公开(公告)号：CA1093268A

公开(公告)日：1981-01-13

申请号：CA265018

申请日：1976-11-05

Applicant: UNITED TECHNOLOGIES CORP

Inventor： LOERSCH JOSEPH F ,  HURWITZ PETER A ,  JORDAN LESTER W

IPC: B22F3/12 ,  B22F3/15 ,  B22F5/04 ,  B22F3/04

Abstract: This invention involves a method for the hoe isostatic compaction of particulate material into an article of intricate configuration. It comprises providing a removable pattern in the appropriate precompaction configuration of the article to be produced, coating the pattern with a first layer of conductive material and a second layer of metallic material, the two layers cooperating to provide a self-supporting and gas-impervious shell around the pattern and removing the pattern from the shell to provide a self-supporting and gas-impervious container having an internal configuration corresponding to the precompaction shape of the article to be produced. The container is then filled with particulate material, evacuated ant sealed, and isostatically compacted in a pressure vessel at elevated temperature until the particulate material is compacted into a dense article of complex shape. The container is thereafter removed to obtain the compacted article. Dense articles of complex shape, such as gas turbine engine components including blades, discs and the like, are readily produced by the method of the invention.

公开(公告)号：CA1057485A

公开(公告)日：1979-07-03

申请号：CA267222

申请日：1976-12-06

Applicant: UNITED TECHNOLOGIES CORP

Inventor： LOERSCH JOSEPH F ,  HURWITZ PETER A ,  JORDAN LESTER W

IPC: F01D5/28 ,  B22F3/12 ,  B22F3/14 ,  B22F3/15 ,  B30B11/00 ,  B22F7/04

Abstract: This invention involves a method of making a gasimpervious container for the hot isostatic compaction of particulate material into an article of intricate configuration. It comprises providing a removable pattern in the appropriate precompaction configuration of the article to be produced, forming a shell of vitreous frit on the pattern, heating the shell to effect vitrification thereof, and coating the vitreous shell with a layer of metallic material to form a gas-impervious metallic shell around the vitreous shell. The pattern may be removed at any time after formation of the shell of vitreous frit. The gas-impervious container thus produced is well-suited for use in hot isostatic compaction processes wherein dense articles of complex shape, such as gas turbine engine components, are produced from superalloy powders.