Heat treatment method particularly applicable to spinning plastic forming of aluminum alloy extruded tube
A process method, aluminum alloy technology, applied in the field of heat treatment process, can solve the problems of lower production efficiency, limited laboratory application results, unfavorable industrial application, etc., and achieve the effect of improving mechanical properties
Active Publication Date: 2012-07-11
天津锐新昌科技股份有限公司
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Problems solved by technology
The deformation heat treatment technology used in the spinning process of aluminum alloy hot extrusion pipes developed in recent years, which combines the deformation strengthening of plastic deformation and the phase transformation strengthening during heat treatment, can improve the comprehensive performance of spinning materials, but this process is mostly limited to Laboratory application results, and due to the solution / quenching process of the workpiece required in the deformation heat treatment technology, it needs to be carried out in the spinning forming process, especially before the last spinning pass, the off-line solution heating is carried out , heat preservation and water quenching heat treatment, which reduces production efficiency, especially not conducive to industrial applications
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Embodiment 1
[0018] Taking the 6063 type aluminum alloy extruded pipe as an example, the chemical composition is Al-0.54 Mg-0.43 Si-0.15 Fe-0.10 Ti (mass percentage).
[0019] (1) The aluminum alloy extruded round ingot is heated and then extruded, and is simultaneously subjected to online air cooling and quenching. After high-temperature forming and cooling, the extruded pipe is obtained from natural aging to a steady state. Its typical mechanical properties are shown in Table 1.
[0020] Table 1
[0021]
[0022] (2) Put the extruded pipe in this state into an annealing furnace for annealing treatment: heating temperature 410°C, heating time 2.5 hours, and air cooling when out of the furnace; the material can obtain a fine-grained structure with an average grain size of 110 μm and complete recrystallization, and its typical mechanical properties As shown in Table 2.
[0023] Table 2
[0024]
[0025] (3) After annealing, the extruded pipe enters the spinning forming operation. Th...
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The invention discloses a heat treatment method particularly applicable to spinning plastic forming of an aluminum alloy extruded tube, aiming to provide a method by which industrial application can be economically and effectively, and the toughness level of an alloy material can be improved on the basis of keeping the spinning plastic forming capability of the aluminum alloy extruded tube. The key point of the technical scheme is that the heat treatment method comprises the following steps: firstly, proceeding from control of the metallurgical quality of the aluminum alloy to reduce the Fe impurity content and alloying of a trace element, cooling the extruded tube in a high temperature forming process; secondly, naturally aging the extruded tube to a stable state, annealing the extruded tube, and performing spinning plastic forming on an annealed 6063 alloy extruded tube; and finally, aging the extruded tube artificially. The heat treatment method is characterized in that through microalloying and annealing treatment, the material can obtain plasticity which is necessary to spinning forming; a fine grain strain hardening mechanism as well as a pre-aging mechanism in the spinning plastic forming process accumulate energy for desolventizing precipitation process in the later artificial aging treatment; and the mechanical properties of a spinning workpiece material can reach standard stated values in a T5 state.
Description
technical field [0001] The invention relates to a heat treatment process, in particular to a heat treatment process for an aluminum alloy extruded pipe used for spinning plastic forming. Background technique [0002] Spinning technology is a local continuous plastic forming process. With the help of rotating wheels, mandrels and other tools, the aluminum alloy material can be locally deformed continuously to obtain aluminum alloy components with a rotating surface. For example, aluminum alloy is used to extrude the tube billet, and an aluminum alloy tube with spiral fins on the surface and heat dissipation function is obtained through spinning plastic forming. [0003] The workpiece is manufactured by the spinning forming process, and its high strength, relatively accurate forming size and good surface finish are its comprehensive performance goals. The deformation heat treatment technology used in the spinning process of aluminum alloy hot extrusion pipes developed in rece...
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IPC IPC(8): C22F1/04C21D8/10
Inventor 刘惠群
Owner 天津锐新昌科技股份有限公司