Super_TIG 용접의 3D 금속 프린팅에 미치는 용접조건의 영향
- Alternative Title
- Effect of welding parameters on 3D metal printing of Super_TIG welding
- Abstract
- Recently, the patent related with 3D printing expires, there have been active researches and developments on it. Among them, 3D metal printing mainly applies layering by laser and powder or by electron beam and wire on precision metal products. And, for relatively smaller metal products, layering process by GTAW, GMAW, and wire is applied. In the thin wire-adding GTAW, welding speed is 0.72kg/hr, slow because molted metal flows down on the wall. But, layering with Super_TIG welding which combines TIG welding and C-stream, used in this research, increases the welding speed to 9kg/hr due to the characteristics of C-stream which accepts plasma stream well, making it possible to apply 3D metal printing to large cast steel products.
This research is on 3D metal printing layering process, aiming to develop a process in which high welding speed allows maintaining vertical angle for the wall.
When layering was done with 20 layers 30mm thick at 9kg/hr speed, it was possible to get sound weld block without defects such as lack of fusion, blow hole, and bead flow-down, etc. Thus, it can be applied to large metal products.
- Issued Date
- 2015
- Awarded Date
- 2015. 2
- Type
- Dissertation
- Publisher
- 부경대학교
- Alternative Author(s)
- Son, Min Su
- Affiliation
- 부경대학교 대학원 신소재시스템공학과
- Department
- 대학원 신소재시스템공학과
- Advisor
- 조상명
- Table Of Contents
- 목 차
Abstract ······························································································ ⅲ
제 1 장 서 론 ························································································ 1
1.1 연구 배경 및 필요성 ······································································· 1
1.2 연구 목적 및 개요 ·········································································· 2
제 2 장 이론적 배경 ··············································································· 3
2.1 3D 금속 프린팅··············································································· 3
2.1.1 Laser sintering process ··························································· 4
2.1.2 Laser melting process ····························································· 5
2.1.3 Laser metal deposition process ·············································· 6
2.1.4 Laser wire-feed process ························································· 7
2.1.5 Electron beam wire-feed process ············································ 8
2.1.6 Arc wire-feed process ···························································· 9
2.2 Conventional TIG용접 ······························································· 10
2.3 Super_TIG용접 ··········································································· 12
2.3.1 Super_TIG용접의 정의 ······························································ 12
2.3.2 플라즈마 스트림 이론에 의한 용가재 형상 ··································· 12
2.4 로컬 비드······················································································ 15
2.4.1 로컬 비드의 정의······································································· 15
2.4.2 로컬 비드의 형성 원인 ······························································ 16
2.4.3 로컬 비드 입열량 ······································································ 16
2.5 퍼짐비(SR)의 정의 ······································································· 18
2.6 전류비(CR)의 정의········································································· 19
제 3 장 Conventional TIG용접에 의한 적층 실험 ································· 20
3.1 전류비 변경 Bead on plate(BOP) 실험 ············································· 20
3.1.1 실험 재료··················································································· 20
3.1.2 실험 방법··················································································· 21
3.1.3 실험결과 및 고찰 ····································································· 22
3.2 전류비 변경 적층 실험 ··································································· 23
3.2.1 실험 방법 ················································································· 23
3.2.2 실험결과 및 고찰 ······································································ 24
제 4 장 Super_TIG용접에 의한 적층 실험 ············································ 27
4.1 Ar+30%He 혼합가스 실험 ····························································· 27
4.1.1 실험 재료 ················································································ 27
4.1.2 실험 방법 ················································································ 28
4.1.3 실험 결과 및 고찰 ···································································· 29
4.2 비드폭 감소와 layer당 용착단면적 감소 실험 ··································· 31
4.2.1 실험방법 ·················································································· 31
4.2.2 실험 결과 및 고찰 ····································································· 32
4.3 Dwell time 0.2sec 10layer 적층실험 ············································ 33
4.3.1 실험방법 ·················································································· 33
4.3.2 실험 결과 및 고찰 ···································································· 34
4.4 Dwell time 0.2sec 20layer 적층실험 ············································ 35
4.4.1 실험방법 ··················································································· 35
4.4.2 실험 결과 및 고찰 ···································································· 36
제 5 장 결론 ······················································································· 40
참고문헌 ······························································································ 41
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