Effect of Molybdenum on the Microstructures and Properties of Stainless Steel Coatings by Laser Cladding
Effect of Molybdenum on the Microstructures and Properties of Stainless Steel Coatings by Laser Cladding
复制标题
钼对激光熔覆不锈钢涂层组织和性能的影响
DOI：
10.3390/app7101065
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发表时间：
2017-10
影响因子：
2.7
通讯作者：
Lei Yongping
中科院分区：
文献类型：
--
作者：
Wang Kaiming;Chang Baohua;Chen Jiongshen;Fu Hanguang;Lin Yinghua;Lei Yongping
利用6kW光纤激光器在45钢基材表面沉积了不同钼含量的不锈钢粉末。利用扫描电子显微镜、电子探针、X射线衍射仪、显微硬度计、磨损试验机和电化学测试技术，研究了不同钼含量涂层的组织、物相、显微硬度、磨损性能和耐蚀性。结果表明，不锈钢涂层与基材之间实现了良好的冶金结合。随着涂层中Mo含量的增加，M7(C，B)3型碳化物的数量减少，M2B和M23(C，B)6型碳化物的数量增加。随着Mo含量的增加，马氏体量逐渐减少，而铁素体逐渐增多。当Mo含量为4.0wt.%时，涂层中出现Mo2C相。含钼涂层的显微组织比不含钼的涂层细小。随着Mo含量的增加，涂层的显微硬度逐渐降低，耐磨性逐渐提高。6.0wt.%Mo涂层的耐磨性约为无Mo涂层的3.7倍。随着Mo含量的增加，涂层的耐蚀性先增加后降低。当Mo含量为2.0wt.%时，涂层的耐蚀性最好。
Stainless steel powders with different molybdenum (Mo) contents were deposited on the substrate surface of 45 steel using a 6 kW fiber laser. The microstructure, phase, microhardness, wear properties, and corrosion resistance of coatings with different Mo contents were studied by scanning electron microscopy (SEM), electron probe microanalyzer (EPMA), X-ray diffraction (XRD), microhardness tester, wear tester, and electrochemical techniques. The results show that good metallurgical bonding was achieved between the stainless steel coating and the substrate. The amount of M7(C, B)3 type borocarbide decreases and that of M2B and M23(C, B)6 type borocarbides increases with the increase of Mo content in the coatings. The amount of martensite decreases, while the amount of ferrite gradually increases with the increase of Mo content. When the Mo content is 4.0 wt. %, Mo2C phase appears in the coating. The microstructure of the coating containing Mo is finer than that of the Mo-free coating. The microhardness decreases and the wear resistance of the coating gradually improves with the increase of Mo content. The wear resistance of the 6.0 wt. % Mo coating is about 3.7 times that of the Mo-free coating. With the increase of Mo content, the corrosion resistance of the coating firstly increases and then decreases. When the Mo content is 2.0 wt. %, the coating has the best corrosion resistance.
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影响因子：
2.3
作者：
Q. Zeng;J. Sun;W. Emori;S. L. Jiang
通讯作者：
Q. Zeng;J. Sun;W. Emori;S. L. Jiang
基体晶体取向对镍基高温合金激光粉末沉积晶体生长和微观结构形成的影响
影响因子：
9.4
作者：
Liu, Zhaoyang;Qi, Huan
通讯作者：
Qi, Huan
高Cr含量激光熔覆FeCrBSi复合粉末涂层的组织与性能
影响因子：
6.3
作者：
S Zhao;W Gao;C Zhou;F Liu...
通讯作者：
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影响因子：
5
作者：
H. Ronkainen;Simo Varjus;K. Holmberg
通讯作者：
H. Ronkainen;Simo Varjus;K. Holmberg
影响因子：
2.8
作者：
Xu, G. J.;Kutsuna, M.
通讯作者：
Kutsuna, M.