Experimental Study of the Microstructure and Micromechanical Properties of Laser Cladded Ni-based Amorphous Composite Coatings
Experimental Study of the Microstructure and Micromechanical Properties of Laser Cladded Ni-based Amorphous Composite Coatings
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激光熔覆镍基非晶复合涂层显微组织与显微机械性能的实验研究
DOI：
10.1007/s11665-017-3066-z
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发表时间：
2017
影响因子：
2.3
通讯作者：
Chuan Liu
中科院分区：
文献类型：
--
作者：
Ruifeng Li;Qichi Zheng;Yanyan Zhu;Zhuguo Li;Kai Feng;Chuan Liu
采用同轴送粉激光熔覆技术，在AISI 1045钢基体上成功制备了（Ni 0.6Fe 0.4）65 B18 Si 10 Nb 4C 3非晶复合涂层。利用X射线衍射仪、扫描电镜和透射电镜对涂层的显微组织和相分布进行了分析。采用显微硬度计和纳米压痕仪对涂层的力学性能进行了测试。实验结果表明，随着激光熔覆热输入的降低，非晶相的体积分数增加，导致平均显微硬度和纳米硬度提高。NbC颗粒的尺寸范围在150和1650 nm之间被发现嵌入在所有情况下的非晶复合涂层。NbC颗粒的存在下，可以有助于提高96.7 HV的硬度的实验结果的基础上，而理论预测表明，通过使用Orowan-Ashby方程的92.5 HV的改善。
(Ni0.6Fe0.4)65B18Si10Nb4C3amorphous composite coating was successfully fabricated on AISI 1045 steel substrate by using laser cladding process with coaxial powder feeding equipment. The microstructure and phase distribution of the coating were investigated by using x-ray diffraction, scanning electron microscopy and transmission electron microscope. The mechanical properties of the coating were examined by using microhardness testing and nanoindentation. The experimental results indicated that the volume fraction of amorphous phase increased with the decrease in laser cladding heat input, leading to an improvement of mean microhardness and nanohardness. NbC particles in a size ranging between 150 and 1650 nm were found embedding in the amorphous composite coatings in all situations. The presence of the NbC particles can contribute to an improvement of 96.7 HV in hardness on the basis of experimental results, while theoretical prediction suggests an improvement of 92.5 HV by using Orowan-Ashby equation.
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影响因子：
4.4
作者：
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影响因子：
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DOI：
10.1016/j.msea.2009.04.022
发表时间：
2009-08
影响因子：
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作者：
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