公开(公告)号：SG116594A1

公开(公告)日：2005-11-28

申请号：SG200502024

申请日：2005-04-05

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SNYDER JACOB A ,  BEALS JAMES T ,  PERSKY JOSHUA E ,  VERNER CARL R ,  KENNARD LEA D ,  MANDICH DAWN D ,  MURRAY STEPHEN D

IPC: B22C9/04 ,  B22C9/10 ,  B22C9/12 ,  B22C13/08

Abstract: An at least two step heating process is used to strengthen the shell of an investment casting mold including a refractory metal core. The first stage (46) may occur under otherwise oxidizing conditions at a low enough temperature to avoid substantial core oxidation. The second stage (56) may occur under essentially non-oxidizing conditions at a higher temperature.

公开(公告)号：CA2486052A1

公开(公告)日：2005-06-19

申请号：CA2486052

申请日：2004-10-26

Applicant: UNITED TECHNOLOGIES CORP

Inventor： DUBE BRYAN P ,  TURKINGTON MICHAEL K ,  SPANGLER BRANDON W ,  BEALS JAMES T ,  DRAPER SAMUEL D ,  MURRAY STEPHEN D ,  SNYDER JACOB A ,  SANTELER KEITH A ,  LOPES JOSE A

IPC: F01D25/00 ,  B22C7/02 ,  B22C9/04 ,  B22C9/10 ,  B22C9/22 ,  B22C9/24 ,  F02C7/00

Abstract: A sacrificial core for forming an interior space of a part includes a cerami c core element and a first core element including a refractory metal element. The ceramic core element may be molded over the first core element or molded with assembly features permitting assembly with the first core element.