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Friction stir processing method for improving performance of 6063 aluminum alloy by adding Al-Er intermediate alloy

An intermediate alloy and friction stir technology, which is applied in metal processing equipment, manufacturing tools, non-electric welding equipment, etc., can solve the problems of high cost of Sc element and increase production cost, etc., and achieve the effect of enhancing alloy strength and excellent comprehensive performance

Inactive Publication Date: 2019-12-20
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of Sc elements is relatively expensive, which greatly increases the production cost

Method used

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  • Friction stir processing method for improving performance of 6063 aluminum alloy by adding Al-Er intermediate alloy
  • Friction stir processing method for improving performance of 6063 aluminum alloy by adding Al-Er intermediate alloy
  • Friction stir processing method for improving performance of 6063 aluminum alloy by adding Al-Er intermediate alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Using the traditional ingot metallurgy method, industrial pure Al, Al-10wt.% Er master alloy is smelted in the smelting furnace, and the cast Al-2wt.% Er master alloy is prepared by cooling with a metal abrasive tool, and its size is: long ×width×thickness=180mm×50mm×33mm. DK7740E electric discharge numerical control wire cutting machine is used to process the above-mentioned master alloy, and the core part is taken out and processed into a strip shape, and the size is: length×width×thickness=180mm×3mm×(1.5-2)mm.

[0031] Clean the surface of the 6063 aluminum alloy extruded plate and fix it on the clamping device. The size is: length×width×thickness=180mm×90mm×9mm. Use the model SXT-10 gantry mobile friction stir welding machine to assemble the milling cutter, and make a groove on the extruded plate. The size of the groove mark: length×width×depth=180mm×(1.5-2)mm×3mm, after the groove is completed The grooves are filled with long strips of as-cast master alloy and com...

Embodiment 2

[0034] Using the traditional ingot metallurgy method, industrial pure Al, Al-10wt.% Er master alloy is smelted in the smelting furnace, and the cast Al-2wt.% Er master alloy is prepared by cooling with a metal abrasive tool, and its size is: long ×width×thickness=180mm×50mm×33mm. DK7740E electric discharge numerical control wire cutting machine is used to process the above-mentioned master alloy, and the core part is taken out and processed into a strip shape, and the size is: length×width×thickness=180mm×3mm×(1.5-2)mm.

[0035] Clean the surface of the 6063 aluminum alloy extruded plate and fix it on the clamping device. The size is: length×width×thickness=180mm×90mm×9mm. Use the model SXT-10 gantry mobile friction stir welding machine to assemble the milling cutter, and make a groove on the extruded plate. The size of the groove mark: length×width×depth=180mm×(1.5-2)mm×3mm, after the groove is completed The grooves are filled with long strips of as-cast master alloy and com...

Embodiment 3

[0038] Using the traditional ingot metallurgy method, industrial pure Al, Al-10wt.% Er master alloy is smelted in the smelting furnace, and the cast Al-2wt.% Er master alloy is prepared by cooling with a metal abrasive tool, and its size is: long ×width×thickness=180mm×50mm×33mm. DK7740E electric discharge numerical control wire cutting machine is used to process the above-mentioned master alloy, and the core part is taken out and processed into a strip shape, and the size is: length×width×thickness=180mm×3mm×(1.5-2)mm.

[0039]Clean the surface of the 6063 aluminum alloy extruded plate and fix it on the clamping device. The size is: length×width×thickness=180mm×90mm×9mm. Use the model SXT-10 gantry mobile friction stir welding machine to assemble the milling cutter, and make a groove on the extruded plate. The size of the groove mark: length×width×depth=180mm×(1.5-2)mm×3mm, after the groove is completed The grooves are filled with long strips of as-cast master alloy and comp...

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Abstract

The invention relates to a friction stir processing method for improving performance of a 6063 aluminum alloy by adding an Al-Er intermediate alloy. The method comprises the following specific steps that a long strip-shaped cast Al-Er intermediate alloy is pre-processed, grooving is conducted on a 6063 aluminum alloy extrusion plate to be filled with the cast Al-Er intermediate alloy, friction stir processing treatment is conducted, and artificial aging treatment is conducted. The friction stir processing technology is adopted, uniform and fine equiaxed grains are generated in a stirring zone,compared with an unprocessed alloy, the grains are obviously refined, the tissue is more uniform, and the plasticity of the alloy is improved. Due to the high-temperature influence exists in the friction stir processing process, a strengthening phase Mg2Si phase of the aluminum alloy is subjected to solution, after subsequent artificial aging is conducted, the Mg2Si strengthening phase is re-precipitated in the stirring zone, meanwhile, due to the addition of the cast Al-Er intermediate alloy, a nano-scale Al3Er strengthening phase is precipitated in the artificial aging process as well, theMg2Si strengthening phase and the Al3Er strengthening phase cooperatively act to pin the grain boundary to hinder dislocation motion, so that the comprehensive performance of the alloy is improved.

Description

technical field [0001] The invention relates to a friction stir processing method for improving the properties of 6063 aluminum alloy by adding an Al-Er intermediate alloy, and belongs to the technical field of large plastic deformation and heat treatment. Background technique [0002] In recent years, under the environment of vigorously advocating energy saving and emission reduction, various new high-performance aluminum alloys have begun to emerge. How to simultaneously improve the strength and plasticity of aluminum alloys has become the key to whether they can be widely used. Friction Stir Processing (FSP) is a new material modification and preparation technology. This technology was first proposed in 1999 by R S MISHIRA of the University of Missouri in the United States when friction stir welding was applied to the research of 7075 aluminum alloy. Therefore, friction stir processing is a material structure modification technology developed based on friction stir weldin...

Claims

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Application Information

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IPC IPC(8): B23K20/12B23K20/24B23K103/10
CPCB23K20/1225B23K20/24B23K2103/10
Inventor 秦永强彭宇强田宇陈顺华周士昂吴玉程
Owner HEFEI UNIV OF TECH