激光熔覆Ni基WC/Cr<sub>3</sub>C<sub>2</sub>涂层显微组织和耐蚀性研究

薛敏鹏; 韩彬; 王勇; 刘兴光

doi:doi:10.3788/lop48.091403

激光与光电子学进展, 2011, 48 (9): 091403, 网络出版: 2011-07-25

激光熔覆Ni基WC/Cr₃C₂涂层显微组织和耐蚀性研究

Microstructures and Corrosion Resistance Properties of Ni-Based WC/Cr₃C₂ Coating Prepared by Laser Cladding

论文大纲

薛敏鹏 ^*韩彬王勇刘兴光

作者单位

中国石油大学机电工程学院，山东东营 257061

激光技术激光熔覆 Ni基WC/Cr3C2熔覆层显微组织耐蚀性 laser technique laser cladding Ni-based WC/Cr3C2 cladding layer microstructure corrosion resistance

摘要

利用大功率CO2激光器在45钢表面激光熔覆制备Ni基WC/Cr3C2涂层。使用电子探针（EPMA）、X射线衍射仪（XRD）、扫描电镜（SEM）和M352电化学测试系统对熔覆层成分、物相组成、显微组织和耐蚀性进行研究。结果表明，Ni基WC/Cr3C2熔覆层表面光亮无裂纹，润湿性和脱渣性良好。熔覆层主要由Cr2Ni3、γ-（Fe，Ni）、Ni17W3、Fe0.64Ni0.36、WC、Cr7C3和CrSi2等物相组成。熔覆层底部为发达的树枝晶，树枝晶和枝晶间都含有大量的Fe元素；中部为γ-（Fe，Ni）基体上分布着大量长条状碳化物Cr7C3以及少量零散分布的菊花状硅化物CrSi2等强化相；顶部组织与中部相似，但晶粒更加细小致密。Ni基WC/Cr3C2熔覆层自腐蚀电位为-395.9 mV，自腐蚀电流密度为2.75 μA/cm2，耐蚀性较Ni基WC涂层明显提高。

Abstract

Ni-based WC/Cr3C2 composite coating is produced on 1045 steel substrates by high-power CO2 laser. The chemical composition, phase composition, microstructures and corrosion resistance of the cladding layer are analyzed respectively by electron probe microanalyzer (EPMA), X-ray diffractometer (XRD), scanning electron microscope (SEM) and M352 electrochemical measurement system. The results show that the surface of the Ni-based WC/Cr3C2 cladding layer is bright and crack free, and the wettability and slag detachability are excellent. The cladding layer is mainly composed of Cr2Ni3, γ-(Fe, Ni), Ni17W3, Fe0.64Ni0.36, WC, Cr7C3 and CrSi2. Dentrite is highly developed on the bottom of the cladding layer, with abundant Fe elements distributed in the dendritic and interdendritic grains. The central zone are plenty of long strip shape Cr7C3 and some chrysanthemum-like CrSi2 distributed on the γ-(Fe, Ni) base. The microstructures of the top zone are similar to the central zone′s, but the grains are finer and denser. The corrosion potential and corrosion current density of Ni-based WC/Cr3C2 cladding layer are respectively -359.9 mV and 2.75 μA/cm2, which indicates that the corrosion resistance of the cladding layer is improved obviously compared with Ni-based WC cladding layer.

参考文献

[1] 刘勇, 田保红, 刘素芹. 先进材料表面处理和测试技术［M］. 北京: 科学出版社, 2008. 107～109

Liu Yong, Tian Baohong, Liu Suqin. Advanced Technologies of Materials Surface Processing and Testing［M］. Beijing: Science Press, 2008. 107～109

[2] 钟敏霖, 刘文今. 国际激光材料加工研究的主导领域与热点［J］. 中国激光, 2008, 35(11): 1653～1659

Zhong Minlin, Liu Wenjin. Leading areas and hot topics on global laser materials processing research［J］. Chinese J. Lasers, 2008, 35(11): 1653～1659

[3] 敬晓定, 晁明举, 孙海勤等. 原位生长Cr3C2-CrB复合增强镍基激光熔覆层研究［J］. 中国激光, 2009, 36(1): 231～237

Jing Xiaoding, Chao Mingju, Sun Haiqin et al.. Investigation on in-situ synthesis of Cr3C2-CrB reinforced Ni-based composite coatings by laser cladding［J］. Chinese J. Lasers, 2009, 36(1): 231～237

[4] 张现虎, 晁明举, 梁二军等. 激光熔覆原位生成TiC-ZrC颗粒增强镍基复合涂层［J］. 中国激光, 2009, 36(4): 998～1004

Zhang Xianhu, Chao Mingju, Liang Erjun et al..In-situ synthesis of TiC-ZrC particulate reinforced Ni-based composite coatings by laser cladding［J］. Chinese J. Lasers, 2009, 36(4): 998～1004

[5] 孙荣禄, 杨贤金. 45钢表面激光熔覆NiCrBSi涂层的组织和摩擦磨损性能［J］. 材料工程, 2005, (8): 20～24

Sun Ronglu, Yang Xianjin. Microstructure and tribological properties of NiCrBSi laser cladding on 45 steel substrate［J］. Material Engineering, 2005, (8): 20～24

[6] 吴萍, 姜恩永, 赵慈等. 激光参数对Ni基熔覆层结构及耐磨性的影响［J］. 焊接学报, 2003, 24(2): 44～48

Wu Ping, Jiang Enyong, Zhao Ci et al.. Influence of laser parameters on microstructure and tribological properties of Ni-based cladding layers［J］. Transactions of the China Welding Institution, 2003, 24(2): 44～48

[7] K. Van Acker, D. Vanhoyweghen, R. Persoons et al.. Influence of tungsten carbide particle size and distribution on the wear resistance of laser clad WC/Ni coatings［J］. Wear, 2005, 258(1-4): 194～202

[8] 吴新伟, 曾晓雁, 朱蓓蒂等. 镍基碳化钨金属陶瓷激光熔覆层开裂性的研究［J］. 中国激光, 1997, 24(6): 570～576

Wu Xinwei, Zeng Xiaoyan, Zhu Beidi et al.. Research on crack resistance of Ni based WC cremet laser cladding layer［J］. Chinese J. Lasers, 1997, 24(6): 570～576

[9] 李慕勤, 马臣, 尹柯等. Ni-WC-Re组合粉喷焊层的磨损和腐蚀行为［J］. 焊接学报, 1996, 17(1): 7～12

Li Muqin, Ma Chen, Yin Ke et al.. Abradability and corrosion resistance of spray-welding layers of Ni-WC-Re combination powder［J］. Transactions of the China Welding Institution, 1996, 17(1): 7～12

[10] 李晶, 钟敏霖, 刘文今等. 55Mn钢表面激光熔覆原位析出颗粒增强Ni基复合涂层的组织与性能［J］. 金属热处理, 2006, 31(11): 8～12

Li Jing, Zhong Minlin, Liu Wenjin et al.. Microstructures and properties of laser-cladding in-situ particle reinforced Ni-base composite coating on 55Mn steel［J］. Heat Treatment of Metals, 2006, 31(11): 8～12

[11] 斯松华, 徐锟, 袁晓敏等. 激光熔覆Cr3C2/Co基合金复合涂层组织与摩擦磨损性能研究［J］. 摩擦学学报, 2006, 26(2): 125～129

Si Songhua, Xu Kun, Yuan Xiaomin et al.. Investigation on the microstructure and tribological performance of laser cladding Cr3C2/Co based compound coating［J］. Tribology, 2006, 26(2): 125～129

[12] Huang Zhenyi, Hou Qingyu, Wang Ping. Microstructure and properties of Cr3C2-modified nickel-based alloy coating deposited by plasma transferred arc process［J］. Surface & Coatings Technology, 2008, 202(13): 2993～2999

[13] Guo Chun, Zhou Jiansong, Chen Jianmin et al.. Improvement of the oxidation and wear resistance of pure Ti by laser cladding at elevated temperature［J］. Surface & Coatings Technology, 2010, 205(7): 2142～2151

薛敏鹏, 韩彬, 王勇, 刘兴光. 激光熔覆Ni基WC/Cr₃C₂涂层显微组织和耐蚀性研究[J]. 激光与光电子学进展, 2011, 48(9): 091403. Xue Minpeng, Han Bin, Wang Yong, Liu Xingguang. Microstructures and Corrosion Resistance Properties of Ni-Based WC/Cr₃C₂ Coating Prepared by Laser Cladding[J]. Laser & Optoelectronics Progress, 2011, 48(9): 091403.

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