Economy high magnetic induction grain-oriented silicon steel and production method thereof

Abstract

Economy high magnetic induction grain-oriented silicon steel comprises the following components according to weight percent: 0.015 to 0.095 percent of C, 2.80 to 3.60 percent of Si, 0.010 to 0.015 percent of Als, 0.0050 to 0.0100 percent of N, 0.010 to 1.00 percent of Mn, 0.0030 to 0.0150 percent of S, 0.0015 to 0.100 percent of Bi, as well as P, Cu, Sn, Sb, Cr and Ar, of which the sum is no morethan 0.80 percent; a production method comprises the following steps: smelting and continuously casting to form a blank; heating the blank; carrying out segmented hot rolling; reeling; normalizing; carrying out one-step cold rolling after acid pickling; carrying out decarburizing annealing; coating a high temperature annealing isolation agent; carrying out high temperature annealing with secondaryheat insulation; stretching and smoothing, and coating an insulating coating. According to the invention, under a condition of not carrying out nitriding, steel plate magnetic induction intensity B800 is not lower than 1.930T, iron loss P17 / 50 is smaller than or equal to 1.08W / k, the magnetic performance is stable, and the cost is lowered by 5 percent or more by compared with that in the prior art.

Description

technical field [0001] The invention relates to an oriented silicon steel and a production method thereof, in particular to a high magnetic induction oriented silicon steel and a production method thereof. Background technique [0002] At present, according to the different inhibitor systems, there are three representative technologies for the industrial production of high-temperature slab heating oriented silicon steel, all of which can obtain higher magnetic properties of the finished product. However, heating the slab at a high temperature of 1400 °C will cause many problems, such as increased oxide slag, large burning loss, reduced yield, high furnace repair frequency, increased manufacturing cost, and many product surface defects. These problems can be effectively avoided by using a lower billet heating temperature, and at the same time, the energy consumption cost in production can be reduced. At present, the industrial production of grain-oriented silicon steel heate...

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