Patents by Inventor Jonathan Dorricott
Jonathan Dorricott has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7220325Abstract: A process for enhancing precipitation strengthening in steel and for making a high-strength micro-alloy steel, and a steel made from the process. The process includes the step of deforming the steel containing a suitable precipitate strengthening substance, at a temperature at which the microstructure of the steel is essentially stable and at which those precipitation strengthening particles that form are of a desirable particle size for precipitation strengthening. Deforming the steel introduces dislocations in the crystal structure of the steel, which increases the kinetics of precipitation by increasing the number of precipitation nucleation sites and accelerating the rate of diffusion of the precipitate material. The steel may be deformed by bending or rolling the steel. Preferably the process also includes the step of cooling the steel at a rapid rate so as to minimize the formation of precipitate particles of a larger-than-desired size.Type: GrantFiled: October 2, 2003Date of Patent: May 22, 2007Assignee: IPSCO Enterprises, Inc.Inventors: Dengqi Bai, Michael Ambrose Cooke, James Asante, Jonathan Dorricott
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Publication number: 20040101432Abstract: A process for enhancing precipitation strengthening in steel and for making a high-strength micro-alloy steel, and a steel made from the process. The process includes the step of deforming the steel containing a suitable precipitate strengthening substance, at a temperature at which the microstructure of the steel is essentially stable and at which those precipitation strengthening particles that form are of a desirable particle size for precipitation strengthening. Deforming the steel introduces dislocations in the crystal structure of the steel, which increases the kinetics of precipitation by increasing the number of precipitation nucleation sites and accelerating the rate of diffusion of the precipitate material. The steel may be deformed by bending or rolling the steel. Preferably the process also includes the step of cooling the steel at a rapid rate so as to minimize the formation of precipitate particles of a larger-than-desired size.Type: ApplicationFiled: October 2, 2003Publication date: May 27, 2004Applicant: IPSCO Enterprises Inc.Inventors: Dengqi Bai, Michael Ambrose Cooke, James Asante, Jonathan Dorricott
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Patent number: 6682613Abstract: A process for enhancing precipitation strengthening in steel and for making a high-strength micro-alloy steel, and a steel made from the process. The process includes the step of deforming the steel containing a suitable precipitate strengthening substance, at a temperature at which the microstructure of the steel is essentially stable and at which those precipitation strengthening particles that form are of a desirable particle size for precipitation strengthening. Deforming the steel introduces dislocations in the crystal structure of the steel, which increases the kinetics of precipitation by increasing the number of precipitation nucleation sites and accelerating the rate of diffusion of the precipitate material. The steel may be deformed by bending or rolling the steel. Preferably the process also includes the step of cooling the steel at a rapid rate so as to minimize the formation of precipitate particles of a larger-than-desired size.Type: GrantFiled: April 3, 2002Date of Patent: January 27, 2004Assignee: IPSCO Enterprises Inc.Inventors: Dengqi Bai, Michael Ambrose Cooke, James Asante, Jonathan Dorricott
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Publication number: 20030190251Abstract: A process for enhancing precipitation strengthening in steel and for making a high-strength micro-alloy steel, and a steel made from the process. The process includes the step of deforming the steel containing a suitable precipitate strengthening substance, at a temperature at which the microstructure of the steel is essentially stable and at which those precipitation strengthening particles that form are of a desirable particle size for precipitation strengthening. Deforming the steel introduces dislocations in the crystal structure of the steel, which increases the kinetics of precipitation by increasing the number of precipitation nucleation sites and accelerating the rate of diffusion of the precipitate material. The steel may be deformed by bending or rolling the steel. Preferably the process also includes the step of cooling the steel at a rapid rate so as to minimize the formation of precipitate particles of a larger-than-desired size.Type: ApplicationFiled: April 3, 2002Publication date: October 9, 2003Applicant: IPSCO Enterprises Inc.Inventors: Dengqi Bai, Michael Ambrose Cooke, James Asante, Jonathan Dorricott
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Patent number: 6557622Abstract: Surface defects in rolled steel are remedied by quenching a surface layer of the steel product downstream of the caster and upstream of the reheat furnace by transversely differentiated quenching to match the transverse temperature profile of the steel product. The flow rate of the quench spray is differentially adjustable across the width and optionally the length of the steel product. An array of spray nozzles controlled in transversely or longitudinally arranged groups provides the quench spray.Type: GrantFiled: February 19, 2002Date of Patent: May 6, 2003Assignee: IPSCO Enterprises Inc.Inventors: William R. Frank, Jonathan Dorricott, Laurie E. Collins, Joseph D. Russo, Robert J. Boecker, Brian H. Wales
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Patent number: 6502627Abstract: An apparatus for providing a magnetic field in a casting mold to slow and redirect in a controllable fashion the flow of liquid steel exiting from a submerged entry nozzle into the casting mold uses selectable removable ferromagnetic and non-magnetic laminar elements stackable on the ends of core fingers in the vicinity of the poles of an electromagnetic yoke positioned adjacent the mold face. By selecting the type and location of the stackable elements on the ends of the fingers, one can modify the properties of the magnetic field permeating the interior of the mold. Optionally, independent field coils may be provided for energizing selected portions of the magnetic field core structure to provide further magnetic field control without having to remove and replace laminar elements.Type: GrantFiled: September 17, 2001Date of Patent: January 7, 2003Assignee: Ipsco Enterprises Inc.Inventors: William R. Frank, Jonathan Dorricott
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Publication number: 20020129921Abstract: Surface defects in rolled steel are remedied by quenching a surface layer of the steel product downstream of the caster and upstream of the reheat furnace by transversely differentiated quenching to match the transverse temperature profile of the steel product. The flow rate of the quench spray is differentially adjustable across the width and optionally the length of the steel product. An array of spray nozzles controlled in transversely or longitudinally arranged groups provides the quench spray.Type: ApplicationFiled: February 19, 2002Publication date: September 19, 2002Inventors: William R. Frank, Jonathan Dorricott, Laurie E. Collins, Joseph D. Russo, Robert J. Boecker, Brian H. Wales
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Publication number: 20020104597Abstract: A steel rolling mill including a Steckel mill is provided with an in-line upstream quench station located downstream of the caster and upstream of the reheat furnace, a shear located downstream of the Steckel mill, and a temperature reduction station downstream of the shear. The upstream quench station has spray nozzles that quench a surface layer of the steel to transform same from an austentitic to a non-austentitic microstructure. The shear provides a precise transverse vertical face on the leading end of the steel. The temperature reduction station applies cooling fluid to the rolled steel so as to obtain a preferred microstructure that may be either bainite or martensite. If bainite, the temperature reduction station includes laminar-flow cooling apparatus; if martensite, the station also includes an initial rapid quench, in which latter case the station is followed by a tempering furnace.Type: ApplicationFiled: July 19, 2001Publication date: August 8, 2002Applicant: IPSCO Enterprises Inc.Inventors: William R. Frank, Jonathan Dorricott, Laurie E. Collins, Joseph Duane Russo, Robert Joseph Becker, Brian H. Wales
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Publication number: 20020074103Abstract: An apparatus for providing a magnetic field in a casting mold to slow and redirect in a controllable fashion the flow of liquid steel exiting from a submerged entry nozzle into the casting mold uses selectable removable ferromagnetic and non-magnetic laminar elements stackable on the ends of core fingers in the vicinity of the poles of an electromagnetic yoke positioned adjacent the mold face. By selecting the type and location of the stackable elements on the ends of the fingers, one can modify the properties of the magnetic field permeating the interior of the mold. Optionally, independent field coils may be provided for energizing selected portions of the magnetic field core structure to provide further magnetic field control without having to remove and replace laminar elements.Type: ApplicationFiled: September 17, 2001Publication date: June 20, 2002Applicant: Ipsco Enterprises Inc.Inventors: William R. Frank, Jonathan Dorricott
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Patent number: 6374901Abstract: Surface defects in rolled steel are remedied by quenching a surface layer of the strand immediately downstream of the caster by transversely differential quenching to match the transverse temperature profile of the strand. The flow rate of the quench spray is differentially adjustable across the width and optionally the length of the strand. An array of spray nozzles controlled by groups provides the quench spray.Type: GrantFiled: July 9, 1999Date of Patent: April 23, 2002Assignee: IPSCO Enterprises Inc.Inventors: William R. Frank, Jonathan Dorricott, Laurie E. Collins, Joseph D. Russo, Robert J. Boecker, Brian H. Wales
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Patent number: 6341642Abstract: An apparatus for providing a magnetic field in a casting mold to slow and redirect in a controllable fashion the flow of liquid steel exiting from a submerged entry nozzle into the casting mold uses selectable removable ferromagnetic and non-magnetic laminar elements stackable on the ends of core fingers in the vicinity of the poles of an electromagnetic yoke positioned adjacent the mold face. By selecting the type and location of the stackable elements on the ends of the fingers, one can modify the properties of the magnetic field permeating the interior of the mold. Optionally, independent field coils may be provided for energizing selected portions of the magnetic field core structure to provide further magnetic field control without having to remove and replace laminar elements.Type: GrantFiled: September 24, 1999Date of Patent: January 29, 2002Assignee: IPSCO Enterprises Inc.Inventors: William R. Frank, Jonathan Dorricott
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Patent number: 6309482Abstract: The in-line combination of a reversing rolling mill (Steckel mill) and its coiler furnaces with accelerated controlled cooling apparatus immediately downstream thereof and associated method permits steel to be sequentially reversingly rolled to achieve an overall reduction of at least about 3:1, imparted by a first reduction while the steel is kept at a temperature above the Tnr by the coiler furnaces so as to preserve an optimum opportunity for controlled recrystallization of the steel after each rolling pass, and a second reduction while the temperature of the steel drops from about the Tnr to about the Ar3. The second reduction is preferably of the order of 2:1 as a result of which the steel reaches a final plate thickness.Type: GrantFiled: May 17, 2000Date of Patent: October 30, 2001Inventors: Jonathan Dorricott, William R. Frank
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Patent number: 6264767Abstract: A steel rolling mill including a Steckel mill is provided with an in-line upstream quench station located downstream of the caster and upstream of the reheat furnace, a shear located downstream of the Steckel mill, and a temperature reduction station downstream of the shear. The upstream quench station has spray nozzles that quench a surface layer of the steel to transform same from an austentitic to a non-austentitic microstructure. The shear provides a precise transverse vertical face on the leading end of the steel. The temperature reduction station applies cooling fluid to the rolled steel so as to obtain a preferred microstructure that may be either bainite or martensite. If bainite, the temperature reduction station includes laminar-flow cooling apparatus; if martensite, the station also includes an initial rapid quench, in which latter case the station is followed by a tempering furnace.Type: GrantFiled: July 9, 1999Date of Patent: July 24, 2001Assignee: IPSCO Enterprises Inc.Inventors: William R. Frank, Jonathan Dorricott, Laurie E. Collins, Joseph Duane Russo, Robert Joseph Boecker, Brian H. Wales
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Patent number: 6006822Abstract: An apparatus for providing a magnetic field in a casting mold to slow and redirect in a controllable fashion the flow of liquid steel exiting a submerged entry nozzle in the casting mold using removable laminar elements arrangeable in a horizontal series of vertical stacked arrays in association with corresponding side-by-side laminar constituents of the magnetic field core, or independent field coils for energizing each laminar portion of the magnetic field core, or both. The removable elements are preferably stackable rectangular parallelepiped plates together forming selectably a portion or all of the poles of the core as they extend into proximity with the transverse mold sides at selected locations.Type: GrantFiled: July 1, 1998Date of Patent: December 28, 1999Assignee: IPSCO Enterprises Inc.Inventors: William R. Frank, Jonathan Dorricott
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Patent number: 5924318Abstract: An optimizing method for improving the efficiency of production is provided for a steel rolling mill using a Steckel mill to roll steel slab to end-product thickness, and associated downstream equipment of limited capacity to generate strip and/or plate end-product. The optimizing method allows for continuous processing of steel slab of a mass within the capacity limits of the Steckel mill and equipment upstream of the Steckel mill, but in excess of the capacity of the associated downstream equipment, by first rolling the slab in the Steckel mill to intermediate coilable thickness, and then severing the intermediate steel product to produce two derivative segments, one of a target mass within the limit of capacity of the coiler furnaces and downstream equipment, and another, typically smaller, residual segment. The residual segment is disposed of, optionally first milled to end-product thickness in the Steckel mill, and transferred to conventional downstream equipment.Type: GrantFiled: June 6, 1997Date of Patent: July 20, 1999Assignee: IPSCO Enterprises Inc.Inventor: Jonathan Dorricott
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Patent number: 5810951Abstract: The in-line combination of a reversing rolling mill (Steckel mill) and its coiler furnaces with accelerated controlled cooling apparatus immediately downstream thereof and associated method permits steel to be sequentially reversingly rolled to achieve an overall reduction of at least about 3:1, imparted by a first reduction while the steel is kept at a temperature above the T.sub.nr by the coiler furnaces so as to preserve an optimum opportunity for controlled recrystallization of the steel after each rolling pass, and a second reduction while the temperature of the steel drops from about the T.sub.nr to about the Ar.sub.3. The second reduction is preferably of the order of 2:1 as a result of which the steel reaches a final plate thickness. The steel product then passes through the accelerated controlled cooling apparatus, preferably applying laminar flow cooling at least to the upper surface of the steel passing therethrough so as to reduce the temperature of the steel from about the Ar.sub.Type: GrantFiled: January 31, 1996Date of Patent: September 22, 1998Assignee: IPSCO Enterprises Inc.Inventor: Jonathan Dorricott
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Patent number: 5706688Abstract: An optimizing method for improving the efficiency of production is provided for a steel rolling mill using a Steckel mill to roll steel slab to end-product thickness, and associated downstream equipment of limited capacity to generate strip and/or plate end-product. The optimizing method allows for continuous processing of steel slab of a mass within the capacity limits of the Steckel mill and equipment upstream of the Steckel mill, but in excess of the capacity of the associated downstream equipment, by first rolling the slab in the Steckel mill to intermediate coilable thickness, and then severing the intermediate steel product to produce two derivative segments, one of a target mass within the limit of capacity of the coiler furnaces and downstream equipment, and another, typically smaller, residual segment. The residual segment is disposed of, optionally first milled to end-product thickness in the Steckel mill, and transferred to conventional downstream equipment.Type: GrantFiled: June 7, 1995Date of Patent: January 13, 1998Assignee: IPSCO Enterprises Inc.Inventor: Jonathan Dorricott