Design & Manufacturing

  • 제17권4호
  • /
  • Pages.63-71
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  • 2023
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  • 2800-0323(pISSN)
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  • 2733-452X(eISSN)
한국금형공학회 (Korean Society of Die & Mold Engineering)
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금형 냉각이 Al-Mn계 다중압출 평판관의 압출 특성 변화에 미치는 영향

Effects of die cooling on change of extrusion characteristics of Al-Mn-based thin-walled flat multi-port tube

  • 신영철 (한국생산기술연구원 뿌리기술연구소) ;
  • 하성호 (한국생산기술연구원 뿌리기술연구소) ;
  • 강태훈 (인하대학교 신소재공학과) ;
  • 이기안 (인하대학교 신소재공학과) ;
  • 이승철 (대한공조(주))
  • Young-Chul Shin (Korea Institute of Industrial Technology, Research Institute of Advanced Manufacturing & Materials Technology) ;
  • Seong-Ho Ha (Korea Institute of Industrial Technology, Research Institute of Advanced Manufacturing & Materials Technology) ;
  • Tae-Hoon Kang (Department of Materials Science and Engineering, INHA University) ;
  • Kee-Ahn Lee (Department of Materials Science and Engineering, INHA University) ;
  • Seung-Chul Lee (DAIHAN, Climate Control Co., LTD)
  • 투고 : 2023.11.24
  • 심사 : 2023.12.31
  • 발행 : 2023.12.31
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초록

In order to increase the extrusion production speed of aluminum, extrusion die cooling technology using liquid nitrogen has recently attracted a lot of attention. Increasing the extrusion speed increases the temperature of the bearing area of extrusion dies and the extrusion profile, which may cause defects on the surface of extruded profile. Extrusion die cooling technology is to directly inject liquid nitrogen through a cooling channel formed between the die and the backer inside the die-set. The liquid nitrogen removes heat from the die-set, and gaseous nitrogen at the exit of the channel, covers the extrusion profile of an inert atmosphere reducing the oxidation and the profile temperature. The aim of this study is to evaluate the cooling capacity by applying die cooling to extrusion of Al-Mn-based aluminum alloy flat tubes, and to investigate the effects of die cooling on the change in extrusion characteristics of flat tubes. Cooling capacity was confirmed by observing the temperature change of the extrusion profile depending on whether or not die cooling is applied. To observe changes in material characteristics due to die cooling, surface observation is conducted and microstructure and precipitate analysis are performed by FE-SEM on the surface and longitudinal cross section of the extruded flat tubes.

키워드

과제정보

본 논문은 중소벤처기업부 구매조건부신제품개발사업 "전기차 콘덴서용 마이크로 튜브 압출을 위한 고내마모성 장수명 압출 금형 개발 (S3374662)"의 지원으로 수행한 연구입니다.

참고문헌

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