How Are Cast Aluminum Parts Made？

Aluminum castings have low cost, good manufacturability, remelting and regeneration to save resources and energy, and the application and development of them are enduring. Sand casting is preferred for aluminum castings, mainly because sand casting is lower in cost than other casting methods, simple in production technology, and short in production cycle. Aluminum castings are made of pure aluminum or aluminum alloy ingots according to the standard composition ratio. After artificial heating, they are turned into aluminum alloy liquid or molten state, and then aluminum liquid or molten aluminum alloy is poured through professional molds or corresponding processes. A process in which aluminum parts of the required shape are formed after cooling into the cavity. Commonly used aluminum casting methods are: sand casting, die casting, low pressure casting, precision casting, permanent mold, lost foam casting, etc. Aluminum castings have excellent mechanical and physical properties. It can have a variety of different strength, hardness, toughness and comprehensive properties, and it can also have one or more special properties, such as wear resistance, high temperature and low temperature resistance, and corrosion resistance. Wait.

Aluminum castings have a wide range of weight and casting size. The lightest weight is only a few grams, the highest weight can reach 400 tons, the thickness of the thinnest is only 1 mm, the maximum thickness can be up to 1 meter, and the length can be several millimeters. More than ten meters, can meet the requirements of different industrial sectors. Generally, for the appearance quality of aluminum castings, comparison samples can be used to judge the surface roughness of aluminum castings; fine cracks on the surface can be inspected by coloring method and magnetic powder method. The internal quality of aluminum castings can be inspected and judged by audio, ultrasonic, eddy current, X-ray and gamma-ray methods. The quality of aluminum castings has a great influence on the performance of mechanical products. For example, the wear resistance and dimensional stability of machine tool aluminum castings directly affect the accuracy and maintenance life of the machine tool; the size of the impeller, housing and hydraulic parts of various pumps, the accuracy of the molding line and the surface roughness, directly affect The working efficiency of pumps and hydraulic systems, energy consumption and the development of cavitation, etc.; the strength and resistance of aluminum castings such as internal combustion engine cylinder blocks, cylinder heads, cylinder liners, piston rings, exhaust pipes, etc., directly affect the operation of the engine life.

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