Nitriding device and nitriding method for grain-oriented silicon steel

Abstract

The invention provides a nitriding method for oriented silicon steel applied in the field of metallurgy technology. The invention also relates to a nitriding device for oriented silicon steel. The nitriding step of the nitriding method of the oriented silicon steel nitriding method is as follows: The roll (7) is energized to make the hydrogen ionization in the cleaning and activation section (2), and the surface of the silicon steel (13) to be treated is cleaned and activated; the silicon steel (13) to be treated enters the nitriding section (3), and the ions 13) Carry out nitriding treatment; the silicon steel (13) to be treated enters the sealing chamber (4), and the rear conductive sealing roller (8) in the sealing chamber (4) is energized to remove the oxide layer on the surface of the silicon steel (13) to be treated, and the nitriding is completed Treatment, the oriented silicon steel nitriding device and nitriding method described in the present invention make the surface of the steel strip clean and active, make the ammonia nitriding process fast and uniform, and the processing quality of the oriented silicon steel is high.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, especially the technical field of oriented silicon steel production equipment and processing methods. More specifically, it relates to a method for nitriding oriented silicon steel, and the invention also relates to a nitriding device for oriented silicon steel. Background technique [0002] Oriented silicon steel (orientated electrical steel strip) is produced by smelting qualified molten steel through converters and RH. The molten steel is continuously cast into thick billets. The thick billets are heated at high temperature and thinned by hot rolling to a thickness suitable for cold rolling. The hot-rolled steel strip can obtain magnetic materials with very low longitudinal iron loss and very high magnetic induction through normalization, shot peening, pickling, cold rolling, decarburization annealing, coating, long-term high-temperature annealing, and hot-stretching leveling. Generally spe...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: during the decarburization and nitriding process of the continuous production line for oriented silicon steel (oriented electrical steel strip, electrical steel), due to the existence of the surface inert layer, the nitriding incubation period is too long and the nitriding time is too long. Instable, so that the technical problem of poor nitriding effect of grain-oriented silicon steel is improved. By cleaning and activating the surface of grain-oriented silicon steel before nitriding (decarburization), the surface of the steel strip is clean and active, so that ammonia can be carried out Nitriding method for grain-oriented silicon steel with fast and uniform nitriding process and high processing quality of grain-oriented silicon steel

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