Explain in detail the casting method of aluminum rod steps for you

1. Choose the correct casting temperature
The correct casting temperature is also an important factor to produce high quality aluminum bars. The forging defects such as coarse grain and feather crystal are easy to occur when the temperature is high.
After grain refinement, the forging temperature of liquid 6063 aluminum alloy can be appropriately increased, usually between 720-740℃, because:
(1) Liquid aluminum becomes sticky after grain refinement and simple solidification crystallization. (2) There is a liquid-solid two-phase too much zone in the crystallization front of the aluminum bar in forging. The higher forging temperature has a narrow too much zone, which is conducive to the escape of the gas excluded from the crystallization front. Of course, the temperature can not be too high, too high forging temperature will reduce the useful time of grain refiner and make the grain become relatively large.
2. When conditions are available, fully preheat, dry the casting system such as flow tank and shunt plate to prevent the reaction of water and liquid aluminum to form hydrogen absorption.
3. In aluminum bar forging, try to prevent the turbulence and rolling of liquid aluminum, do not simply use equipment to stir the liquid aluminum in the flow tank and the shunt plate, so that the liquid aluminum in the surface of the oxide film under the protection of the stable flow into the crystallizer crystallization.
This is because the equipment agitation liquid aluminum and liquid flow rolling will all make the surface of aluminum oxide film split, forming a new oxidation, at the same time, the oxide film involved in liquid aluminum.
The research shows that the oxide film has strong adsorption strength, it contains 2% water, when the oxide film involved in liquid aluminum, the water in the oxide film and liquid aluminum reaction, forming hydrogen absorption and slag.
4. The aluminum bar aluminum liquid filtration, filtration is a useful way to remove the nonmetal slag in the aluminum liquid, in the forging of 6063 aluminum alloy, usually with multi-layer glass fiber cloth filtration or ceramic filter plate filtration, no matter what kind of filtration method is used.
In order to ensure the normal filtration of liquid aluminum, liquid aluminum should be removed from the surface scum before filtration, because the surface scum is easy to jam the filter mesh of the raw material, so that the filtration can not be carried out normally, the simple way to remove the surface scum of liquid aluminum is to configure a slag plate in the flow tank, so that liquid aluminum is removed from the scum before filtration.


Post time: Jan-17-2022
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