热辐射粒子参数测量系统的喷涂方法和材料适用性的研究

Applicability of Particle Parameter Diagnostic System Based on Thermal Radiation and Thermal Spraying Processes and the Related Materials

针对自行开发的基于窗口调制与比色测温技术的热喷涂参数测量系统,研究了常用喷涂方法和喷涂材料对有效信号的平均强度和单次采样捕获有效粒子数的影响,检验了其适用性。结果表明,本系统对等离子喷涂(APS)的适用性良好,可用于常用金属与陶瓷粉末粒子的参数测量,而超音速火焰喷涂(HVOF)尽管也适用于大多数合金与金属陶瓷粉末的测量,但仍表现出一定的材料选择性,有必要采用更高灵敏度的光敏器件以进一步改善该系统对不同喷涂方法和材料的适用性。

The effects of thermal spraying process and the relevant materials on the average voltage level of effective signal pulses and the number of captured effective particles in a single sampling process of thermal spraying were experimentally studied using a parameter measurement system based on window-modulating velocimetry and 2-color pyrometry. The applicability of the measurement system and materials was verified. The results showed that the system was suitable for the measurement of commonly used metallic and ceramic powders subject to plasma spraying process. Unfortunately, although the system was applicable to most of the spraying materials subject to high velocity oxy-fuel flame (HVOF) spraying process, it was unsuitable to some specific materials in this respect. Therefore, it could be imperative to use light-sensitive transducers with higher sensitivity to improve the applicability of the system to different spraying processes and materials.