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Formation of cube-on-face texture in non-oriented electrical steel : 무방향성 전기강판에서의 cube-on-face 집합조직 형성에 관한 연구
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 황농문 | - |
dc.contributor.author | 권수빈 | - |
dc.date.accessioned | 2018-05-28T16:15:01Z | - |
dc.date.available | 2018-05-28T16:15:01Z | - |
dc.date.issued | 2018-02 | - |
dc.identifier.other | 000000150060 | - |
dc.identifier.uri | https://hdl.handle.net/10371/140623 | - |
dc.description | 학위논문 (박사)-- 서울대학교 대학원 : 공과대학 재료공학부, 2018. 2. 황농문. | - |
dc.description.abstract | Electric steel sheets using the magnetic properties of iron are divided into a grain oriented electric steel sheet and a non-oriented electric steel sheet. In the case of non-oriented electrical steel, it is generally used inside a rotating motor or generator. There is a growing interest in the efficiency of electric vehicles and generators, and there is a growing demand for the production of highly efficient, non-oriented electrical steel sheets in the future. The composition, microstructure and texture must be controlled to produce high-efficiency non-oriented electrical steel sheet. Control of composition and microstructure have already been made much progress. But it has not yet reached the control of texture.
Cube-on-face texture is known as the ideal texture for non-oriented electrical steel. However, the cube-on-face texture is not yet available. In this study, we clarified the mechanism for formation of cube-on-face texture and found the necessary conditions for obtaining cube-on-face texture in high Si steel. In the γ → α phase transformation, the stress was applied to the specimen to confirm the formation of cube-on-face texture. Based on these results, we succeeded in forming a large-area cube-on-face texture. In addition, the cube-on-face texture could be formed through various methods using the weight of the specimen. During the γ → α phase transformation, the nucleation sites could be controlled to form the surface nucleation, which enabled the formation of cube-on-face textures from 1% Si-steel to 2% Si-steel. | - |
dc.description.tableofcontents | 1. Introduction 1
1.1 Electrical steel 1 1.2 Non-oriented electrical steel & Cube-on-face texture 7 2. Effect of stress on formation of cube-on-face texture in γ α phase transformation 10 2.1 Introduction 10 2.2 Experimental details 13 2.3 Results & Discussions 15 3. Process of cube-on-face texture large sheet using tile 26 3.1 Effect of big size tile on formation of cube-on-face texture in large size sheet 26 3.2 Effect of a number of small size tiles on formation of cube-on-face texture in large size sheet 32 4. Effect of uniaxial stress on cube-on-face texture formation 34 4.1 Introduction 34 4.2 Formation of cube-on-face texture by self-weight hanging 36 4.3 Formation of cube-on-face texture by U-type holder 41 5. Cube-on-face texture steel production with high Si content and impurities 49 5.1 Introduction 49 5.2 Formation of cube-on-face texture with impurities 51 5.3 Formation of cube-on-face texture with high Si content 61 6. Magnetic properties measurement 75 6.1 Introduction 75 6.2 Magnetic properties comparison with commercial steel 75 7. Discussion and conclusion 80 Abstract 91 | - |
dc.format | application/pdf | - |
dc.format.extent | 2061451 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | Non-oriented electrical steel | - |
dc.subject | Magnetic property | - |
dc.subject | Texture control | - |
dc.subject | Phase transformation | - |
dc.subject | Cube-on-face texture | - |
dc.subject.ddc | 620.1 | - |
dc.title | Formation of cube-on-face texture in non-oriented electrical steel | - |
dc.title.alternative | 무방향성 전기강판에서의 cube-on-face 집합조직 형성에 관한 연구 | - |
dc.type | Thesis | - |
dc.contributor.AlternativeAuthor | Kwon soo bin | - |
dc.description.degree | Doctor | - |
dc.contributor.affiliation | 공과대학 재료공학부 | - |
dc.date.awarded | 2018-02 | - |
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