| Title |
Research Paper - Solidification - : A Study on the Shape Control of Billet in Spray Forming Method |
| Authors |
석현광(Hyun Kwang Seok); 오규환(Kyu Hwan Oh); 신돈순(Don Su Shin); 이호인(Ho In Lee); 나형용(Hyung Yong Ra) |
| Abstract |
The shape variation of billet was investigated by numerical and experimental spray forming with various average substrate withdrawal velocity V￣, withdrawal velocity change interval △t and velocity deviation from average velocity V_(dev). The shape and diameter of billet which is manufactured at the condition of large V￣, △t, vary largely. When V￣, △t and V_(dev) are small, the shape of billet is similar to that of the billet with constant withdrawal velocity. The average diameter of billet is determined by V￣ independent of △t, V_(dev). With V￣ of 0.2 ㎜/sec, △t of 200 sec and V_(dev) of 0.2 ㎜/sec. billet of which diameter 230 ㎜ and height 1000 ㎜ was manufactured. |