KR940009346A

KR940009346A - Method of manufacturing non-oriented electrical steel sheet with excellent magnetic properties

Info

Publication number: KR940009346A
Application number: KR1019920018617A
Authority: KR
Inventors: 배병근; 김종근; 김종구
Original assignee: 정명식; 포항종합제철 주식회사; 백덕현; 재단법인산업과학기술연구소
Priority date: 1992-10-09
Filing date: 1992-10-09
Publication date: 1994-05-20
Also published as: KR950004933B1

Abstract

본 발명은 각종모터, 발전기 소형변압기, 안정기등의 전기기기의 철심으로 사용되는 무방향성 전기강판의 제조방법에 관한 것으로서, 철손이 낮고 자손밀도와 투자율이 높은 자성이 우수한 무방향성 전기강판의 방법을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a method for manufacturing non-oriented electrical steel sheet used as iron cores of electric machines such as various motors, generator small transformers, ballasts, etc., and has a low loss of iron and high magnetic density and high magnetic permeability. I want to provide it, and its purpose is.

본 발명은 중량%로, C : 0.02%이하, Si : 3.5%이하, Mn : 0.5%이하, P : 0.15%이하, S : 0.015%이하, Al : 0.7%이하, O : 0.005%이하, N : 0.008%이하, Sn과 Sb중 1종 또는 2종의 합 : 0.02-0.3%, Ni : 0.02-1.0%, Cu : 0.02-0.4%, 잔부 Fe 및 기타불가피하게 함유되는 불순물로 조성되는 슬라이브를 가열한 열간압연시 마무리압연온도가 800˚C이상의 페라이트상에서 압하율이 최소 7% 이상이 되게 압연하고 열연판을 600˚C이상에서 권취한 다음 대기중에서 냉각한 후 산세하고 1단 냉각압연법 혹은 1차 냉간압연하고 중간소둔후 2차 냉간 압연하는 2단냉간압연법으로 냉간압연후 700˚C이상 1100˚C이하의 온도에서 10초 이상 10분 이하로 고온소둔하는 자성이 우수한 무방향성 전기강판의 제조방법을 그 요지로 한다.The present invention is by weight, C: 0.02% or less, Si: 3.5% or less, Mn: 0.5% or less, P: 0.15% or less, S: 0.015% or less, Al: 0.7% or less, O: 0.005% or less, N : Less than 0.008%, one or two sums of Sn and Sb: 0.02-0.3%, Ni: 0.02-1.0%, Cu: 0.02-0.4%, remainder Fe and other inevitable slabs In the hot rolling with hot rolling, the finish rolling temperature is rolled up to at least 7% in ferritic phase above 800˚C. The hot rolled sheet is wound at 600˚C. After cooling in air, it is pickled and pickled. Or non-oriented electric with high magnetic annealing for 10 seconds or more and 10 minutes or less at temperature of 700˚C or more and 1100˚C after cold rolling by primary cold rolling and secondary cold rolling after secondary annealing The manufacturing method of a steel plate is made into the summary.

Description

Method of manufacturing non-oriented electrical steel sheet with excellent magnetic properties

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

제1도는 압축시험한 후 바로공냉된 변형조직과 압축변형후 시간당 10˚C로 냉각한 후의 조직을 나타내는 조직사진,Figure 1 is a tissue photograph showing the deformed tissue immediately after the compression test and the structure after cooling to 10 ° C per hour after compression deformation,

제2도는 열간압연시 마무리 압연온도에 따른 자기적성질을 나타내는 그래프,2 is a graph showing the magnetic properties according to the finish rolling temperature during hot rolling,

제3도는 열간압축시험온도에 따르는 열간압축시험후 공냉한 조직을 나타내는 조직사진.FIG. 3 is a tissue photograph showing an air-cooled structure after a hot compression test according to the hot compression test temperature.

Claims

By weight% C: 0.02% or less, Si: 3.5% or less, Mn: 0.5% or less, P: 0.15% or less, S: 0.015% or less, Al: 0.7% or less, O: 0.005% or less, N: 0.008% or less , Heated by heating one or two of Sn and Sb: 0.02-0.3%, Ni: 0.02-1.0%, Cu: 0.02-0.4%, balance Fe and other inevitable impurities When rolling, hot rolling is carried out at a rate of 7% or more on ferrites with a rolling temperature of 800 ° C or higher, wound at 600 ° C or higher, and then cooled in the air by a conventional method, followed by pickling. Secondary cold rolling after secondary cold rolling and secondary annealing After cold rolling, high temperature annealing for 10 seconds-10 minutes in the temperature range of 700˚C-1100˚C Method for producing oriented electrical steel sheet.

The method of manufacturing a non-oriented electrical steel sheet having excellent magnetic properties according to claim 1, wherein the cooling rate of the wound hot rolled coil is 30 ° C / hr or less.

※ Note: The disclosure is based on the initial application.