Aluminum metal is one of the most abundant elements in the earth’s crust, and its content reaches 8.8%, ranking first among the four major metal elements, accounting for 1/3 of the mass of the entire metal element, and has very rich aluminum metal reserves. Due to improvements in aluminum technology, the aluminum industry has grown at an alarming rate, and the world’s annual production is increasing every year. By 2004, world aluminum production reached 29.8 million tons.
There are more than 1,000 kinds of aluminum alloys, and the aluminum disc circle made of aluminum metal is one of them. Due to its lightweight, high specific strength, good low-temperature performance, good plasticity, easy processing, and corrosion resistance, this aluminum alloy wafer has been widely used in the fields of construction, aerospace industry, vehicle manufacturing, pressure vessels, and transportation. application.
Among the aluminum circles, the 5000 series aluminum alloy circle is widely used. The 5 series aluminum alloy disc has high strength, good plasticity, corrosion resistance, and weldability. The 5 series aluminum alloy belongs to a1-mg series aluminum. Disc circle is a non-heat-treatable reinforced aluminum alloy with medium strength and a wide range of applications, especially in the construction industry, transportation, and kitchenware manufacturing.
5000 series aluminum alloy circle has a strict production process, not only to ensure the quality of aluminum circles such as strength and hardness but also to have many requirements on the metal surface of aluminum circles. In terms of production and preparation, various manufacturers have different molding processes. There are many factors affecting the quality of aluminum wafers in the production process, such as ingot surface quality, die structure, extrusion process, etc., but the important factors affecting the performance of profiles are the extrusion process and heat treatment process. Therefore, in the extrusion production process of 5 series aluminum alloy profiles, the aluminum alloy composition should be reasonably designed, and the extrusion process parameters and heat treatment process parameters should be reasonably selected to improve the surface quality of the aluminum alloy profiles and improve the tensile properties and corrosion resistance of the aluminum alloy. performance to meet customer needs.
Although the 5 series aluminum circle has been used for a long time, there are still many improvements, and the quality can be further improved. In order to better produce 5 series aluminum alloy circle, some manufacturers have developed new metal proportions and process methods: The 5 series aluminum alloy raw materials are in the following proportions: si≤0.08%, fe≤0.3%, cu≤0.1 %, mn≤0.1%, mg: 2.2~2.3%, cr: 0.1~0.2%, ti: 0.15~0.2%, single impurity≤0.05%, total impurities≤0.15%, the balance is al, the prepared 5 The aluminum alloy raw materials are added into the melting furnace and evenly mixed, and then smelted into liquid aluminum alloy, and the liquid aluminum alloy is smelted into aluminum alloy round ingots; then the aluminum alloy round ingots obtained from a are subjected to secondary homogenization treatment, and then the natural furnace Cool to 440±5℃; the aluminum alloy round ingot after homogenization treatment is placed in an extruder for extrusion, the extruded aluminum alloy profile is subjected to online air cooling treatment, and the subsequently cooled aluminum alloy profile is pulled by traction The straightening machine is used for stretching and straightening, so that the final prepared 5-series aluminum alloy profiles have good surface quality and meet customer needs in mechanical properties, strength meets requirements, elongation after fracture is significantly improved, and corrosion resistance is strong.