Who is more efficient in aluminum die casting compared to gravity casting?
Release time:2024-01-29
Who is more efficient in casting-china.com' target='_blank'>aluminum die casting compared to gravity casting?
Compared with gravity casting, aluminum alloy die casting, in addition to high production efficiency and low mass production cost, useful performance is not as good as gravity casting. Aerospace aluminum alloy die casting and major automotive parts in Europe and the United States are gravity casting production.
Because die casting technology can not meet the high internal performance requirements of aluminum alloy. The surface finish of aluminum alloy die casting is very high, the dimensional accuracy is high, and the partial size of the die casting can often be directly assembled without post-processing. The die casting has dense structure, high mechanical strength and resistance .Tensile strength and bending strength are much higher than gravity casting. That's a good thing.
However, the internal stress of the die casting is large, the toughness is poor, the impact resistance is poor, and the thermal shock resistance is also poor. Due to the large number of pores inside the die casting, it is impossible to improve the internal stress and the relationship between strength and toughness through heat treatment. When the closed workpiece is pressurized, die casting .
There will be air leakage, water leakage or oil leakage. Therefore, in the case of high requirements for the safety and reliability of the workpiece, the die casting is difficult to be competent. Die castings are typical of gold and jade.Of course, there are still many occasions with low safety requirements for the workpiece, such as the shell, the box, etc., with the high strength and low cost of die casting, it is still widely used.
In addition, I would like to add that some parts of European and American automobiles use gravity casting, which is a design concept of safety priority; Some parts of Japanese automobiles are produced by low-pressure casting and even aluminum alloy die-casting, which is the design concept of low cost
