Optimization of Titanium Alloy Injection Molding Process Parameters
GUO Shi-bo1, QU Xuan-hui1, DUAN Bo-hua2, HE Xin-bo1, QIN Ming-li1
1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China; 2. The Institution of PowderMetallurgy, Central South University, Changsha, 410083, China
Abstract：Effects of process parameters such as injection pressure, injection speed, injection temperature, die temperature and their interaction, on the density and strength of the as-molded specimens were systematically studied by using orthogonal arrays design and statistical analysis method. The notability of process parameters was estimated and process parameters were optimized. Results indicated that injection pressure, injection temperature and their interaction had remarkable effect on strength, however, injection pressure, injection temperature, injection speed and interaction of injection pressure and die temperature, had distinguished influence on density. The density and strength increased as injection pressure increased. The density decreased as injection temperature increased, but the strength nearly keep constant at 155-160℃,then decreased sharply beyond 160℃.The density and strength reached the best values when die temperature and injection speed are 30℃ and 60% respectively. The optimized injection parameters for rectangular with a dimension of 6.38mm × 6.38mm × 48mm are as followings: injection pressure 100MPa,injection temperature 155℃,injection speed 60% and die temperature 30℃.
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2004, Vol. 0 
