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    2.
    发明专利
    未知

    公开(公告)号：BR0209091A

    公开(公告)日：2004-10-13

    申请号：BR0209091

    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 ,  C21D9/00 ,  C22C28/00 ,  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: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.

    3.
    发明专利
    未知

    公开(公告)号：BR0111076A

    公开(公告)日：2004-01-13

    申请号：BR0111076

    申请日：2001-08-02

    Applicant: ATI PROPERTIES INC

    Inventor： GRUBB JOHN F ,  FRITZ JAMES D ,  POLINSKI ROANLD 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.

    4.
    发明专利
    未知

    公开(公告)号：NO20034714D0

    公开(公告)日：2003-10-21

    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 ,  C21D

    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.

    Método de producción de aceros inoxidables que tiene una resistencia a la corrosión mejorada
    6.
    发明专利
    Método de producción de aceros inoxidables que tiene una resistencia a la corrosión mejorada 未知

    公开(公告)号：ES2567193T3

    公开(公告)日：2016-04-20

    申请号：ES02725712

    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: Un método para mejorar la resistencia a la corrosión de un acero inoxidable que comprende una fase austenítica, comprendiendo el método: proporcionar un artículo de un acero inoxidable que comprende del 20 al 22 por ciento en peso de cromo, del 23,5 al 25,5 por ciento en peso de níquel, del 6,0 al 7,0 por ciento en peso de molibdeno, del 0,18 al 0,25 por ciento en peso de nitrógeno, hasta el 0,03 por ciento en peso de carbono, hasta el 2,0 por ciento en peso de manganeso, hasta el 0,04 por ciento en peso de azufre, hasta el 1,0 por ciento en peso de silicio, y hasta el 0,75 por ciento en peso de cobre, todo ello basado en el peso total del acero inoxidable, el resto que es hierro e impurezas fortuitas, y que tiene un PREN de al menos 50 tal como se determina por la ecuación PREN >= Cr + (3,3 × Mo) + (30 × N), en la que Cr es el porcentaje en peso de cromo, Mo es el porcentaje en peso de molibdeno y N es el porcentaje en peso de nitrógeno, todos ellos basado en el peso total de acero; y homogeneizar al menos una parte del artículo para reducir el grado de segregación de molibdeno en la parte refundiendo al menos parte del acero inoxidable, en donde la etapa de refundición de al menos parte del acero inoxidable comprende la refundición por haces de electrones o refundición superficial por láser de la parte del acero inoxidable.

    9.
    发明专利
    未知

    公开(公告)号：NO20030586L

    公开(公告)日：2003-02-06

    申请号：NO20030586

    申请日：2003-02-06

    Applicant: ATI PROPERTIES INC

    Inventor： GRUBB JOHN F ,  FRITZ JAMES D ,  POLINSKI RONALD E

    IPC: C22C38/00 ,  C22C38/18 ,  C23F1/00 ,  C22C38/42 ,  C22C38/44 ,  C23F15/00 ,  C23G1/08

    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.

    10.
    发明专利
    未知

    公开(公告)号：NO20030586D0

    公开(公告)日：2003-02-06

    申请号：NO20030586

    申请日：2003-02-06

    Applicant: ATI PROPERTIES INC

    Inventor： GRUBB JOHN F ,  FRITZ JAMES D ,  POLINSKI RONALD E

    IPC: C22C38/00 ,  C22C38/18 ,  C23F1/00 ,  C22C38/42 ,  C22C38/44 ,  C23F15/00 ,  C23G1/08

    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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