Patents Assigned to Bluescope Steel Limited
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Publication number: 20240141471Abstract: A method of forming an Al—Zn—Si—Mg alloy coating on a steel strip includes dipping steel strip into a bath of molten Al—Zn—Si—Mg alloy and forming a coating of the alloy on exposed surfaces of the steel strip. The method also includes controlling conditions in the molten coating bath and downstream of the coating bath so that there is a uniform Al/Zn ratio across the surface of the coating formed on the steel strip. An Al—Zn—Mg—Si coated steel strip includes a uniform Al/Zn ratio on the surface or the outermost 1-2 ?m of the Al—Zn—Si—Mg alloy coating.Type: ApplicationFiled: November 3, 2023Publication date: May 2, 2024Applicants: Bluescope Steel Limited, Nippon Steel Corporation, Nippon Steel Coated Sheet CorporationInventors: Wayne Andrew RENSHAW, Cat TU, Joe WILLIAMS, Jason HODGES, Shiro FUJII, Nobuyuki SHIMODA, Shuichi KONDO, Takashi HIRASAWA
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Publication number: 20240117480Abstract: An Al—Zn—Si—Mg alloy coated strip that has Mg2Si particles in the coating microstructure is disclosed. The distribution of Mg2Si particles is such that the surface of the coating has only a small proportion of Mg2Si particles or is at least substantially free of any Mg2Si particles.Type: ApplicationFiled: October 17, 2023Publication date: April 11, 2024Applicant: Bluescope Steel LimitedInventors: Qiyang LIU, Wayne RENSHAW, Joe WILLIAMS
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Publication number: 20240076769Abstract: Red rust staining of Al/Zn coated steel strip in “acid rain” or “polluted” environments can be minimised by forming the coating as an Al—Zn—Si—Mg alloy coating with an OT:SDAS ratio greater than a value of 0.5:1, where OT is the overlay thickness on a surface of the strip and SDAS is the measure of the secondary dendrite arm spacing for the Al-rich alpha phase dendrites in the coating. Red rust staining in “acid rain” or “polluted” environments and corrosion at cut edges in marine environments can be minimised in Al—Zn—Si—Mg alloy coatings on steel strip by selection of the composition (principally Mg and Si) and solidification control (principally by cooling rate) and forming Mg2Si phase particles of a particular morphology in interdendritic channels.Type: ApplicationFiled: August 8, 2023Publication date: March 7, 2024Applicant: Bluescope Steel LimitedInventors: Ross McDowall SMITH, Qiyang LIU, Bryan Andrew SHEDDEN, Aaron Kiffer NEUFELD, Joe WILLIAMS, David James NOLAN, Wayne RENSHAW
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Publication number: 20240026512Abstract: An Al—Zn—Si—Mg alloy coated strip that has Mg2Si particles in the coating microstructure is disclosed. The distribution of Mg2Si particles is such that a surface region of the coating has only a small proportion of Mg2Si particles or is at least substantially free of any Mg2Si particles.Type: ApplicationFiled: June 27, 2023Publication date: January 25, 2024Applicant: Bluescope Steel LimitedInventors: Qiyang LIU, Wayne RENSHAW, Joe WILLIAMS
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Patent number: 11840763Abstract: An Al—Zn—Si—Mg alloy coated strip that has Mg2Si particles in the coating microstructure is disclosed. The distribution of Mg2Si particles is such that the surface of the coating has only a small proportion of Mg2Si particles or is at least substantially free of any Mg2Si particles.Type: GrantFiled: June 1, 2022Date of Patent: December 12, 2023Assignee: Bluescope Steel LimitedInventors: Qiyang Liu, Wayne Renshaw, Joe Williams
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Publication number: 20230381811Abstract: A process for coating a product by ion exchange including: a) providing a product that contains a surface segregating species (SSS) having a low surface energy component and an ionic component wherein the SSS has segregated to an outer surface of the product to form an activated surface; and b) treating the activated surface of the product with a liquid containing a surface modifying agent comprising one or more polyionic species, wherein the polyionic species is attracted to and deposits on the activated surface through a process of ion exchange.Type: ApplicationFiled: August 3, 2023Publication date: November 30, 2023Applicant: Bluescope Steel LimitedInventors: Shane A. MACLAUGHLIN, Binbin XI
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Patent number: 11807941Abstract: Red rust staining of Al/Zn coated steel strip in “acid rain” or “polluted” environments can be minimised by forming the coating as an Al—Zn—Si—Mg alloy coating with an OT:SDAS ratio greater than a value of 0.5:1, where OT is the overlay thickness on a surface of the strip and SDAS is the measure of the secondary dendrite arm spacing for the Al-rich alpha phase dendrites in the coating. Red rust staining in “acid rain” or “polluted” environments and corrosion at cut edges in marine environments can be minimised in Al—Zn—Si—Mg alloy coatings on steel strip by selection of the composition (principally Mg and Si) and solidification control (principally by cooling rate) and forming Mg2Si phase particles of a particular morphology in interdendritic channels.Type: GrantFiled: October 14, 2022Date of Patent: November 7, 2023Assignee: Bluescope Steel LimitedInventors: Ross McDowall Smith, Qiyang Liu, Bryan Andrew Shedden, Aaron Kiffer Neufeld, Joe Williams, David James Nolan, Wayne Renshaw
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Patent number: 11759819Abstract: A process for coating a product by ion exchange including: a) providing a product that contains a surface segregating species (SSS) having a low surface energy component and an ionic component wherein the SSS has segregated to an outer surface of the product to form an activated surface; and b) treating the activated surface of the product with a liquid containing a surface modifying agent comprising one or more polyionic species, wherein the polyionic species is attracted to and deposits on the activated surface through a process of ion exchange.Type: GrantFiled: May 16, 2017Date of Patent: September 19, 2023Assignee: BLUESCOPE STEEL LIMITEDInventors: Shane A. MacLaughlin, Binbin Xi
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Patent number: 11702838Abstract: A wall/roof panel includes (a) a façade that has (i) an outer surface that defines a front surface of the panel and (ii) a rear surface and (b) a structural element connected to and supporting the façade.Type: GrantFiled: November 26, 2018Date of Patent: July 18, 2023Assignee: BLUESCOPE STEEL LIMITEDInventors: John Kralic, Michael Celeban, Rodney Gallaty, Robert Klees, Glen Hampton
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Patent number: 11613792Abstract: A method of forming a coating of an Al—Zn—Si—Mg alloy on a steel strip to form an Al—Zn—Mg—Si coated steel strip is disclosed. The method includes the steps of dipping steel strip into a bath of molten Al—Zn—Si—Mg alloy and forming a coating of the alloy on exposed surfaces of the steel strip and cooling the coated strip with cooling water. The cooling step includes controlling the p H of cooling water to be in a range of pH 5-9. Particular embodiments focus on Al—Zn—Si—Mg alloys that contain the following elements in % by weight: Zn: 2 to 19, Si: 0.01 to 2, Mg: 1 to 10, and Balance Al and unavoidable impurities.Type: GrantFiled: August 15, 2018Date of Patent: March 28, 2023Assignee: Bluescope Steel LimitedInventors: Wayne Andrew Renshaw, Aaron Kiffer Neufeld, Ross McDowall Smith, Geoff Tapsell
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Patent number: 11512377Abstract: Red rust staining of Al/Zn coated steel strip in “acid rain” or “polluted” environments can be minimised by forming the coating as an Al—Zn—Si—Mg alloy coating with an OT:SDAS ratio greater than a value of 0.5:1, where OT is the overlay thickness on a surface of the strip and SDAS is the measure of the secondary dendrite arm spacing for the Al-rich alpha phase dendrites in the coating. Red rust staining in “acid rain” or “polluted” environments and corrosion at cut edges in marine environments can be minimised in Al—Zn—Si—Mg alloy coatings on steel strip by selection of the composition (principally Mg and Si) and solidification control (principally by cooling rate) and forming Mg2Si phase particles of a particular morphology in interdendritic channels.Type: GrantFiled: September 9, 2020Date of Patent: November 29, 2022Assignee: Bluescope Steel LimitedInventors: Ross McDowall Smith, Qiyang Liu, Bryan Andrew Shedden, Aaron Kiffer Neufeld, Joe Williams, David James Nolan, Wayne Renshaw
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Patent number: 11155911Abstract: A method of forming an Al—Zn—Si—Mg alloy coating on a steel strip includes dipping steel strip into a bath of molten Al—Zn—Si—Mg alloy and forming a coating of the alloy on exposed surfaces of the steel strip. The method also includes controlling conditions in the molten coating bath and downstream of the coating bath so that there is a uniform Al/Zn ratio across the surface of the coating formed on the steel strip. An Al—Zn—Mg—Si coated steel strip includes a uniform Al/Zn ratio on the surface or the outermost 1-2 ?m of the Al—Zn—Si—Mg alloy coating.Type: GrantFiled: March 6, 2014Date of Patent: October 26, 2021Assignees: Bluescope Steel Limited, Nippon Steel Corporation, Nippon Steel Coated Sheet CorporationInventors: Wayne Andrew Renshaw, Cat Tu, Joe Williams, Jason Hodges, Shiro Fujii, Nobuyuki Shimoda, Shuichi Kondo, Takashi Hirasawa
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Patent number: D927022Type: GrantFiled: December 19, 2019Date of Patent: August 3, 2021Assignee: BlueScope Steel LimitedInventors: Robert Klees, Dion Zappacosta, John Szalla
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Patent number: D927023Type: GrantFiled: December 19, 2019Date of Patent: August 3, 2021Assignee: BlueScope Steel LimitedInventors: Robert Klees, Dion Zappacosta, John Szalla
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Patent number: D942052Type: GrantFiled: June 19, 2020Date of Patent: January 25, 2022Assignee: BLUESCOPE STEEL LIMITEDInventor: Michael Lette
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Patent number: D943119Type: GrantFiled: June 19, 2020Date of Patent: February 8, 2022Assignee: BLUESCOPE STEEL LIMITEDInventor: Michael Lette
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Patent number: D943777Type: GrantFiled: June 19, 2020Date of Patent: February 15, 2022Assignee: BLUESCOPE STEEL LIMITEDInventor: Michael Lette
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Patent number: D943778Type: GrantFiled: June 19, 2020Date of Patent: February 15, 2022Assignee: BLUESCOPE STEEL LIMITEDInventor: Michael Lette
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Patent number: D943779Type: GrantFiled: June 19, 2020Date of Patent: February 15, 2022Assignee: BLUESCOPE STEEL LIMITEDInventor: Michael Lette
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Patent number: D944419Type: GrantFiled: June 19, 2020Date of Patent: February 22, 2022Assignee: BLUESCOPE STEEL LIMITEDInventor: Michael Lette