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应用分形几何学方法,研究了不同路径间距条件下的堆焊再制造层表面形貌,用表面分形维数对堆焊再制造层表面质量进行了表征。结果表明:堆焊再制造层表面在一定尺度范围内具有分形特性,分形维数很好地表征了材料表界面的粗糙和复杂、不规则程度,是一个能够反映出表面内禀特性的特征参数,可以用分形维数来表征堆焊再制造层的表面质量;不同路径间距条件下的堆焊再制造层表面分形维数不同,路径间距越接近理论最佳值,堆焊再制造层表面分形维数越大,表面质量也越高。该方法可为进一步研究堆焊再制造层表面质量,以及优化堆焊熔敷成形再制造工艺参数提供定量依据。
The fractal geometry method was used to study the surface topography of the overlay and remanufactured layer under the different path spacing conditions. The surface fractal dimension was used to characterize the surface quality of the overlay remanufactured layer. The results show that the surface of the remanufactured surfacing layer has fractal characteristics within a certain range of dimensions. The fractal dimension well characterizes the roughness, complexity and irregularity of the material surface. It is a characteristic parameter that can reflect the intrinsic properties of the surface , The fractal dimension can be used to characterize the surface quality of the overlay remanufactured layer; the surface fractal dimension of the overlay remanufactured layer with different path spacing is different, the closer the path spacing to the theoretical optimum value, the surface fractal of the overlay remanufactured layer The larger the dimension, the higher the surface quality. The method can provide a quantitative basis for further studying the surface quality of the remanufactured surfacing layer and optimizing the process parameters of the surfacing welding deposition forming and remanufacturing.