公开(公告)号：EP2969314A1

公开(公告)日：2016-01-20

申请号：EP14767376.8

申请日：2014-03-11

申请人： United Technologies Corporation

发明人： ASTERLIN, Max ,  BEATTIE, Jeffrey S. ,  GUNN, John R.

IPC分类号： B22D19/08 ,  B22D17/20 ,  B22D17/00 ,  B22D15/00

CPC分类号： B22D15/00 ,  B22C9/10 ,  B22D25/02 ,  B22D27/04 ,  B22D27/045 ,  C30B11/00 ,  C30B29/52 ,  F01D5/18 ,  F01D5/187 ,  F01D5/282 ,  F01D9/041 ,  F02C3/04 ,  F05D2220/30 ,  F05D2230/21 ,  F05D2230/211 ,  F05D2260/20 ,  F05D2260/204 ,  F05D2300/607 ,  F05D2300/608 ,  Y02T50/676

摘要： A cast component includes a cast body that has a single crystal microstructure and an internal corner bounding an internal cavity. The single crystal microstructure defines a critical internal residual stress with respect to investment casting of the cast body using a refractory metal core beyond which the single crystal microstructure recrystallizes under a predetermined condition. The internal corner has a corner radius that is greater than a critical corner radius below which an amount of internal residual stress in the single crystal microstructure exceeds the critical internal residual stress. The internal cavity includes a cross section less than about 20 mils near the corner radius.