Progress regulation method of automotive high-formability aluminum alloy heterogeneous structure

A formability and aluminum alloy technology, which is applied in the field of process regulation of high formability aluminum alloy heterostructure for automobiles, can solve the problems of limited improvement in stamping performance of alloy sheets, complex thermal processing process routes, and high production costs, and achieve Elimination of high-temperature and long-term homogenization heat treatment process, improved stamping performance, and reduced production costs

Inactive Publication Date: 2020-04-24
UNIV OF SCI & TECH BEIJING +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to better meet the urgent demand for high-performance aluminum alloy plates for lightweight automobiles, the present invention aims at the complex traditional thermal processing process route of Al-Mg-Si-Cu-Zn alloy plates, high production costs, and the stamping of the produced alloy plates Due to the limited improvement of formability and other shortcomings, a process control method for the heterogeneous structure of Al-Mg-Si-Cu-Zn alloys with high formability for automobiles is proposed

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  • Progress regulation method of automotive high-formability aluminum alloy heterogeneous structure
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  • Progress regulation method of automotive high-formability aluminum alloy heterogeneous structure

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Embodiment 1

[0051]Implementation of the invention Alloy 1# adopts the following intermediate frequency induction melting and casting method. First, all the pure aluminum is added to the crucible and melted. 10wt% Cr, Al-10wt% Ti master alloy, after melting, add Al-50wt% Cu and Al-20wt% Si and other master alloys respectively, then stir the melt with high power for 5min, and then control the temperature above 720°C, Add pure Zn and pure Mg respectively, and press them into the bottom of the melt with a graphite bell jar when adding, take out the bell jar after it is completely melted, adjust the power of the intermediate frequency induction furnace to re-stabilize the temperature of the alloy melt at 740°C, and then remove the slag 1. Add refining agent for degassing and refining; then add Al-5wt%Ti-1wt%B grain refiner when the temperature of the melt is reduced to about 720°C and carry out proper stirring, and finally heat the melt at this temperature for 10 minutes Casting into a steel m...

Embodiment 2

[0053] Implementation of the invention Alloy 1# adopts the following intermediate frequency induction melting and casting method. First, all the pure aluminum is added to the crucible and melted. 10wt% Cr, Al-10wt% Ti master alloy, after melting, add Al-50wt% Cu and Al-20wt% Si and other master alloys respectively, then stir the melt with high power for 5min, and then control the temperature above 720°C, Add pure Zn and pure Mg respectively, and press them into the bottom of the melt with a graphite bell jar when adding, take out the bell jar after it is completely melted, adjust the power of the intermediate frequency induction furnace to re-stabilize the temperature of the alloy melt at 740°C, and then remove the slag 1. Add refining agent for degassing and refining; then add Al-5wt%Ti-1wt%B grain refiner when the temperature of the melt is reduced to about 720°C and carry out proper stirring, and finally heat the melt at this temperature for 10 minutes Casting into a steel ...

Embodiment 3

[0055] Implementation of the invention Alloy 1# adopts the following intermediate frequency induction melting and casting method. First, all the pure aluminum is added to the crucible and melted. 10wt% Cr, Al-10wt% Ti master alloy, after melting, add Al-50wt% Cu and Al-20wt% Si and other master alloys respectively, then stir the melt with high power for 5min, and then control the temperature above 720°C, Add pure Zn and pure Mg respectively, and press them into the bottom of the melt with a graphite bell jar when adding, take out the bell jar after it is completely melted, adjust the power of the intermediate frequency induction furnace to re-stabilize the temperature of the alloy melt at 740°C, and then remove the slag 1. Add refining agent for degassing and refining; then add Al-5wt%Ti-1wt%B grain refiner when the temperature of the melt is reduced to about 720°C and carry out proper stirring, and finally heat the melt at this temperature for 10 minutes Casting into a steel ...

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Abstract

The invention discloses a progress regulation method of an automotive high-formability aluminum alloy heterogeneous structure, and belongs to the technical field of aluminium alloy. The progress regulation method comprises the following steps of configuring the automotive high-formability Al-Mg-Si-Cu-Zn alloy, smelting the alloy through medium-frequency induction in non-vacuum, and casting the alloy in a cold cooling steel die for cooling; performing short-time low-temperature structure stability treatment; taking out an ingot heated in short time from a heating furnace, and directly performing hot rolling treatment; performing two-stage thermal treatment to regulate the distribution state of alloy primary iron-rich phase and a solute element; performing hot rolling, cold rolling, intermediate annealing and cold rolling treatment in sequence; performing high-temperature short-time solid-solution treatment, and then carrying out quench cooling on the alloy test sample subjected to solid-solution treatment from the solid-solution treatment temperature to room temperature; and transferring a quenched test sample in an ageing furnace for cooling and preliminary ageing treatment. The treatment method can effectively control the crystal grain in the alloy and the size and the distribution of a precipitating phase, and the heterogeneous structure having remarkable prompting effects onthe alloy formability is formed.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, especially for the still not high formability and bending performance of the aluminum alloy outer panels of the vehicle body, and the application status of the continuous improvement of these performance requirements in the automobile field, and proposes a high formability aluminum alloy for automobiles. The process control method of microstructure can effectively control the size and distribution of grains and precipitated phases in the alloy, and form a heterogeneous microstructure that can significantly promote the formability of the alloy. Background technique [0002] With the continuous improvement of the industrialization level of countries in the world, a series of energy crises and environmental problems have become more and more serious. Energy conservation and emission reduction have become the main theme of current social production and life. Under this theme, countries have a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/053C22C1/03C22C21/10
CPCC22C1/026C22C1/03C22C21/10C22F1/053
Inventor 郭明星庄林忠张济山吴长旻邹小俊王磊齐珮欣
Owner UNIV OF SCI & TECH BEIJING
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