Aluminum castings are made of pure aluminum or aluminum alloy ingots

The direct shortcomings of aluminum castings are generally caused by incorrect mold and die-casting plans; or unreasonable structural planning of Lian castings, incorrect operation methods, and incorrect casting process conditions; unskilled operators, etc. We should be careful not to purchase defective aluminum castings when purchasing them. Overheating of the mold part will cause cracks. Therefore, the selection of aluminum castings under the same load conditions can reduce the weight of the structure.

Aluminum castings are made of pure aluminum or aluminum alloy ingots according to the standard composition, and then artificially heated to turn them into aluminum alloy liquid or molten state, and then through professional molds or corresponding processes, the aluminum liquid or molten aluminum alloy is poured into The cavity is cooled to form an aluminum casting with the required shape. They can also have one or more special functions, such as wear resistance, high temperature and low temperature resistance, and corrosion resistance.

The cold iron has shrinkage holes on the surface; The main feature of the shortcomings of aluminum castings is cracks .The time when the mold is cooled out 6. Poor pouring system planning ； How to prevent pore bubbles: 1. It is simply presented when the volume of the casting is shortened and the thermal expansion coefficient is large. Heat treatment crack: It is often caused by heat treatment overburning or overheating, which often presents transcrystalline cracks. The mold and sand core are poorly ventilated; Correctly live and work at the heat treatment temperature and reduce the quenching cooling rate.

Poor concession of sand mold (core)Casting Automotive Mould Foundry will also cause cracks. Pure aluminum has outstanding corrosion resistance in oxidizing acid media such as nitric acid and acetic acid, so aluminum castings are also useful in the chemical industry. Make. Aluminum alloy has outstanding surface gloss and excellent corrosion resistance in the atmosphere and fresh water, so it has a wide range of uses in the production of civil utensils.

Correctly grasp the pouring speed to prevent the gas from being involved; Wait. When the casting is taken out of the mold too early, the thermal correction method should be used when the casting is deformed. The reasons for the formation of pores and bubbles: This constitutes a direct disadvantage of aluminum castings. The method of increasing the concession of sand mold (core) should be adopted. If they are purchased, they must be corrected in time.