Automotive low-cost high-formability aluminum alloy material and preparation method thereof

A technology of aluminum alloy materials and aluminum alloy sheets, which is applied in the field of low-cost and high-formability aluminum alloy materials for automobiles and its preparation, can solve the problems of low production cost, unsatisfactory stamping performance and bending performance, and reduce production costs , Excellent paint hardening properties, excellent stamping performance and the effect of bending performance

Inactive Publication Date: 2015-02-25
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the present invention aims at the problem that the stamping performance and bending performance of Al-Mg-Si alloys for automo...

Method used

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  • Automotive low-cost high-formability aluminum alloy material and preparation method thereof
  • Automotive low-cost high-formability aluminum alloy material and preparation method thereof
  • Automotive low-cost high-formability aluminum alloy material and preparation method thereof

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Embodiment 1

[0036] Implement the invention alloys 1#, 2# and 3# after smelting and casting, and homogenize them. The treatment process is: start to heat up at a heating rate of 20°C / h, wait for the temperature to reach 540-560°C for 14 hours, and then use The cooling rate of 20°C / h is taken out when the temperature of the furnace is lowered to 100°C. After homogenization, the ingot is cut and milled, reheated to 520-560°C for hot rolling, the pass reduction is 3%-30%, the total deformation of hot rolling is >93%, and the final rolling temperature is lower than 300°C ;The hot-rolled plate is heated to 350-550°C at a heating rate of 30°C / h for 1.2h annealing treatment, cooled by air cooling, and then cold-rolled to a thickness of 1mm, and the pass reduction is at 8 ~30%, the total deformation is 50~88%; then directly cut the sample from the cold-rolled plate and place it in a heat treatment furnace at 545~555°C for 3min solution treatment, and the heating rate of the sample is greater than ...

Embodiment 2

[0038] After implementing the invention alloys 1# and 2#, after smelting and casting, they are homogenized. The treatment process is: start heating at a heating rate of 20°C / h, wait for the temperature to reach 540-560°C for 14 hours, and then heat at 20°C / h The cooling rate of h is to take out the sample when the temperature of the furnace is lowered to 100 °C. After homogenization, the ingot is cut and milled, reheated to 520-560°C for hot rolling, the pass reduction is 3%-30%, the total deformation of hot rolling is >93%, and the final rolling temperature is lower than 300°C ;The hot-rolled plate is heated to 350-550°C at a heating rate of 30°C / h for 1.2h annealing treatment, cooled by air cooling, and then cold-rolled to a thickness of 1mm, and the pass reduction is at 8 ~30%, the total deformation is 50~88%; then directly cut the sample from the cold-rolled plate and place it in a heat treatment furnace at 545~555°C for 3min solution treatment, and the heating rate of the...

Embodiment 3

[0040] Implement the invention alloy 4# and 5# after smelting and casting, and homogenize them. The treatment process is: start heating at a heating rate of 30°C / h, wait for the temperature to reach 540-560°C for 21 hours, and then heat at 30°C / h The cooling rate of h is to take out the sample when the temperature of the furnace is lowered to 100 °C. After homogenization, the ingot is cut and milled, reheated to 520-560°C for hot rolling, the pass reduction is 3%-30%, the total deformation of hot rolling is >93%, and the final rolling temperature is lower than 300°C ;The hot-rolled plate is heated to 350-550°C at a heating rate of 200°C / h for 2h annealing treatment, cooled by air cooling, and then cold-rolled to a thickness of 1mm, and the pass reduction is between 8 and 3. 30%, the total deformation is 50-88%; then directly cut the sample from the cold-rolled plate and place it in a heat treatment furnace at 545-555°C for 7min solution treatment, and the heating rate of the s...

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Abstract

The invention discloses an automotive low-cost high-formability aluminum alloy material and a preparation method thereof. The preparation method includes that solute elements like Mg, Si, Cu, Zn and Fe which can be brought in recycling and regenerating of aluminum alloy are utilized fully, composition optimizing and processing and heat treatment process control are performed additionally, and a proper amount of solute element Zn which is brought in can effectively promote forming of Mg-Si solute atom cluster or transition phase so as to increase paint-baking hardening increment of the alloy; a proper amount of element Fe which is brought in and other solute elements Si, Cu and Mn can form intermetallic compound particles different in size, size, shape, texture component and density of recrystallized grain of the alloy can be controlled well by utilizing the intermetallic compound particles, recrystallized texture component and density can be matched well, and an aluminum alloy plate which is made finally can show excellent punching formability and edge bending performance. The alloy is quite suitable for being used for manufacturing outer plates of an automobile body, especially for manufacturing parts in complex shapes and with high requirements on punching formability, edge bending performance and paint-baking hardening increment.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and relates to a novel low-cost high-formability aluminum alloy material that can be applied industrially and a preparation method thereof, especially for the special requirements on formability and bending performance of aluminum alloy materials used for body outer panels in the automotive field The development can ensure that the anisotropy of the aluminum alloy sheet is well controlled before forming, and has excellent stamping and bending properties. Background technique [0002] With the continuous increase of the number of automobiles, the air pollution and climate deterioration caused by exhaust emissions cannot be ignored. Countries around the world are increasingly aware of automobile energy conservation and emission reduction. Therefore, how to achieve the purpose of reducing vehicle weight and energy saving and emission reduction has become the key to the further development of...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03C22F1/043
CPCC22C1/026C22C1/03C22C21/02C22F1/002C22F1/043
Inventor 郭明星庄林忠张济山汪小锋邢辉
Owner UNIV OF SCI & TECH BEIJING
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