Decarburization annealing in protective atmosphere
Decarburization annealing is one of the steps in the cold pickling aluminum strip cleaning continuous pickling line. Under a protective atmosphere (such as inert gases such as nitrogen and argon), the strip is heated to react the carbon element in the strip with oxygen or hydrogen in the atmosphere to reduce the carbon content of the strip. In this process, the protective atmosphere can be precisely controlled, and the heating temperature can be precisely adjusted. By optimizing the annealing process parameters, the strip can be decarburized, oxidation and uneven decarburization can be avoided, and the magnetic properties and mechanical properties of the strip can be improved.
Recrystallization, annealing, and grain growth
Recrystallization annealing is another link in the cold pickling line. Under a protective atmosphere, the strip is heated at a high temperature to optimize the grain structure, improve the magnetic permeability of the strip, and reduce iron loss. In the recrystallization annealing process, accurate control of the heating rate, holding time, and cooling rate is important for obtaining the ideal grain structure and magnetic properties. By adopting the pickling line process and electrical control system, accurate control and optimization of the recrystallization annealing process can be achieved.
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