In the modern manufacturing industry, high-strength aluminum alloy fasteners are widely used in various structures and mechanical equipment. Due to their significant advantages in improving strength, hardness and corrosion resistance, they are the materials of choice for many critical components. However, there are still some problems in the preparation and use of high-strength aluminum alloy fasteners, such as insufficient toughness and poor corrosion resistance. These problems limit the scope of their use to some extent. In order to solve these problems, this paper will focus on the microalloying and strengthening and toughening technology of high strength aluminum alloy fasteners.
Microalloying technology refers to the optimization of material properties by adding a small amount of alloying elements. For high-strength aluminum alloy fasteners, the added alloying elements are mainly aluminum-titanium, aluminum-magnesium and so on. These elements can form a strengthening phase in aluminum alloys, such as alpha titanium, magnesium aluminum compounds, etc., thereby improving the strength and hardness of aluminum alloys. At the same time, the addition of these elements can also refine the grain of aluminum alloy and improve its toughness.
In microalloying technology, the addition of aluminum-titanium elements is the most common. Aluminum-titanium alloy has high strength, high hardness and good corrosion resistance, and is widely used in various high-strength aluminum alloy fasteners. For example, aluminum-titanium alloy 6061 has excellent processing properties and corrosion resistance, and is widely used in construction, Bridges, automobiles and other fields. Aluminum-magnesium alloy is also a commonly used microalloying material, which can improve the strength and toughness of aluminum alloys, while having good corrosion resistance.
Strengthening and toughening technology means that through certain process treatment, the material has good toughness while maintaining high strength. For high-strength aluminum alloy fasteners, common strengthening and toughening technologies include deformation strengthening and composite strengthening. Deformation strengthening is to refine the grain inside the material by plastic deformation, so as to improve its strength and toughness. Composite strengthening is the combination of two or more different materials to obtain properties that cannot be achieved by a single material.
In the strengthening and toughening technology, an important one is to add aluminum-chromium, aluminum-vanadium and other alloying elements to achieve. These elements can refine the grain of aluminum alloy and improve its strength and toughness. For example, by adding a small amount of aluminum-chromium elements to an aluminum alloy, aluminum-chromium compounds can be formed, which can effectively prevent crack growth, thereby improving the toughness of the aluminum alloy. The addition of aluminum-vanadium can further improve the strength and toughness of aluminum alloy.
In summary, microalloying and strengthening and toughening technologies are of great significance for improving the performance of high-strength aluminum alloy fasteners. Through microalloying technology, the strength, hardness and corrosion resistance of aluminum alloy can be effectively improved. By strengthening and toughening technology, the aluminum alloy can have good toughness while maintaining high strength. The combination of these technologies can make high-strength aluminum alloy fasteners show more superior performance in a variety of complex environments, thus broadening their application range.
