KR970043221A

KR970043221A - Non-oriented electrical steel sheet with low iron loss and manufacturing method

Info

Publication number: KR970043221A
Application number: KR1019950049559A
Authority: KR
Inventors: 배병근; 차상윤
Original assignee: 김종진; 포항종합제철주식회사
Priority date: 1995-12-14
Filing date: 1995-12-14
Publication date: 1997-07-26
Also published as: KR100256356B1

Abstract

본 발명은 모터, 발전기, 그리고 소형 변압기등의 전기기기의 철심으로 사용되는 무방향성 전기강판에 관한 것으로, Sn과 Cr을 첨가하여 강을 조성하고, 이의 열간압연 및 냉간압연후 최종 소둔조건을 적절히 제어하므로서, 철손이 낮은 무방향성 전기강판을 제조하는 방법을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a non-oriented electrical steel sheet used as an iron core of an electric machine such as a motor, a generator, and a small transformer, wherein the steel is formed by adding Sn and Cr, and the final annealing conditions after hot rolling and cold rolling are appropriately adjusted. By controlling, to provide a method for producing a non-oriented electrical steel sheet having a low iron loss, an object thereof.

이하, 본 발명에 대하여 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated.

상기한 목적을 달성하기 위한 본 발명은 중량%로, C: 0.015% 이하, Si: 1.0-3.5%, Mn: 0.5% 이하, P: 0.15% 이하, S: 0.005% 이하, Al: 1.0% 이하, Sn: 0.03-0.3%, Cr: 0.05-0.5%, N:0.007% 이하, 상기 (Si+Al): 1.5% 이상, 잔부 : Fe 및 기타 불가피하게 첨가되는 불순물로 조성되는 철손이 낮은 무방향성 전기강판 및 이와 같이 조성되는 강슬라브를 1300℃ 이하로 재가열한 후, 열간압연하여 800-Al의 온도범위에서 마무리하고 대기중에서 권취냉각한 후, 열연판을 950-1100℃의 온도범위에서 30초-10분 동안 연속소둔하고, 이어 1회 냉간압연 혹은 중간소둔을 포함하는 2회 냉간압연한 다음, 900-1050℃의 온도범위에서 최종 소둔하는 철손이 낮은 무방향성 전기강판의 제조방법에 관한 것을 그 요지로 한다.The present invention for achieving the above object by weight, C: 0.015% or less, Si: 1.0-3.5%, Mn: 0.5% or less, P: 0.15% or less, S: 0.005% or less, Al: 1.0% or less , Sn: 0.03-0.3%, Cr: 0.05-0.5%, N: 0.007% or less, (Si + Al): 1.5% or more, remainder: Fe lossless non-oriented iron loss composed of impurities and other unavoidable impurities After reheating the steel sheet and the steel slab formed in this manner to 1300 ° C. or lower, hot rolling, finishing in a temperature range of 800-Al, winding and cooling in the air, and then hot-rolling the plate in a temperature range of 950-1100 ° C. for 30 seconds. A continuous annealing for 10 minutes, followed by two cold rollings including one cold rolling or intermediate annealing, followed by final annealing in the temperature range of 900-1050 ° C. That's the point.

Description

Non-oriented electrical steel sheet with low iron loss and manufacturing method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims

By weight%, C: 0.015% or less, Si: 1.0-3.5%, Mn: 0.5% or less, P: 0.15% or less, S: 0.005% or less, Al: 1.0% or less, Sn: 0.03-0.3%, Cr: Low iron loss non-oriented electrical steel sheet, characterized in that the composition is composed of 0.05-0.5%, N: 0.007% or less, the (Si + Al): 1.5% or more, the balance: Fe and other unavoidable impurities.

In the method for producing a non-oriented electrical steel sheet, in weight%, C: 0.015% or less, Si: 1.0-3.5%, Mn: 0.5% or less, P: 0.15% or less, S: 0.015% or less, Al: 1.0% or less , Sn: 0.03-0.3%, Cr: 0.05-0.5%, N: 0.007% or less, (Si + Al): 1.5% or more, remainder: Fe slab composed of Fe and other unavoidable impurities 1300 ℃ After reheating to below, hot rolling, finishing in the temperature range of 800-Al, winding and cooling in the air, the hot rolled sheet is continuously annealed for 30 seconds to 10 minutes in the temperature range of 950-1100 ° C, and then cold once After cold rolling twice including rolling or intermediate annealing, and then annealing in the temperature range of 900-1050 ℃ low iron loss non-oriented electrical steel sheet production method.

The method of manufacturing a non-oriented electrical steel sheet having low iron loss according to claim 2, wherein the winding temperature is 500 to 800 ° C.