Patents by Inventor Ulf Kivisäkk
Ulf Kivisäkk 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: 11090627Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C ?0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10;? Mo 0-4.0; N 0.30-0.55;?? Cu 0-0.8; W 0-3.0; S ?0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.Type: GrantFiled: April 24, 2020Date of Patent: August 17, 2021Assignee: Stamicarbon B.V.Inventors: Linn Larsson, Daniel Gullberg, Ulf Kivisäkk, Martin Östlund, Alexander Aleida Antonius Scheerder
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Patent number: 11035028Abstract: The present disclosure relates to a powder of an austenitic alloy and a HIP:ed object manufactured thereof and a process for the manufacturing the HIP:ed object and its use in corrosive environments.Type: GrantFiled: March 21, 2018Date of Patent: June 15, 2021Assignee: Sandvik Intellectual Property ABInventors: Hans Söderberg, Thomas Blomfeldt, Ulf Kivisäkk, Lars-Olov Nordberg, Zhiliang Zhou
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Publication number: 20210079499Abstract: The invention relates to an austenitic alloy comprising the following elements in weight %: C ?0.03; Si ?1.0; 5 Mn ?1.5; S ?0.03; P ?0.03; Cr 25.0 to 33.0; Ni 42.0 to 52.0; 10 Mo 6.0 to 9.0; N 0.07-0.11; Cu ?0.4; Balance Fe and unavoidable impurities; and characterized in that the austenitic alloy fulfills the following condition: ENi>1.864*ECr?19.92 wherein ECr=[wt % Cr]+[wt % Mo]+1.5*[wt % Si] and ENi=[wt % Ni]+30*[wt % C]+30*[wt % N]+0.5*[wt % Mn]+0.5*[wt % Cu]. The invention also relates to a manufacturing method and an object comprising said alloy. The alloy and objects made thereof have less than 0.3% intermetallic phases after solidification.Type: ApplicationFiled: May 23, 2019Publication date: March 18, 2021Applicant: AB Sandvik Materials TechnologyInventors: Karin ANTONSSON, Ulf KIVISÄKK
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Publication number: 20200254419Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C ?0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10;? Mo 0-4.0; N 0.30-0.55;?? Cu 0-0.8; W 0-3.0; S ?0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.Type: ApplicationFiled: April 24, 2020Publication date: August 13, 2020Applicant: Stamicarbon B.V.Inventors: Linn LARSSON, Daniel GULLBERG, Ulf KIVISÄKK, Martin ÖSTLUND, Alexander Aleida Antonius SCHEERDER
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Patent number: 10710047Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C ?0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10;? Mo 0-4.0; N 0.30-0.55:? Cu 0-0.8; W 0-3.0; S ?0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.Type: GrantFiled: June 29, 2018Date of Patent: July 14, 2020Assignee: Stamicarbon B.V.Inventors: Linn Larsson, Daniel Gullberg, Ulf Kivisäkk, Martin Östlund, Alexander Aleida Antonius Scheerder
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Publication number: 20200024711Abstract: The present disclosure relates to a powder of an austenitic alloy and a HIP:ed object manufactured thereof and a process for the manufacturing the HIP:ed object and its use in corrosive environments.Type: ApplicationFiled: March 21, 2018Publication date: January 23, 2020Applicant: SANDVIK INTELLECTUAL PROPERTY ABInventors: Hans SÖDERBERG, Thomas BLOMFELDT, Ulf KIVISÄKK, Lars-Olov NORDBERG, Zhiliang ZHOU
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Publication number: 20190376156Abstract: The present disclosure relates to the use of a solution-annealed object comprising a duplex stainless steel, having the following composition in weight % (wt %): C less than or equal to 0.03; Si less than or equal to 0.5; Mn less than or equal to 1.0; Ni 5.0 to 7.0; Cr 22.0 to 26.0; Mo 2.5 to 4.5; N 0.1 to 0.2; P less than or equal to 0.03; S less than or equal to 0.03; Cu less than or equal to 0.3; Al less than or equal to 0.10; the balance being Fe and inevitable impurities; wherein the duplex stainless steel fulfills the equation of Cr+50N?35; and wherein the duplex stainless steel has a ferrite phase content in the range of from 40% to 60% by volume and an austenite phase content in the range of 40 to 60% by volume; in sea water applications.Type: ApplicationFiled: December 18, 2017Publication date: December 12, 2019Applicant: SANDVIK INTELLECTUAL PROPERTY ABInventor: Ulf KIVISÄKK
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Publication number: 20180304224Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C ?0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10;? Mo 0-4.0; N 0.30-0.55:? Cu 0-0.8; W 0-3.0; S ?0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.Type: ApplicationFiled: June 29, 2018Publication date: October 25, 2018Applicant: Stamicarbon B.V.Inventors: Linn LARSSON, Daniel GULLBERG, Ulf KIVISÄKK, Martin ÖSTLUND, Alexander Aleida Antonius SCHEERDER
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Patent number: 10046297Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C 0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10; Mo 0-4.0; N 0.30-0.55; Cu 0-0.8; W 0-3.0; S 0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.Type: GrantFiled: December 23, 2014Date of Patent: August 14, 2018Assignee: Stamicarbon B.V.Inventors: Linn Larsson, Daniel Gullberg, Ulf Kivisäkk, Martin Östlund, Alexander Aleida Antonius Scheerder
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Publication number: 20160325261Abstract: Disclosed is a Hot Isostatic Pressed ferritic-austenitic steel alloy, as well objects thereof. The elementary composition of the alloy comprises, in percentages by weight: C 0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10; Mo 0-4.0; N 0.30-0.55; Cu 0-0.8; W 0-3.0; S 0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. The objects can be particularly useful in making components for a urea production plant that require processing such as machining or drilling. A preferred use is in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.Type: ApplicationFiled: December 23, 2014Publication date: November 10, 2016Applicant: Stamicarbon B.V.Inventors: Linn LARSSON, Daniel GULLBERG, Ulf KIVISÄKK, Martin ÖSTLUND, Alexander Aleida Antonius SCHEERDER
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Publication number: 20160319405Abstract: The elementary composition of a Hot Isostatic Pressed ferritic-austenitic steel alloy includes, in percentages by weight: C 0-0.05; Si 0-0.8; Mn 0-4.0; Cr more than 29-35; Ni 3.0-10; Mo 0-4.0; N 0.30-0.55; Cu 0-0.8; W 0-3.0; S 0-0.03; Ce 0-0.2; the balance being Fe and unavoidable impurities. Objects of the alloy can be useful in making components for a urea production plant that require processing such as machining or drilling, for example, in making, or replacing, liquid distributors as used in a stripper as is typically present in the high-pressure synthesis section of a urea plant.Type: ApplicationFiled: December 23, 2014Publication date: November 3, 2016Inventors: Linn LARSSON, Daniel GULLBERG, Ulf KIVISÄKK, Martin ÖSTLUND, Alexander Aleida Antonius SCHEERDER
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Publication number: 20100084121Abstract: The present invention relates to a plate of a plate heat exchanger, said plate comprising a material which constitutes a part of said plate with a surface made of this material positioned to be in direct contact with a chloride-containing cooling liquid, such as sea water, in which the material is a duplex stainless steel alloy containing in weight-%: C max 0.06%, Si max 1.5%, Mn 0-3.0%, Cr 23.0-32.0%, Ni 4.9-10.0%, Mo 3.0-8.0%, N 0.15-0.5%, B 0.-0.010%, S max 0.030%, Co 0-3.5%, W 0-3.0%, Cu 0-2.0%, Ru 0-0.3%, Al 0-0.2%, Ca 0-0.010% balance Fe and normal occurring impurities, wherein the ferrite content is 35-70 volume-%.Type: ApplicationFiled: December 13, 2007Publication date: April 8, 2010Applicant: Sandvik Intellectual Property ABInventors: Ulf Kivisäkk, Kenneth Göransson
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Patent number: 7081173Abstract: A super-austenitic stainless steel alloy with a composition, balanced in such a way that products made from the alloy fulfill high requirements on a combination of high corrosion resistance, especially in inorganic and organic acids and mixtures thereof, good general corrosion resistance, good structure stability as well as improved mechanical properties in combination with good workability, in particular in tubes, especially seamless tubes and seam welded tubes for application in these environments and with following composition, in weight-percent: Cr 23.0–30.0 Ni 25.0–35.0 Mo ?2.0–6.0 Mn ?1.0–6.0 N ??0–0.4 C up to 0.05 Si up to 1.0 S up to 0.02 Cu up to 3.0 W ??0–6.0 up to 2.0 of one or more element of the group Mg, Ce, Ca, B, La, Pr, Zr, Ti, Nd, and the balance being Fe and normally occurring impurities and steel making additions.Type: GrantFiled: November 22, 2002Date of Patent: July 25, 2006Assignee: Sandvik Intellectual Property ABInventors: Babak Bahar, Johan Frodigh, Pasi Kangas, Ulf Kivisäkk