Architectural aluminum profiles,It must have certain mechanical properties. When other conditions are the same, the tensile strength and yield strength increase with the increase of content. The strengthening phase of 6063 gold is mainly Mg2Si phase. What is the best dosage of magnesium, silicon and magnesium? The Mg2Si phase consists of two magnesium atoms and one silicon atom. The relative atomic mass of magnesium and silicon is 24.3l and 28.09 respectively. Therefore, the mass ratio of Mg to Si in Mg2Si compound is 1.73:1.
Compared with the ingot without homogenization, the extrusion pressure can be reduced by 6% - 10%. The cooling rate after homogenization has an important influence on the precipitation behavior of the microstructure. Almost all Mg2Si can be dissolved in the matrix, and the excess Si can also exist as solid solution or dispersed fine particles. This kind of ingot can be rapidly extruded at low temperature, and excellent mechanical properties and surface finish can be obtained. In the extrusion production of aluminum profiles, the oil gas heating furnace can replace the resistance heating furnace, and the energy saving effect is obvious. Reasonable selection of furnace type, burner and air circulation mode can make the furnace obtain uniform and stable heating performance, stabilize the process and improve the product quality.
For extrusion production, extrusion temperature is the most basic and key process factor. Extrusion temperature has great influence on product quality, production efficiency, die life and energy consumption. The most important problem in extrusion process is the control of metal temperature. From ingot heating to extrusion quenching, it is necessary to ensure that the soluble phase structure will not precipitate from the solid solution or show the dispersion of fine particles. The heating temperature of 6063 alloy ingot is generally set in the temperature range of Mg2Si precipitation, and the heating time has an important influence on the precipitation of Mg2Si. The possible precipitation time can be greatly shortened by using rapid heating. Generally speaking, the heating temperature of 6063 alloy ingot can be set as follows: 460-520 ℃ for non-uniform ingot and 430-480 ℃ for uniform ingot.
After the profile is out of the die hole, it is generally towed by a tractor. When the tractor works, it will give the extrusion product a certain traction tension and move synchronously with the outflow speed of the product. The purpose of using the tractor is to reduce the uneven length and scratch during multi line extrusion, prevent the profile from twisting and bending after leaving the die hole, which will bring trouble to tension straightening. Tensile straightening can not only eliminate the longitudinal shape of the product, but also reduce the residual stress, improve the strength characteristics and maintain its good surface state.
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