Search

CN-119369799-B - High-strength and high-toughness corrosion-resistant aluminum-magnesium composite board as well as preparation method and application thereof

CN119369799BCN 119369799 BCN119369799 BCN 119369799BCN-119369799-B

Abstract

The invention belongs to the technical field of metal composite materials, and provides a high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board, and a preparation method and application thereof. The composite board comprises a first aluminum alloy layer, a magnesium alloy layer and a second aluminum alloy layer which are sequentially stacked, wherein the aluminum alloy layer comprises 3.0-5.5% of Mg, 0.3-1.2% of Mn, 0.1-0.4% of Si, 0.15-0.4% of Fe, 0.05-0.75% of Cu, 0.1-0.3% of Sc and the balance of Al, and the magnesium alloy layer comprises 2.0-4.0% of Al, 1.5-4.0% of Ca, 0.2-1.0% of Mn, 0.1-0.5% of Be, 0.5-2.0% of Sn and the balance of Mg. According to the invention, by reasonably setting alloy components and adopting an asynchronous rolling process, the problems of insufficient interface bonding strength and easy generation of brittle and hard second phases in the aluminum-magnesium composite material are effectively solved.

Inventors

  • WANG KUI
  • LUO CHENYANG
  • Jian Puyi
  • WANG XINWEI
  • LIU MANPING

Assignees

  • 江苏大学

Dates

Publication Date
20260508
Application Date
20241024

Claims (9)

  1. 1. The high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board is characterized by comprising a first aluminum alloy layer, a magnesium alloy layer and a second aluminum alloy layer which are sequentially laminated; The first aluminum alloy layer and the second aluminum alloy layer independently comprise the following components, by mass, 3.0-5.5% of Mg, 0.3-1.2% of Mn, 0.1-0.4% of Si, 0.15-0.4% of Fe, 0.05-0.75% of Cu, 0.1-0.3% of Sc and the balance of Al; The magnesium alloy layer comprises, by mass, 2.0-4.0% of Al, 1.5-4.0% of Ca, 0.2-1.0% of Mn, 0.1-0.5% of Be, 0.5-2.0% of Sn and the balance of Mg.
  2. 2. The method for preparing the high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board as claimed in claim 1, which is characterized by comprising the following steps: (1) Mixing the components contained in the first aluminum alloy layer, performing first smelting to obtain a first aluminum alloy, mixing the components contained in the second aluminum alloy layer, performing second smelting to obtain a second aluminum alloy, mixing the components contained in the magnesium alloy layer in a protective atmosphere, and performing third smelting to obtain a magnesium alloy; (2) Carrying out first solid solution treatment on the first aluminum alloy to obtain a first aluminum alloy layer, carrying out second solid solution treatment on the second aluminum alloy to obtain a second aluminum alloy layer, and carrying out third solid solution treatment on the magnesium alloy to obtain a magnesium alloy layer; (3) And stacking the first aluminum alloy layer, the magnesium alloy layer and the second aluminum alloy layer in sequence, and sequentially performing rolling and heat treatment after stacking to obtain the high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board.
  3. 3. The method for preparing the high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board according to claim 2, wherein in the step (1), the temperature of the first smelting and the second smelting are independently 700-770 ℃, and the temperature of the third smelting is 680-750 ℃.
  4. 4. The method for producing a high-strength corrosion-resistant aluminum-magnesium composite panel according to claim 3, wherein the temperature of the first solution treatment and the second solution treatment in the step (2) is independently 500-550 ℃, and the time of the first solution treatment and the second solution treatment is independently 2-12 hours; the temperature of the third solid solution treatment is 450-500 ℃, and the time of the third solid solution treatment is 4-24 hours.
  5. 5. The method for producing a high strength and toughness corrosion-resistant aluminum-magnesium composite panel according to claim 4, wherein the thickness of the first aluminum alloy layer and the second aluminum alloy layer in the step (3) is independently 4-8 mm, and the thickness of the magnesium alloy layer is 6-10 mm.
  6. 6. The method for preparing the high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board according to claim 2 or 5, wherein the rolling pass in the step (3) is more than or equal to 2 times, and the total rolling reduction is 50-85%; the rolling reduction rate of the first pass is 50-75%, the rolling temperature of the first pass is 400-480 ℃, the rolling reduction rate of the remaining passes is 10-15% independently, the rolling temperature of the remaining passes is 400-490 ℃ independently, and the rolling temperature of the remaining passes is not less than the rolling temperature of the first pass.
  7. 7. The method for preparing the high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board according to claim 6, wherein the rotating speed of the upper roller rolled in the step (3) is 5-10 m/min, the rotating speed of the lower roller rolled is 3-8 m/min, and the rolling asynchronous ratio is 1.2-1.6.
  8. 8. The method for preparing the high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board according to claim 7, wherein the temperature of the heat treatment in the step (3) is 200-300 ℃, and the time of the heat treatment is 0.5-2 h.
  9. 9. The use of the high-strength and high-toughness corrosion-resistant aluminum-magnesium composite panel as claimed in claim 1 in aerospace, automobile manufacturing or ocean engineering.

Description

High-strength and high-toughness corrosion-resistant aluminum-magnesium composite board as well as preparation method and application thereof Technical Field The invention relates to the technical field of metal composite materials, in particular to a high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board, and a preparation method and application thereof. Background Aluminum alloys and magnesium alloys are widely used in the fields of aerospace, automobile manufacturing, ocean engineering and the like because of excellent light weight characteristics, high specific strength and corrosion resistance. In particular, magnesium alloys, while generally inferior to aluminum alloys in absolute strength, have a relatively high specific strength (i.e., strength to weight ratio), making them ideal materials for high performance applications where weight reduction is required. However, it is difficult for a single aluminum alloy or magnesium alloy material to meet multiple performance requirements of strength, toughness, corrosion resistance, formability, and the like at the same time under certain complex use environments. To address these performance deficiencies, aluminum-magnesium composites are becoming a hotspot for research and applications. By combining two metal materials of aluminum and magnesium, it is desired to be able to simultaneously exert the corrosion resistance of the aluminum alloy and the high specific strength of the magnesium alloy. However, conventional aluminum-magnesium composite panel manufacturing methods (e.g., mechanical lamination, fusion processes, etc.) have significant drawbacks in terms of interfacial bonding. Particularly during processing, brittle and hard second phases (e.g., mg—al intermetallic compounds) tend to form at the aluminum and magnesium interface, which can lead to reduced interfacial bond strength and reduced toughness and formability of the composite. Furthermore, the large difference in physicochemical properties of aluminum and magnesium makes it difficult to achieve good metallurgical bonding under high temperature treatment. In the prior arts CN109702012, CN109433822 and CN110181227, although attempts are made to reduce the formation of brittle and hard second phases and improve the bonding strength of interfaces by adding specific alloy elements, adjusting the structure of the aluminum-magnesium bonding surface, optimizing the rolling process parameters, etc., the technical challenges are still faced, and it is difficult to simultaneously satisfy the multiple performance requirements of the composite material, such as strength, toughness, corrosion resistance, formability, etc. Therefore, developing an aluminum-magnesium alloy composite board which can effectively reduce the generation of brittle and hard second phases of an aluminum-magnesium interface, improve the metallurgical bonding strength of the aluminum-magnesium interface and the magnesium interface and has good comprehensive performance is still a technical problem in the current material field. Disclosure of Invention The invention aims to provide a high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board, and a preparation method and application thereof, and solves the problems that the interface bonding strength of the existing aluminum-magnesium composite material is insufficient and a brittle and hard second phase is easy to generate in the processing process. Through reasonable alloy component design and processing technology, the invention obviously improves the metallurgical bonding property between aluminum and magnesium layers, improves the mechanical property and corrosion resistance of the material, and the obtained high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board is suitable for the fields of aerospace, automobile manufacturing, ocean engineering and the like, which need light weight, high strength and high corrosion resistance materials. In order to achieve the above object, the present invention provides the following technical solutions: the invention provides a high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board, which comprises a first aluminum alloy layer, a magnesium alloy layer and a second aluminum alloy layer which are sequentially laminated; The first aluminum alloy layer and the second aluminum alloy layer independently comprise the following components, by mass, 3.0-5.5% of Mg, 0.3-1.2% of Mn, 0.1-0.4% of Si, 0.15-0.4% of Fe, 0.05-0.75% of Cu, 0.1-0.3% of Sc and the balance of Al; The magnesium alloy layer comprises, by mass, 2.0-4.0% of Al, 1.5-4.0% of Ca, 0.2-1.0% of Mn, 0.1-0.5% of Be, 0.5-2.0% of Sn and the balance of Mg. The invention also provides a preparation method of the high-strength and high-toughness corrosion-resistant aluminum-magnesium composite board, which comprises the following steps: (1) Mixing the components contained