采用固体渗碳法,对 CuCoCrNiFe 高熵合金进行850℃/5 h 的渗碳处理。采用 SEM、EDS、EPMA、XRD分析了渗碳后试样的显微组织和相组成,并测量了试样的显微硬度。结果表明,经过渗碳处理后,合金上析出了大量碳化物。在表面附近,碳化物细小,十分密集。距离表面距离增加,碳化物分布密度下降,尺寸增大。试样表层硬度达到240 HV,与基体相比有明显增加。
A high entropy alloy CuCoCrNiFe was treated at 850 ℃ for 5 h by solid carburization.SEM,EDS, EPMA and XRD were employed for microstructural characterization and phase indentification.The measure-ment of hardness of the carburized sample was performed.The results show that after carburization,a large number of carbides precipitate in the sample.Near the sample surface,the carbides are fine and aggregated.As the distance from sample surface increasing,the intensiveness of carbides gets lower,whereas the size increa-ses.The hardness of sample surface rises to 240 HV,which has been improved greatly compared to that of the substrate.
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