6-series aluminum alloy profile suitable for aluminum template and preparation method thereof

Abstract

The invention discloses a 6-series aluminum alloy profile suitable for an aluminum template and a preparation method thereof. By adjusting the alloy components of an aluminum alloy ingot and a heat treatment process, the average main cylinder pressure of the 6-series aluminum alloy profile suitable for the aluminum template in the extrusion process is effectively reduced, and the finally prepared aluminum template profile has more excellent tensile strength and yield strength. The adjusted alloy components are prepared from the following components in percentage by weight: 0.65-0.75% of Si, less than or equal to 0.25% of Fe, 0.05-0.10% of Cu, 0.05-0.10% of Mn, 0.55-0.65% of Mg, less than or equal to 0.10% of Cr, 0.20-0.30% of Zn, 0.05-0.10% of Sn, less than or equal to 0.05% of Ti, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of total impurities and the balance Al. The aluminum template profile is prepared by the steps of ingot casting, homogenization treatment, surface brush rod or peeling treatment, extrusion forming, quenching cooling and artificial aging of the prepared alloy components.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to a 6-series aluminum alloy profile suitable for aluminum formwork and a preparation method thereof. Background technique [0002] The use of foreign aluminum formwork has a history of more than 50 years, the technology is mature, and the field is very extensive. The aluminum formwork industry in my country has also started to develop rapidly in the past 10 years, and it has been widely used from design departments to construction units. Moreover, as a new type of building formwork, the development and application of aluminum formwork can not only promote the application of aluminum, but also have good economic benefits for the construction industry, especially for environmental protection and resource conservation. It can be seen that vigorously promoting "saving wood with aluminum" in the construction field is of great significance, and the market potential is ...

AI Technical Summary

Problems solved by technology

[0006] However, the mainstream aluminum formwork profiles currently on the market are all produced with 6061 alloy, but because of its high Mg content and certain Cu content, 6061 alloy has high resistance to extrusion deformation, and the efficiency of especially producing formwork profiles with reinforced hole shapes is low. At the same time, a higher extrusion temperature is required, which wastes gas and electric energy

Moreover, because of the high Mg content and the Cr element, the quenching sensitivity is high. Generally, a large amount of water spray or water penetration must be used to cool to ensure the performance. However, this process is easy to cause deformation of the material due to uneven cooling, thereby affecting the dimensional accuracy. Affect the verticality and flatness of the wall after pouring cement

Moreover, the corrosion resistance of 6061 material is average, and long-term contact with cement will lead to shortened service life. The Cr element contained in it is easy to form segregation in the casting process, which can easily lead to differences in recrystallization at different positions of the material, resulting in bad defects such as local grain deterioration, which affects product fatigue. Strength and other properties, there may be a risk of cracking after long-term use

Images