Aluminum alloy ingot supplier introduces you: the main chemical factors affecting performance, strengthening phase Mg2S
The role and influence of Mg Mg and Si constitute the strengthening phase Mg2Si. The higher the content of Mg, the more the amount of Mg2Si, the greater the heat treatment strengthening effect, the higher the tensile strength of the profile, but the deformation resistance will increase , The plasticity of the alloy decreases, the workability deteriorates, and the corrosion resistance deteriorates.
The role and influence of Si The amount of Si should be such that all Mg in the alloy can exist in the form of Mg2Si phase to ensure that the role of Mg is fully exerted. As the Si content increases, the alloy grains become finer, the metal fluidity increases, the casting properties become better, the heat treatment strengthening effect increases, the tensile strength of the profile increases, the plasticity decreases, and the corrosion resistance deteriorates.
Chemical process in the production of 6063-T5 aluminum raw materials
Controlling range of Mg Mg is a flammable metal and will be burnt during smelting operation. When determining the control range of Mg, the error caused by burning should be considered, but it should not be too wide to avoid out of control of the alloy performance. We control the fluctuation range of Mg within 0.04% based on our experience and our factory's batching, smelting and testing levels. T5 profiles are from 0.47% to 0.50% and T6 profiles are from 0.57% to 0.5%. 60%.
Control range of Si When the range of Mg is determined, the control range of Si can be determined by the Mg / Si ratio. Because the plant controls Si to 0.09% to 0.13%, Mg / Si should be controlled between 1.18 to 1.32.
Selection range of chemical composition of 6063 aluminum alloy T5 and T6 state profiles. If you want to change the alloy composition, for example, you want to increase the amount of Mg2Si to 0.95%, in order to facilitate the production of T6 profiles, you can move Mg up to about 0.6% along the upper and lower limits of Si. At this time, Si was about 0.46%, Si was 0.11%, and Mg / Si was 1.
The amount of Mg2Si in the 6063 aluminum alloy profile is controlled in the range of 0.75% to 0.8%, which can fully meet the requirements of mechanical properties. In the case of a normal extrusion coefficient (greater than or equal to 30), the tensile strength of the profile is in the range of 200 to 240 MPa. And controlling the alloy in this way not only has good plasticity, easy extrusion, high corrosion resistance and good surface treatment performance, but also saves alloy elements. However, special attention should be paid to strict control of the impurity Fe. If the content of Fe is too high, the extrusion force will increase, the quality of the surface of the extruded material will deteriorate, the anodic oxidation color difference will increase, the color will be dull and dull, and Fe will also reduce the plasticity and corrosion resistance of the alloy. Practice has proved that it is ideal to control the Fe content in the range of 0.15% to 0.25%.
T5— artificial aging after cooling from molding temperature.
T5 is a heat treatment process. Through this process, the various chemical elements in the aluminum alloy are arranged in order, and after cooling down, the desired physical properties and chemical work properties are achieved.
Silicon Si: 0.20-0.6
Iron Fe: 0.35
Copper Cu: 0.10
Manganese Mn: 0.10
Magnesium Mg: 0.45-0.9
Titanium Ti: 0.10
Single: 0.05 Total: 0.15
6063 aluminum plate
Tensile strength σb (MPa): ≥205
Elongation stress σp0.2 (MPa): ≥170
Elongation δ5 (%): ≥7
Note: longitudinal mechanical properties of bar at room temperature
Sample size: diameter ≤12.5
6063 sheet spot specifications: 0.3mm-350mm (thickness)
6063 bar stock spot specifications: 3.0mm-500mm (diameter)
6063 wire spot specifications: 0.1mm-20mm (wire diameter)