Application of CAE in Aluminum Alloy Tilt Gravity Casting

• Main Authors: LIN,GUAN-YI, 林冠億
• Other Authors: YANG,RONG-SHEAN
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/h89y4x

碩士 === 逢甲大學 === 機械與電腦輔助工程學系 === 106 === The objective of this research is to evaluate the effectiveness of gating design and misrun problem caused by back pressure of the A356 aluminum alloy tilt gravity casting vent using the foundry CAE software, ProCAST. The metallographic microstructure and hardness variation of A356 aluminum alloy casting through melt treatment to heat treatment are also evaluated. The simulation result shown that unpressurized gating system with gating ratio of “1:1.7:3.52” has a lower flow speed than “1:1.7:1.13”. Flow speed decreased about 18%. The molten aluminum flow gets steady when pouring. The simulation result is in good agreement with the actual result when “back pressure” is included in the simulation. The simulation showed that increasing vent area will help to solve the misrun problem. The correction value of “back pressure” is 0.067atm in this simulation result. The metallographic microstructure results of the casting at each process shown that ingot has a partial effect of modification and refinement when contenting 0.025% Sr and 0.025% Ti. After modification treatment and refinement treatment, the refinement effect of eutectic silicon and grain size were increased. The hardness of casting had a great promote after T4 heat-treatment and T6 heat-treatment. The CAE simulation method saved 63% of time and 40% of cost when compared with the tradition “Trail-and-Error” method.