Method for producing non-orientation electric steel plates with insulation coatings

A technology for oriented electrical steel sheets and manufacturing methods, which is applied to coatings, manufacturing tools, and other manufacturing equipment/tools, can solve the problems of high manufacturing costs and low production efficiency, and achieve improved bonding, good punching properties, and durability good heat effect

Active Publication Date: 2007-01-31
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to be coated and baked twice, the production cost is high, and the production efficiency is low

Method used

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  • Method for producing non-orientation electric steel plates with insulation coatings
  • Method for producing non-orientation electric steel plates with insulation coatings
  • Method for producing non-orientation electric steel plates with insulation coatings

Examples

Experimental program
Comparison scheme
Effect test

example 1-6

[0035] Example 1-6: Immerse an annealed electrical steel sheet with a thickness of 0.5mm into the following 1%, 5%, 7%, 10%, 12%, 15% and other concentrations of H 3 PO 4 In the solution for a few seconds, after performing post-cleaning, prepare the treatment solution according to the following coating formula:

[0036] a. Chromic acid or chromate containing two or more metals such as Mg, Ca, Zn, etc., with a weight percentage of 2-20%;

[0037] b. Organic resin, the weight percentage is 1-10%;

[0038] c. Reducing agent, the weight percentage is 0.5 to 5%;

[0039] d. Boric acid, the weight percentage is 0.5 to 5%;

[0040] The balance is water.

[0041]The coating is applied on a grooved roller coater, and then it is dried and baked in a baking oven. The baking temperature of the steel plate is controlled at 150~360℃, the baking time is 20~60 seconds, and the thickness of the dry film is controlled at 1.8~2.8. g / m 2 , The results are shown in Table 1.

[0042] Tab...

example 7-12

[0045] The 0.5mm thick electrical steel plate is immersed at room temperature and contains 1%, 5%, 8%, 10%, 12%, 15% and other different contents of H 2 SO 4 After drying, prepare the treatment solution according to the same semi-organic thick coating formula of Example 1-6, and apply it on the grooved roller coater, and then enter the baking oven for drying and baking. The temperature of the steel plate is controlled at 150~360℃, the baking time is 20~60 seconds, and the film thickness is controlled at 1.8~2.8g / m 2 , Examples 7-12, the results are shown in Table 2.

[0046] Table 2 The actual performance of the quality index of the insulating coating

[0047]

example 13-17

[0049] The 0.5mm thick electrical steel plate is immersed at room temperature and contains 1%, 5%, 8%, 12%, 15% and other different contents of H 2 C 2 O 4 After drying, prepare the treatment solution according to the same semi-organic thick coating formula of Examples 1, 2, and 3, and apply it on the grooved roller coater, and then enter the baking oven for drying and baking. The baking temperature is controlled at 150~360℃, the baking time is 20~60 seconds, and the dry film thickness is controlled at 1.8~2.8g / m 2 , Examples 13-17, the results are shown in Table 3.

[0050] Table 3 Performance of the quality index of insulating coating

[0051]

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Abstract

A technology for manufacturing the non-orientation electric steel sheet with coated insulating layer includes such steps as rolling, pre-washing, continuous annealing, acid washing, post-washing, coating, drying and winding.

Description

Technical field [0001] The invention relates to a method for manufacturing a non-oriented electrical steel sheet with an insulating coating. Background technique [0002] Usually, the rolled hard coils of electrical steel go through a continuous annealing unit, rinsed with water and dried in the post-cleaning section, and then directly enter the coating unit, and then are coated and baked on the electrical steel substrate according to the previous semi-organic insulating coating film forming method. Obtain finished electrical steel plates. [0003] As shown in Figure 1 below, the process flow for producing electrical steel in the prior art is: rolling hard coil → pre-cleaning → continuous annealing → post-cleaning → coating → drying and baking → finished coil. [0004] The process conditions for each step of the above process steps are as follows: [0005] The first step is to roll hard coils. The thickness of the hard-rolled coil that has been cold-rolled by the cold tandem mill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04C23G1/02B05D7/14B05D1/28B05D3/02
Inventor 路林林张仁彪
Owner BAOSHAN IRON & STEEL CO LTD
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