Patents by Inventor Mikael Lagerquist
Mikael Lagerquist 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: 7727592Abstract: The present invention relates to a cutting insert particularly for turning of stainless steel comprising a cemented carbide substrate and a post-treated coating with a substrate of cemented carbide having a composition of from about 5.0 to less than about 8.0 wt % Co, from about 3.0 to about 8.0 wt % cubic carbides of the metals Ti, Ta and Nb with a Ti/(Ti+Ta+Nb) ratio of from about 0.05 to about 0.3 and balance tungsten carbide (WC) having a grain size of from about 1.5 to about 3.5 ?m in the as-sintered state. Further, the substrate has a surface zone of from about 5 to about 30 ?m characterized by an enrichment of binder phase and a depletion of cubic carbides, and a coating having a first, innermost layer system of one or several layers of TiCxNyOz with x+y+z?1 with a total thickness of from about 0.7 to about 5.Type: GrantFiled: May 29, 2008Date of Patent: June 1, 2010Assignee: Sandvik Intellectual Property ABInventors: Gunilla Cedergren, Mikael Lindholm, Ann-Britt Ljungberg, Mikael Lagerquist, Frida Cullin
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Publication number: 20080286462Abstract: The present invention relates to a cutting insert particularly for turning of stainless steel comprising a cemented carbide substrate and a post-treated coating with a substrate of cemented carbide having a composition of from about 5.0 to less than about 8.0 wt % Co, from about 3.0 to about 8.0 wt % cubic carbides of the metals Ti, Ta and Nb with a Ti/(Ti+Ta+Nb) ratio of from about 0.05 to about 0.3 and balance tungsten carbide (WC) having a grain size of from about 1.5 to about 3.5 ?m in the as-sintered state. Further, the substrate has a surface zone of from about 5 to about 30 ?m characterized by an enrichment of binder phase and a depletion of cubic carbides, and a coating having a first, innermost layer system of one or several layers of TiCxNyOz with x+y+z?1 with a total thickness of from about 0.7 to about 5.Type: ApplicationFiled: May 29, 2008Publication date: November 20, 2008Inventors: Gunilla Cedergren, Mikael Lindholm, Ann-Britt Ljungberg, Mikael Lagerquist, Frida Cullin
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Patent number: 7396371Abstract: The present invention relates to a cutting insert particularly for turning of stainless steel comprising a cemented carbide substrate and a post-treated coating with a substrate of cemented carbide having a composition of from about 5.0 to less than about 8.0 wt % Co, from about 3.0 to about 8.0 wt % cubic carbides of the metals Ti, Ta and Nb with a Ti/(Ti+Ta+Nb) ratio of from about 0.05 to about 0.3 and balance tungsten carbide (WC) having a grain size of from about 1.5 to about 3.5 ?m in the as-sintered state. Further, the substrate has a surface zone of from about 5 to about 30 ?m characterized by an enrichment of binder phase and a depletion of cubic carbides, and a coating having a first, innermost layer system of one or several layers of TiCxNyOz with x+y+z?1 with a total thickness of from about 0.7 to about 5.Type: GrantFiled: June 24, 2005Date of Patent: July 8, 2008Assignee: Sandvik Intellectual Property ABInventors: Gunilla Cedergren, Mikael Lindholm, Ann-Britt Ljungberg, Mikael Lagerquist, Frida Cullin
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Patent number: 7153562Abstract: The present invention relates to a cutting tool insert particularly for turning of steel comprising a cemented carbide body, a coating with a post treatment with a first, innermost layer system of one or several layers of TiCxNyOz with x+y+z?1 with a total thickness of 0.7–4.5 ?m a second multilayer system consisting of a totally 5–31 alternating Al2O3 and TiCxNyOz (x+y+z?1), preferably ?-Al2O3 and TiN, the Al2O3-layers having an individual layer thickness of <0.5 ?m and the TiCxNyOz-layers 0.01–0.2 ?m with a total thickness of the multilayer of 1.0–4.0 ?m. The multilayer is exposed along the edge line and into the rake and flank face, at least 0.02 mm, from the edge line on the rake face, preferably the contact length of the chip at most 0.9 mm, and 0.02–0.20 mm on the flank face.Type: GrantFiled: January 21, 2004Date of Patent: December 26, 2006Assignee: Sandvik Intellectual Property ABInventors: Markus Rodmar, Mikael Lindholm, Anders Jonsson, Gunilla Andersson, Anders Nordgren, Mikael Lagerquist
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Publication number: 20060019117Abstract: The present invention relates to a cutting insert particularly for turning of stainless steel comprising a cemented carbide substrate and a post-treated coating with a substrate of cemented carbide having a composition of from about 5.0 to less than about 8.0 wt % Co, from about 3.0 to about 8.0 wt % cubic carbides of the metals Ti, Ta and Nb with a Ti/(Ti+Ta+Nb) ratio of from about 0.05 to about 0.3 and balance tungsten carbide (WC) having a grain size of from about 1.5 to about 3.5 ?m in the as-sintered state. Further, the substrate has a surface zone of from about 5 to about 30 ?m characterized by an enrichment of binder phase and a depletion of cubic carbides, and a coating having a first, innermost layer system of one or several layers of TiCxNyOz with x+y+z?1 with a total thickness of from about 0.7 to about 5.Type: ApplicationFiled: June 24, 2005Publication date: January 26, 2006Applicant: Sandvik Intellectual Property HBInventors: Gunilla Cedergren, Mikael Lindholm, Ann-Britt Ljungberg, Mikael Lagerquist, Frida Cullin
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Publication number: 20040180241Abstract: The present invention relates to a cutting tool insert particularly for turning of steel comprising a cemented carbide body, a coating with a post treatment withType: ApplicationFiled: January 21, 2004Publication date: September 16, 2004Applicant: SANDVIK ABInventors: Markus Rodmar, Mikael Lindholm, Anders Jonsson, Gunilla Andersson, Anders Nordgren, Mikael Lagerquist
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Patent number: 5993970Abstract: The present invention discloses a method of sintering of cemented carbide or cermet bodies lying on graphite trays. By using graphite trays coated with a covering layer of Y.sub.2 O.sub.3 containing .ltoreq.20 wt-% ZrO.sub.2, or corresponding volumetric amount of other refractory oxides, e.g., Al.sub.2 O.sub.3 or combinations thereof, with an average thickness of .gtoreq.10 .mu.m, the life of the trays between regrindings and recoatings can be largely extended.Type: GrantFiled: April 14, 1997Date of Patent: November 30, 1999Assignee: Sandvik ABInventors: Ulf Oscarsson, Per Gustafson, Chris Chatfield, Mikael Lagerquist