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Quality requirements of cast aluminum parts
- Jan 05, 2018 -

The quality of castings includes appearance quality, intrinsic quality and quality of use. Appearance quality refers to the casting surface roughness, surface defects, size deviation, shape deviation, weight deviation; intrinsic quality mainly refers to the chemical composition of the casting, physical properties, mechanical properties, microstructure and existing in the casting holes, cracks, inclusions, Segregation and other conditions; the use of quality refers to the work of durable cast aluminum parts in different conditions, including wear resistance, corrosion resistance, resistance to shock heat, fatigue, shock absorption and other performance and machinability, weldability and other process performance.

Cast aluminum parts due to many factors, often appear pores, pinholes, slag, cracks, pits and other defects. Commonly used repair equipment for the TIG welding machine, resistance welding machine, cold welding and so on. For the quality and appearance of the less demanding casting defects can be used such as argon arc welding machine heat, welding speed to repair.

The quality of cast aluminum products have a great impact on the performance of mechanical products. For example, the wear resistance and dimensional stability of the machine tool castings, a direct impact on the accuracy of the machine to maintain life; various types of pumps impeller, housing and hydraulic cavity size, shape accuracy and surface roughness, a direct impact on the pump And hydraulic system work efficiency, energy consumption and cavitation development; internal combustion engine cylinder block, cylinder head, cylinder liner, piston ring, exhaust pipe and other cast aluminum strength and resistance to shock heat, a direct impact on the work of the engine life.