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公开(公告)号：DE69316245T2
公开(公告)日：1998-07-23
申请号：DE69316245
申请日：1993-01-28
Applicant: HOWMET CORP , UNITED TECHNOLOGIES CORP
Inventor： CHIN STEPHEN , PARILLE DONALD R , AIMONE PAUL R , MCCORMICK ROBERT L , JOHNSON PAUL R , KILINSKI BART M
Abstract: The oxidation resistance of a superalloy casting such as an equiaxed, directionally solidified, or single crystal casting, is improved by melting, pouring, or casting the alloy so as to react with a magnesium or calcium-bearing ceramic material. Magnesium or calcium is introduced into the alloy through a controlled reaction between the alloy and the magnesium or calcium-bearing ceramic material.
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公开(公告)号：DE69316245D1
公开(公告)日：1998-02-19
申请号：DE69316245
申请日：1993-01-28
Applicant: HOWMET CORP , UNITED TECHNOLOGIES CORP
Inventor： CHIN STEPHEN , PARILLE DONALD R , AIMONE PAUL R , MCCORMICK ROBERT L , JOHNSON PAUL R , KILINSKI BART M
Abstract: The oxidation resistance of a superalloy casting such as an equiaxed, directionally solidified, or single crystal casting, is improved by melting, pouring, or casting the alloy so as to react with a magnesium or calcium-bearing ceramic material. Magnesium or calcium is introduced into the alloy through a controlled reaction between the alloy and the magnesium or calcium-bearing ceramic material.
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Patent Agency Ranking
公开(公告)号：DE69404455D1
公开(公告)日：1997-08-28
申请号：DE69404455
申请日：1994-04-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： ALLEN WILLIAM P , BORNSTEIN NORMAN S , CHIN STEPHEN , DECRESCENTE MICHAEL , DUHL DAVID N , PARILLE DONALD R , PIKE ROSCOE A , SMEGGIL JOHN G
Abstract: Superalloy articles are made more oxidation resistant by a process which includes heat treating the article in the presence of foreign chemical species, at a temperature at which the foreign chemical species reacts with and modifies any oxide film present on the article surface. The heat treatment is best carried out at a temperature above the gamma prime solvus temperature of the article and below the incipient melting temperature of the article. Alternatively, the heat treatment may be carried out within the range defined by the incipient melting temperature of the article and about 150 DEG C. below the incipient melting temperature of the article. At such temperatures the foreign chemical species reacts with and modifies the oxide film on the article surface. Sulfur is then able to diffuse through such modified film, and a more oxidation resistant component is produced.
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公开(公告)号：CA2083667A1
公开(公告)日：1993-07-31
申请号：CA2083667
申请日：1992-11-24
Applicant: HOWMET CORP , UNITED TECHNOLOGIES CORP
Inventor： CHIN STEPHEN , PARILLE DONALD R , AIMONE PAUL R , MCCORMICK ROBERT L , JOHNSON PAUL R , KILINSKI BART M
Abstract: OXIDATION RESISTANT SUPERALLOY CASTINGS The oxidation resistance of a superalloy casting such as an equiaxed, directionally solidified, or single crystal casting, is improved by melting, pouring, or casting the alloy so as to react with a magnesium or calcium-bearing ceramic material. Magnesium or calcium is introduced into the alloy through a controlled reaction between the alloy and the magnesium or calcium-bearing ceramic material.
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公开(公告)号：DE69404455T2
公开(公告)日：1998-02-26
申请号：DE69404455
申请日：1994-04-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： ALLEN WILLIAM P , BORNSTEIN NORMAN S , CHIN STEPHEN , DECRESCENTE MICHAEL , DUHL DAVID N , PARILLE DONALD R , PIKE ROSCOE A , SMEGGIL JOHN G
Abstract: Superalloy articles are made more oxidation resistant by a process which includes heat treating the article in the presence of foreign chemical species, at a temperature at which the foreign chemical species reacts with and modifies any oxide film present on the article surface. The heat treatment is best carried out at a temperature above the gamma prime solvus temperature of the article and below the incipient melting temperature of the article. Alternatively, the heat treatment may be carried out within the range defined by the incipient melting temperature of the article and about 150 DEG C. below the incipient melting temperature of the article. At such temperatures the foreign chemical species reacts with and modifies the oxide film on the article surface. Sulfur is then able to diffuse through such modified film, and a more oxidation resistant component is produced.
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公开(公告)号：DE69403474T2
公开(公告)日：1998-01-02
申请号：DE69403474
申请日：1994-03-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： ALLEN WILLIAM P , PARILLE DONALD R
Abstract: Superalloy articles are made more oxidation resistant by a process which includes heating the article in an environment having a reduced pressure of inert gas and a low partial pressure of oxygen to a temperature at which the sulfur in the article diffuses out. The heat treatment is best carried out at a temperature within the range defined by the incipient melting temperature of the article and about 150 DEG C. below the incipient melting temperature of the article. Alternatively, the heat treatment may be carried out at a temperature above the gamma prime solvus temperature of the article and below the incipient melting temperature of the article. At such temperatures, sulfur readily diffuses out of the article, and a more oxidation resistant component is produced.
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公开(公告)号：DE69403474D1
公开(公告)日：1997-07-03
申请号：DE69403474
申请日：1994-03-14
Applicant: UNITED TECHNOLOGIES CORP
Inventor： ALLEN WILLIAM P , PARILLE DONALD R
Abstract: Superalloy articles are made more oxidation resistant by a process which includes heating the article in an environment having a reduced pressure of inert gas and a low partial pressure of oxygen to a temperature at which the sulfur in the article diffuses out. The heat treatment is best carried out at a temperature within the range defined by the incipient melting temperature of the article and about 150 DEG C. below the incipient melting temperature of the article. Alternatively, the heat treatment may be carried out at a temperature above the gamma prime solvus temperature of the article and below the incipient melting temperature of the article. At such temperatures, sulfur readily diffuses out of the article, and a more oxidation resistant component is produced.
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