It has been studied that the aluminum extrusion with the ingot-recycled composite billet that is casted. The billet is composed of the inner rod with the recycled and the outer ring with the ingot aluminum. For easy producing the tensile specimens to evaluate the bonding strength between recycled and ingot material, the extrusion die was designed. Two types of the billet are extruded. One is a composite billet that is casted. The other is an assembled billet with the turned bars. The strength is measured from tensile tests with extruded specimens. The effect on the strength of the oxidized layer between the materials has been researched with EDS analysis.

ABSTRACT
1. 서 론
2. 복합빌렛
    2.1 복합빌렛
    2.2 조립빌렛
3. 접합강도 평가
    3.1 압출 금형
    3.2 인장시편
4. 결 과
    4.1절 인장시험 결과
    4.2 접합면 산화층 분석
5. 결 론
References

• 원태연(Wonjin Aluminum, Ltd) | T. Y. Won
• 박찬곤(R&BD Division, CAMTIC) | C. G. Park
• 최영(Carbon & Light Materials Application R&D Group, KITECH) | Y. Choi
• 문상돈(Div. of Mech. Design Eng. Chonbuk National Univ.) | Sang-Done Moon Corresponding Author