First, the introduction of aluminum and aluminum rods
1, aluminum (Al) is a light metal, its compounds are widely distributed in nature, the crust of aluminum resources is about 400 to 50 billion tons, second only to oxygen and silicon, with third place. In the metal varieties, second only to iron and steel, metal for the second category. Aluminum has a special chemical and physical properties, not only light weight, texture, but also has good ductility, conductivity, thermal conductivity, heat resistance and resistance to nuclear radiation, is an important basis for the development of national economic raw materials.
Aluminum is extremely rich in metal content on Earth, its reserves in the metal in the first two. To the end of the 19th century, aluminum was able to emerge as a competitive metal in engineering applications, and popular. The development of the three important industries of aviation, construction and automobiles requires that the material properties possess the unique properties of aluminum and its alloys, which greatly contributes to the production and application of this new metal-aluminum.
2, aluminum rod is a kind of aluminum products, aluminum rod melting, including melting, purification, impurity removal, degassing, slag and casting process.
Second, the classification of aluminum rods
1, according to the different elements of aluminum alloy plate can be divided into: 1 × × × for the Department of pure aluminum (Al), 2 × × × for the aluminum-copper alloy aluminum (Al - Cu), 3 × × × for aluminum Aluminum alloy plate (Al - Mn), 4 × × × is Al - Si alloy aluminum plate (Al - Si), 5 × × × is Al - Mg alloy aluminum plate (Al - Mg), 6 ××× is Al - Mg - Cu, Al - Zn - Mg - Cu, Al - Mg - Si and Al - Mg - Si, respectively. . Generally each series has to be followed by three, each bit must have a number or letter, meaning: the second digit indicates the number of controlled impurities; third, four-digit aluminum aluminum percentage of the lowest decimal point content.
2, according to the shape can be divided into: round aluminum rods, aluminum rods, hexagonal aluminum rods and so on.
Third, the application of aluminum rods
Aircraft structure, rivets, missile components, truck wheels, propeller components and various other structural parts.
Fourth, the aluminum rod Details:
According to the aluminum bar contains different metal elements, aluminum rods can be divided into eight categories, which can be divided into nine series, the following step-by-step about:
A .1000 series of aluminum bars on behalf of 1050,1060, 1100 series. The 1000 series is among the largest in aluminum series in all series. Purity can reach more than 99.00%. Because it does not contain other technical elements, so the production process is relatively simple, the price is relatively cheap, is currently the most commonly used in a series of conventional industries. Most of the current market circulation of 1050 and 1060 series. 1000 series aluminum according to the last two Arabic numerals to determine the minimum aluminum content of this series, such as the 1050 series of the last two digits of 50, according to international brand naming principles, aluminum content must reach 99.5% above qualified products. China's aluminum alloy technical standards (gB / T3880-2006) also clearly provides 1050 aluminum content of 99.5%. The same reason 1060 series aluminum plate aluminum content must reach more than 99.6%.
II. 2000 series of aluminum bars on behalf of 2A16 (LY16), 2A02 (LY6). 2000 series of aluminum is characterized by high hardness, of which the original content of the highest copper, about 3-5%. 2000 series aluminum rods are aviation aluminum, is not often used in conventional industries.
2024 aluminum-copper-magnesium Department of the typical hard aluminum alloy, is a heat-treatable alloy, high strength, easy processing, easy turning, corrosion resistance in general.
(T3, T4, T351), the T3 state parameters are as follows: tensile strength 470MPa, 0.2% yield strength 325MPa, elongation: 10%, fatigue strength 105MPa, hardness 120HB.
2024 aluminum rod of the main purposes: aircraft structure, rivets, truck wheels, propeller components and various other structural parts
Three .3000 series of aluminum bars on behalf of 3003, 3A21 based. China 3000 series aluminum production process is more excellent. 3000 series aluminum rod is composed of manganese element as the main component. Content between 1.0-1.5, is a better anti-rust function of the series.
Four .4000 series of aluminum bars on behalf of the 4A01 4000 series of aluminum is a series of high silicon content. The silicon content is typically between 4.5 and 6.0%. Is a building materials, machinery parts, forging materials, welding materials; low melting point, good corrosion resistance, Product Description: With heat,
Five .5000 series of aluminum bars on behalf of 5052.5005.5083.5A05 series. 5000 series of aluminum rods are more commonly used series of aluminum alloy, the main element of magnesium, magnesium content between 3-5%. Also known as aluminum-magnesium alloy. The main features of low density, high tensile strength, high elongation. In the same area under the weight of aluminum-magnesium alloy other than the series in the conventional industry is also more widely used. In our country 5000 series aluminum plate is one of more mature aluminum plate series.
Six .6000 series aluminum bar on behalf of 6061 mainly contains magnesium and silicon two elements, so the concentration of the 4000 series and 5000 series of advantages 6061 is a cold-processed aluminum forging products, suitable for against corrosive, oxidative demanding applications. Can be used, easy to coating, good processing.
Seven .7000 series aluminum bar on behalf of 7075 mainly contains zinc. Also belongs to the aviation series, is the aluminum magnesium zinc copper alloy, is heat-treatable alloy, belongs to the super-hard aluminum alloy, has the good abrasion resistance.At present basically relies on the import, our country's production craft also to be improved.
VIII. 8000 series of aluminum rods are more commonly used for other 8011 series, the majority of applications for the aluminum foil, the production of aluminum bar is not commonly used.
Fifth, the aluminum rod casting process
Casting, including melting, purification, impurity removal, degassing, slag and casting process. The main process is:
(1) Ingredients: according to the needs of the production of specific alloy grades, calculate the amount of various alloying ingredients, a reasonable mix of raw materials.
(2) Melting: The raw materials will be equipped with a good melting process by adding melting furnace, and through the degassing, slag refining means to melt the debris, gas effectively removed.
(3) casting: molten aluminum in a certain casting process conditions, through the deep well casting system, cooling casting into a variety of round casting rods.