Patents by Inventor Ola Bergman
Ola Bergman 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: 11554416Abstract: A method of making sintered components made from an iron-based powder composition and the sintered component per se. The method is especially suited for producing components which will be subjected to wear at elevated temperatures, consequently the components consists of a heat resistant stainless steel with hard phases including chromium carbo-nitrides. Examples of such components are parts in turbochargers for internal combustion engines.Type: GrantFiled: June 17, 2021Date of Patent: January 17, 2023Assignee: HÖGANÄS AB (PUBL)Inventors: Sven Allroth, Ola Bergman
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Patent number: 11179778Abstract: The present invention concerns a method of making sintered components made from an iron-based powder composition and the sintered component per se. The method is especially suited for producing components which will be subjected to wear at elevated temperatures, consequently the components consists of a heat resistant stainless steel with hard phases including chromium carbo-nitrides. Examples of such components are parts in turbochargers for internal combustion engines.Type: GrantFiled: December 15, 2014Date of Patent: November 23, 2021Assignee: HÖGANÄS AB (PUBL)Inventors: Sven Allroth, Ola Bergman
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Publication number: 20210316363Abstract: A method of making sintered components made from an iron-based powder composition and the sintered component per se. The method is especially suited for producing components which will be subjected to wear at elevated temperatures, consequently the components consists of a heat resistant stainless steel with hard phases including chromium carbo-nitrides. Examples of such components are parts in turbochargers for internal combustion engines.Type: ApplicationFiled: June 17, 2021Publication date: October 14, 2021Applicant: HÖGANÄS AB (PUBL)Inventors: Sven ALLROTH, Ola BERGMAN
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Patent number: 10702924Abstract: A material which can be used to manufacture components which exhibit high strength and high wear resistance, at the same time possessing reasonable ductility. The material also has cost advantages compared to other potential metal powder solutions. An iron based powder composition which achieves desired microstructure/properties and associated sliding wear resistance with reduced content of expensive alloying ingredients such as admixed elemental Ni and Copper.Type: GrantFiled: January 3, 2013Date of Patent: July 7, 2020Assignee: HÖGANÄS AB (PUBL)Inventors: Christophe Szabo, Senad Dizdar, Ola Bergman
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Patent number: 10465268Abstract: The present invention provides a low cost pre-alloyed iron based powder which has high compressibility, capable of rendering a compacted and sintered component high green density, (GD), and high sintered density, (SD). Also, a method or process for producing components, especially gears, including compaction of powder mixture containing the pre-alloyed iron-based powder, sintering of the compacted component, Low Pressure carburizing, (LPC), High Pressure Gas Quenching, (HPGQ), and tempering, is provided. In one embodiment, the process includes high temperature sintering. Other aspects of the present invention include a powder mixture containing the pre-alloyed iron based powder and components produced by the new process from the powder mixture. Such carburized components exhibit a hard surface combined with a softer and tougher core, necessary properties for e.g. automotive gears subjected to harsh environment.Type: GrantFiled: September 15, 2015Date of Patent: November 5, 2019Assignee: HÖGANÄS AB (PUBL)Inventor: Ola Bergman
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Publication number: 20170275740Abstract: The present invention provides a low cost pre-alloyed iron based powder which has high compressibility, capable of rendering a compacted and sintered component high green density, (GD), and high sintered density, (SD). Also, a method or process for producing components, especially gears, including compaction of powder mixture containing the pre-alloyed iron-based powder, sintering of the compacted component, Low Pressure carburizing, (LPC), High Pressure Gas Quenching, (HPGQ), and tempering, is provided. In one embodiment, the process includes high temperature sintering. Other aspects of the present invention include a powder mixture containing the pre-alloyed iron based powder and components produced by the new process from the powder mixture. Such carburized components exhibit a hard surface combined with a softer and tougher core, necessary properties for e.g. automotive gears subjected to harsh environment.Type: ApplicationFiled: September 15, 2015Publication date: September 28, 2017Applicant: Höganäs AB (publ)Inventor: Ola BERGMAN
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Publication number: 20160318103Abstract: The present invention concerns a method of making sintered components made from an iron-based powder composition and the sintered component per se. The method is especially suited for producing components which will be subjected to wear at elevated temperatures, consequently the components consists of a heat resistant stainless steel with hard phases including chromium carbo-nitrides. Examples of such components are parts in turbochargers for internal combustion engines.Type: ApplicationFiled: December 15, 2014Publication date: November 3, 2016Applicant: HÖGANÄ AB (PUBL)Inventors: Sven ALLROTH, Ola BERGMAN
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Publication number: 20160258044Abstract: A water atomized pre-alloyed iron-based steel powder which includes by weight-%: 0.4-2.0 Cr, 0.1-0.8 Mn, less than 0.1 V, less than 0.1 Mo, less than 0.1 Ni, less than 0.2 Cu, less than 0.1 C, less than 0.25 O, less than 0.5 of unavoidable impurities, and the balance being iron.Type: ApplicationFiled: May 16, 2016Publication date: September 8, 2016Applicant: HOGANAS AB (PUBL)Inventors: Ola LITSTRÖM, Sven BENGTSSON, Robert FRYKHOLM, Ola Bergman
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Publication number: 20150093280Abstract: A material which can be used to manufacture components which exhibit high strength and high wear resistance, at the same time possessing reasonable ductility. The material also has cost advantages compared to other potential metal powder solutions. An iron based powder composition which achieves desired microstructure/properties and associated sliding wear resistance with reduced content of expensive alloying ingredients such as admixed elemental Ni and Copper.Type: ApplicationFiled: January 3, 2013Publication date: April 2, 2015Inventors: Christophe Szabo, Senad Dizdar, Ola Bergman
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Patent number: 8231702Abstract: An annealed prealloyed water atomised iron-based powder is provided which is suitable for the production of pressed and sintered components having high wear resistance. The iron-based powder comprises 15-30% by weight of Cr, 0.5-5% by weight of each of at least one of Mo, W and V, and 0.5-2%, preferably 0.7-2% and most preferably 1-2% by weight of C. The powder has a matrix comprising less than 10% by weight of Cr, and comprises large chromium carbides. A method for production of the iron-based powder also is provided.Type: GrantFiled: September 20, 2007Date of Patent: July 31, 2012Assignee: Hoganas AB (Publ)Inventors: Ola Bergman, Paul Dudfield Nurthen
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Patent number: 8110020Abstract: An annealed pre-alloyed water atomised iron-based powder suitable for the production of pressed and sintered components having high wear resistance is provided. The iron-based powder comprises 10-below 18% by weight of Cr, 0.5-5% by weight of each of at least one of Mo, W, V and Nb, and 0.5-2%, preferably 0.7-2% and most preferably 1-2% by weight of C. The powder has a matrix comprising less than 10% by weight of Cr, and comprises large M23C6-type carbides in combination with M7C3-type carbides. A method for production of the iron-based powder, a method for producing a pressed and sintered component having high wear resistance, and a component having high wear resistance are provided.Type: GrantFiled: September 24, 2008Date of Patent: February 7, 2012Assignee: Höganäs AB (PUBL)Inventors: Ola Bergman, Paul Dudfield Nurthen
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Patent number: 7918915Abstract: The present invention relates to a wear resistant iron-based powder, suitable for the production of pressed and sintered components, comprising 10-20% by weight of Cr, 0.5-5% by weight of Mo and 1-2% by weight of C. The powder is characterised in that it includes pre-alloyed water atomized iron-based powder particles and chromium carbide particles diffusion bonded onto said pre-alloyed powder particles. The invention also relates to a method of producing this powder.Type: GrantFiled: September 18, 2007Date of Patent: April 5, 2011Assignee: Höganäs ABInventors: Ola Bergman, Paul Nurthen
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Publication number: 20100316521Abstract: A water atomised prealloyed iron-based steel powder is provided which comprises by weight-%: 0.4-2.0 Cr, 0.1-0.8 Mn, less than 0.1 V, less than 0.1 Mo, less than 0.1 Ni, less than 0.2 Cu, less than 0.1 C, less than 0.25 O, less than 0.5 of unavoidable impurities, and the balance being iron.Type: ApplicationFiled: December 18, 2008Publication date: December 16, 2010Applicant: HOGANAS AB (PUBL)Inventors: Ola Litström, Sven Bengtsson, Robert Frykholm, Ola Bergman
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Publication number: 20100206129Abstract: An annealed pre-alloyed water atomised iron-based powder suitable for the production of pressed and sintered components having high wear resistance is provided. The iron-based powder comprises 10-below 18% by weight of Cr, 0.5-5% by weight of each of at least one of Mo, W, V and Nb, and 0.5-2%, preferably 0.7-2% and most preferably 1-2% by weight of C. The powder has a matrix comprising less than 10% by weight of Cr, and comprises large M23C6-type carbides in combination with M7C3-type carbides. A method for production of the iron-based powder, a method for producing a pressed and sintered component having high wear resistance, and a component having high wear resistance are provided.Type: ApplicationFiled: September 24, 2008Publication date: August 19, 2010Applicant: HOGANAS AB (PUBL)Inventors: Ola Bergman, Paul Dudfield Nurthen
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Publication number: 20090252639Abstract: An annealed prealloyed water atomised iron-based powder is provided which is suitable for the production of pressed and sintered components having high wear resistance. The iron-based powder comprises 15-30% by weight of Cr, 0.5-5% by weight of each of at least one of Mo, W and V, and 0.5-2%, preferably 0.7-2% and most preferably 1-2% by weight of C. The powder has a matrix comprising less than 10% by weight of Cr, and comprises large chromium carbides. A method for production of the iron-based powder also is provided.Type: ApplicationFiled: September 20, 2007Publication date: October 8, 2009Applicant: HÖGANÄS AB (PUBL)Inventors: Ola Bergman, Paul Dudfield Nurthen
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Patent number: 7473295Abstract: The invention concerns a stainless steel powder comprising at least 10% chromium by weight. The powder further comprises vanadium in an amount of at least 4 times the amount of carbon and nitrogen. Preferably the steel powder comprises 10-30% chromium, 0.1-1% vanadium, 0.5-1.5% silicon, at least 0.1% carbon and at least 0.07% nitrogen. The invention also concerns a powder metallurgical composition containing said steel powder, a process for preparing and a compacted and sintered part made of said composition.Type: GrantFiled: July 1, 2005Date of Patent: January 6, 2009Assignee: Höganäs ABInventors: Owe Mårs, Ricardo Canto Leyton, Ola Bergman
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Publication number: 20080075968Abstract: The present invention relates to a wear resistant iron-based powder, suitable for the production of pressed and sintered components, comprising 10-20% by weight of Cr, 0.5-5% by weight of Mo and 1-2% by weight of C. The powder is characterised in that it includes pre-alloyed water atomised iron-based powder particles and chromium carbide particles diffusion bonded onto said pre-alloyed powder particles. The invention also relates to a method of producing this powder.Type: ApplicationFiled: September 18, 2007Publication date: March 27, 2008Applicant: Hoganas ABInventors: Ola Bergman, Paul Nurthen
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Publication number: 20060002813Abstract: The invention concerns a stainless steel powder comprising at least 10% chromium by weight. The powder further comprises vanadium in an amount of at least 4 times the amount of carbon and nitrogen. Preferably the steel powder comprises 10-30% chromium, 0.1-1% vanadium, 0.5-1.5% silicon, at least 0.1% carbon and at least 0.07% nitrogen. The invention also concerns a powder metallurgical composition containing said steel powder, a process for preparing and a compacted and sintered part made of said composition.Type: ApplicationFiled: July 1, 2005Publication date: January 5, 2006Applicant: HOGANAS ABInventors: Owe Mars, Ricardo Leyton, Ola Bergman
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Patent number: 4323728Abstract: There is disclosed a conversion circuit arrangement for switching digital data signals between data terminals operating with different data transmission procedures. The circuit arrangement adapted for use with an electronic data switching system is composed of at least two interface circuits having input/output converting networks. External terminals of these interface circuits are connected to respective input/output means of the switching system for each type of data terminal. Internal input/output terminals of the interface circuits are connected to respective terminals of a storage unit. There is provided a control unit for controlling data transmission between the interface circuits and the storage unit and vice versa such that messages are buffered in the storage unit. The stored message is converted according to the data transmission procedure of the receiving data terminal.Type: GrantFiled: March 10, 1980Date of Patent: April 6, 1982Assignee: Siemens AktiengesellschaftInventors: Ola Bergman, Rolf Hagen, Juergen Harenberg, Herbert Steiner
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Patent number: 4307265Abstract: A circuit arrangement is provided for the transmission of digital signals between transmitting and/or receiving stations which operate with differing data transmission procedures and with different data formats. The signal transmission respectively occurs by way of a converter unit which, like the transmitting and receiving installations, is connected to a switching system. In the train of the transmission of digital signals from a transmitting installation operating with a lower data transmission rate to a receiving installation operating with a higher data transmission rate, the digital signals emitted by the appertaining transmitting installation are first collected in the converter unit in order to be emitted to the appertaining receiving installation only given the existence of a sufficient plurality of such signals.Type: GrantFiled: September 9, 1980Date of Patent: December 22, 1981Assignee: Siemens AktiengesellschaftInventors: Rolf Hagen, Ola Bergman, Juergen Harenberg, Herbert Steiner