Study on the Composition and Properties of Salt Cores for Zinc Alloy Die Casting

International Journal of Metalcasting volume 11, pages440–447 (2017)Cite this article

Abstract

Soluble salt cores have been successfully used for the die casting of aluminum and magnesium alloys. However, it has not been reported that the soluble salt cores were used for zinc alloy die casting. In this paper, a soluble salt core system of low melting salt A–potassium chloride-reinforcing particles was put forward for zinc alloy die casting in the sanitary industry. Reinforcing particles included layered material B, acicular material C and alpha-Al2O3 (α-Al2O3). The salt core system and the mixtures of salts and reinforcing particles were analyzed by scanning electron microscopy, differential thermal analysis, thermogravimetric analysis and X-ray diffraction. In addition, the “triplet” salt cores prepared by high pressure core-making were used for zinc alloy high pressure die casting (HPDC). “Triplet” articles were washed, dried, pretreated, electroplated and detected according to the die casting industry standards. The salt core system could be recycled and had no corrosion to casting articles. It was observed that the zinc alloy articles basically met the technical requirements of zinc alloy castings. In conclusion, the salt core system was suitable for a certain shape of zinc alloy castings by HPDC.

아연 합금 다이캐스팅용 솔트코어의 조성 및 특성에 관한 연구

가용성 솔트 코어는 알루미늄 및 마그네슘 합금의 다이캐스팅에 성공적으로 사용되었습니다. 그러나 용해성 솔트코어를 아연 합금 다이캐스팅에 사용한 것으로 보고된 바는 없습니다. 이 논문에서는 저융점 염 A-염화칼륨 강화 입자의 용해성 솔트 코어 시스템이 위생 산업에서 아연 합금 다이캐스팅을 위해 제시되었습니다.

강화 입자에는 층상 물질 B, 침상 물질 C 및 알파-Al2O3(α-Al2O3)가 포함됩니다. 염핵계와 염류와 강화입자의 혼합물은 주사전자현미경, 시차열분석, 열중량분석, X선 회절법으로 분석하였습니다. 또한 고압 코어 메이킹으로 제조된 "삼중항" 솔트 코어는 아연 합금 고압 다이캐스팅(HPDC)에 사용되었습니다. "삼중항" 제품은 다이캐스팅 산업 표준에 따라 세척, 건조, 전처리, 전기도금 및 검출되었습니다. 솔트코어 시스템은 재활용될 수 있으며 주조품에 부식이 없습니다. 아연 합금 제품은 기본적으로 아연 합금 주조의 기술 요구 사항을 충족하는 것으로 관찰되었습니다.

결론적으로 솔트코어 시스템은 HPDC의 아연 합금 주조물의 특정 형상에 적합하였습니다.

Keywords

  • soluble salt core
  • zinc alloy
  • high pressure die casting (HPDC)
Figure 1. Photographs of ‘‘triplet’’ salt core and ‘‘triplet’’ die casting blank.
Figure 1. Photographs of ‘‘triplet’’ salt core and ‘‘triplet’’ die casting blank.
Figure 4. DSC heating and cooling curves of salt cores.
Figure 4. DSC heating and cooling curves of salt cores.
Figure 5. XRD curves of different compositions.
Figure 5. XRD curves of different compositions.
Figure 6. Thermogravimetric analysis of mixed salts.
Figure 6. Thermogravimetric analysis of mixed salts.

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