How to solve the magnetic problem of thick wall spiral custom pipeline?

　　Thick wall spiral custom pipeline generally has no magnetism or weak magnetism, but if there is magnetism, it will also have an impact on our use. Therefore, for many manufacturers, it is still very necessary to eliminate the magnetism of thick wall spiral custom pipeline pipe.

　　The reason why the thick wall spiral custom pipeline is magnetic is that martensite or ferrite is magnetic, and a few martensite or ferrite arrangements in Austenitic 304 stainless steel will be formed due to component segregation or improper heat treatment during exercise. In this way, there will be weak magnetism in the thick wall spiral custom pipeline.

　　In order to completely eliminate the magnetism of the thick wall spiral custom pipeline formed by the above reasons, the stable austenite arrangement can be opened through high-temperature solid solution treatment, and then the magnetism can be eliminated. In particular, it should be pointed out that the magnetism of the thick wall spiral custom pipeline formed due to the above reasons is weak compared with that of stainless steel of other raw materials, that is, the magnetism of the thick wall spiral custom pipeline has always been weak.

　　Through cold working, the arrangement structure of thick wall spiral custom pipeline will also transform to martensite. The greater the cold working deformation, the more martensite transformation, and the greater the magnetism of thick wall spiral custom pipeline. Like the steel strip of the same batch number, it is produced Φ 76 tube, no significant magnetic induction, production Φ 9.5 pipe. Due to the large cold bending deformation, the magnetic induction is significant. The deformation of square rectangular tube is larger than that of circular tube, especially the angle part. The deformation of thick wall spiral custom pipeline is more intense and the magnetism is more significant.