Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Manufacture of 7000 Al Alloy with Superior Extrudability and Its Extrusion Limit Diagram

압출성 향상을 위한 고강도 7000계 알루미늄 합금의 제조 및 압출한계선도

  • 함현욱 (삼림산업(주) 시스템 설계해석팀) ;
  • 김병민 (부산대학교 정밀정형 및 금형가공연구소) ;
  • 조훈 (한국생산기술원 주조공정 연구팀) ;
  • 조형호 (한국생산기술원 주조공정 연구팀)
  • Published : 1999.10.01
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Abstract

7000 series Al alloy with good mechanical properties has been focused with tendency to reduce the components weight of aircraft and automobile. However, it is difficult to manufacture a sound extruded product because of segregation, grain growth, casting defect, surface defect, decreasing extrudability and so on. The objective of this study is to manufacture a new 7000 al alloy more than the extrudability of A7N01 and A7003 through controlling the weight (%) Mg, Zn, Si. Hot extrusion experiments on the axisymmetric rod are performed in 500℃ and also performed analysis of the same process using unmerical analysis method, a coupled rigid-thermoviscoplastic finite element method. Extrusion limit diagram was obtained for the developed alloy by FE-simulation in order to define the relationship of extrusion speed and initial billet temperature.

Keywords

References

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