site logo

How to demagnetize 304 stainless steel sheet?

How to demagnetize 304 stainless steel sheet?

How to demagnetize 304 stainless steel sheet? The following is introduced by China Wuxi JiaNuo stainless steel to you. We first need to know how the magnetism of 304 stainless steel plate is generated? In the smelting or forging process, the composition bias or improper heat treatment will lead to a small amount of martensite or ferrite in 304 stainless steel plate. As a result, 304 stainless steel plate will have weak magnetic properties. In addition, the organization of 304 stainless steel plate after cold working will also be transformed into martensitic stainless steel. The greater the cold working deformation, the better the martensitic phase transformation and magnetic properties of 304 stainless steel sheet.

Do you know how to demagnetize 304 stainless steel plate?

1, in order to completely eliminate the magnetic properties of 304 stainless steel plate, can be heated to a high temperature single-phase zone by high-temperature solution treatment of the alloy and maintain a constant temperature, so that the excess phase in the solid solution is fully dissolved and rapidly cooled, so as to obtain a heat treatment process of supersaturated solid solution. Restore the stable austenite structure to eliminate magnetism. Specific method: 304 stainless steel plate heated to about 1050 ℃, quenching with cold water. 304 stainless steel plate in the carbide produced carburization. This method is suitable for workpieces requiring heat treatment and welded workpieces. 2, apply alternating decay magnetic field: energize the DC welder to demagnetize: clamp one welding fixture of the welder to one end of the material, and then clamp the other welding fixture to the opposite end of the 304 stainless steel plate. The current gradually decreases and can be performed several times; however, the time should not be too long and the number of times should not be too many, otherwise the welder is easy to burn out.

In addition, 304 stainless steel plate there are other demagnetization methods.

(1) Magnetic cleaning: In paleomagnetic research, the use of external magnetic fields to deal with the process of unstable components in rock magnetism, called magnetic cleaning.

(2) Thermal magnetic cleaning: in paleomagnetic research, the process of dealing with unstable components in rock magnetism (interference factors) by heating or low temperature, known as thermal magnetic cleaning.

(3) Chemical magnetic cleaning: in paleomagnetic research, the process of chemical treatment of unstable components in rock magnetism, known as chemical magnetic cleaning.

Generally speaking, austenitic 304 stainless steel plate is non-magnetic or weakly magnetic, but may also be magnetic due to fluctuations in chemical composition or melting caused by different processing states. In order to completely eliminate the magnetic properties of 304 stainless steel sheet, the magnetic properties can be eliminated by restoring the stable austenite organization through high temperature solution treatment. Have you learned the demagnetization of 304 stainless steel plate?