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How to improve the quality of aluminum alloy rod

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Update time : 2023-01-28 17:44:32

Selection of alloy composition in aluminum alloy rod:

1. Selection of metal cable content

Aluminum alloy composition has a very wide range, the specific composition in addition to consider the mechanical properties, processing properties, but also consider the surface treatment performance, that is, how to carry out surface treatment and to get what kind of surface.

2. Influence of impurity elements

Two, aluminum alloy melting

1. Control the melting temperature

Aluminum alloy smelting is one of the most important processes in the production of high quality rods. If the process is not properly controlled, slag inclusion, pores, coarse grains, feather crystals and other casting defects will be generated in the cast, so it must be strictly controlled.

2. Selection of excellent flux and appropriate refining process

3. Grain refinement

Three, aluminum alloy casting

1. Choose a reasonable casting temperature

2. When conditions permit, fully preheat, dry flow trough, shunt plate and other casting systems to prevent the reaction of water and aluminum liquid resulting in H2 absorption

3. In casting, avoid turbulence and rolling of liquid aluminum as far as possible. Do not easily stir the liquid aluminum in the flow trough and shunt tray with tools, so that the liquid aluminum can flow smoothly into the crystallizer under the protection of the surface oxide film.

4. Filtration of liquid aluminum is the most effective way to remove non-metallic slag in liquid aluminum

Four, the homogenization of aluminum alloy

There are two problems in the internal microstructure of aluminum alloy bars produced by casting: casting stress between grains;

An imbalance in the chemical composition of a grain caused by nonequilibrium crystallization.

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