Al-Zn-Mg series aluminum alloy profile material and preparing method thereof

An aluminum alloy profile and aluminum alloy technology, applied in the field of aluminum alloy processing, can solve the problems of high price of scandium, unable to meet the strength requirements, poor corrosion resistance, etc., and achieve the effect of good spalling corrosion resistance

Active Publication Date: 2018-10-12
HUNAN ORIENTAL SCANDIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

7003 and 7005 alloys have good processing and weldability, but the tensile strength is 300-350Mpa, which cannot meet the demand for higher strength
The tensile strength of 7075 and 7050 alloys is 500-600MPa, the elongation is 6-9%, and the strength is high, but the extrusion processing and weldability are poor, and there are problems of poor corrosion resi

Method used

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  • Al-Zn-Mg series aluminum alloy profile material and preparing method thereof
  • Al-Zn-Mg series aluminum alloy profile material and preparing method thereof
  • Al-Zn-Mg series aluminum alloy profile material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] (1) According to 4.8wt% Zn, 2.1wt% Mg, 0.3wt% Li, 0.06wt% Sc, 0.1wt% Zr, 0.3wt% Cu, 0.2wt% Mn, 0.04wt% Ti, remaining Al, preparation , Where Li, Cu, Mn, Zr, Sc, Ti, B are added in the form of a master alloy.

[0040] (2) The electric furnace is used for smelting. The aluminum ingot is added first, and after melting, Al-Cu, Al-Mn, Al-Zr, Al-Sc, Zn, Mg, Al-Li are added in sequence, and the melting temperature is controlled at 740-760 degrees. Stir for 10 minutes, add chlorine and argon mixed gas to degas, let stand for 15-20 minutes, remove slag, add Al-Ti-B wire online, filter by ceramic filter, semi-continuous ingot, pouring temperature is controlled at 720-740 degree.

[0041] (3) Put the ingot of step (2) into an annealing furnace for homogenization annealing, the process conditions are 460-480 degrees, the temperature is kept for 12 hours, and the furnace is cooled.

[0042] (4) Put the ingot of step (3) into a heating furnace and heat it to 520 degrees....

Example Embodiment

[0045] Example 2

[0046] The preparation method of this embodiment is the same as that of embodiment 1. The difference is that before aging, the extruded profiles are not quenched by in-line air, but are placed in a quenching furnace, heated to 460-480 degrees, kept for 1-2 hours, and then cooled by water Quenching and then aging, the aging process is the same as in Example 1.

Example Embodiment

[0047] Example 3

[0048] According to 4.1wt% Zn, 2.40wt% Mg, 0.5wt% Li, 0.08wt% Sc, 0.08wt% Zr, 0.8wt% Cu, 0.4wt% Mn, 0.06wt% Ti, remaining Al, prepare materials, the specific operation steps are the same 于实施例1。 In Example 1.

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Abstract

The invention provides an Al-Zn-Mg series aluminum alloy profile material and a preparing method thereof. Aluminum alloy comprises the following components in a percent by mass: 4.5-5.8% of Zn, 1.8-2.5% of Mg, 0.3-0.8% of Cu, 0.1-0.5% of Li, 0.05-0.2% of Zr, 0.03-0.3% of Sc, 0.2-0.4% of Mn, 0.03-0.06% of Ti and the balance of Al and unavoidable impurities, wherein the mass ratio of Zn to Mg is 1.8-3.2. The aluminum alloy obtained by the application has excellent comprehensive properties. After heat treatment, the tensile strength (Rm) of the aluminum alloy is 500-560MPa, the yield strength (Rp0.2) is 450-520MPa, and the elongation after fracture (As) is 10-17%; and at the same time, the weldability, the extrudable processability and the corrosion resistance are all great.

Description

technical field [0001] The invention relates to an Al-Zn-Mg series aluminum alloy profile and a preparation method thereof, belonging to the technical field of aluminum alloy processing. Background technique [0002] With the light weight requirements of rail transit and automobiles, high-strength aluminum alloys will be widely used. 7003 and 7005 alloys have good processing and weldability, but the tensile strength is 300-350Mpa, which cannot meet the demand for higher strength. The tensile strength of 7075 and 7050 alloys is 500-600MPa, the elongation is 6-9%, and the strength is high, but the extrusion processing and weldability are poor, and there are problems of poor corrosion resistance. Therefore, there is currently no aluminum alloy with better comprehensive performance, which can not only meet the higher strength requirements, but also have better extrusion processing performance, welding, corrosion resistance and so on. [0003] As we all know, scandium element i...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/026C22C1/03C22C21/10C22F1/053
Inventor 陈卫平钱晓泰陈青松王晓平李雄飞刘应超徐定能
Owner HUNAN ORIENTAL SCANDIUM
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