Magnesium oxide annealing isolation agent for oriented silicon steel and coating process

An annealing release agent, oriented silicon steel technology, applied in the field of oriented silicon steel processing technology, can solve the problems affecting product quality, bottom layer black, enterprise economic loss, etc., to improve surface quality and adhesion, good adhesion and air permeability, The effect of good reaction characteristics

Active Publication Date: 2018-06-22
新万鑫(福建)精密薄板有限公司
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Problems solved by technology

The quality of the bottom layer of magnesium silicate directly affects the insulation performance and adhesion performance of the finished product, and also affects the surface appearance quality
However, in the production process, due to the lack of research on the reacti

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  • Magnesium oxide annealing isolation agent for oriented silicon steel and coating process
  • Magnesium oxide annealing isolation agent for oriented silicon steel and coating process
  • Magnesium oxide annealing isolation agent for oriented silicon steel and coating process

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[0029] (Example 1)

[0030] The oriented silicon steel annealing separator of the present invention includes: silicon steel grade MgO: 10-12%, TiO 2 : 0.27~0.8%, B: 0.18~0.33%, Re: 0.03~0.08%, the balance is water. Prepare the magnesium oxide coating solution according to the above ratio. The specific types and contents of additives are shown in Table 1. The configuration and coating are carried out according to the following steps:

[0031] Step 1: Configure the magnesium oxide coating solution according to the above formula; the CAA value of silicon steel grade magnesium oxide is 90~145sec at 25°C; specifically: add pure water into the magnesium oxide solution tank, perform sufficient cooling, and then add rare earths. Stir for 30~90min; finally add titanium dioxide, after stirring for 30~60min, add magnesium oxide powder and boron additive, stir for 60~150min; the temperature of the magnesium oxide coating solution is 0~5℃;

[0032] Step 2: Coat the prepared magnesium oxide coati...

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Abstract

The invention relates to a magnesium oxide coating process for oriented silicon steel, in particular to a magnesium oxide coating process for improving the quality of an oriented silicon steel coating. The magnesium oxide coating process comprises the following steps that firstly, magnesium oxide coating liquid is prepared according to the formula of 10-12 % of silicon steel grade MgO, 0.27-0.8% of TiO2, 0.18-0.33% of B, 0.03-0.08% of Re and the balance water; secondly, a steel strip obtained after secondary cold rolling is performed is coated with prepared magnesium oxide coating liquid through a coating machine; and thirdly, drying and coiling are performed through a drying furnace after coating. According to the magnesium oxide coating process, the rare earth elements are innovatively added to the magnesium oxide coating liquid, and through optimized configuration of different components, the rare earth elements and elements such as aluminum, magnesium and silicon in the silicon steel can well form composite oxides, and a pinning effect on the interface is played, so that the better bonding force between the bottom layer formed on the surface of the oriented silicon steel and asubstrate is improved, and the surface quality and adhesion of the oriented silicon steel are improved effectively.

Description

technical field [0001] The invention relates to a processing technology for oriented silicon steel, in particular to a magnesium oxide annealing separator for oriented silicon steel and a coating process. Background technique [0002] Grain-oriented silicon steel is known as a work of art in steel, and it is a soft magnetic alloy with high magnetic flux density, which is mainly used to make iron cores of motors and transformers. At present, in the production process of grain-oriented silicon steel, magnesium oxide (MgO) needs to be coated on the surface of the steel plate before high-temperature annealing. During the annealing process, MgO reacts with the oxide formed on the surface layer of the steel plate substrate to form a magnesium silicate bottom layer. The quality of the bottom layer of magnesium silicate directly affects the insulation performance and adhesion performance of the finished product, and also affects the surface appearance quality. However, in the produ...

Claims

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Application Information

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IPC IPC(8): C21D1/68C21D1/26
CPCC21D1/26C21D1/68
Inventor 蔡伟孟凡娜张维林张爱春
Owner 新万鑫(福建)精密薄板有限公司
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