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1. (WO2018029469) ADDITIVE MANUFACTURING APPARATUS AND PROCESS

Pub. No.:    WO/2018/029469    International Application No.:    PCT/GB2017/052346
Publication Date: Fri Feb 16 00:59:59 CET 2018 International Filing Date: Thu Aug 10 01:59:59 CEST 2017
IPC: B23K 9/04
B23K 10/02
B23K 26/342
B33Y 10/00
B33Y 30/00
B29C 64/20
B23K 35/28
Applicants: BAE SYSTEMS PLC
Inventors: PRICE, Howard, James
Title: ADDITIVE MANUFACTURING APPARATUS AND PROCESS
Abstract:
Additive manufacturing apparatus for fabricating a three-dimensional object, the apparatus comprising: means for directing energy onto a growth surface of a workpiece to form thereon a liquid melt-pool; means for feeding additional material into the melt-pool so as to cause the additional material to become incorporated into the liquid of the melt-pool; and means for cryogenically cooling the liquid melt-pool, thereby to achieve a cooling rate of the liquid melt pool of at least 100°C per second and to cause the liquid melt-pool to solidify.