Patents by Inventor Erik HOLMSTROM
Erik HOLMSTROM 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: 12370605Abstract: A cutting tool includes a cemented carbide substrate. The cemented carbide consists of hard constituents in a metallic binder. The hard constituents include WC. The WC content in the cemented carbide is 80-93 wt %. The cemented carbide has Ni and Al, and a Ni content of 3-13 wt %, a weight ratio of Co/Ni<0.33, a weight ratio of Fe/Ni<0.25, a weight ratio of Cr/Ni<0.25 and a weight ratio of 0.02<Al/(Ni+Co+Fe)<0.1. The crack resistance W is defined as the ratio of the load applied on a Vickers hardness indentation and the total crack length of the cracks formed at the corners of the Vickers hardness indentation. The product of the hardness H(rake) at the rake face and the crack resistance W(rake) at the rake face is H(rake)*W(rake)>5000 HV100*N/?m.Type: GrantFiled: December 17, 2020Date of Patent: July 29, 2025Assignee: AB Sandvik CoromantInventors: Andreas Blomqvist, Jose Luis Garcia, Erik Holmstrom
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Patent number: 12365970Abstract: A coated cutting tool has a CVD coated and a substrate of a cemented carbide, wherein the metallic binder in the cemented carbide includes Ni. The CVD coating has an inner layer of TiN and a subsequent layer of TiCN. The C-activity relative to graphite in the metallic binder is lower than 0.15 and an average d electron value of the metallic binder is 7.00-7.43, wherein an interface between the substrate and the inner TiN layer is free of Ti-containing intermetallic phase.Type: GrantFiled: November 22, 2021Date of Patent: July 22, 2025Assignee: AB Sandvik CoromantInventors: Linus Von Fieandt, Raluca Brenning, Jan Engqvist, Andreas Blomqvist, Erik Holmstrom
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Patent number: 12358055Abstract: A coated cutting tool has a CVD coating and a substrate of a cemented carbide, wherein the metallic binder in the cemented carbide includes Ni. The CVD coating has an inner layer of TiN and a subsequent layer of TiCN. A C-activity relative to graphite in the metallic binder is lower than 0.15 and an average d electron value of the metallic binder is 7.00-7.43, wherein an interface between the substrate and the inner TiN layer is free of Ti-containing intermetallic phase.Type: GrantFiled: November 22, 2021Date of Patent: July 15, 2025Assignee: AB Sandvik CoromantInventors: Linus Von Fieandt, Raluca Brenning, Jan Engqvist, Andreas Blomqvist, Erik Holmstrom
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Publication number: 20240307960Abstract: A cutting tool includes a supporting body and a cBN or PCD cutting edge tip attached to the supporting body via a 5-150 ?m braze joint. The supporting body is cemented carbide having 3-25 wt % of a metallic binder, optionally up to 25 wt % of carbides or carbonitrides of one or more elements of group 4, 5, or 6, and the rest WC. The metallic binder includes at least 40 wt % Ni, and the braze joint has, in the order from the supporting body, a first layer of TiC situated next thereto, with an average thickness of 10-400 nm, a second layer, with an average thickness of 0.5-8 ?m, having in average at least 5 wt % metallic Ni, in average 25-60 wt % metallic Cu and in average 15-45 wt % metallic Ti, and a third layer, with an average thickness of 4-145 ?m, having metallic Ag and metallic Cu.Type: ApplicationFiled: December 20, 2021Publication date: September 19, 2024Inventors: Jose Luis GARCIA, Leif DAHL, Johnny BRUHN, Erik HOLMSTROM
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Patent number: 11898213Abstract: A method of treating a sintered mining insert including cemented carbide includes the step of subjecting the mining insert to a surface hardening process. The surface hardening process is executed at an elevated temperature of or above 100° C. A mining insert is also provided, wherein the HV1 Vickers hardness measurement increase (HV1%) from the surface region, measured as an average of HV1 measurements taken at 100 ?m, 200 ?m and 300 ?m below the surface, compared to the HV1 Vickers hardness measured in the bulk (HV1bulk), is at least 8.05-0.00350×HV1bulk.Type: GrantFiled: December 18, 2020Date of Patent: February 13, 2024Assignees: AB Sandvik Coromant, Sandvik Mining and Construction Tools ABInventors: Ioannis Arvanitidis, Andreas Blomqvist, Jose Luis Garcia, Erik Holmstrom, Mirjam Lilja
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Publication number: 20240033829Abstract: A coated cutting tool has a CVD coating and a substrate of a cemented carbide, wherein the metallic binder in the cemented carbide includes Ni. The CVD coating has an inner layer of TiN and a subsequent layer of TiCN. A C-activity relative to graphite in the metallic binder is lower than 0.15 and an average d electron value of the metallic binder is 7.00-7.43, wherein an interface between the substrate and the inner TiN layer is free of Ti-containing intermetallic phase.Type: ApplicationFiled: November 22, 2021Publication date: February 1, 2024Inventors: Linus VON FIEANDT, Raluca BRENNING, Jan ENGQVIST, Andreas BLOMQVIST, Erik HOLMSTROM
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Publication number: 20240026500Abstract: A coated cutting tool has a CVD coated and a substrate of a cemented carbide, wherein the metallic binder in the cemented carbide includes Ni. The CVD coating has an inner layer of TiN and a subsequent layer of TiCN. The C-activity relative to graphite in the metallic binder is lower than 0.15 and an average d electron value of the metallic binder is 7.00-7.43, wherein an interface between the substrate and the inner TiN layer is free of Ti-containing intermetallic phase.Type: ApplicationFiled: November 22, 2021Publication date: January 25, 2024Inventors: Linus VON FIEANDT, Raluca BRENNING, Jan ENGQVIST, Andreas BLOMQVIST, Erik HOLMSTROM
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Publication number: 20240001719Abstract: A tire stud made of a cemented carbide including at least 50 wt % WC and a metal binder in the amount between 3 and 25 wt % is provided. The metal binder includes at least 30 wt % Ni and less than 50 wt % Co. The use of such tire studs leads to less wear of the road surface.Type: ApplicationFiled: October 20, 2021Publication date: January 4, 2024Inventors: Erik HOLMSTROM, Ulf OLOFSSON
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Publication number: 20230184110Abstract: A method of redistributing the binder phase of a cemented carbide mining insert having a WC hard-phase component, optionally one or more further hard-phase components and a binder includes the steps of providing a green cemented carbide mining insert; applying at least one binder puller selected from a metal oxide or a metal carbonate to only at least one local area of the surface of the green cemented carbide insert; sintering the green carbide mining insert to form a sintered cemented carbide insert; and subjecting the sintered cemented carbide insert to dry tumbling process executed at an elevated temperature of or above 100° C., preferably at a temperature of or above 200° C., more preferably at a temperature of between 200° C. and 450° C.Type: ApplicationFiled: May 12, 2021Publication date: June 15, 2023Inventors: Mirjam LILJA, Jose Luis GARCIA, Andreas BLOMQVIST, Ioannis ARVANITIDIS, Erik HOLMSTROM
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Publication number: 20230040103Abstract: A cutting tool includes a substrate of cemented carbide having hard constituents in a metallic binder. The hard constituents include WC. The WC content in the cemented carbide is 80-95 wt %. The cemented carbide has a Fe+Ni+Co+Cr content of 3-13 wt %, an atomic ratio of 0.05<Fe/(Fe+Ni+Co+Cr)<0.35, an atomic ratio of 0.05<Ni/(Fe+Ni+Co+Cr)<0.35, an atomic ratio of 0.05<Co/(Fe+Ni+Co+Cr)<0.35 and an atomic ratio of 0.05<Cr/(Fe+Ni+Co+Cr)<0.35. The crack resistance W measured on the rake face of the cutting tool is at least 25% higher than the W measured on a cross section of the bulk area of the cutting tool.Type: ApplicationFiled: December 17, 2020Publication date: February 9, 2023Inventors: Andreas BLOMQVIST, Jose Luis GARCIA, Erik HOLMSTROM
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Publication number: 20230037384Abstract: A cutting tool includes a cemented carbide substrate. The cemented carbide consists of hard constituents in a metallic binder. The hard constituents include WC. The WC content in the cemented carbide is 80-93 wt %. The cemented carbide has Ni and Al, and a Ni content of 3-13 wt %, a weight ratio of Co/Ni<0.33, a weight ratio of Fe/Ni<0.25, a weight ratio of Cr/Ni<0.25 and a weight ratio of 0.02<Al/(Ni+Co+Fe)<0.1. The crack resistance W is defined as the ratio of the load applied on a Vickers hardness indentation and the total crack length of the cracks formed at the corners of the Vickers hardness indentation. The product of the hardness H(rake) at the rake face and the crack resistance W(rake) at the rake face is H(rake)*W(rake)>5000 HV100*N/?m.Type: ApplicationFiled: December 17, 2020Publication date: February 9, 2023Inventors: Andreas BLOMQVIST, Jose Luis GARCIA, Erik HOLMSTROM
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Publication number: 20230037096Abstract: A cutting tool includes a substrate of cemented carbide including hard constituents in a metallic binder. The hard constituents includes WC and the WC content in the cemented carbide is 80-96 wt%. The cemented carbide has a Ni content of 2.5-13 wt%, a weight ratio of Fe / Ni < 1.5 and a weight ratio of Co / Ni < 0.825. The cutting tool includes a rake face, a flank face and a cutting edge there between, wherein the hardness H is measured with Vickers indentation and the crack resistance W is the ratio of the load to the total crack lengths of the cracks in the corners of said Vickers indentation. The product of the hardness at the rake face H(rake) and the crack resistance at the rake face W(rake) for the cutting tool is H(rake)*W(rake) > 2000 HV100*N/µm.Type: ApplicationFiled: December 17, 2020Publication date: February 2, 2023Inventors: Andreas BLOMQVIST, Jose Luis GARCIA, Erik HOLMSTROM
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Publication number: 20230036990Abstract: A method of treating a sintered mining insert including cemented carbide includes the step of subjecting the mining insert to a surface hardening process. The surface hardening process is executed at an elevated temperature of or above 100° C. A mining insert is also provided, wherein the HV1 Vickers hardness measurement increase (HV1%) from the surface region, measured as an average of HV1 measurements taken at 100 ?m, 200 ?m and 300 ?m below the surface, compared to the HV1 Vickers hardness measured in the bulk (HV1bulk), is at least 8.05-0.00350×HV1bulk.Type: ApplicationFiled: December 18, 2020Publication date: February 2, 2023Inventors: Ioannis ARVANITIDIS, Andreas BLOMQVIST, Jose Luis GARCIA, Erik HOLMSTROM, Mirjam LILJA
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Patent number: 11213892Abstract: The present disclosure relates to a cutting tool including a cemented carbide substrate having WC, gamma phase and a binder phase. The substrate is provided with a binder phase enriched surface zone, which is depleted of gamma phase, wherein no graphite and no ETA phase is present in the microstructure and wherein the binder phase is a high entropy alloy.Type: GrantFiled: February 28, 2017Date of Patent: January 4, 2022Assignee: SANDVIK INTELLECTUAL PROPERTY ABInventors: Susanne Norgren, Erik Holmstrom, David Linder
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Publication number: 20210197288Abstract: The present disclosure relates to a cutting tool including a cemented carbide substrate having WC, gamma phase and a binder phase. The substrate is provided with a binder phase enriched surface zone, which is depleted of gamma phase, wherein no graphite and no ETA phase is present in the microstructure and wherein the binder phase is a high entropy alloy.Type: ApplicationFiled: February 28, 2017Publication date: July 1, 2021Inventors: Susanne NORGREN, Erik HOLMSTROM, David LINDER
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Publication number: 20210114116Abstract: The present disclosure relates to a method of treating a cutting tool of a cemented carbide or cermet substrate, wherein the cutting tool is subjected to shot peening at a temperature of or above 100° C. The cutting tool typically has a rake face, a flank face and a cutting edge extending therebetween. The shot peening is performed at least on the rake face of the cutting tool. The present disclosure also relates to a cutting tool treated with the method.Type: ApplicationFiled: June 28, 2019Publication date: April 22, 2021Inventors: Andreas BLOMQVIST, Erik HOLMSTROM, Jose Luis GARCIA