The English name of Primary aluminum is primary aluminum, and it can also be called primary aluminum, which is defined as liquid aluminum siphoned from the aluminum electrolyzer to the ladle (ladle). Then it is repoured into the mixing furnace by weighing, purified and cast into small ingot, the mass of this small ingot is usually 20kg±2kg or 15kg±2kg or large T-bar (T-bar), and it can also be smelted into alloy for pressure processing in the mixing furnace. The ingot cast with purified primary aluminum is called remelting aluminum ingot, according to GB/T1196-2008, there are 8 kinds of remelting aluminum ingot. Each package of primary aluminum must be weighed and filled with production cards, either automatically or manually. Therefore, the primary aluminum production should be accurate, unless deliberately falsified, modify the data, in addition, you can also calculate the output according to the theoretical formula, the calculated output should be very close to the actual output.

In the factory, primary aluminum is often called aluminum water or aluminum melt, which is inappropriate, because aluminum water and aluminum melt are a broad term that generally refers to various liquid aluminum, and primary aluminum is a specific term, of course, primary aluminum is also a kind of aluminum water.

Aluminum with aluminum metal or metal aluminum

There are two forms of aluminium in English: aluminium and aluminum, the former being British and the latter American. The United States, Canada, Mexico, Japan use the American style, while other countries and regions use the British style, and China should use the British style. When we speak and write articles, do not say metal aluminum, metal magnesium, let alone written as metal aluminum, metal magnesium, this is a foreigner's statement, because it is impossible to see whether it is metal or non-metal, nor can it see its form at room temperature, whether it is solid, liquid or gaseous. So write aluminium metal, and the Chinese character is really great, a look at the name of the element, you know its properties and form, for example, when we say aluminum, we know it is a metal, solid at room temperature, do not need to say metal aluminum or aluminum metal, in the written material should pay attention to this point.

Rolling and calendering

At present, there are still a small number of people in China's aluminum processing industry, individual factories, and even individual authoritative institutions will be rolling (rolling or milling) said to be calendering, aluminum industry has a large aluminum processing plant built in the 1970s and 1980s to its plate and strip workshop called calendering workshop after calendering plant, but in the standard, textbooks and dictionaries are not called calendering. The iron and steel industry is called rolling, there is no calendering. The word "rolling" is not found in the Xinhua Dictionary, but rolling is defined as "the process of using pressure between two counter-rotating rolls to change the shape and properties of metal materials." The term "calendering" is also explained in GB/T8005.1-2008 (Aluminium and aluminium alloys terminology Part I: Products and processing processes), but the term "milling" is defined as "the process in which metal is rolled between the upper and lower rolls of the mill to produce a veneer or strip sheet." Therefore, do not use the term rolling, but use the term rolling, which is the case in the iron and steel industry.

Thick plate, thin plate and medium plate

Before 2002, China's aluminum processing industry did not say thick plate, is a year China has a state-owned comprehensive large-scale aluminum processing enterprises to build a modern thick plate production line project, in the relevant state departments to hit the project report put forward the application for the construction of thick plate project, since then "thick plate" this technical term is widely circulated in China's aluminum industry, so far. In fact, whether in the world aluminum industry or in China's aluminum processing industry there is no "medium and thick plate" this term, in GB/T8005.1-2008 (aluminum and aluminum alloy terminology Part 1: products and processing processes) only listed sheet and plate (plate) note. Sheet definition: sheet with thickness greater than 0.20mm and greater than 6mm; Thick plate definition: a plate with a thickness greater than 6mm. In addition to North America, other countries and regions are defined in this way, North America defines thick plate as: thickness greater than 0.25 inches (6.35mm) sheet. However, in the steel industry there is really a "plate" the term, their definition: thickness ≤3.0mm for the plate, thickness >3.0mm~≤20.0mm plate for the plate, thickness >20.0mm~≤40.0mm plate for the thick plate, thickness greater than 40.0mm plate for the extra thick plate.

It is recommended to cancel the term "thick plate" in order to be in line with international practice, not to add confusion to the formulation of standards, we do not use this term, if it is necessary to add this term, it should be given a clear explanation and definition in the standard.

Wheels and hubs

Before about 2010, China called the automobile aluminum wheel hub (hub), it is right, from 2010 to change the wheel (wheel), it is also right, the international are so called, the wheel hub is changed to the wheel is in line with international standards, more convenient for international exchanges and international trade. China is the world's largest automobile aluminum wheels and motorcycle aluminum wheels production and export power, in 2014, China's automobile aluminum wheels production capacity of more than 200 million/year, output of about 160 million pieces, exports accounted for about 51.5%, the production of so many wheels about 1600kt aluminum alloy consumption, export manufacturers about 1300. China should export more aluminum wheels and aim for exports to account for about 80 percent of production. According to the China Association of Automobile Manufacturers, in 2014, China's aluminum motorcycle wheel production capacity of about 100 million pieces /a, the output of about 68000k pieces, exports accounted for about 55%.

Friction Stir welding and Friction Stir Welding (FSW)

Friction stir welding (FSW,Frickionstir welding) was invented by the British Welding Institute (TWI) in the early 1990s, and was commercialized for the first time by Norwegian Sapa Aluminum Company in 1999. Now this method has become the most advanced welding process for aluminum and aluminum alloys. China has fully mastered this technology and its equipment manufacturing technology. At present, there are two translations of FSW in China, one is friction stir welding, the other is friction stir welding, the former is right, the latter is wrong, no matter from the English grammar and habits or the working principle of this method is wrong, in any occasion to apply friction stir welding, hope to be corrected, official publications do not use the term "friction stir welding".

Compared with other welding processes of aluminum alloy at present, the main advantages of friction stir welding are: the welding temperature does not reach the melting point of aluminum and aluminum alloy, usually not higher than 510 ° C, will not melt, but greatly softened, so that with the pointer "flow", the weld has a more refined recrallization organization than the base material, the weld is almost on the same plane with the base material, and their mechanical properties are almost equal; The weld can be linear or other shapes, and no special measures can be taken for crack sensitive alloys. No need to fill metal and protective gas, the cost is lower than the traditional process; No need for opening and pre-welding treatment; The welding speed is higher than that of MIG; The welding deformation is small, only one twelfth of the MIG method; Can weld all deformation aluminum alloy and cast aluminum alloy, can weld dissimilar such as copper and aluminum; The heat-affected performance is higher than that of fusion welding. Compared with the traditional fusion welding method, this method has the advantages of low welding temperature, small deformation and no solidification crack. It is the best modern process for welding aluminum alloy, which can be welded smoothly and easily crack superhardness aluminum alloy and aluminum-lithium alloy. It can weld the workpiece with thickness of up to 75mm on one side and 150mm on both sides. It is an environmentally friendly welding process with no dry gas, no arc and no gas emission. No correction is required after welding; Low inspection cost; High degree of automation; Repeatable production; Almost no pre-welding is required. China should promote the application of friction stir welding to the extent possible.

Extruded round ingot and billet

Aluminum tube Aluminum square tube aluminum industry technical terms analysis

billet should be translated as round ingot, extruded round ingot, can be referred to as round ingot, but can not be translated as round rod or cast rod, because the English name of rod is bar or rod. The bar is a semi-finished product, and the ingot is the original blank of the processing bar. Extruded ingot said as a rod or written rod, easy to make people mistake is a rod, is a kind of semi-finished products, in the early years, there is a company in China will only easily processed round ingot written as a rod, the bar exported to the international market when the remelted ingot, defrauding export tax rebates, causing adverse effects in the international market.

Whatever is called "bar" aluminum products regardless of appearance, its processing deformation rate must be ≥70%, otherwise it can not eliminate the casting structure, can not be considered as a "bar", even if the deformation rate reaches 50% should still be regarded as ingot, not bar. In China, casting ingots as rods originated in the construction and production of construction aluminum profiles in Guangdong Province in the middle of the last century in the 1980s, and later swept the whole industry. It is now difficult to avoid the use of the term "cast rod" in publications.

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