How many kinds of aluminium plates are commonly used for dies?
Aluminum moulds have many characteristics, such as high accuracy, long service life, easy processing, multiple recycling and so on. They are very popular moulds in recent years. In the aluminium plate series, there are mainly 5-6 series alloys with medium hardness and 2-7 series alloys with strong hardness, which can be selected by enterprises according to different needs.
2 series aluminium plate belongs to aluminium-copper alloy, the main alloying element is copper. Copper is an important alloying element. It has solution strengthening effect. The aging property of aluminium alloy increases obviously after adding copper. It has obvious strengthening effect on the alloy. The best strengthening effect is when the copper content is between 4% and 6%.
The 5th series aluminium sheet belongs to aluminium-magnesium alloy. In addition to having an accident in die manufacturing, aluminium-magnesium alloy is also the most commonly used aluminium sheet in automobile industry. Magnesium element has obvious strengthening effect on aluminium alloy. The tensile strength of the alloy increases by 34 MPa with the increase of 1% magnesium. Al-Mg alloy has medium strength, strong plasticity, good weldability and rust resistance.
The 6 series aluminium plate belongs to Al-Mg-Si alloy, and the main alloying elements are Mg and Si. Adding silicon element in the alloy can make the aluminum alloy have excellent casting and corrosion resistance. The alloy formed by three elements of Al-Mg-Si according to a certain proportion has excellent properties, and is one of the main materials for manufacturing high-end precision dies.
Series 7 aluminium sheet belongs to Al-Zn-Mg alloy, and the main alloying elements are zinc and magnesium. The strengthening effect of zinc alone on the alloy is not obvious, and it will cause stress corrosion cracking. However, AlZn2 formed by zinc and magnesium has a strong strengthening effect on the alloy. The tensile strength and yield strength of the alloy increase with the increase of the proportion. 7 series aluminium sheet is also an important material in aviation and aerospace industry.