Abstract
The feature of nucleation in liquid metal excited by vibration was as follows: Large number of fine crystallites are formed on the surface of a vibrating and cooling bar inserted into liquid metal. The crystallites are ejected to molten metal continuously and served as nucleus of equiaxed grain during solidification. Physical simulation was carried out with 30% NH4Cl aqueous solution. The original position of nucleation in liquid metal excited by vibration was discussed. The results show that the crystallites are formed on the interface between crystal nucleus projector and NH4Cl aqueous solution. Vibration and cooling promote the formation of crystalline rain. The temperature of the crystal nucleus projector surface should be between the liquids and solids in order to make the crystalline nucleus leave and prevent growing up of solidified shell on the surface of crystal nucleus projector by controlling the vibration and cooling.
| Original language | English |
|---|---|
| Pages (from-to) | 20-24 |
| Number of pages | 5 |
| Journal | Kang T'ieh/Iron and Steel (Peking) |
| Volume | 43 |
| Issue number | 8 |
| State | Published - Aug 2008 |
Keywords
- Cooling
- Nucleation
- Solidification
- Vibration