论文部分内容阅读
利用HVAF超音速火焰喷涂技术制备了Fe40Cr23Mo14C15B6Y2非晶合金涂层。并将涂层在550、600、665、716、760、811℃这6个温度下进行真空热处理。采用X射线衍射仪、差热分析仪、场发射扫描电子显微镜、显微维氏硬度仪、动态极化曲线对涂层进行结构和性能的研究。通过与原始状态下涂层进行对比发现,热处理后涂层会析出Fe、Cr、Mo的碳化物,使得涂层硬度明显升高,而同时也产生贫铬区和孔洞,使得涂层耐腐蚀性能降低。
The Fe40Cr23Mo14C15B6Y2 amorphous alloy coating was prepared by HVAF supersonic flame spraying. The coatings were vacuum heat-treated at 6,650,665,716,760,811 ℃. The structure and properties of the coatings were investigated by X-ray diffractometer, differential thermal analyzer, field emission scanning electron microscope, micro Vickers hardness tester and dynamic polarization curves. By comparing with the original coating, the coating will precipitate Fe, Cr and Mo carbides after heat treatment, which leads to the obvious increase of the hardness of the coating and the low chromium area and holes, which makes the corrosion resistance of the coating reduce.