한국주조공학회지 (Journal of Korea Foundry Society)

  • 제34권5호
  • /
  • Pages.162-169
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  • 2014
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  • 1598-706X(pISSN)
  • /
  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
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AC2B 알루미늄 주조합금의 응고균열 강도에 미치는 금형 예열온도의 영향

Effect of Mold Preheat Temperature on Solidification Crack Strength of AC2B Aluminum Alloy

  • 김헌주 (부경대학교 공과대학 금속공학과)
  • Kim, Heon-Joo (Dept. of Metallurgical Eng., Pukyong National Univ.)
  • 투고 : 2014.07.23
  • 심사 : 2014.10.17
  • 발행 : 2014.10.31
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초록

The effect of the mold preheat temperature on the solidification crack strength was investigated in AC2B aluminum alloy. A tension type apparatus as part of a solidification crack test which could measure the stress-strain relationship quantitatively was utilized. The evaluation of the solidification crack strength with varying mold preheat temperatures was performed by the test procedure established in this research. When the mold preheat temperatures were $250^{\circ}C$, $150^{\circ}C$ and $50^{\circ}C$, the solidification crack strengths were found to be $7.8Kgf/cm^2$, $12.9Kgf/cm^2$ and $28.6Kgf/cm^2$, respectively. In the same way, when the mold preheat temperatures were $250^{\circ}C$, $150^{\circ}C$ and $50^{\circ}C$, the corresponding temperatures of the failure sites were $610^{\circ}C$, $600^{\circ}C$ and $571^{\circ}C$, and the calculated solid fractions were 14.0%, 29.3% and 50.8% when the specimens failed, respectively. The solidification crack strength increased in proportion to the solid fraction of the failure site. The solidification crack strength obtained in this test is assumed to reflect the effects of metallurgical factors on the thermo-plastic characteristics of a solidifying alloy such as the grain size of the solid, the grain morphology, and the distribution of solid grain.

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피인용 문헌

  1. Effect of Scrap Content on the Hot Tearing Property and Tensile Property of AC2BS Alloy vol.36, pp.2, 2016, https://doi.org/10.7777/jkfs.2016.36.2.67
  2. AC4A 알루미늄 합금의 주조특성에 미치는 미량 첨가원소의 영향 vol.37, pp.5, 2017, https://doi.org/10.7777/jkfs.2017.37.5.148