摘要
采用等离子喷涂和超音速火焰喷涂工艺在汽轮机动叶片1COMoVNbN母材上制备了WC-Co防护涂层。利用X射线衍射仪、扫描电子显微镜和高温冲蚀试验机等技术研究了涂层的相结构、表面形貌、孔隙率以及抗高温氧化和抗固体微粒侵蚀性能。结果表明,超音速火焰喷涂相比于等离子喷涂所制备的涂层中,WC相含量较多,涂层致密,孔隙率小。超音速火焰喷涂制备的含17%Co的WC-Co涂层相比于母材具有较好的抗高温氧化和抗固体微粒侵蚀性能。
WC-Co protective coating were prepared on the 1Cr9MoVNbN of turbine blade by means of plasma spraying and high velocity oxyfuel spraying (HVOF). The phase structure, surface appearance, porosity, high temperature oxidation resistance and anti-erosion performance of the coating were studied by X-ray diffraction, scanning electron microscopy and so on. The results showed that the coating prepared by HVOF has much more compact, less porosity, more WC phase than that prepared by plasma spraying. The WC -Co coating with 17% Co in content by HVOF has better high temperature oxidation resistance and impingement corrosion resistance performance than the base metal of 1Cr9MoVNbN.
出处
《焊接》
北大核心
2010年第10期33-36,共4页
Welding & Joining
关键词
超音速火焰喷涂
涂层
抗冲蚀性
high velocity oxy-fuel spraying (HVOF), coating, impingement corrosion resistance
