| (19) |
 |
|
(11) |
EP 1 405 684 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
22.06.2005 Bulletin 2005/25 |
| (43) |
Date of publication A2: |
|
07.04.2004 Bulletin 2004/15 |
| (22) |
Date of filing: 17.04.2003 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
Designated Extension States: |
|
AL LT LV MK |
| (30) |
Priority: |
25.09.2002 KR 2002058163
16.10.2002 KR 2002063162
17.01.2003 KR 2003003250
04.03.2003 KR 2003013498
|
| (71) |
Applicant: Hong, Chunpyo |
|
Eunpyung-gu, Seoul (KR) |
|
| (72) |
Inventors: |
|
- Hong, Chunpyo
Eunpyung-gu, Seoul (KR)
- Kim, Jeamin
Llsan-gu, Goyang-city, Kyungki-do (KR)
- Kim, Minsoo
Dongjak-gu, Seoul (KR)
- Masayuki, Itamura
Yamaguchi-ken (JP)
|
| (74) |
Representative: Browne, Robin Forsythe, Dr. |
|
Urquhart-Dykes & Lord LLP Tower North Central Merrion Way
Leeds LS2 8PA
Leeds LS2 8PA (GB) |
|
| |
|
| (54) |
Metallic materials for rheocasting or thixoforming and method for manufacturing the
same |
(57) A method for manufacturing a metallic material for rheocasting or thixoforming and
a metallic material formed using the method are provided. The method includes: applying
an electromagnetic field to a vessel and loading a molten metal into the vessel; and
cooling the molten metal to form a metallic material for rheocasting or thixoforming.
The entire volume of molten metal is rapidly and uniformly cooled throughout, from
the wall toward the center of the vessel, without generating latent heat caused by
the formation of solidification layers at the early stage of cooling. The molten metal
in the vessel is cooled rapidly below its liquidus temperature within 1-10 seconds
after the loading of the molten metal into the vessel, so that numerous uniform crystal
nuclei are created throughout the entire volume of molten metal to form a metallic
material having uniform, micro, spherical particles.