Effect of processing parameters and fluxing treatment on the quality of Al-Si and A356 alloys

• Main Authors: Kung-Yao Wen, 溫宮瑤
• Other Authors: Teng-Shih Shih
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/91780310620095040079

碩士 === 國立中央大學 === 機械工程研究所 === 91 === Abstract The purpose of this study is aimed at investigating effect of pore count and foggy mark area in different aluminum melts after degassing and fluxing treatment. The alloys used in this study are A356.2 alloys, Al-7Si alloys and continuous cast A356.2 alloys. Use lance for degassing treatment. Cover fluxes are mixture of KCl and NaCl, which at 44% and 56%. After fluxing treatment, analysis the type and morphologies of slag by the X-ray powder diffraction spectroscopy. Experimental results indicated that degassing treatment by lance resulted in decreasing pore count and foggy mark area in the melts. Adding cover flux would increase pore count and decrease foggy mark area. The slag was also observed and detected after fluxing treatment. The wet-type dross was found in fluxing melts with KCl and NaCl. Eventually, fatigue life would decrease, if the pore count and size of inclusion in alloys increase.