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公开(公告)号：HK1063823A1
公开(公告)日：2005-01-14
申请号：HK04106552
申请日：2004-08-31
Applicant: ATI PROPERTIES INC
Inventor： GRUBB JOHN F , FRITZ JAMES D
IPC: C22B9/16 , C21D20090101 , C21D1/09 , C21D1/26 , C21D1/34 , C21D6/00 , C21D8/00 , C22B9/18 , C22B9/20 , C22B9/22 , C22C20090101 , C22C38/00 , C22C38/44 , C22C38/58 , F28F21/08
Abstract: A method for producing a stainless steel with improved corrosion resistance includes homogenizing at least a portion of an article of a stainless steel including chromium, nickel, and molybdenum and having a PREN of at least 50, as calculated by the equation:where Cr is weight percent chromium, Mo is weight percent molybdenum, and N is weight percent nitrogen in the steel. In one form of the method, at least a portion of the article is remelted to homogenize the portion. In another form of the method, the article is annealed under conditions sufficient to homogenize at least a surface region of the article. The method of the invention enhances corrosion resistance of the stainless steel as reflected by the steel's critical crevice corrosion temperature.
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公开(公告)号：NO20034714L
公开(公告)日：2003-12-22
申请号：NO20034714
申请日：2003-10-21
Applicant: ATI PROPERTIES INC
Inventor： GRUBB JOHN F , FRITZ JAMES D
IPC: C22B9/16 , C21D1/09 , C21D1/26 , C21D1/34 , C21D6/00 , C21D8/00 , C22B9/18 , C22B9/20 , C22B9/22 , C22C38/00 , C22C38/44 , C22C38/58 , F28F21/08
Abstract: A method for producing a stainless steel with improved corrosion resistance includes homogenizing at least a portion of an article of a stainless steel including chromium, nickel, and molybdenum and having a PREN of at least 50, as calculated by the equation:where Cr is weight percent chromium, Mo is weight percent molybdenum, and N is weight percent nitrogen in the steel. In one form of the method, at least a portion of the article is remelted to homogenize the portion. In another form of the method, the article is annealed under conditions sufficient to homogenize at least a surface region of the article. The method of the invention enhances corrosion resistance of the stainless steel as reflected by the steel's critical crevice corrosion temperature.
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公开(公告)号：ZA200209034B
公开(公告)日：2003-08-28
申请号：ZA200209034
申请日：2002-11-06
Applicant: ATI PROPERTIES INC
Inventor： GRUBB JOHN F , POLINSKI RONALD E , FRITZ JAMES D
Abstract: A method of enhancing the corrosion resistance of an austenitic steel includes removing material from at least a portion of a surface of the steel such that corrosion initiation sites are eliminated or are reduced in number relative to the number resulting from processing in a conventional manner. Material may be removed from the portion by any suitable method, including, for example, grit blasting, grinding and/or acid pickling under conditions more aggressive than those used in conventional processing of the same steel.
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公开(公告)号：CA2443545A1
公开(公告)日：2002-10-31
申请号：CA2443545
申请日：2002-04-18
Applicant: ATI PROPERTIES INC
Inventor： FRITZ JAMES D , GRUBB JOHN F
IPC: C22B9/16 , C21D1/09 , C21D1/26 , C21D1/34 , C21D6/00 , C21D8/00 , C22B9/18 , C22B9/20 , C22B9/22 , C22C38/00 , C22C38/44 , C22C38/58 , F28F21/08 , C22C28/00 , C21D9/00 , C22C19/05
Abstract: A method for producing a stainless steel with improved corrosion resistance includes homogenizing at least a portion of an article of a stainless steel including chromium, nickel, and molybdenum and having a PREN of at least 50, as calculated by the equation: PREN = Cr + (3.3 x Mo) + (30 x N), where Cr i s weight percent chromium, Mo is weight percent molybdenum, and N is weight percent nitrogen in the steel. In one form of the method, at least a portion of the article is remelted to homogenize the portion. In another form of the method, the article is annealed under conditions sufficient to homogenize at least a surface region of the article. The method of the invention enhances corrosion resistance of the stainless steel as reflected by the steel's critical crevice corrosion temperature.
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Patent Agency Ranking
公开(公告)号：CA2443545C
公开(公告)日：2010-09-21
申请号：CA2443545
申请日：2002-04-18
Applicant: ATI PROPERTIES INC
Inventor： GRUBB JOHN F , FRITZ JAMES D
IPC: C21D8/00 , C22B9/16 , C21D1/09 , C21D1/26 , C21D1/34 , C21D6/00 , C21D9/00 , C22B9/18 , C22B9/20 , C22B9/22 , C22C19/05 , C22C28/00 , C22C38/00 , C22C38/44 , C22C38/58 , F28F21/08
Abstract: A method for producing a stainless steel with improved corrosion resistance includes homogenizing at least a portion of an article of a stainless steel including chromium, nickel, and molybdenum and having a PREN of at least 50, as calculated by the equation: PREN = Cr + (3.3 x Mo) + (30 x N), where Cr is weight percent chromium, Mo is weight percent molybdenum, and N is weight percent nitrogen in the steel. In one form of the method, at least a portion of the article is remelted to homogenize the portion. In another form of the method, the article is annealed under conditions sufficient to homogenize at least a surface region of the article. The method of the invention enhances corrosion resistance of the stainless steel as reflected by the steel's critical crevice corrosion temperature.
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公开(公告)号：CA2407591C
公开(公告)日：2008-10-07
申请号：CA2407591
申请日：2001-08-02
Applicant: ATI PROPERTIES INC
Inventor： GRUBB JOHN F , POLINSKI RONALD E , FRITZ JAMES D
Abstract: A method of enhancing the corrosion resistance of an austenitic steel includes removing material from at least a portion of a surface of the steel such that corrosion initiation sites are eliminated or are reduced in number relative to the number resulting from processing in a conventional manner. Material may be removed from the portion by any suitable method, including, for example, grit blasting, grinding and/or acid pickling under conditions more aggressive than those used in conventional processing of the same steel.
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公开(公告)号：AU2001279169B9
公开(公告)日：2006-05-18
申请号：AU2001279169
申请日：2001-08-02
Applicant: ATI PROPERTIES INC
Inventor： GRUBB JOHN F , POLINSKI RONALD E , FRITZ JAMES D
Abstract: A method of enhancing the corrosion resistance of an austenitic steel includes removing material from at least a portion of a surface of the steel such that corrosion initiation sites are eliminated or are reduced in number relative to the number resulting from processing in a conventional manner. Material may be removed from the portion by any suitable method, including, for example, grit blasting, grinding and/or acid pickling under conditions more aggressive than those used in conventional processing of the same steel.
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公开(公告)号：AU2002256261B2
公开(公告)日：2005-02-10
申请号：AU2002256261
申请日：2002-04-18
Applicant: ATI PROPERTIES INC
Inventor： GRUBB JOHN F , FRITZ JAMES D
IPC: C22B9/16 , C21D1/09 , C21D1/26 , C21D1/34 , C21D6/00 , C21D8/00 , C22B9/18 , C22B9/20 , C22B9/22 , C22C38/00 , C22C38/44 , C22C38/58 , F28F21/08 , C21D008/00 , C21D001/26 , C22C038/44 , C22C028/00 , C22C019/05 , C21D009/00 , C21D001/09
Abstract: A method for producing a stainless steel with improved corrosion resistance includes homogenizing at least a portion of an article of a stainless steel including chromium, nickel, and molybdenum and having a PREN of at least 50, as calculated by the equation:where Cr is weight percent chromium, Mo is weight percent molybdenum, and N is weight percent nitrogen in the steel. In one form of the method, at least a portion of the article is remelted to homogenize the portion. In another form of the method, the article is annealed under conditions sufficient to homogenize at least a surface region of the article. The method of the invention enhances corrosion resistance of the stainless steel as reflected by the steel's critical crevice corrosion temperature.
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公开(公告)号：AU7916901A
公开(公告)日：2002-02-18
申请号：AU7916901
申请日：2001-08-02
Applicant: ATI PROPERTIES INC
Inventor： GRUBB JOHN F , FRITZ JAMES D , POLINSKI RONALD E
IPC: C23F1/00 , C22C38/00 , C22C38/18 , C22C38/42 , C22C38/44 , C23F15/00 , C23G1/08 , C23G1/02 , C22C38/22 , C22C38/40
Abstract: A method of enhancing the corrosion resistance of an austenitic steel includes removing material from at least a portion of a surface of the steel such that corrosion initiation sites are eliminated or are reduced in number relative to the number resulting from processing in a conventional manner. Material may be removed from the portion by any suitable method, including, for example, grit blasting, grinding and/or acid pickling under conditions more aggressive than those used in conventional processing of the same steel.
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