High magnetic induction grain-oriented silicon steel with B800 being more than or equal to 1.94T and production method thereof

Abstract

The invention discloses high magnetic induction grain-oriented silicon steel with B800 being more than or equal to 1.94T. The silicon steel comprises the following components in percentage by weight: 0.045-0.075 percent of C, 2.95-3.35 percent of Si, 0.05-0.20 percent of Mn, 0.005-0.015 percent of S, 0.004-0.010 percent of N, 0.03-0.10 percent of Sn, 0.01-0.1 percent of Cu and 0.020-0.034 percent of Als. The production method comprises the following steps: smelting, performing continuous casting to form a blank, and heating the cast blank; performing segmented hot rolling; normalizing and cooling in a dry total-nitrogen atmosphere; performing aging and cold rolling by using a one-step cold rolling method; decarburizing and annealing; performing nitriding treatment; performing conventional coating of a release agent; coiling and performing conventional high-temperature annealing, wherein the annealing atmosphere refers to dry or wet nitrogen or hydrogen or conventional nitrogen and hydrogen mixed gas; and performing conventional stretching, flattening, papplying insulating coatings and annealing. The cast blank is heated at a low temperature, the process application range is wide, and the number of effective inhibitors is controlled, so that the B800 is more than or equal to 1.94T, and P1.7 / 50 is less than or equal to 0.88W / kg. The silicon steel is used for preparing common transformers, the materials can be saved, and the overload impact resistance can be improved.

Description

Technical field [0001] The invention relates to a kind of oriented silicon steel and a production method, in particular to a kind of B 800 High magnetic induction oriented silicon steel with ≥1.94T and its production method, its production process has wide adaptability. Background technique [0002] At present, the commonly used methods for manufacturing high magnetic induction oriented silicon steel (ie HiB steel) include: high slab heating temperature (above 1350°C) HiB steel manufacturing method, medium slab heating temperature (between 1350°C and 1200°C) HiB steel manufacturing Method and low slab heating temperature (below 1200℃) HiB steel manufacturing method. In the first method, the heating temperature of the slab is too high. In order to obtain stable and excellent magnetic properties, the heating temperature of the slab even needs to be above 1400℃. During the production process, the slab will be burnt out, energy consumption will be large, and the maintenance cost of h...

AI Technical Summary

Problems solved by technology

However, there is no detailed description and regulation of the most important factor affecting secondary recrystallization - the inhibitor

Therefore, during the implementation process, if other processes change, the quality of the secondary recrystallization may also change, and the adaptability of the method is not strong.

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