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Effect of Heat Treatment on the Mechanical Properties of Investment Casting Turbo Charger Wheel using A356 Alloy

A356합금을 이용한 정밀주조 Turbo Charger Wheel의 기계적 특성에 미치는 열처리의 영향

  • Kim, Sang-Mi (Division of Advanced Material Engineering & RCIT, Chonbuk National University) ;
  • Woo, Kee-Do (Division of Advanced Material Engineering & RCIT, Chonbuk National University) ;
  • Kim, Ji-Young (Division of Advanced Material Engineering & RCIT, Chonbuk National University) ;
  • Kim, Sang-Hyuk (Division of Advanced Material Engineering & RCIT, Chonbuk National University) ;
  • Park, Sang-Hoon (Division of Advanced Material Engineering & RCIT, Chonbuk National University) ;
  • Kang, Hwang-Jin (NiB Materials Co.) ;
  • Park, Chan-Sung (NiB Materials Co.)
  • 김상미 (전북대학교 공과대학 신소재공학부.공업기술연구센터) ;
  • 우기도 (전북대학교 공과대학 신소재공학부.공업기술연구센터) ;
  • 김지영 (전북대학교 공과대학 신소재공학부.공업기술연구센터) ;
  • 김상혁 (전북대학교 공과대학 신소재공학부.공업기술연구센터) ;
  • 박상훈 (전북대학교 공과대학 신소재공학부.공업기술연구센터) ;
  • 강황진 ((주)NIB) ;
  • 박찬성 ((주)NIB)
  • Received : 2011.08.03
  • Accepted : 2011.09.20
  • Published : 2011.10.31

Abstract

The aim of this study is to investigate aging behavior of A356 alloy for turbo charger part. The specimen was fabricated by investment casting. Solution heat treatment was performed at $525^{\circ}C$ for 8h and followed by aging treated at $160^{\circ}C$, $170^{\circ}C$ for 0.5~20h. And their microstructures and mechanical properties of the aged specimens were analyzed by scanning electron microscope and hardness tester, respectively. All the cast A356 alloy included eutectic Si particles. In the cast A356 alloy, eutectic Si phase mainly was formed along Chinese script phase. Vickers hardness of the cast was improved by aging treatment due to formation of ${\beta}$" phase and ${\beta}$' phase.

Keywords

References

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