The use of aluminum-silicon alloys

【China Aluminum Network】 Aluminum-silicon alloy is a forged and cast alloy mainly composed of aluminum and silicon. It generally contains 11% of silicon. At the same time adding a small amount of copper, iron, nickel to increase strength. The density is 2.6 to 2.7 g/cm3. Thermal conductivity of 101 ~ 126W / (m · °C). Young's modulus 71.0 GPa. Impact value 7 ~ 8.5J. Fatigue limit ±45MPa.

Aluminum-silicon alloy has the following uses:

1. In aluminum-silicon alloys containing silicon in excess of the Al-Si eutectic point (silicon 11.7%), the silicon particles can significantly increase the wear resistance of the alloy to form a type of wear-resistant alloy with a wide range of uses.

2. It is used to make low-medium-intensity castings with complex shapes, such as cover plates, motor cases, brackets, etc., and also used as brazing solder.

3, aluminum-silicon alloy is a strong composite deoxidizer, in the steel-making process instead of pure aluminum can increase the deoxidizer utilization, and can purify liquid steel, improve the quality of steel. Deoxidized steel ingots, commonly referred to as stabilization steels, can be oxidized to alumina after deoxidation of aluminum. Alumina can refine austenite grains. Therefore, aluminum deoxidized steels have good mechanical properties.

4, silicon aluminum alloy density, low thermal expansion coefficient, casting performance and good wear resistance, with its casting alloy castings have a high impact resistance and good high-pressure density, can greatly increase the service life, commonly used in its production Aerospace vehicles and auto parts.