What are the methods and characteristics of aluminum die casting for you

What are the methods and characteristics of aluminum die casting for you? Aluminum alloy die casting is completed in a very short time filling process, it is easy to cause gas roll and affect the quality of die casting. For this reason, oxygenated die casting machines and aluminum alloy die casting machines have been developed, and medium pressure die casting machines have also been developed rapidly, and some aluminum die casting manufacturers have adopted skew forms. Die casting process automation and die casting computer control and die casting flexible machining unit (FMC) are also gradually developed.

(1) Oxygen pressure casting is to fill the pressure chamber and the cavity with oxygen before the aluminum metal liquid fills the cavity to replace the air and other gases in it. Its characteristics are: eliminate or reduce the porosity, improve the quality of castings; Simple structure, convenient operation, less investment.

(2) Vacuum pressure casting is to first remove the air in the die casting cavity, and then press into the liquid metal. It is characterized by eliminating or reducing the porosity inside the die casting, improving the mechanical function and surface quality of the casting; When die casting, the back pressure of the cavity is greatly reduced, and lower specific pressure and alloys with poor casting function can be used.

Advantages of aluminum alloy die casting

① Aluminum alloy die casting method can eliminate or reduce the porosity inside the die casting, improve the mechanical function and surface quality of the die casting, and improve the plating function.

② Aluminum alloy die casting method greatly reduces the back pressure of the cavity, can use a lower specific pressure and casting function of the poor alloy, it is possible to use a small machine die casting larger castings.

③ Aluminum alloy die casting method improves the filling conditions and can die cast thinner castings.

④ Aluminum alloy die casting method and ordinary die casting method compared, the production power is almost the same.

Main features: After tempering treatment, it has outstanding comprehensive mechanical function, low temperature impact toughness and low notch sensitivity, excellent hardenability, higher fatigue strength can be obtained when oil is cooled, the parts with mixed shape are easy to crack when water is cooled, the cold bending plasticity is medium, the cutting workability is good after tempering or tempering, but the weldability is not good, easy to crack. Before welding, it should be preheated to 100 ~ 150℃, generally used in the state of tempering, and can also be carbonitriding and high-frequency surface quenching treatment.