Casting quality mainly includes the appearance quality, internal quality and use of the quality.
Appearance quality refers to the casting surface roughness, surface defect, size deviation, deviation of shape, and weight deviation; Inner quality mainly refers to the chemical composition, physical properties, mechanical properties of castings, microstructure and exists in the casting internal hole, crack, inclusion, segregation, and so on and so forth; Use quality refers to the casting endurance ability to work under different conditions, including the wear-resisting, corrosion resistance, resistance to chilling induced fever, fatigue, shock absorption performance, and such as are cutting resistance, weldability and so on process performance.
Casting quality has a great influence on the performance of mechanical products. For example, the wear resistance and dimensional stability of machine tool castings, directly affect the precision of the machine tool to keep life. The leaf ? of all kinds of pump