公开(公告)号：AU1782283A

公开(公告)日：1985-02-14

申请号：AU1782283

申请日：1983-08-09

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SALKELD RICHARD W ,  ANDERSON NEAL P ,  GIAMEI ANTHONY F

IPC: B22D27/04 ,  C30B11/14 ,  C30B21/02 ,  C30B11/02

Abstract: In the manufacture of a single crystal article, by the directional solidification of a metal in a ceramic mold the melt-back of a seed crystal is controlled to provide high casting yield. The melt-back, measured as a fraction of the original length of the seed, is preferably between 25-75%, more preferably between 33-67%. Diametrical clearance between the seed and mold is also closely controlled, between 0.06-0.25 mm, to eliminate extraneous grain nucleation.

公开(公告)号：CA1237964A

公开(公告)日：1988-06-14

申请号：CA455855

申请日：1984-06-05

Applicant: UNITED TECHNOLOGIES CORP

Inventor： FIELD THOMAS T ,  CHEN OTIS Y ,  GEARY ARTHUR R ,  SALKELD RICHARD W ,  ULION NICHOLAS E

IPC: C30B21/02 ,  C22C19/05 ,  C22F1/00 ,  C22F1/10 ,  C30B29/52 ,  C30B33/00

Abstract: Heat Treatment of Single Crystals Concepts relating to the heat treatment of single crystal superalloy articles are disclosed. A first concept is the use of a heat treatment sequence which includes incipient melting of the article being heat treated followed my one or more steps which essentially heal the incipient melting damage. A second concept relates to the treatment of previously heat treated single crystal articles which have incipient melting. Methods are disclosed for healing this damage and for recovering the mechanical properties of such articles. A third concept disclosed is a particular cycle which permits effective heat treatment of a specific single crystal alloy composition.

公开(公告)号：GB2144357B

公开(公告)日：1987-05-28

申请号：GB8321209

申请日：1983-08-05

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SALKELD RICHARD W ,  ANDERSON NEAL P ,  GIAMEI ANTHONY F

IPC: B22D27/04 ,  C30B11/14 ,  C30B21/02 ,  B22D27/20

Abstract: In the manufacture of a single crystal article, by the directional solidification of a metal in a ceramic mold the melt-back of a seed crystal is controlled to provide high casting yield. The melt-back, measured as a fraction of the original length of the seed, is preferably between 25-75%, more preferably between 33-67%. Diametrical clearance between the seed and mold is also closely controlled, between 0.06-0.25 mm, to eliminate extraneous grain nucleation.

公开(公告)号：GB2144357A

公开(公告)日：1985-03-06

申请号：GB8321209

申请日：1983-08-05

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SALKELD RICHARD W ,  ANDERSON NEAL P ,  GIAMEI ANTHONY F

IPC: B22D27/04 ,  C30B11/14 ,  C30B21/02 ,  B22D27/20

Abstract: In the manufacture of a single crystal article, by the directional solidification of a metal in a ceramic mold the melt-back of a seed crystal is controlled to provide high casting yield. The melt-back, measured as a fraction of the original length of the seed, is preferably between 25-75%, more preferably between 33-67%. Diametrical clearance between the seed and mold is also closely controlled, between 0.06-0.25 mm, to eliminate extraneous grain nucleation.

公开(公告)号：FR2550556A1

公开(公告)日：1985-02-15

申请号：FR8313072

申请日：1983-08-09

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SALKELD RICHARD W ,  ANDERSON NEAL P ,  GIAMEI ANTHONY F

IPC: B22D27/04 ,  C30B11/14 ,  C30B21/02 ,  C30B19/00

Abstract: In the manufacture of a single crystal article, by the directional solidification of a metal in a ceramic mold the melt-back of a seed crystal is controlled to provide high casting yield. The melt-back, measured as a fraction of the original length of the seed, is preferably between 25-75%, more preferably between 33-67%. Diametrical clearance between the seed and mold is also closely controlled, between 0.06-0.25 mm, to eliminate extraneous grain nucleation.

公开(公告)号：AU559152B2

公开(公告)日：1987-02-26

申请号：AU1782283

申请日：1983-08-09

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SALKELD RICHARD W ,  ANDERSON NEAL P ,  GIAMEI ANTHONY F

IPC: B22D27/04 ,  C30B11/14 ,  C30B21/02 ,  C30B11/02

Abstract: In the manufacture of a single crystal article, by the directional solidification of a metal in a ceramic mold the melt-back of a seed crystal is controlled to provide high casting yield. The melt-back, measured as a fraction of the original length of the seed, is preferably between 25-75%, more preferably between 33-67%. Diametrical clearance between the seed and mold is also closely controlled, between 0.06-0.25 mm, to eliminate extraneous grain nucleation.

公开(公告)号：CA1211341A

公开(公告)日：1986-09-16

申请号：CA435284

申请日：1983-08-24

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SALKELD RICHARD W ,  ANDERSON NEAL P ,  GIAMEI ANTHONY F

IPC: B22D27/04 ,  C30B11/14 ,  C30B21/02 ,  B22D25/00

Abstract: In the manufacture of a single crystal article, by the directional solidification of a metal in a ceramic mold the melt-back of a seed crystal is controlled to provide high casting yield. The melt-back, measured as a fraction of the original length of the seed, is preferably between 25-75%, more preferably between 33-67%. Diametrical clearance between the seed and mold is also closely controlled, between 0.06-0.25 mm, to eliminate extraneous grain nucleation.

公开(公告)号：DE3415282A1

公开(公告)日：1984-12-06

申请号：DE3415282

申请日：1984-04-24

Applicant: UNITED TECHNOLOGIES CORP

Inventor： FIELD THOMAS T ,  CHEN OTIS Y ,  GEARY ARTHUR R ,  SALKELD RICHARD W ,  ULION NICHOLAS E

IPC: C30B21/02 ,  C22C19/05 ,  C22F1/00 ,  C22F1/10 ,  C30B29/52 ,  C30B33/00

Abstract: Concepts relating to the heat treatment of single crystal superalloy articles are disclosed. A first concept is the use of a heat treatment sequence which includes incipient melting of the article being heat treated followed by one or more steps which essentially heal the incipient melting damage. A second concept relates to the treatment of previously heat treated single crystal articles which have incipient melting. Methods are disclosed for healing this damage and for recovering the mechanical properties of such articles. A third concept disclosed is a particular cycle which permits effective heat treatment of a specific single crystal alloy composition.

公开(公告)号：FR2550556B1

公开(公告)日：1990-08-17

申请号：FR8313072

申请日：1983-08-09

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SALKELD RICHARD W ,  ANDERSON NEAL P ,  GIAMEI ANTHONY F

IPC: B22D27/04 ,  C30B11/14 ,  C30B21/02 ,  C30B19/00

Abstract: In the manufacture of a single crystal article, by the directional solidification of a metal in a ceramic mold the melt-back of a seed crystal is controlled to provide high casting yield. The melt-back, measured as a fraction of the original length of the seed, is preferably between 25-75%, more preferably between 33-67%. Diametrical clearance between the seed and mold is also closely controlled, between 0.06-0.25 mm, to eliminate extraneous grain nucleation.

公开(公告)号：CA1212597A

公开(公告)日：1986-10-14

申请号：CA419723

申请日：1983-01-18

Applicant: UNITED TECHNOLOGIES CORP

Inventor： GIAMEI ANTHONY F ,  SALKELD RICHARD W ,  ANDERSON NEAL P

IPC: B22D27/04 ,  C30B11/00 ,  C30B11/14 ,  C30B21/02 ,  C30B29/52 ,  B22C9/00 ,  B22D25/00

Abstract: Disclosed is a method of epitaxially casting single crystal metal articles in molds, which comprises causing the solidification interface velocity vector to rotate through at least 90 degrees, preferably 180-540 degrees, about the axis of overall directional solidification growth. In addition, a mold section has a small passageway configured to prevent line of sight communication between the portion where the seed is contained and the article portion of the mold. Preferably, the passageway is shaped like a helix of 0.8-1.5 turns. A second seed can be formed in the mold of an article made from a first seed, and used to make a second casting. The invention reduces the normal increase in crystallographic variability which would otherwise be associated with such practice.