The 4 series aluminum plate is an aluminum plate with silicon as the key alloy element, that is, aluminum-silicon alloy. The 4-series aluminum plate is used more abroad, but less in China. In terms of production technology, the level of domestic aluminum-silicon alloys is very different from that of Western countries.

Characteristics of 4 series aluminum plate
1. High wear resistance. Aluminum-silicon alloys have high wear resistance. With the increase of silicon content, the strength and compressive strength of aluminum-silicon alloys will increase.
2. The coefficient of linear expansion is small. All raw materials will swell at high temperature, which limits the application scope of most raw materials. The Al-Si alloy has a small coefficient of linear expansion and can work in a high temperature natural environment.
3. Easy to forge. Among the forged aluminum alloys, the 4-series aluminum-silicon alloy accounts for more than 90%, which shows the excellent forging performance of the aluminum-silicon alloy.

The defects of aluminum-silicon alloys have not been properly dealt with at this stage

​4 series aluminum plate

The advantages and disadvantages of 4 series aluminum plate and its application​

Defects of 4 series aluminum plate
1. When the silicon content is low, the specification reliability and resistance to tooth occlusion load of the aluminum-silicon alloy are weak, and the thermal deformation resistance is not very good, and the casting deformation can occur at high temperature.
2. After the silicon content is increased, the strength, compressive strength, wear resistance and corrosion resistance of the aluminum-silicon alloy will be greatly improved, but the drilling performance will be greatly reduced, and the primary silicon of the high-silicon aluminum plate is very high. Stout, if the production and processing are not optimized through mildew, and the basic method is used immediately, the compliance rate of the product will be greatly reduced.

The use of 4 series aluminum plate
Because the 4-series aluminum plate has the characteristics of high compressive strength, good wear resistance, small coefficient of linear expansion, and easy forging, it is the most ideal raw material for the production of vehicle and motorcycle gas turbine piston rods that have been invented and invented so far. The production process of aluminum-silicon alloys in the United States, Japan, Germany and other countries is more excellent. Aluminum-silicon alloys have long been widely used in piston rods and engine blocks of motor vehicles. At present, the basic research in my country is relatively poor, and the production process is weak. , so it is less used.