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A kind of non-oriented electrical steel sheet with low cost and extremely low aluminum and its manufacturing method

A technology of oriented electrical steel plate and manufacturing method, applied in the field of steel plate and its manufacturing, can solve the difficult problems of low iron loss, high magnetic induction, and increase the manufacturing cost of finished steel plate, and achieve low iron loss, good economy, control alloy cost effect

Active Publication Date: 2022-07-15
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, studies have shown that in the electromagnetic performance indicators of non-oriented electrical steel sheets, iron loss and magnetic induction are mutually restricted, and it is difficult to achieve low iron loss and high magnetic induction at the same time, unless normalization of hot-rolled steel sheets or Bell furnace annealing treatment, etc., but this will greatly increase the manufacturing cost of the finished steel plate

Method used

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  • A kind of non-oriented electrical steel sheet with low cost and extremely low aluminum and its manufacturing method
  • A kind of non-oriented electrical steel sheet with low cost and extremely low aluminum and its manufacturing method
  • A kind of non-oriented electrical steel sheet with low cost and extremely low aluminum and its manufacturing method

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Embodiment 1-6 and comparative example 1-6

[0061] Table 1 lists the mass percentage of each chemical element in the non-oriented electrical steel sheets of Examples 1-6. It should be noted that the inevitable impurities in steel mainly include: Nb, V, Ti, Ca, Mg and REM.

[0062] Table 1. (wt%, balance is Fe and other unavoidable impurities)

[0063]

[0064] The non-oriented electrical steel sheets of the embodiments 1-6 of the present invention are all prepared by the following steps:

[0065] (1) Smelting: After blast furnace molten iron and appropriate amount of scrap steel are smelted by converter, decarburization, deoxidation and alloying are completed in sequence in RH refining, and then cast into qualified slabs. During the deoxidation and alloying of RH refining, ferrophosphorus, ferrosilicon and ferromanganese are added in sequence, wherein, in ferrosilicon, Al≤0.1%, Ti≤0.03%;

[0066] (2) Continuous casting;

[0067] (3) Hot rolling: control the rolling temperature to be 1050-1150°C, the final rolling te...

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Abstract

The invention discloses a low-cost and extremely low-aluminum non-oriented electrical steel sheet, which contains the following chemical elements in the following mass percentages: C≤0.003%, Si: 0.1%-1.2%, Mn: 0.1%-0.4%, P : 0.01% to 0.2%, S≤0.003%, Als≤0.001%, O: 0.003% to 0.01%, N≤0.003%, Sn: 0.005% to 0.05%, and satisfying Si 2 / P: 0.89 to 26.04. In addition, the present invention also discloses a method for manufacturing the above-mentioned non-oriented electrical steel sheet, which comprises the steps of: (1) smelting; (2) continuous casting; (3) hot rolling: wherein the hot rolled sheet is not subjected to normalization treatment or normalization after coiling. Bell furnace annealing, but using the residual heat of the hot-rolled steel coil for soaking and heat preservation; (4) one-time cold rolling; (5) continuous annealing. The non-oriented electrical steel sheet of the present invention adopts reasonable chemical composition and process design, not only has excellent economy, but also has the characteristics of high magnetic induction and low iron loss.

Description

technical field [0001] The present invention relates to a steel sheet and a manufacturing method thereof, in particular to a non-oriented electrical steel sheet and a manufacturing method thereof. Background technique [0002] For a long time, non-oriented electrical steel sheets have been developing in two directions: one is high-efficiency and high-grade steel with high manufacturing cost and complex production process, but excellent electromagnetic and mechanical properties; Simple, medium and low grade steel with excellent electromagnetic properties and mechanical properties. [0003] According to statistics, due to different application occasions, the number of medium and low grade non-oriented electrical steel sheets accounts for 70% or more of all non-oriented electrical steel sheets. Therefore, it is of great practical significance to study how to produce medium and low grade non-oriented electrical steel sheets more economically and conveniently, and further improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C21D8/12C21D1/74C21C7/06C21D1/26
CPCC22C38/004C22C38/02C22C38/04C22C38/008C21D8/1222C21D8/1233C21D8/1272C21D1/74C21C7/06C21C7/0006C22C38/002C22C33/06C21D8/1205C21D8/1261C21D1/76C22C38/001C22C38/06C21D9/46C21D6/008C21D6/005C21D1/26H01F1/147C21D2201/00
Inventor 张峰沈侃毅宗震宇李国保房现石
Owner BAOSHAN IRON & STEEL CO LTD
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