公开(公告)号：US20160001356A1

公开(公告)日：2016-01-07

申请号：US14769803

申请日：2014-03-11

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： Max Asterlin ,  Jeffrey S. Beattie ,  John R. Gunn

IPC: B22D15/00 ,  F01D5/28 ,  B22D27/04 ,  F01D9/04 ,  B22D25/02 ,  F02C3/04 ,  F01D5/18

CPC classification number: 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

Abstract: 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.

Abstract translation: 铸造组件包括具有单晶微结构的铸造体和包围内腔的内角。 单晶微结构定义了使用难熔金属芯相对于铸造体的熔模铸造的关键内部残余应力，超临界内的单晶微结构在预定条件下重结晶。 内角具有大于临界角半径的角半径，低于该半径时，单晶微结构中的内部残余应力的量超过临界内部残余应力。 内腔包括在拐角半径附近小于约20密耳的横截面。

公开(公告)号：US10226814B2

公开(公告)日：2019-03-12

申请号：US14769803

申请日：2014-03-11

Applicant: United Technologies Corporation

Inventor： Max Asterlin ,  Jeffrey S. Beattie ,  John R. Gunn

IPC: B22D15/00 ,  B22D27/04 ,  B22C9/10 ,  C30B29/52 ,  B22D25/02 ,  F01D5/18 ,  F01D9/04 ,  C30B11/00 ,  F01D5/28 ,  F02C3/04

Abstract: 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.