Before we learned a lot about the relevant properties of aluminum coil aluminum plate, or some practical skills, what elements to share today will make the quality of aluminum coil aluminum plate problems or changes.
1. Alloy elements:
6063 alloy is an alloy prepared with aluminum magnesium silicon as the main element. Each element has a certain range of content, and the price of magnesium is high. In order to reduce costs, some manufacturers reduce the amount of magnesium to less than the allowable content value. Some even worse, the magnesium content is lower than the allowable less content value. 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 soft like noodles. This is one of the reasons why aluminum is cheaper by several thousand yuan.
2. Aluminum alloy melting furnace:
It is also important how the 6063 alloy is melted and what kind of furnace is used. Now the domestic furnaces are used in the 1940s and 90s. The smaller 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 tonnage of one ton, two tons, five tons, ten tons, twenty-five tons and fifty tons of molten aluminum-shaped furnace. More advanced, add a static furnace under the aluminum melting furnace. The 6063 alloy is important for the static furnace. It can be degassed and degassed in this furnace, set aside, and then cast aluminum rods, aluminum ceilings for extrusion use. The quality of the alloy prepared in the original coal-burning furnace and the modern round furnace must be different. In general furnaces, 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, there are serious slag inclusion bubbles in the aluminum rod for extrusion. This is one of the reasons for the poor quality of the aluminum material, and it is also one of the reasons for the cheap aluminum price.
3. Alloy casting:
The older casting equipment in China has iron mold casting in the 40s, and the advanced one is hydraulic semi-continuous casting. The iron casting mold has a poor crystalline structure, and there are a lot of slag and bubbles in the casting bar, and the quality of the casting bar is poor. Nowadays, the general factories commonly use horizontal casting (also known as continuous casting) and semi-continuous casting. , Semi-continuous casting most wire rope transmission, better hydraulic transmission. The length of semi-continuous casting rods varies from 3 meters, 4 meters to 8 meters. The semi-continuous casting is a pit type. It is dropped while casting, and it is cooled with cold water on all sides. Because the water cooling is even around, the crystal structure of the cast rod is even and fine. However, the downward transmission of the steel wire rope is not as stable as the hydraulic transmission, and the surface of the hydraulically cast casting rod is smoother than that of other casting rods. The smooth surface of the cast rod is one of the prerequisites for extruding the profile. The surface of the cast rods cast by other methods is relatively rough. In order to ensure the quality of the profile, sometimes the cast rods are first cut, and the cast rods are roughened. The currently used semi-continuous casting molds are advanced, hot-top leveling casting molds. The characteristics of this casting mold can be cast from several to dozens at a time. At the same time, the casting quality is good. In order to be able to produce good aluminum profiles, if the quality of the cast rods cast by the original and old casting equipment is worrying, it may not be possible to produce good aluminum profiles. There are many aluminum material factories in China that do not have the equipment to produce aluminum rods, but purchase 6063 alloy rods from electric aluminum factories or other factories. In such an aluminum material factory, the quality of the aluminum material is in the hands of the casting rod factory. It is difficult to achieve stable quality. The use of backward equipment is more important than the use of advanced casting equipment. First, the investment is small and the production cost is low, which is also one of the reasons why the price difference of aluminum materials is large.
4. Profile extrusion:
There are many types of profile extruders in China, and the difference in grade is large. Some factories have their own simple extruders, some have been transformed with plastic extrusion machines, and a few are made in China. There are water pressure and oil pressure. The better and worse extruders, the same cast bars, the quality of the extruded profiles will never be the same. We often see that 6063T5 is used for aluminum doors and windows in buildings, which is an international brand of the United States.
I believe that everyone will have a certain understanding of the major factors affecting aluminum coils and aluminum materials after reading the above explanations. I hope you will take these factors into consideration when you choose aluminum coils in the future.
