Coated semi-processed non-oriented electrical steel sheet and manufacturing method thereof

A kind of oriented electrical steel, semi-process technology, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of low production efficiency and increased cost of bell furnace annealing, to save the leveling process, improve production efficiency, shorten production The effect of cycle time and lead time

Inactive Publication Date: 2010-02-24
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the production efficiency of annealing in a bell furnace is low, and it needs to go through a smoothing process, so the cost increases

Method used

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  • Coated semi-processed non-oriented electrical steel sheet and manufacturing method thereof
  • Coated semi-processed non-oriented electrical steel sheet and manufacturing method thereof
  • Coated semi-processed non-oriented electrical steel sheet and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First, according to the mass percentage of chemical composition carbon: 0.0030%, silicon: 1.15%, manganese: 0.35%, sulfur: 0.0035%, aluminum: 0.25%, nitrogen: 0.0040%, phosphorus: 0.035%, smelting steel, continuous casting to make plates The slab is heated at a temperature of 1120°C in a hot rolling furnace.

[0030] Finish rolling was performed at a finish rolling temperature of 900°C, followed by coiling at a temperature of 550°C. The 2.6mm thick hot-rolled steel strip is cold-rolled to 0.5mm thick in the pickling and rolling unit, and then annealed for 2 minutes in the electrical steel continuous annealing coating unit under the condition of 650-750°C and full nitrogen dry atmosphere, and the strip is The steel is finished with a semi-organic coating. When the annealing temperature is between 650~750℃, the iron loss is 4.20~4.33w / kg, the magnetic induction is 1.713~1.716T, and the value changes little at different annealing temperatures; the hardness HV1 is between ...

Embodiment 2

[0037] First, according to the chemical composition carbon: 0.0025%, silicon: 1.65%, manganese: 0.50%, sulfur: 0.0045%, aluminum: 0.60%, nitrogen: 0.0020%, phosphorus: 0.016%, smelting steel, continuous casting into slab. The slab is heated at a temperature of 1150° C. in a hot rolling furnace.

[0038] Finish rolling was performed at a finish rolling temperature of 860°C, followed by coiling at a temperature of 600°C. The normalization treatment at 980°C is carried out in the normalization unit, and then the 2.6mm thick hot-rolled steel strip is cold-rolled to 0.5mm thick in the pickling and continuous rolling unit, and then the electric steel continuous annealing coating unit is heated at 650-800℃, Anneal for 3 minutes under the condition of full nitrogen dry atmosphere, and apply semi-organic coating to the steel strip to make the finished product. When the annealing temperature is between 650-800°C, the iron loss is 2.68-2.90w / kg, the magnetic induction is 1.738-1.745T, a...

Embodiment 3

[0045] First, according to the chemical composition carbon: 0.0018%, silicon: 2.00%, manganese: 0.35%, sulfur: 0.0025%, aluminum: 0.50%, nitrogen: 0.0014%, phosphorus: 0.050%, steel is smelted and continuously cast into slabs. The slab is heated at a temperature of 1120° C. in a hot rolling furnace.

[0046] Finish rolling was performed at a finish rolling temperature of 860°C, followed by coiling at a temperature of 600°C. The normalization treatment at 950°C is carried out in the normalization unit, and then the 2.6mm thick hot-rolled steel strip is cold-rolled to 0.5mm thick in the pickling and continuous rolling unit, and then the electric steel continuous annealing coating unit is heated at 650-800℃, Anneal for 3 minutes under the condition of full nitrogen dry atmosphere, and apply semi-organic coating to the steel strip to make the finished product. , when the annealing temperature is between 650 and 800°C, the iron loss is 2.63 to 2.86w / kg, the magnetic induction is 1...

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Abstract

The invention provides a coated semi-processed non-oriented electrical steel sheet and a manufacturing method thereof. The steel sheet comprises the following chemical compositions in percentage by mass: less than or equal to 0.003 percent of C, 1.00 to 2.30 percent of Si, 0.20 to 1.00 percent of Mn, 0.01 to 0.10 percent of P, 0.20 to 0.80 percent of Al, less than or equal to 0.005 percent of S, less than or equal to 0.005 percent of N, and the balance of Fe and inevitable impurities. The manufacturing method does not need electromagnetic stirring in slab continuous casting; when the content of Si is between 1.65 to 2.30 percent, a normalizing treatment procedure is added before the step of pickling; and an annealing condition is that: a temperature is between 650 and 800 DEG C, the annealing time is between 1 and 4 minutes and the annealing is carried out in a dry atmosphere of whole nitrogen. The coated semi-processed non-oriented electrical steel sheet has low iron loss, high magnetic induction, good mechanical property, simple procedure and low production cost.

Description

technical field [0001] The invention relates to an electrical steel plate, in particular to a semi-process non-oriented electrical steel plate. Background technique [0002] Non-oriented electrical steel is mainly used as motor core, and can be divided into three grades according to the difference of Si content, high, medium and low. Among them, the Si content of medium grade non-oriented electrical steel is generally 1.00% to 2.30%. With the improvement of electromagnetic properties, medium-grade non-oriented electrical steel has reached the level of high-grade, but when it is used instead of high-grade, its mechanical properties are low, which often affects the roundness and punching of the punched core during processing. processing speed. Therefore, in addition to the magnetic properties of medium-grade non-oriented electrical steel, users also pay great attention to the mechanical properties of electrical steel, and usually require its hardness HV1 to reach 150 to 200. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C21D9/52C21D8/02
CPCC21D8/02C22C38/02C22C38/06C21D9/52C22C38/04C21D8/12
Inventor 陈晓陆永强赵河山
Owner BAOSHAN IRON & STEEL CO LTD
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