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2XXX series aluminum alloy and preparation method thereof

A technology of aluminum alloy and master alloy, applied in the direction of metal processing equipment, etc., can solve the problems of low strength and poor toughness, achieve the effect of increasing hardness and strength, improving strength and toughness, and reducing industrial cost

Active Publication Date: 2021-04-09
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the embodiment of the present invention aims to provide a 2XXX series aluminum alloy and its preparation method to solve the problems of low strength and poor toughness of the existing 2XXX series aluminum alloys

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  • 2XXX series aluminum alloy and preparation method thereof
  • 2XXX series aluminum alloy and preparation method thereof
  • 2XXX series aluminum alloy and preparation method thereof

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preparation example Construction

[0052] In another aspect, the present invention provides a method for preparing a 2XXX series aluminum alloy, comprising the following steps:

[0053] Step 1: Select pure Al, Al-Cu master alloy, Al-Mg master alloy, Al-Si master alloy, Al-Mn master alloy, Al-Zr master alloy as raw materials by weighing according to the mass percentage of each element;

[0054] Step 2: Refining the raw materials to obtain an aluminum alloy smelting liquid, and casting it into an ingot;

[0055] Melt pure Al at 700-750°C, add Al-Cu master alloy, Al-Si master alloy, Al-Mn master alloy, Al-Mg master alloy, covering agent and refining agent in sequence, and conduct a melting to obtain a primary smelting solution , and then add Al-Zr master alloy for secondary smelting to obtain a secondary smelting liquid, which is cooled and left standing at a temperature of 690-710°C for 0.5-1h. Subsequently, cast the obtained aluminum alloy melting solution at 710-730°C, water pressure 0.02-0.05MPa, and speed 40...

Embodiment 1

[0064] The chemical composition and mass percentage of 2XXX aluminum alloys are: Cu: 4.2%; Mg: 0.73%; Mn: 0.86%; Si: 0.34%; Zr: 0.15%; Ti≤0.1%; Fe≤0.4%; Zn≤ 0.1%; single impurity ≤ 0.05%; total impurity ≤ 0.15%; the balance is Al.

[0065] In this embodiment, the preparation method of 2XXX series aluminum alloy, the steps include:

[0066] Step 1: Select pure Al, Al-Cu master alloy, Al-Mg master alloy, Al-Si master alloy, Al-Mn master alloy, Al-Zr master alloy as raw materials by weighing according to the mass percentage of each element;

[0067] Step 2: After melting pure Al at 740°C, add Al-Cu master alloy, Al-Si master alloy, Al-Mn master alloy, Al-Mg master alloy, expanded perlite and hexachloroethane in turn, and conduct a smelting process. The primary smelting solution was obtained, and then the Al-Zr master alloy was added for secondary smelting to obtain the secondary smelting solution, and the secondary smelting solution was left standing at 690°C for 0.5h. Casting ...

Embodiment 2

[0070] A 2XXX series aluminum alloy prepared from the following elemental components in mass percentage: Cu: 4.5%; Mg: 0.61%; Mn: 0.76%; Si: 0.6%; Zr: 0.15%; Ti≤0.1% ; Fe ≤ 0.4%; Zn ≤ 0.1%; single impurity ≤ 0.05%; total impurity ≤ 0.15%; the balance is Al.

[0071] In this embodiment, the preparation method of 2XXX series aluminum alloy, the steps include:

[0072] Step 1: Select pure Al, Al-Cu master alloy, Al-Mg master alloy, Al-Si master alloy, Al-Mn master alloy, Al-Zr master alloy as raw materials by weighing according to the mass percentage of each element;

[0073] Step 2: After melting pure Al at 740°C, add Al-Cu master alloy, Al-Si master alloy, Al-Mn master alloy, Al-Mg master alloy, expanded perlite and hexachloroethane in turn, and conduct a smelting process. The primary smelting solution was obtained, and then the Al-Zr master alloy was added for secondary smelting to obtain the secondary smelting solution, and the secondary smelting solution was left standing a...

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Abstract

The invention relates to a 2XXX series aluminum alloy and a preparation method thereof, and belongs to the technical field of non-ferrous metal alloys. The problems of low strength and poor toughness of the 2XXX series aluminum alloy in the prior art are solved. The 2XXX series aluminum alloy comprises the following chemical components in percentage by mass: 3.9-4.5 percent of Cu, 0.5-1.0 percent of Mg, 0.5-1.2 percent of Mn, 0.3-0.8 percent of Si, 0.1-0.2 percent of Zr, less than or equal to 0.1 percent of Ti, less than or equal to 0.4 percent of Fe, less than or equal to 0.1 percent of Zn, less than or equal to 0.05 percent of single impurity, less than or equal to 0.15 percent of total impurity and the balance of Al. The preparation method of the 2XXX series aluminum alloy comprises the steps that 1, pure Al, an Al-Cu intermediate alloy, an Al-Mg intermediate alloy, an Al-Si intermediate alloy, an Al-Mn intermediate alloy and an Al-Zr intermediate alloy are weighed according to the mass percent of all the elements to serve as raw materials; 2, the raw materials are refined to obtain an aluminum alloy smelting solution, and cast into a cast ingot; and 3, the cast ingot is sequentially subjected to homogenization, forging and pressing, solution treatment and aging treatment, and the 2XXX series aluminum alloy is obtained. The strength and toughness of the 2XXX series aluminum alloy are improved.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal alloys, and in particular relates to a 2XXX series aluminum alloy and a preparation method thereof. Background technique [0002] The 2XXX series aluminum alloy is a medium-strength aging-strengthenable aluminum alloy, which has many advantages such as low density, high strength and good corrosion resistance, and is widely used in aerospace, marine, automobile and rail transportation and other fields. Aluminum alloy is the preferred material for lightweight. With the increasingly stringent requirements for energy saving and emission reduction, higher requirements are put forward for the performance of aluminum alloy. [0003] The main strengthening phase of Al-Cu-Mg-Si alloy in 2XXX series aluminum alloy is θ'(Al 2 Cu) phase and S'(Al 2 CuMg) phase and β'(Mg 2 Si) phase, in order to improve the strength of 2XXX series aluminum alloys, scientific and technological workers generally focu...

Claims

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Application Information

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IPC IPC(8): C22C21/14C22C21/16C22C21/18C22C1/03C22F1/057B21J5/00
CPCB21J5/002C22C1/026C22C1/03C22C21/14C22C21/16C22C21/18C22F1/057
Inventor 李春明林资源张承基赖文泉胡明伟陈蕴博左玲立张洋陈林李龙飞
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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