Machine tool castings are large metal structural components in machine tool manufacturing, mainly including core parts such as bed frames, columns, beams, and slide tables. They are mostly made of high-strength gray cast iron HT250-300, which features high tensile strength and high wear resistance. Manufactured in accordance with standards such as JB/T3997-94, the production process commonly employs resin sand molding and lost foam casting techniques to achieve castings with high dimensional accuracy and smooth surfaces. Internal stress is eliminated through two artificial aging treatments to maintain structural stability. Their applications span fields such as CNC machine tools, automotive engine components, aerospace equipment, and energy equipment.