| 激光熔覆Ni基WC/Cr_3C_2涂层显微组织和耐蚀性研究 |
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| 引用本文： | 薛敏鹏,韩彬,王勇,刘兴光. 激光熔覆Ni基WC/Cr_3C_2涂层显微组织和耐蚀性研究[J]. 激光与光电子学进展, 2011, 0(9) |
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| 作者姓名： | 薛敏鹏 韩彬 王勇 刘兴光 |
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| 作者单位： | 中国石油大学机电工程学院; |
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| 基金项目： | 中央高校基本科研业务费专项资金(10CX04026A); 中国石油大学(华东)研究生创新基金(S10-17)资助课题 |
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| 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2.75μA/cm2,耐蚀性较Ni基WC涂层明显提高。
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| 关 键 词： | 激光技术 激光熔覆 Ni基WC/Cr3C2熔覆层 显微组织 耐蚀性 |
Microstructures and Corrosion Resistance Properties of Ni-Based WC/Cr_3C_2 Coating Prepared by Laser Cladding |
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| Xue Minpeng Han Bin Wang Yong Liu Xingguang. Microstructures and Corrosion Resistance Properties of Ni-Based WC/Cr_3C_2 Coating Prepared by Laser Cladding[J]. Laser & Optoelectronics Progress, 2011, 0(9) |
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| Authors: | Xue Minpeng Han Bin Wang Yong Liu Xingguang |
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| Affiliation: | Xue Minpeng Han Bin Wang Yong Liu Xingguang(College of Mechanical and Electronic Engineering,China University of Petroleum,Dongying,Shandong 257061,China) |
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| 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... |
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| Keywords: | laser technique laser cladding Ni-based WC/Cr3C2 cladding layer microstructure corrosion resistance |
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