How to improve the uneven quality of precision castings

Nowadays, the quality of precision castings is uneven. Generally speaking, there will be an oxide film on the surface of precision castings. The oxide film diaphragm is the key reason for reducing the mechanical properties of materials and the key reason for casting. In order to improve the mechanical properties of materials and castings Due to the relative density, we need to reduce or eliminate the oxide film diaphragm in the aluminum alloy profile solution.

During the entire process of aluminum alloy smelting, the oscillation of the liquid oxide film should be minimized. However, the thermal convection and mixing of the metal material below the liquid surface will not easily cause the oxide film to be involved; using a gas generator cleaning solution is also a good choice for metal material liquids The floating resin adsorbs the oxide film, but the solution should be to reduce the rotation rate as much as possible to reduce the damage effect of the liquid oxide film to a low level; when using the pouring bag method, use a teapot mouth pouring bag to alleviate the oscillation of the liquid oxide film ; When using low-pressure casting processing technology, if the liquid flow can be maintained stably into the concave mold, the mechanical properties of the casting itself will be significantly higher than those made using basic processing technology; in process technology, it is necessary to ensure that the liquid flow of metal materials in the gating system The flow is stable and will not cause a flow field, so the bottom injection method can be used.

In addition, precision casting factories should pay attention to the quality of aluminum alloy profile ingots when producing castings.