1. Introduction to the manufacturing method of an ultra-long corrosion-resistant aluminum alloy seamless tube: The formula of aluminum alloy is as follows: Si< 0.05%, Fe< 0.15%, Cu< 0.002%, Mn< 0.1%, Mg2.4-2.8%, Cr< 0.17%, Zn< 0.005%, Pb< 0.007%, other impurities single < 0.02%, total impurities < 0.10%, the margin is Al. Si, Cu, Zn, Pb and other harmful trace elements are strictly controlled to improve the corrosion resistance of the materials. The surface corrosion rate of the aluminum alloy tubes produced in seawater is less than 0.0052 mm/year.
2. This technology belongs to the field of aluminum alloy seamless tube extrusion, and relates to a semi-perforated extrusion method of aluminum alloy seamless tube, including the following steps: Ingredients, smelting, homogenization, adjusting the concentricity, extrusion, cutting and heat treatment, the extrusion process of perforation beard needle rod diameter 5 mm larger than aluminum alloy ingot casting diameter, solve the existing hollow ingot don’t punch squeeze extruded aluminium alloy seamless tube low yield and solid extrusion ingot perforation extrusion big accident prone to breakage problems.
3.This technology belongs to the field of aluminum alloy manufacturing technology, relates to a 7075 aluminum alloy seamless tube production process, aluminum alloy raw materials according to the weight percentage of the ingredients, namely: Si≤ 0.20%, Fe≤ 0.30%, Cu: 1.5 ~ 1.7%, Mn≤ 0.20%, Mg: 2.5-2.75%, Cr: 0.18-0.23%, Zn: 5.2 ~ 5.7%, Ti≤ 0.12%, Zr≤ 0.02%, single impurity ≤ 0.05%, total ≤ 0.15%, allowance for Al, aluminum alloy raw materials after casting, homogenization, concentricity adjustment, extrusion, sawing and heat treatment process with the formula, successfully extruded 7075 alloy seamless tube performance to meet the requirements.
4.This technology belongs to the field of aluminum alloy manufacturing technology, relates to a production process of 6063 aluminum alloy seamless tube, aluminum alloy raw material according to the weight percentage of the ingredients, namely: Si: 0.3 ~ 0.42%, Fe≤ 0.3%, Cu≤ 0.05%, Mn≤ 0.05%, Mg: 0.5 ~ 0.6%, Cr≤ 0.05%, Zn≤ 0.05%, Ti≤ 0.05%, Zr≤ 0.002%, single impurity ≤ 0.05%, total ≤ 0.15%, allowance for Al, aluminum alloy raw materials after casting, homogenization, concentricity adjustment, extrusion, sawing and heat treatment process with the formula. The 6063 alloy seamless tube with satisfactory performance was extruded successfully.
5.This technology belongs to the field of aluminum alloy manufacturing technology, relates to a 6082 aluminum alloy seamless tube production process, aluminum alloy raw material according to the weight percentage of the ingredients, namely: Si: 1.0 ~ 1.3%, Fe: 0.15 ~ 0.25%, Cu≤ 0.06%, Mn: 0.4-0.9%, Mg: 0.65-1.0%, Cr: 0.03-0.2%, Zn≤ 0.05%, Ti: 0.02 ~ 0.08%, single impurity ≤ 0.05%, total ≤ 0.15%, allowance for Al, aluminum alloy raw material after casting, homogenization, concentricity adjustment, extrusion, sawing and heat treatment process with the formula, successfully extruded performance to meet the requirements of 6082 alloy seamless tube.