Oriented silicon steel strip with diagonal stripes, and production method thereof

A technology of oriented silicon steel and oblique stripes, which is applied in the field of oriented silicon steel strip and its production, can solve the problems of difficult rapid discharge of water vapor in the inner ring of the steel coil, high tension of the coating coil, and limited effect, so as to achieve the color difference of the bottom layer and the finished product Improvement of color difference in stripes and improvement of air permeability

Active Publication Date: 2015-03-25
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effects of the above measures are limited. First, even if the baking power is increased, the moisture content of the release agent can only be reduced to about 1.5% to 2.0%. Difficult to quickly discharge; third, the above measures will significantly increase production costs

Method used

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  • Oriented silicon steel strip with diagonal stripes, and production method thereof
  • Oriented silicon steel strip with diagonal stripes, and production method thereof
  • Oriented silicon steel strip with diagonal stripes, and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039] Obtain the oriented silicon steel decarburization annealed steel strip according to the conventional production method, select T-groove rolls, the groove depth h is 0.4mm, the groove top width m is 0.2mm, the groove bottom width n is 0.2mm, and the groove angle β is 45°. The groove pitch P is 1mm, and the center line of the groove depth is 45° to the length direction of the roll on the roll surface. , MgO coating with a width of 0.5-2mm and a depth difference of about 0.3mm, followed by high-temperature annealing, and finally an insulating coating and thermal stretch annealing to obtain the final oriented silicon steel product with diagonal stripes. The stripe angle on the finished surface is 43°≤α≤47°, and the stripe width is 1-3mm. 86 volumes were produced using the above method, and the quality of the final product was comparable to that of conventional products of the same period (with vertical stripes, such as figure 1 shown) were compared, and the results are sho...

example 2

[0044] Obtain oriented silicon steel decarburization annealed steel strip according to the conventional production method, select V-shaped groove roller to coat the release agent with MgO as the main component, then perform high temperature annealing, and finally apply insulating coating and thermal stretching annealing to obtain 2 kinds of angles The finished grain-oriented silicon steel products with oblique stripes have a stripe width of 1-3 mm, and 53 rolls and 86 rolls are produced respectively. One kind of finished product has a stripe angle of 47°≤α≤53°, and the other has a finished surface with a stripe angle of 13°≤α≤19°. The quality of the two products was compared, and the results are shown in 2:

[0045] Table 2

[0046]

[0047] It can be seen that the product quality corresponding to the priority angle of the invention example is better.

example 3

[0049] Obtain oriented silicon steel decarburization annealed steel strip according to the conventional production method, adopt T-shaped grooved rolls for selection, the groove depth centerline of the grooved rolls is 0° on the roll surface and the roll length direction, and coated with Al 2 o 3 The main component is the release agent, which forms on the steel strip a transverse Al with an angle of 90° to the strip length direction, a width of 0.5-2mm, and a height difference of 0.3mm. 2 o 3 Texture coating, high temperature annealing, and finally insulating coating and thermal stretching annealing to obtain a mirror-oriented silicon steel with a thickness of 0.26 mm. Final product quality compared with conventional mirror products in the same period (vertical Al 2 o 3 The quality of coating pattern) was compared, and the results are shown in Table 3:

[0050] table 3

[0051]

[0052] It can be seen that the magnetic performance corresponding to the inventive example...

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Abstract

The present invention relates to an oriented silicon steel strip with diagonal stripes, and a production method thereof. The production method comprises: adopting a conventional production method to obtain an oriented silicon steel decarburization annealing steel strip; adopting a roll coating or spray coating method to coat a separation agent on the decarburization annealing steel strip, such that the coated pattern of the separation agent and the steel strip length direction present the angle alpha, wherein the angle alpha is more than or equal to 10 DEG and is less than or equal to 90 DEG or the angle alpha is more than or equal to -90 DEG and is less than or equal to -10 DEG, preferably the angle alpha is more than or equal to 30 DEG and is less than or equal to 90 DEG or the angle alpha is more than or equal to -90 DEG and is less than or equal to -30 DEG, the width of the coated pattern is 0.5-10 mm, and the height difference between the deep position and the shallow position of the coated pattern is 0.1-3 mm; and carrying out high temperature annealing, coating of an insulating coating and hot stretching annealing to obtain the oriented silicon steel finished product with diagonal stripes. According to the present invention, with the separation agent for forming the diagonal coated pattern on the steel strip surface, the air permeability of the steel coil during the high temperature annealing can be improved, the water vapor in the high temperature annealing coil can be rapidly discharged, the defective product reduction rate that the bottom layer defects, wrinkles and edge waves and other defects are reduced is improved, and the bottom layer color difference and the finished product strips color difference are significantly improved, such that the product quality of the oriented silicon steel can be increased under the premise of no significant increase of the cost.

Description

technical field [0001] The invention relates to an oriented silicon steel strip and a production method thereof. Background technique [0002] Generally speaking, the basic chemical composition of grain-oriented silicon steel is Si (2.5-4.0%), C (0.01-0.10%), Mn (0.01-0.1%), S (0.005-0.050%), Als (0.005-0.05%) , N (0.003~0.012%), some composition systems also contain Cu, Mo, Sb, Cr, B, Bi and other elements, and the rest are iron and unavoidable impurity elements. [0003] The common manufacturing process of grain-oriented silicon steel is as follows: first, the steel is made in a converter or an electric furnace, and after secondary refining and alloying, it is continuously cast into a slab; then the slab is heated and kept warm to make the beneficial inclusions partially or fully solidified; and then Hot rolling, coiling after laminar cooling; after the hot-rolled sheet is normalized or not normalized pickling, then the hot-rolled sheet is cold-rolled to the thickness of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/68C21D9/52
Inventor 章华兵曹圣泉黄昌国李国保徐国忠胡卓超李军温光浩
Owner BAOSHAN IRON & STEEL CO LTD
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