Machine tool castings have also become large castings. They are the main products of Hezhu Heavy Industry. The machine tool castings produced by our company have good wear resistance, good shock absorption performance and good process performance. High quality and long service life.
The characteristics of machine tool castings are: Since graphite in cast iron is good for lubrication and oil storage, it has good wear resistance. Also, the shock absorption due to the presence of graphite is superior to steel. Because gray cast iron has a high carbon content and is close to the eutectic composition, the melting point is relatively low, the fluidity is good, and the shrinkage rate is small, so it is suitable for casting complex or thin-walled castings. In addition, since graphite is easy to form chip breaking during cutting, the machinability of gray cast iron is superior to that of steel.
Heat treatment of machine tool castings: As a large casting, bed castings must be heat treated to improve their performance and improve the intrinsic quality of cast iron castings. Metal heat treatment is one of the important processes in mechanical manufacturing. Compared with other processing methods, heat treatment generally does not change the shape and overall chemical composition of the workpiece, but changes the microstructure inside the workpiece or changes the chemical composition of the surface of the workpiece. , to give or improve the performance of the workpiece. It is characterized by improved internal quality of the workpiece.