公开(公告)号：CA2299430A1

公开(公告)日：1999-02-18

申请号：CA2299430

申请日：1998-08-04

Applicant: INTEGRAN TECHNOLOGIES INC

Inventor： LIMOGES DAVID L ,  LIN PETER KENG-YU ,  PALUMBO GINO ,  LEHOCKEY EDWARD M

IPC: C21D1/78 ,  C21D6/02 ,  C21D8/00 ,  C21D8/02 ,  C22C19/05 ,  C22C38/00 ,  C22F1/00 ,  C22F1/10

Abstract: A method is provided for improving the microstructure of nickel- and ironbased precipitation strengthened superalloys used in high temperature applications by increasing the frequency of "special", low-.SIGMA. CSL grain boundaries to levels in excess of 50 %. Processing entails applying specific thermomechanical processing sequences to precipitation hardenable alloys comprising a series of cold deformation and recrystallization-annealing steps performed within specific limits of deformation, temperature, and annealing time. Materials produced by this process exhibit significantly improved resistance to high temperature degradation (e.g. creep, hot corrosion, etc.), enhanced weldability, and high cycle fatigue resistance.

公开(公告)号：CA2299419A1

公开(公告)日：1999-02-18

申请号：CA2299419

申请日：1998-08-04

Applicant: INTEGRAN TECHNOLOGIES INC

Inventor： PALUMBO GINO ,  LEHOCKEY EDWARD M ,  LIN PETER KENG-YU ,  LIMOGES DAVID L

IPC: C22C11/00 ,  C22F1/00 ,  C22F1/12 ,  C25C7/02

Abstract: Lead and lead-alloy anodes for electrowinning metals such as zinc, copper, lead, tin, nickel and manganese from sulfuric acid solutions, whereby the electrodes are processed by a repetitive sequence of cold deformation and recrystallization heat treatment, within specified limits of deformation, temperature and annealing time, to achieve an improved microstructure consisting of a high frequency of special low .SIGMA. CSL grain boundaries (i.e. 50 %). The resultant electrodes possess significantly improved resistance to intergranular corrosion, and yield (1) extended service life, (2) the potential for reduction in electrode thickness with a commensurate increase in the number of electrodes per electrowinning cell, and (3) the opportunity to extract higher purity metal product.

公开(公告)号：AU740002B2

公开(公告)日：2001-10-25

申请号：AU8620498

申请日：1998-08-04

Applicant: INTEGRAN TECHNOLOGIES INC

Inventor： LEHOCKEY EDWARD M ,  PALUMBO GINO ,  LIN PETER KENG-YU ,  LIMOGES DAVID L

IPC: C22C11/00 ,  C22F1/00 ,  C22F1/12 ,  C25C7/02

Abstract: Lead and lead-alloy anodes for electrowinning metals such as zinc, copper, lead, tin, nickel and manganese from sulfuric acid solutions, whereby the electrodes are processed by a repetitive sequence of cold deformation and recrystallization heat treatment, within specified limits of deformation, temperature and annealing time, to achieve an improved microstructure consisting of a high frequency of special low SIGMA CSL grain boundaries (i.e.>50%). The resultant electrodes possess significantly improved resistance to intergranular corrosion, and yield (1) extended service life, (2) the potential for reduction in electrode thickness with a commensurate increase in the number of electrodes per electrowinning cell, and (3) the opportunity to extract higher purity metal product.

公开(公告)号：CA2299430C

公开(公告)日：2003-12-23

申请号：CA2299430

申请日：1998-08-04

Applicant: INTEGRAN TECHNOLOGIES INC

Inventor： LIN PETER KENG-YU ,  PALUMBO GINO ,  LEHOCKEY EDWARD M ,  LIMOGES DAVID L

IPC: C21D1/78 ,  C21D6/02 ,  C21D8/00 ,  C21D8/02 ,  C22C19/05 ,  C22C38/00 ,  C22F1/00 ,  C22F1/10

Abstract: A method is provided for improving the microstructure of nickel- and iron- based precipitation strengthened superalloys used in high temperature applications by increasing the frequency of "special", low- .SIGMA.CSL grain boundaries to levels in excess of 50 9'0. Processing entail s applying specific thermomechanical processing sequences to precipitation hardenable alloys comprising a series of cold deformation and recrystallization-annealing steps performed within specific limits of deformation, temperature, and annealing time. Materials produced by this process exhibit significantly improved resistance to high temperature degradation (e.g. creep, hot corrosion, etc.), enhanced weldability, and high cycle fatigue resistance.

公开(公告)号：CA2299419C

公开(公告)日：2003-11-18

申请号：CA2299419

申请日：1998-08-04

Applicant: INTEGRAN TECHNOLOGIES INC

Inventor： LEHOCKEY EDWARD M ,  PALUMBO GINO ,  LIN PETER KENG-YU ,  LIMOGES DAVID L

IPC: C22C11/00 ,  C22F1/00 ,  C22F1/12 ,  C25C7/02

Abstract: Lead and lead-alloy anodes for electrowinning metals such as zinc, copper, lead, tin, nickel and manganese from sulfuric acid solutions, whereby the electrodes are processed by a repetitive sequence of cold deformation and recrystallization heat treatment, within specified limits of deformation, temperature and annealing time, to achieve an improved microstructure consisting of a high frequency of special low .SIGMA. CSL grain boundaries (i.e. 50 %). The resultant electrodes possess significantly improved resistance to intergranular corrosion, and yield (1) extended service life, (2) the potential for reduction in electrode thickness with a commensurate increase in the number of electrodes per electrowinning cell, and (3) the opportunity to extract higher purity metal product.