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Non-oriented electrical steel for thin slab continuous casting-continuous rolling production and method thereof

A thin slab continuous casting and oriented electrical steel technology, applied in metal rolling and other directions, can solve the problems of not easy to block the nozzle, easy to block the nozzle, poor magnetic properties, etc., and achieve the effects of not easy to block, simple production process, and low aluminum content

Inactive Publication Date: 2011-07-27
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that the nozzles are easily blocked or even broken, and the magnetic properties are poor and unstable in the continuous casting process of non-oriented electrical steel produced by thin slab continuous casting and rolling. Cold-rolled non-oriented electrical steel produced by thin slab continuous casting and rolling, which is not easy to block, has high magnetic induction, low iron loss, stable magnetic performance and simple process, and method thereof

Method used

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  • Non-oriented electrical steel for thin slab continuous casting-continuous rolling production and method thereof
  • Non-oriented electrical steel for thin slab continuous casting-continuous rolling production and method thereof
  • Non-oriented electrical steel for thin slab continuous casting-continuous rolling production and method thereof

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Embodiment Construction

[0035] The following is a detailed description in the form of a table:

[0036] Non-oriented electrical steel produced by continuous casting and rolling of thin slabs, the chemical composition and weight percentage of the following examples are: C: ≤0.008%, Si: 0.15~2.2%, Al: ≤0.008%, Mn: 0.15~ 1.5%, P: 0.004~0.15%, S: ≤0.008%, [O] ≤ 40PPm, N: ≤0.005%, Ti: ≤0.008%; process and process parameters are selected according to the following steps and range :

[0037] A method for producing non-oriented electrical steel produced by continuous casting and rolling of thin slabs, the steps of which are as follows:

[0038] 1) Carry out converter smelting and vacuum treatment;

[0039] 2) Continuous casting into a slab with a thickness of 50-90 mm, and the casting speed is controlled at 3-5 m / min;

[0040] 3) Soak in the tunnel furnace, and the soaking temperature is controlled at 1000-1200°C;

[0041] 4) Carry out continuous rolling with seven rolling mills, and control the final ro...

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Abstract

The invention relates to non-oriented electrical steel and a production method thereof. The non-oriented electrical steel comprises the following chemical compositions in percentage by weight: less than or equal to 0.008 percent of C, 0.15 to 2.2 percent of Si, less than or equal to 0.008 percent of Al, 0.15 to 1.5 percent of Mn, 0.004 to 0.15 percent of P, less than or equal to 0.008 percent of S, less than or equal to 40PPm of [O], less than or equal to 0.005 percent of N, less than or equal to 0.008 percent of Ti, and the balance of iron and inevitable impurities. The production method comprises the following steps of: smelting by using a converter and performing vacuum treatment; continuously casting into slabs with the thickness of 50-90 millimeters; soaking in a tunnel kiln; continuously rolling by using seven mills; coiling; performing pickling; performing cold rolling; performing recrystallization annealing; and obtaining the steel for later use. The alloy is reasonable in design and is not needed to be subjected to calcium treatment; the procedures are simple; the cost is reduced; the defect of low casting property in thin slab continuous casting-continuous rolling production can be effectively overcome; the advantages on cost and magnetic property of the non-oriented electrical steel in the thin slab continuous casting-continuous rolling production are fully shown, and the market competitiveness of the product is greatly improved.

Description

technical field [0001] The invention relates to a non-oriented electrical steel and a production method thereof, in particular to a cold-rolled non-oriented electrical steel with stable castability and excellent magnetic properties and a production method using thin slab continuous casting and rolling. Background technique [0002] The production of non-oriented electrical steel by thin slab continuous casting and rolling has the characteristics of greatly saving energy, improving the yield, shortening the process flow, etc., which greatly reduces the production cost; the production of non-oriented electrical steel by thin slab continuous casting and rolling can realize low-temperature heating and high-temperature final Rolling and high-temperature coiling have the conditions to prepare non-oriented electrical steel with excellent magnetic properties; the soaking process of thin slab continuous casting and rolling can ensure uniform temperature of slab and rolling process, an...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C33/04C21D8/02C21D8/12B21B1/46
CPCC22C38/14C22C33/04C21D8/02C22C38/002C21D8/1272C22C38/04C21D8/1233C22C38/004C21D8/1211C22C38/06C22C38/02B21B1/46C21D8/12C22C38/001C21D8/1205
Inventor 欧阳页先骆忠汉柳志敏夏春祥祝晓波李大明黄璞叶九美王春峰刘义韬冯大军胡友国杜光梁孙竹石文敏
Owner 武汉钢铁有限公司
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