Low-temperature ultrahigh magnetic induction oriented silicon steel with B800 greater than or equal to 1.962T and production method

Abstract

The invention provides low-temperature ultrahigh magnetic induction oriented silicon steel with B800 greater than or equal to 1.962T. The low-temperature ultrahigh magnetic induction oriented siliconsteel is prepared from the following components in percentage by weight: 0.015 percent to 0.095 percent of C, 2.80 percent to 3.60 percent of Si, 0.020 percent to 0.032 percent of Als, 0.0050 percentto 0.0100 percent of N, 0.010 percent to 1.00 percent of Mn, 0.0030 percent to 0.0150 percent of S, 0.0015 percent to 0.100 percent of Bi, and the balance of P, Cu, Sn, Sb, Cr and As with the sum which is not more than 0.80 percent; a production method comprises the following steps: smelting and carrying out continuous casting to form a blank; heating the casting blank; carrying out hot rolling; coiling; normalizing; carrying out cold rolling after acid pickling; decarburizing and annealing; carrying out nitridation treatment; spraying an isolation agent; carrying out high-temperature annealing with secondary heat preservation; stretching and flattening, and spraying an insulating coating. According to the low-temperature ultrahigh magnetic induction oriented silicon steel provided by theinvention, one or more of the Bi, the P, the Cu, the Sn, the Sb, the Cr and the As are added and the high-temperature annealing with the secondary heat preservation and the like are carried out, so that the finished-product steel plate obtains an ultrahigh magnetic induction effect with the magnetic induction intensity B800 which is not less than 1.962T, and the magnetic performance is stable.

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, in the production of high magnetic induction oriented silicon steel, according to the different inhibitor systems, the billet is heated to a high temperature above 1280°C. Although higher magnetic properties of the finished product can be obtained, there will be more oxide slag and large burning loss. , reduced yield, high furnace repair frequency, and many product surface defects. In order to solve this problem, the technicians in this technical field have proposed to use a lower casting billet heating temperature (heating temperature ≤ 1280°C) for production through experimental research. Existing problems, and can also reduce the cost of energy consumption in production. At present, the industrial production of grain-oriented ...

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Problems solved by technology

Although this document is a cold rolling process of low-temperature hot rolling and nitriding treatment, due to the use of conventional high-temperature annealing process, that is, high-temperature annealing in a heat preservation method, the magnetic induction of the finished product does not reach the effect of B800≥1.960T ultra-high magnetic induction , still unable to meet the requirements of higher-end users

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