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Aluminum profiles are good and bad, and the quantity of aluminum profiles purchased is huge, it is impossible to check them one by one. In order to reduce unnecessary troubles, it is very important to choose a good manufacturer. You can buy assured materials.
alloy element
6063 alloy is an alloy prepared with aluminum, magnesium and silicon as the main elements. Each element has a certain range of content and the price of magnesium is high. Some manufacturers reduce the amount of magnesium to the minimum allowable content in order to reduce costs. Some even worse, the magnesium content is lower than the minimum allowable content.
There are factories that add waste wires and waste pots and aluminum pots to alloys, and basically can't talk about 6063 alloy. As a result, the mechanical strength of aluminum profiles is very low, which can be so low that it is easy to bend with two hands and one bend, commonly known as "noodles" as soft. This is one of the reasons why aluminum profiles can be several thousand yuan cheaper.
The regular aluminum profile manufacturers have internal standards when formulating alloy components, that is, within the range of various element content, each factory has its own smaller variation range, and the ratio between aluminum, magnesium and silicon is very strict. Each factory has its own data and keeps each other confidential.
Only alloys made with qualified formulas can guarantee the quality, otherwise the quality will not be improved in future processing.
Aluminum alloy melting furnace
It is also important how the 6063 alloy is melted and what kind of furnace is used. The furnaces used in China are now in the 1940s and 90s. The worst manufacturers use the original crucible boilers. There are coal-fired, oil-fired, gas-fired and electrically heated smelting furnaces.
Some stoves have chimneys, and others have no chimneys. The most commonly used are square furnaces (rectangular furnaces), the advanced ones are round furnaces, and some round furnaces can tilt aluminum water. On the one-ton, two-ton, five-ton, ten-ton, twenty-five-ton and fifty-ton tonnage melting furnaces. A bit more advanced, add a static furnace under the aluminum melting furnace. The 6063 alloy is important for the static furnace. It can be slag and degassed in this furnace, let it stand, and then cast aluminum rods for extrusion.
The quality of the alloy prepared in the original coal-burning furnace and the modern round furnace is not the same.
In general, no matter what kind of fuel is burned, there should be a chimney, and most of the waste gas slag generated by the fuel during the combustion process can be discharged from the chimney.
If the waste slag of the smokeless tube is completely melted in aluminum water, the aluminum rod for extrusion is cast, and there are serious slag inclusion bubbles inside. This is one of the reasons for the poor quality of the aluminum profile, and it is also one of the reasons for the cheap aluminum price.