목차

Ⅰ 서 론 ····································································1
1.1. 연구 배경·······························································1
1.2. 최근 연구 동향 ······················································ 3
1.2.1 해외기술동향 ······················································ 3
1.2.2 국내기술동향 ······················································ 4
1.3. 연구목적 및 내용 ··················································· 5
Ⅱ 이론적 배경 ··························································· 6
2.1. 플럭스충진와이어 용접일반 ······································· 6
2.1.1 플럭스충진와이어 용접의 원리 ································· 6
2.1.2 플럭스충진와이어 제조공정 ····································· 8
2.1.3 플럭스충진와이어 용접부 특성 ································· 9
2.2. 플럭스 충진와이어 용접부 조직··································· 11
2.2.1 플럭스충진와이어 용접조직의 형성···························11
2.2.2 용접부의 비금속 개재물의 역할······························ 14
2.2.3 침상형페라이트의 형성과 비금속개재물··················· 17
2.2.4. CTOD 특성························································ 19
2.2.5. 플럭스 충전 와이어 제조 변수······························ 21
Ⅲ 실 험 방 법 ························································· 23
3.1. 실험재료 제작 ····················································· 23
3.2. 용접 및 시험편 제작 ············································· 25
3.3. 용접부 특성평가··················································· 28
3.3.1. 용접부 화학성분················································ 28
3.3.2. 용접부 조직관찰················································ 28
3.3.3. 경도 시험························································ 29
3.3.4. 기계적 성능 시험·············································· 29
3.3.5. CTOD 시험 ···················································· 31
Ⅳ 실험결과 및 고찰 ··················································· 34
4.1. 용접부의 화학성분 ··············································· 34
4.2. 용접부의 경도·······················································35
4.3. 용접부의 기계적 성능············································· 37
4.4. 용접부의 미세조직················································· 39
4.5. 용접부 CTOD ····················································· 43
Ⅴ. 결 론 ······························································· 58
참 고 문 헌 ···························································· 60
초 록 ··································································· 62
감사의 글 ································································ 63