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Casting quality
Nov 16, 2018

It mainly includes appearance quality, intrinsic quality and quality of use. Appearance quality refers to the surface roughness, surface defects, dimensional deviation, shape deviation and weight deviation of the casting; the intrinsic quality mainly refers to the chemical composition, physical properties, mechanical properties, metallographic structure of the casting, and the holes, cracks, inclusions existing in the casting. Segregation and other conditions; the use of quality refers to the working durability of the casting under different conditions, including wear resistance, corrosion resistance, chilling heat, fatigue, shock absorption and other properties as well as machinability, weldability and other process properties.

Casting quality has a major impact on the performance of mechanical products. For example, the wear resistance and dimensional stability of machine tool castings directly affect the accuracy of the machine tool to maintain the life; the size of the impeller, the housing and the internal cavity of the hydraulic pump, the accuracy of the profile and the surface roughness directly affect the pump. And the hydraulic system's working efficiency, energy consumption and cavitation development; the strength of the internal combustion engine cylinder block, cylinder head, cylinder liner, piston ring, exhaust pipe and other castings and the resistance to chilling heat, directly affect the working life of the engine.

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