With the continuous development of science and technology, a variety of new materials and manufacturing processes have emerged to meet people’s needs for product performance and lightweight. As a key connection element, high-strength aluminum alloy fasteners have been widely used in automotive, aerospace, rail transit and other fields. In order to improve the performance and quality of these fasteners, extrusion casting technology was introduced into the manufacturing process. In this paper, the extrusion casting technology of high strength aluminum alloy fasteners is introduced in detail.
Extrusion casting is an advanced metal forming process in which liquid metal is injected into a cavity and high pressure is applied to make the metal solidify under pressure. Compared with traditional casting processes, extrusion casting has higher density and strength, while being able to produce more complex geometric shapes. In the production of high strength aluminum alloy fasteners, extrusion casting technology can improve the mechanical properties and fatigue resistance of products, and extend the service life.
To carry out extrusion casting, the corresponding equipment and materials need to be prepared. First of all, the extrusion casting machine is the core equipment, which mainly includes the pressurization device, the mold and the cooling system. The pressurization unit is used to provide high pressure, the mold is used to form the casting shape, and the cooling system ensures that the casting is properly cooled during solidification. In addition, it is also necessary to prepare the corresponding aluminum alloy materials, commonly used Al-Si, Al-Mg series of high-strength aluminum alloys. When selecting equipment and materials, select and design according to specific product requirements.
In the process of extrusion casting, it is necessary to strictly control the parameters to ensure the quality and performance of the casting. The first is the casting temperature and casting speed, casting temperature is too high will lead to metal burning, too low will affect the flow of the metal, and the casting speed needs to be adjusted according to the shape and size of the casting. In addition, mold temperature and pressure are also key parameters, mold temperature is too high will lead to premature solidification of the metal, too low will affect the metal formability, the pressure needs to be adjusted according to the requirements of the casting. Through the precise control of these parameters, high quality castings can be obtained.
With the continuous development of technology, the application prospect of extrusion casting technology is more and more broad. In addition to the manufacture of high-strength aluminum alloy fasteners, extrusion casting can also be used to manufacture other aluminum alloy parts with complex shapes, such as automotive engine blocks, wheels, and so on. At the same time, extrusion casting technology has also been widely used in aerospace, rail transit and other fields, which provides strong support for the development of China’s manufacturing industry.
In short, extrusion casting technology, as an advanced metal forming process, is of great significance in the production of high-strength aluminum alloy fasteners. Through the reasonable selection of equipment and materials, as well as the precise control of various process parameters, high-quality, high-performance castings can be obtained to meet the needs of various fields. With the continuous progress of science and technology, the application prospects of extrusion casting technology will be broader, and new vitality will be injected into the development of China’s manufacturing industry.
