A method for forming and preparing aluminum alloy plate with high alloy content

An aluminum alloy plate and aluminum alloy technology, applied in metal rolling and other directions, can solve the problems of weakening, deformation and failure, and achieve the effect of improving strength, strength and plasticity, and omitting heat treatment steps

Active Publication Date: 2022-01-25
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Weaken or eliminate casting structural defects through sub-rapid solidification technology; change the edge stress distribution of the rolled plate through the edge shape control technology of adding steel thin plate between the sample and the roll, and use liquid nitrogen cryogenic control to control the local temperature of the sample, which significantly improves the quality of the casting. The processing and forming properties of high-alloy-content aluminum alloys solve the problem of premature local deformation and failure of high-alloy-content aluminum alloys during the rolling deformation process, and realize the simultaneous improvement of strength and plasticity of high-alloy content aluminum alloys

Method used

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  • A method for forming and preparing aluminum alloy plate with high alloy content
  • A method for forming and preparing aluminum alloy plate with high alloy content
  • A method for forming and preparing aluminum alloy plate with high alloy content

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Experimental program
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Effect test

Embodiment 1

[0025] (1) Sub-rapid solidification microstructure control technology: use commercially pure aluminum and pure magnesium to prepare a cast aluminum-magnesium alloy blank (hereinafter referred to as Al-9Mg) with a magnesium content of 9wt%, and then reduce the magnesium content to 9wt% in a resistance furnace The cast aluminum-magnesium alloy blank is heated to obtain molten aluminum-magnesium alloy, and then the molten aluminum-magnesium alloy is cast in a sub-rapid water-cooled copper mold and cooled to room temperature. By adjusting the cooling water flow rate, the cooling rate is 105K / s, so that the components of the alloy are fully dissolved, and the plate after sub-rapid solidification is obtained;

[0026] (2) Edge-controlled local temperature-controlled rolling technology: Process the plate after sub-rapid solidification in step (1) into a 20mm×40mm×5mm cuboid rolling sample, and use steel plates with a thickness of 0.9mm on the upper and lower surfaces of the sample C...

Embodiment 2

[0029] (1) Sub-rapid solidification microstructure control technology: using commercially pure aluminum and pure magnesium to prepare as-cast aluminum with a magnesium content of 9wt%-

[0030] Magnesium alloy billet (hereinafter referred to as Al-9Mg), then in the resistance furnace, the cast aluminum-magnesium alloy billet with a magnesium content of 9wt% is heated to obtain a molten aluminum-magnesium alloy, and then the molten aluminum-magnesium alloy is heated in a sub- Cast and cool to room temperature in a rapid water-cooled copper mold. By adjusting the cooling water flow rate, the cooling rate is 143K / s, so that the components of the alloy are fully dissolved, and the plate after sub-rapid solidification is obtained;

[0031] (2) Edge-controlled local temperature-controlled rolling technology: Process the plate after sub-rapid solidification in step (1) into a 20mm×40mm×5mm cuboid rolling sample, and use steel plates with a thickness of 0.9mm on the upper and lower sur...

Embodiment 3

[0034](1) Sub-rapid solidification microstructure control technology: use industrial pure aluminum, pure magnesium and aluminum-scandium master alloy to prepare as-cast aluminum-magnesium-scandium alloy material (hereinafter referred to as Al-7Mg) with a magnesium content of 7wt% and a scandium content of 0.3wt%. -0.3Sc). In the resistance furnace, the cast aluminum-magnesium-scandium alloy material with a magnesium content of 7wt% is heated to obtain the molten aluminum-magnesium-scandium alloy material, and then the molten aluminum-magnesium-scandium alloy material is heated in a sub-rapid water-cooled copper Cast in the mold and cool to room temperature. By adjusting the cooling water flow rate, the cooling rate is 120K / s, so that the components of the alloy are fully dissolved, and the plate after sub-rapid solidification is obtained;

[0035] (2) Edge-controlled local temperature-controlled rolling technology: Process the plate after sub-rapid solidification in step (1) i...

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Abstract

The invention relates to a method for forming and preparing aluminum alloy plates with high alloy content. The preparation method includes two steps of sub-rapid solidification structure control and edge-controlled local temperature-controlled rolling. First, the sub-rapid solidification structure control technology is used to cool the alloy. The speed is 105-160K / s, so as to realize the full solid solution of each component of the alloy and weaken the as-cast structure defects such as macro segregation of alloy elements. Subsequently, a high-magnesium-content aluminum alloy sheet with good formability and high strength and plasticity was prepared by edge-controlled local temperature-controlled rolling. Compared with the traditional rolling process, the aluminum alloy plate prepared by the method of the present invention has higher yield strength, tensile strength and elongation at break, and the plate also has the advantages of good formability and high work hardening; the method of the present invention is simple in process, Reliable and suitable for mass production.

Description

technical field [0001] The invention relates to the field of non-ferrous metal materials, in particular to a method for forming and preparing aluminum alloy plates with high alloy content. Background technique [0002] Aluminum alloy has the advantages of low density, high specific strength, good formability, good welding performance, fatigue resistance, and strong corrosion resistance. It has broad application prospects in transportation, navigation, aerospace and other industrial fields. With the needs of the market, people have higher requirements for the strength and plasticity of aluminum alloys. Although the high-alloy content aluminum alloys prepared by high-pressure torsion, equal channel angular extrusion, mechanical metallurgy and other large plastic deformation methods have high strength, they usually have low work-hardening ability, and it is difficult to have high strength and high plasticity at the same time, which seriously limits the high-strength plasticity....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06B22D27/04B21B1/22C22F1/047
CPCC22C21/06B22D27/04B21B1/22C22F1/002C22F1/047
Inventor 查敏殷皓亮张洪敏田滕贾海龙邱丰王慧远宋家旺马品奎
Owner JILIN UNIV
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