6030 aluminum alloy production

In aluminum alloy smelting and smelting production, not only should each element be controlled not to exceed the standard, but also the total amount of impurity elements should not exceed the standard. When the content of a single element does not exceed the standard, but the total amount exceeds the standard, these impurity elements also have a great impact on the quality of the profile. In particular, it should be emphasized that practice has proved that when the zinc content reaches 0.05 (not more than 0.1 in the national standard), white spots appear on the surface of the profile after oxidation, so the zinc content should be controlled below 0.05.

Basic characteristics of Al-Mg-Si series aluminum alloys：

The chemical composition of 6063 aluminum alloy in GB/T5237-93 standard is 0.2-0.6% silicon, 0.45-0.9% magnesium, the maximum limit of iron is 0.35%, and the remaining impurity elements (Cu, Mn, Zr, Cr, etc.) are less than 0.1%.

Melting of 6063 aluminum alloy:

1.Control the melting temperature: The smelting temperature of 6063 aluminum alloy is preferably controlled between 750-760 ℃. If it is too low, it will increase the generation of slag inclusions. If it is too high, it will increase the burning loss of hydrogen absorption, oxidation and nitridation. Studies have shown that the solubility of hydrogen in molten aluminum rises sharply above 760 ℃, and there are many ways to reduce hydrogen absorption when heat is reduced, such as drying melting furnaces and smelting tools, preventing the use of fluxes from moisture and deterioration.

2.Select excellent flux and appropriate refining process:

Flux is an important auxiliary material used in aluminum alloy smelting. At present, the main components in the fluxes sold on the market are chlorides and fluorides. Among them, chlorides have strong water absorption and are easily damped. Therefore, the raw materials used must be dried in the production of the flux. Completely remove moisture, seal the packaging, prevent damage during transportation and storage, and pay attention to the production date. If the storage date is too long, moisture absorption will also occur. In the smelting of 6063 aluminum alloy, the slag remover, If fluxes such as refining agents and covering agents absorb moisture, the molten aluminum will absorb hydrogen to varying degrees.

It is also very important to choose a good refining agent and a suitable refining process. At present, most of the refining of 6063 aluminum alloy adopts powder spraying refining. This refining method can make the refining agent fully contact with the aluminum liquid, and can maximize the refining agent. efficacy. Although this feature is obvious, the refining process must also be paid attention to, otherwise the desired effect will not be obtained. The nitrogen pressure used in the powder refining is preferably small, and it is better to be able to blow out the powder. If the nitrogen used in the refining is not high purity Chlorine (99.99% N2), the more nitrogen gas is blown into the aluminum liquid, the more water in the fluorine gas will cause the aluminum liquid to oxidize and absorb more hydrogen.

3.Grain Refinement: Grain refinement is one of the most important processes in aluminum alloy melting and casting, and it is also one of the most effective measures to solve casting defects such as pores, coarse grains, bright crystals, feather crystals, and cracks. In aluminum alloy casting, it is non-equilibrium crystallization. Most of all impurity elements (including aluminum alloy elements) are concentrated in the grain boundaries. The smaller the grain size, the larger the grain boundary area. The impurity elements (or aluminum alloy elements) elements), the higher the uniformity. For impurity elements, the uniformity is high, which can reduce its harmful effects, and even turn the harmful effects of a small amount of impurity elements into benefits; for aluminum alloy elements, the uniformity is high, which can give full play to the greater aluminum alloying of aluminum alloy elements. ship energy to achieve the purpose of making full use of resources.

In order to product qualified aluminum alloy, the aluminum alloy additive elements also important, Anyang Huatuo Metallurgy own rich experience in the silicon and magnesium metal for aluminum alloy production, welcome for consult.