A kind of processing method of 6000 series aluminum alloy

A treatment method and aluminum alloy technology, which is applied in the field of intensive cold deformation multi-stage short-time solution treatment to refine the grains of 6000 series aluminum alloys, and can solve the problems of easy oxidation of the surface, performance degradation, and coarsening of the second phase. , to achieve the effects of hindering grain growth, inhibiting grain boundary expansion, and promoting recrystallization

Inactive Publication Date: 2018-09-18
YANTAI NANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of recrystallization and grain refinement widely used at home and abroad has defects such as too long recrystallization holding time, easy oxidation of the surface, and performance degradation caused by the coarsening of the second phase.

Method used

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  • A kind of processing method of 6000 series aluminum alloy
  • A kind of processing method of 6000 series aluminum alloy
  • A kind of processing method of 6000 series aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] according to figure 1 The grain refinement process shown uses Al-Mg-Si alloy as the rolling material. There are a large number of evenly distributed disperse phases in the sample structure homogenized at 570℃ for 7h, and the rolling deformation is realized by two-roll rolling. The billet is subjected to rapid multi-pass rolling to achieve a deformation of 90%, and then a solid solution recrystallization treatment (three-stage treatment) is carried out at 560 ° C for 10 minutes. °C / s, Image 6 Its metallographic structure, the average grain size of the alloy at this time is 10.2 μm. In order to verify the material properties after the refining process, the plate was finally subjected to 540 ℃ × 5min solution and T4p aging treatment, and the mechanical properties of the aging plate were tested, as shown in Table 1. It can be seen from the above that, compared with the traditional hot rolling process, the process of the present invention can obtain higher strength, and ...

Embodiment 2

[0034] according to figure 1 In the shown grain refining process, Al-Mg-Si alloy is used as the experimental material, wherein the homogenization and compression treatment processes are the same as those in Example 1. The difference is that the rolled samples are respectively subjected to solid solution recrystallization treatment (secondary treatment) at 560 °C for 10 minutes. Figure 7 Its metallographic structure, the average grain size of the alloy at this time is 14.2 μm. In order to verify the material properties after the refining process, the plate was finally subjected to 540 ℃ × 5min solution and T4p aging treatment, and the mechanical properties of the aging plate were tested. At this time, the tensile strength and yield strength of the plate were 227MPa and 109MPa, respectively. , which is lower than that in Example 1. It can be seen that the secondary solid solution recrystallization treatment fails to completely refine the grain structure, and there is still a p...

Embodiment 3

[0036] according to figure 1 In the shown grain refining process, Al-Mg-Si alloy is used as the experimental material, wherein the homogenization and rolling treatment processes are the same as those in Example 1. The difference is that the rolled samples are respectively subjected to solid solution recrystallization treatment (three-stage treatment) for 15 minutes at 560 °C. Figure 8 Its metallographic structure, the average grain size of the alloy at this time is 11.6 μm. In order to verify the material properties after the refining process, the plate was finally subjected to 540 ℃ × 5min solution and T4p aging treatment, and the mechanical properties of the aging plate were tested. At this time, the tensile strength and yield strength of the plate were 214MPa and 107MPa, respectively. . Under this treatment process condition, the grain size is comparable to that of Example 1, indicating that the Al-Mg-Si alloy is not easy to be recrystallized and coarsened, but the mecha...

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Abstract

The invention relates to a treatment method of a 6000 system aluminum alloy. The treatment method comprises four steps of performing homogenizing annealing, performing rolling deformation, performing recrystallizing on solid solutions and performing ageing treatment. According to the treatment method disclosed by the invention, the optimal designs of deformation and recrystallization treatment are adopted, so that the mechanical properties of the 6000 system (Al-Mg-Si) aluminum alloy are obviously improved; through the adoption of the treatment method disclosed by the invention, the grain size of the aluminum alloy can be refined from 160 [mu]m or above to 25 [mu]m or below. The grain refining treatment method disclosed by the invention is short in production cycle, low in energy consumption, and simple in process; after the appropriate ageing treatment is performed, a grain-refining tissue can achieve an industrial application level; the processing method has important significance in material special machining and material science, and has great application potential and value in industrial production.

Description

technical field [0001] The invention relates to a material processing method, in particular to a processing method for refining 6000 series aluminum alloy crystal grains by strong cold deformation multistage short-time solid solution treatment. Background technique [0002] 6000 series aluminum alloys are dominated by magnesium and silicon. Mg 2 Si is the main strengthening phase and is the most widely used alloy at present. It has the advantages of low density, high specific strength and specific stiffness, good impact resistance, high corrosion resistance and good heat dissipation. Compared with titanium, magnesium and other light alloys With low price, it has become one of the most concerned lightweight materials in the world, with great development potential. Therefore, it has become an urgent problem to actively seek an economical and effective method to improve the comprehensive properties of 6000 series aluminum alloys. Among them, grain refinement is beneficial to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/05
CPCC22F1/05
Inventor 张涛李辉史春丽吕正风祝贞凤房洪杰江海涛
Owner YANTAI NANSHAN UNIV
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