6Cr3Ni12Mn5Mo无磁钢(4)

According to the composition of steel, non-magnetic steel can be divided into high Ni steel, high Mn steel, high CR-Ni steel, high CR-MN-N steel and so on.
According to the performance division, non-magnetic steel can be divided into austenitic non-magnetic stainless steel and non-magnetic structural steel, the former to ensure the stability of austenite, must add enough Ni and Mn, at the same time to ensure the stainless performance, the mass fraction of Cr in steel should be at least greater than 13%. The non-magnetic structural steels are mostly composed of Fe-Mn non-magnetic steels, which can obtain austenitic structure at room temperature with high Mn and C content, including Fe-Mn, Fe-Mn-Cr and Fe-Mn-Al non-magnetic structural steels.
3, the application
Non-magnetic steel is widely used in electric power, rail transit, construction, national defense and many other fields.
(1) The design stress of the guard ring of the generator used in the electric power industry is high, and the magnetic leakage at the end of the rotor can be reduced by the use of high strength non-magnetic steel; Large nuclear fusion devices, superconducting power generation, transmission and energy storage equipment structure materials need a large number of magnetic steel; The guide mechanism of maglev train requires steel to be magnetic free.