KR940009347A

KR940009347A - Non-oriented electrical steel sheet with excellent permeability and its manufacturing method

Info

Publication number: KR940009347A
Application number: KR1019920018618A
Authority: KR
Inventors: 배병근; 우종수
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: KR950004934B1

Abstract

본 발명은 각종모터, 발전기 소형변압기, 등의 전기기기의 철심으로 사용되는 무방향성 전기강판에 관한 것으로서, 투자율이 우수한 무방향성 전기강판 및 그 제조방법을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a non-oriented electrical steel sheet used as an iron core of electrical equipment such as various motors, generator small transformer, etc., to provide a non-oriented electrical steel sheet having excellent permeability and its manufacturing method.

본 발명은 중량%로 C : 0.02~0.06%, Si : 3.5%이하, Mn : 0.5%이하, P : 0.15%이하, S : 0.01%이하, N : 0.008%이하, Al : 0.7%이하, Ni : 0.02-1.0%, Cu : 0.02-0.05%, 잔부 Fe 및 기타불가피하게 함유되는 불순물로 조성되는 투자율이 우수한 무방향성 전기강판 및 그 제조방법을 그 요지로 한다.In the present invention, C: 0.02 ~ 0.06%, Si: 3.5% or less, Mn: 0.5% or less, P: 0.15% or less, S: 0.01% or less, N: 0.008% or less, Al: 0.7% or less, Ni A non-oriented electrical steel sheet having excellent permeability composed of: 0.02-1.0%, Cu: 0.02-0.05%, balance Fe and other unavoidable impurities, and a manufacturing method thereof.

Description

Non-oriented electrical steel sheet with excellent permeability and its manufacturing method

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

Claims

By weight% C: 0.02% or less, Si: 3.5% or less, Mn: 0.5% or less, P: 0.15% or less, S: 0.01% or less, N: 0.008% or less, Al: 0.7% or less, Ni: 0.02-1.0 %, Cu: 0.02-0.05%, balance Fe and other non-oriented electrical steel sheet having excellent permeability, characterized in that it is composed of impurities contained inevitable.

Weight%, C: 0.003% or less, Si: 3.5% or less, Mn: 0.5% or less, P: 0.15% or less, S: 0.01% or less, N: 0.008% or less, Al: 0.7% or less, Ni: 0.02-1.0 %, Cu: 0.02-0.05%, the balance of non-oriented electrical steel sheet having a high permeability, characterized in that it is composed of the balance Fe and other unavoidable impurities.

Pulley process of hot rolling, pickling, single stage cold rolling or first stage cold rolling, two stage cold rolling followed by the second stage cold rolling, and then decarbonization of the inner rolled sheet, followed by final high temperature annealing In the method for producing a non-oriented electrical steel sheet by weight, the steel slab in weight%, C: 0.02% or less, Si: 3.5% or less, Mn: 0.5% or less, P: 0.15% or less, S: 0.01% or less , N: 0.008% or less, Al: 0.7% or less, Ni: 0.02-1.0%, Cu: 0.02-0.05%, balance Fe and other inevitable impurities, and decarbonized annealing of the cold rolled sheet is 750 High permeability, non-aromatic, characterized by an annealing temperature of -900 ° C, a mixed atmosphere of 60-90% nitrogen and 40-10% hydrogen, and 1-10 minutes at a dew point of 30-60 ° C. Electrical steel sheet manufacturing method.

The method of manufacturing a non-oriented electrical steel sheet having excellent permeability according to claim 3, wherein the hot rolled sheet after hot rolling is continuously annealed by a conventional method or subjected to annealing in a non-oxidizing atmosphere.

In the method of manufacturing a non-oriented electrical steel sheet by a semi-process of hot-rolled, pickled, primary cold rolling, intermediate annealing and light rolling, then processed by the demand, then stress relief annealing, the steel slab In weight%, C: 0.02% or less, Si: 3.5% or less, Mn: 0.5% or less, P: 0.15% or less, S: 0.01% or less, N: 0.008% or less, Al: 0.7% or less, Ni: 0.02 -1.0%, Cu: 0.02-0.05%, remainder Fe and other unavoidably contained impurities, and during the annealing of the cold rolled sheet, the cold rolled sheet is annealed at 750-900 ° C, 60-90% A high permeability non-oriented electrical steel sheet manufacturing method characterized by decarbonization annealing for 1-10 minutes at a mixed atmosphere of nitrogen and 40-10% hydrogen and a dew point of 30-60 ° C.

6. The stress relief annealing according to claim 5, wherein the demand is followed by annealing temperature of 750-850 ° C., a mixed atmosphere of 60-90% nitrogen and 40-10% hydrogen, and a dew point of 30-60 ° C. Method for producing an excellent permeability non-oriented electrical steel sheet, characterized in that the decarbonization in 1-10 minutes.

The method of manufacturing a non-oriented electrical steel sheet having excellent permeability according to claim 5 or 6, wherein the hot rolled sheet after hot rolling is continuously annealed in a conventional manner or subjected to ordinary annealing in a non-oxidizing atmosphere and then pickled.

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