In addition, some scholars have studied the influence of micro-textured tools with different size parameters on cutting performance. For example, [PERSON] et al. studied the cutting temperature of micro-textured ball end milling cutters with different size parameters when milling the titanium alloy by combining finite element simulation and experimental verification. The optimal parameters of the micro-circular pit texture were obtained as follows: the diameter of the micro-circular pit was 40 microns, pit spacing was 225 microns, the distance from the cutting edge was 100 microns, and the radius of the blunt edge was 60 microns [19]. [PERSON] et al. analyzed the influence of width, spacing, edge distance, and depth of micro-texture on the main cutting force and cutting temperature of the tool when cutting Ti-6 AL-4V. The results showed that when the width of the micro-texture was 40 \(\upmu\)m, the edge distance was 80 \(\upmu\)m, the spacing was 70 \(\upmu\)m, the depth was 20 \(\upmu\)m, and the cutting temperature of the tool was the lowest [20]. There are also some scholars that have conducted relevant research on the distribution mode of micro-textures. [PERSON] et al. simulated the cutting process of cutting Ti-6 Al-4V with micro-textured WC/Co tools by using DEFORM 3D finite element simulation with SAE 40 as a semi-solid lubricant, and studied the influence law of cutting Ti-6 Al-4V with micro-textured tools. Finally, combined with the turning experiment, it was found that the cutting temperature of micro-textured tools decreased to different degrees during the cutting process. This effect was more apparent when cutting with micro-textured tools of the vertical shape [21]. [PERSON] et al. simulated the cutting of medium carbon steel AISI 1045 with micro-textured tools. It was found that the cooling effect of the lateral micro-textured tool was more apparent compared with non-textured tools, and it showed good chip fragility in the process of cutting [22]. To conclude, reasonable shapes, structures, and arrangements of micro-textures on the surface of the tool can reduce the cutting temperature in the actual cutting process. However, for research on the cutting performance of micro-textured tools, the cooling effect of micro-textured tools with different morphologies and size parameters is also different when cutting different materials. At present, most research on cutting materials is focused on titanium alloy, with only a small number of pure iron and medium carbon steel. There is little research on the cutting of GH4169 using micro-structured tools in spray cooling conditions, and there is even less research on the influence of the morphology, size parameters, and arrangement of micro-structured tools on the cutting temperature when cutting GH4169. Based on the above problems, the cutting temperature of GH4169 with micro-textured tools of different morphologies and size parameters was studied by a combination of simulations and experiments in spray cooling. Firstly, five types of micro-textures with different morphologies were designed on the rake face of the tools. The simulation models of the micro-textured tools cutting GH4169 were established and simulated in ABAQUS, and the morphology of the micro-texture with the lowest cutting temperature was selected. Secondly, based on the optimal micro-texture morphology, an orthogonal simulation scheme for micro-texture size parameters was designed, and a cutting simulation was conducted to analyze and select the combination of micro-texture size parameters with the lowest cutting temperature. Finally, the micro-textured tools were processed using a femtosecond laser, and cutting experiments were conducted in spray cooling, which verified the previous simulation analysis results and ultimately obtained the influence of the micro-texture parameters on the cutting temperature. These studies will provide guidance for the efficient machining of GH4169 and the design and application of micro-textured tools.