Basically, induction heating of aluminum is one of the most effective ways of heating aluminum alloys. Aluminum has unique properties, unlike the other metals, making it not easy to be heated by induction. It needs certain environmental conditions and equipment with certain properties so that aluminum becomes a material that can be used.
In this article, you will find a brief introduction to the process of induction heating of aluminum.
In order to heat the aluminum by induction, first, we must consider several factors that you should identify and calculate. We need to ensure that the heating process will be completed properly.
These factors must be taken into consideration when using the heating equipment. Moreover, we need to ensure good performance of this equipment.
These factors are also the characteristics of aluminum alloys as follows: –
Aluminum alloy density is between 2700 – 2800 kg / m3. This means that when placing an aluminum rod in a magnetic field, it will be affected by the magnetic field quickly. In other words, it means that the heating process is easy and quick.
The external temperature in which you place the aluminum alloy during the heating process must be adjusted with high accuracy. You need to be careful because there is a temperature that makes the alloy reach the state of stiffness and become non-configurable.
For example, the heating temperature of aluminum alloy 7075, which is very close to the degree of its transformation to the non-configurable solid.
So, You must adjust the induction heating temperature and the external temperature carefully, so that the heating process is properly induced.
According to this equation, high-resistance materials have larger skin depths than low-resistance materials. For example, consider independently the heating (from room temperature) of two equally long, round 70-mm billets – one aluminum alloy 6061 (AL6061) and the other stainless-steel alloy 304 (SS304).
Aluminum alloys are, as we know, non-magnetic. You should know that aluminum alloys do not attract magnetic flow lines as strongly as carbon alloys and steels do.