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논문 기본 정보

자료유형
학위논문
저자정보

성동현 (부경대학교, 부경대학교 대학원)

지도교수
김헌주
발행연도
2019
저작권
부경대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (2)

초록· 키워드

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The effect of additives on the castability of the the AC2BS aluminum alloy, which contains 35% recycled scrap, was investigated. For the wide utilization of the recycled scrap AC2BS aluminum alloy, the research results were compared to those with the AC2B virgin alloy, which is typical Al-Si-Cu alloy system. It was confirmed that the addition of Al-5%Ti-1%B increased the α-Al nucleation temperature during solidification and decreased the grain size through cooling curve and microstructural observations of the recycled alloy. It was also found that an addition of Al-10%Sr decreased the eutectic Si growth temperature during the solidification process and modified the shape of the eutectic Si of the recycled alloy. The characteristics of fluidity, shrinkage and solidification crack strength were evaluated. For the AC2BS aluminum alloy containing 35% recycled scrap, both α-Al grain refinement due to Ti-B and eutectic Si modifications due to Sr contributed to the improvement of the fluidity. The macro-shrinkage ratio increased with additions of both Al-10%Sr and Al-5%Ti-1%B and the micro- shrinkage ratio increased with the addition of Al-10%Sr but decreased with the addition of Al-5%Ti-1%B. The casting characteristics of TiB and Sr-treated AC2BS aluminum alloy containing 35% recycled scrap are similar to those of AC2B virgin alloy. The improvement of the solidification crack strength of the AC2BS aluminum alloy was possible by the reduction of the grain boundary the stress concentration through the enhancement by both α-Al refinement and eutectic Si modification. More extensive use of the AC2BS aluminum alloy containing 35% recycled scrap can be expected in the future.

목차

1. 서 론 1
2. 이론적 배경 3
2.1 결정립 미세화 3
2.2 공정 개량화 8
2.3 알루미늄 합금의 주조성 12
3. 실험방법 20
3.1 시료제작 20
3.2 열분석 및 미세조직 관찰 22
3.3 주조성 평가 23
4. 결과 및 고찰 29
4.1 열분석 및 미세조직 관찰 29
4.2 주조성 평가 36
5. 결 론 46
참고문헌 47

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