丁,李强,张建斌.激光熔覆FeNiCrAl合金涂层的组织与腐蚀性能[J].兰州理工大学学报,2009(02):13-16. |
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