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题是质量不稳定,涂层在很大范围内波动,有的 X—40涂层叶片可以工作2～3年,有的仅工作1～2个月就完全崩落失效。产生这种现象的原因不仅与烟机运行水平(主要指烟气内催化剂浓度、超温现象)有关,而且与 X—40涂层的本质有关。X—40涂层的硬度不高,抗蚀性尚不能完全满足烟机要求。X—40涂层不适用于大功率烟机叶片工作条件。国内对于6000～10000kW 大功率烟气轮机,叶片材料选用 Ni 基合金 GH864(即 Waspaloy),涂层材料选用北京科技大学等单位研制的长城一
The problem is the quality is not stable, the coating fluctuates in a wide range, and some X-40 coated leaves can work for 2 to 3 years, and some work only 1 to 2 months to completely collapse failure. The reason for this phenomenon is not only related to the operation of the hood (mainly the concentration of catalyst in the flue gas, over-temperature phenomenon), but also the nature of X-40 coating. X-40 coating hardness is not high, corrosion resistance still can not fully meet the requirements of the hood. X-40 coating is not suitable for high-power tobacco leaves working conditions. Domestic for 6000 ~ 10000kW high-power gas turbine, blade material selection Ni-based alloy GH864 (ie Waspaloy), the coating material selected Beijing University of Science and other units of the Great Wall a