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Rare-earth-free low-alloy high-toughness aluminum alloy and preparation method thereof

A low-alloy, aluminum alloy technology, applied in the field of metal materials and metal material processing, can solve the problems of low yield strength of aluminum alloys, and achieve the effects of excellent surface quality, low cost and low price

Pending Publication Date: 2022-08-09
SHANDONG NANSHAN ALUMINUM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low yield strength of existing aluminum alloys, and provide low-alloy high-strength and tough aluminum alloys containing no rare earth and its preparation method

Method used

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  • Rare-earth-free low-alloy high-toughness aluminum alloy and preparation method thereof
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  • Rare-earth-free low-alloy high-toughness aluminum alloy and preparation method thereof

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specific Embodiment approach 1

[0023] Embodiment 1: This embodiment is a low-alloy, high-strength and tough aluminum alloy without rare earth, which is composed of Al and alloying elements, and the mass fraction of alloying elements is ≤10%, and the balance is Al; the alloying elements are composed of Cu, Mg , Ag, Mn, Zr, Sb, Be and Cr, and the mass fraction of Cu in the low-alloy high-strength and tough aluminum alloy without rare earth is 5% to 6%, the mass fraction of Mg is 0.2% to 1.0%, and the mass fraction of Ag is The mass fraction is 0.2-0.5%, the mass fraction of Mn is 0.2-0.4%, the mass fraction of Zr is 0.2-0.4%, the mass fraction of Sb is 0.2-0.3%, the mass fraction of Be is 0.2-0.3%, and the mass fraction of Cr is 0.2-0.3%. The fraction is 0.1-0.2%, the balance is Al, and the total mass fraction of Cu, Mg, Ag, Mn, Zr, Sb, Be and Cr is less than or equal to 10%.

specific Embodiment approach 2

[0024] Embodiment 2: As described in Embodiment 1, this embodiment is a preparation method of a rare earth-free low-alloy high-strength aluminum alloy, which is specifically completed according to the following steps:

[0025] 1. Casting: using pure Al, pure Mg, pure Sb and Al-Cu master alloy Al-Ag master alloy, Al-Mn master alloy, Al-Zr master alloy, Al-Be master alloy, Al-Cr master alloy as raw materials, Smelting and casting in sequence to obtain a cast alloy; the mass fraction of Cu in the cast alloy is 5%-6%, the mass fraction of Mg is 0.2%-1.0%, the mass fraction of Ag is 0.2-0.5%, and the mass fraction of Mn is 0.2-0.5%. The mass fraction is 0.2-0.4%, the mass fraction of Zr is 0.2-0.4%, the mass fraction of Sb is 0.2-0.3%, the mass fraction of Be is 0.2-0.3%, the mass fraction of Cr is 0.1-0.2%, and the balance is Al, and the total mass fraction of Cu, Mg, Ag, Mn, Zr, Sb, Be and Cr≤10%;

[0026] 2. Homogenization treatment: place the cast alloy in a resistance heating...

specific Embodiment approach 3

[0033] Embodiment 3: The difference between this embodiment and Embodiment 2 is that: in step 1, pure Al is first placed in a crucible, and the temperature is raised to 680-760°C, and the pure Al is completely melted at a temperature of 680-760°C. Then pure Mg and Al-Cu master alloy Al-Ag master alloy and Al-Mn master alloy were added in sequence, mechanically stirred for 15min-30min at a temperature of 680-760°C, and then allowed to stand for 15-30min to obtain an alloy melt, and then The alloy melt is made into an ingot by a metal mold water-cooling solidification process to obtain a cast alloy. Others are the same as in the second embodiment.

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Abstract

The invention discloses a rare-earth-free low-alloy high-toughness aluminum alloy and a preparation method thereof, and relates to the field of metal materials and metal material processing, in particular to an aluminum alloy and a preparation method thereof. The invention aims to solve the problem of low yield strength of the existing aluminum alloy, and provides the rare-earth-free low-alloy high-toughness aluminum alloy and the preparation method of the rare-earth-free low-alloy high-toughness aluminum alloy. The rare-earth-free low-alloy high-toughness aluminum alloy is composed of Al and alloy elements, the mass fraction of the alloy elements is smaller than or equal to 10%, and the balance is Al. The alloy elements are composed of Cu, Mg, Ag, Mn, Zr, Sb, Be and Cr. The preparation method comprises the following steps: 1, smelting and casting to obtain cast alloy; 2, homogenization treatment; 3, machining; 4, extruding and deforming; and 5, carrying out aging heat treatment to obtain the rare-earth-free low-alloy high-toughness aluminum alloy. The steel has the advantages that the yield strength at room temperature reaches 486-540 MPa, the tensile strength reaches 584-630 MPa, and the ductility is 9.0% or above. The method is mainly used for preparing the rare earth-free low-alloy high-toughness aluminum alloy.

Description

technical field [0001] The invention relates to the field of metal materials and metal material processing, in particular to an aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum and aluminum alloys are known as "21st century green and environmental protection engineering materials" due to their excellent properties such as low density, high specific strength, abundant reserves and easy recycling. Development and other aspects have great prospects for development. [0003] After 60 years of development, the application field of aluminum alloy is still far less than that of aluminum alloy and steel, and the commercialization process is greatly hindered. The main reason is that aluminum alloy still has some significant defects: ① low yield strength and tensile strength, It cannot meet the demand for high-strength aluminum alloys in the high-tech field; ② the elongation is low and the plasticity is poor, and brittle fractures are prone to o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/16C22C1/03C22F1/057
CPCC22C21/16C22C1/03C22C1/026C22F1/057
Inventor 王绍俊沈现猛李喆姚玉战桂芳王婷婷王广彦徐海波丁岩杨焕军王仁武马旭
Owner SHANDONG NANSHAN ALUMINUM
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