Can 45 steel be magnetized, is it permanent or soft?
Generally speaking, magnetization is a process in which the magnetic small molecules (called magnetic domains) are arranged in one direction under the applied magnetic field so as to exhibit magnetism in macroscopic view.Only ferromagnetic substances are magnetized. Of all the chemical elements, only three elements, iron, cobalt and nickel, belong to ferromagnetic substances, so all magnetic materials have at least one of these three elements.
Water is a paramagnetic substance that cannot be magnetized. But it is said that water molecules can form small molecules in the magnetic field, reducing the association degree.Magnetization does not result in magnetism of a substance that has no magnetism.
45 is a medium carbon steel. It should be a soft magnetic material. It can be magnetized in an external magnetic field, but when it is taken out of the magnetic field, it is almost non-magnetic. But there will be a little bit of magnetic, so some steel after grinding machine needs demagnetization, because the grinder has a fixed material used to fix the electromagnetic chuck. High carbon steel has a certain permanent magnetic properties, some screwdriver head has the ability to attract iron, that is, made of high carbon steel.
