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首页> 外文会议>International Conference on Manufacturing Engineering and Technology for Manufacturing Growth >Effect Of Applying Air Pressure on Gas Porosity In Lost Foam Casting Of Al-Si Alloy
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Effect Of Applying Air Pressure on Gas Porosity In Lost Foam Casting Of Al-Si Alloy

机译：对Al-Si合金丢失泡沫铸造气体孔隙率对气体孔隙率的影响

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The paper presents the result of investigation on aluminum-silicon (LM6) alloy cast using pressurized lost foam casting process. The study investigated the effect of pressure and sand size on porosity of the casting produced. Air pressure of 1, 2, 3 and 4 bars was applied on the solidifying alloy poured in mould of sand sizes 16-30, 40-60, 60-100 (AFS). The porosities of casting were measured using optical microscope which was equipped with image analyzer. For porosity of castings, all surfaces of solidified castings were captured by digital camera for better observation. The results show that applying pressure during solidification of the LM6 alloy has significant influence on casting porosity of the alloy. By increasing the applied pressure, the porosity percentage based on gas porosity decreased when pressure was applied. Consequently, the removal rate of gas porosity improved by increasing the sand size to finer size 60-100 (AFS), so there is less gas porosity in samples. Besides, rising air pressure lead to fulfilling of molten which improves the casting porosity.
机译：本文介绍了使用加压损失泡沫铸造工艺对铝 - 硅（LM6）合金的研究结果。该研究研究了压力和砂尺寸对所产生铸造孔隙率的影响。施加1,2,3和4巴的空气压力在浇筑的砂浆模具16-30,40-60,60-100（AFS）中浇注的凝固合金上。使用具有图像分析仪的光学显微镜测量铸件的孔隙率。对于铸件的孔隙率，通过数码相机捕获固化铸件的所有表面，以便更好地观察。结果表明，在LM6合金的凝固过程中施加压力对合金铸造孔隙率有显着影响。通过增加施加的压力，当施加压力时，基于气体孔隙率的孔隙率百分比降低。因此，通过将砂尺寸提高到更精细的60-100（AFS）来改善气体孔隙率的去除速率，因此样品中的气体孔隙较小。此外，空气压力上升导致熔融改善铸造孔隙率的熔融。

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