1. Gray cast iron has good shock absorption. Use gray cast iron to make base or frame of CNC machine, such as dynamometer cast iron lathe plates, they can effectively absorb the energy of machine vibration, thereby playing the role of damping, which is also the most important performance of gray cast iron.

2. Gray cast iron has good thermal conductivity. When gray cast iron is used to make the cylinder block and cylinder head of an internal combustion engine, a large amount of heat can be quickly discharged to ensure the normal operation of CNC machine.

3. Gray cast iron has good lubrication performance. When using gray cast iron to make parts that are subject to sliding friction on CNC machine, it has good anti-wear performance. In the presence of moisture, graphite is a good lubricant, which is also one of the important conditions for gray cast iron as a good wear-resistant material.

4. When gray cast iron is repeatedly loaded under the same stress, the number of loading times increases, the bending degree of the strain curve is obviously reduced, and the residual plastic deformation after unloading is also reduced. The cast iron lathe plate takes advantage of this feature to obtain high casting stability by preloading a certain number of times before finishing.

5. Gray cast iron has good characters of casting and cutting, and its melting temperature is lower compared with cast steel. Then the melting equipment and melting process are relatively simple. In terms of casting performance, the fluidity of gray cast iron is great, the casting is not easy to crack.

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