Patents by Inventor Marian Mikus
Marian Mikus 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: 7799443Abstract: A cutting tool insert has a cermet body with a Co and/or Ni binder phase and a coating deposited as monolayer or as multiple and/or alternating layers of carbide, nitride or oxide. The coating has a thickness of 21-50 ?m, when the inserts have a flat rake face, without or with simple chipbreakers and a Co binder phase, or has a thickness of 10-50 ?m, when the inserts have a rake face land with a width of 100-300 ?m with an angle of 10-25° to the rake face and a Co and/or Ni binder phase. The cermet body has more than 50 vol. % Ti-based carbonitride and less than 15 wt % and more than 6 wt % Co and/or Ni binder phase and a hardness of >1650 HV3. The disclosure also relates to the use of the coated cutting tool insert for the machining of cast iron work pieces.Type: GrantFiled: February 28, 2007Date of Patent: September 21, 2010Assignee: Sandvik Intellectual Property ABInventors: Marian Mikus, Kenneth Westergren, Leif Åkesson, Per Mårtensson
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Patent number: 7700186Abstract: According to the present invention there is now provided a body cemented carbide provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC—Co cemented carbides.Type: GrantFiled: March 27, 2008Date of Patent: April 20, 2010Assignee: Sandvik Intellectual Property AktiebolagInventor: Marian Mikus
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Publication number: 20080224344Abstract: The present invention relates to a method of making a cemented carbide body. The body is made using conventional powder metallurgical methods such as milling, pressing and sintering. According to the invention, a combined sintering process is used comprising at least a sequence where the batch of bodies in the sintering furnace is heated to a sintering temperature at least above the melting point of the binder phase. The batch of bodies in the sintering furnace is then allowed to cool down to a temperature at least below the melting point of the binder phase and kept there for at least from about 1 but preferably less than about 30 minutes and then heated up again to a sintering temperature at least above the binder phase melting point. The present invention also relates to a cemented carbide body made according to the method.Type: ApplicationFiled: March 12, 2008Publication date: September 18, 2008Inventors: Kenneth Westergren, Marian Mikus, Leif Akesson
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Publication number: 20080210064Abstract: A cutting tool insert has a cermet body with a Co and/or Ni binder phase and a coating deposited as monolayer or as multiple and/or alternating layers of carbide, nitride or oxide. The coating has a thickness of 21-50 ?m, when the inserts have a flat rake face, without or with simple chipbreakers and a Co binder phase, or has a thickness of 10-50 ?m, when the inserts have a rake face land with a width of 100-300 ?m with an angle of 10-25° to the rake face and a Co and/or Ni binder phase. The cermet body has more than 50 vol. % Ti-based carbonitride and less than 15 wt % and more than 6 wt % Co and/or Ni binder phase and a hardness of >1650 HV3. The disclosure also relates to the use of the coated cutting tool insert for the machining of cast iron work pieces.Type: ApplicationFiled: February 28, 2007Publication date: September 4, 2008Inventors: Marian Mikus, Kenneth Westergren, Leif Akesson, Per Martensson
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Patent number: 7416778Abstract: The present invention relates to a method of machining a metal work piece with a coated cutting tool insert having a cemented carbide body and a coating deposited as monolayer(s) or as multiple and/or alternating layers. The coating has a total thickness of from about 25 to about 75 ?m and the machining is performed at a cutting speed of greater than about 600 m/min, preferably from about 800 to about 1500 m/min. The invention also relates to a coated cutting tool useful for such machining operation.Type: GrantFiled: October 3, 2005Date of Patent: August 26, 2008Assignee: Sandvik Intellectual Property ABInventors: Kenneth Westergren, Marian Mikus, Leif Åkesson
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Publication number: 20080187778Abstract: According to the present invention there is now provided a body cemented carbide provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC-Co cemented carbides.Type: ApplicationFiled: March 27, 2008Publication date: August 7, 2008Inventor: Marian Mikus
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Patent number: 7384689Abstract: According to the present invention there is now provided a body cemented carbide provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC—Co cemented carbides.Type: GrantFiled: September 27, 2006Date of Patent: June 10, 2008Assignee: Sandvik Intellectual Property ABInventor: Marian Mikus
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Publication number: 20080070046Abstract: The present invention relates to a method of machining a metal workpiece with a coated cutting tool insert comprising a cemented carbide body and a coating deposited as monolayer(s) or as multiple and/or alternating layers. The coating has a total thickness of 25-75 ?m and the machining is performed at a cutting speed of >600 m/min, preferably 800-1500 m/min. The invention also relates to a coated cutting tool useful for such machining operation.Type: ApplicationFiled: October 3, 2005Publication date: March 20, 2008Inventors: Kenneth Westergren, Marian Mikus, Leif Akesson
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Publication number: 20070020477Abstract: According to the present invention there is now provided a body cemented carbide provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC?Co cemented carbides.Type: ApplicationFiled: September 27, 2006Publication date: January 25, 2007Inventor: Marian Mikus
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Patent number: 7150897Abstract: According to the present invention there is now provided a cemented carbide body provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC—Co cemented carbides. A method for making such bodies is also disclosed.Type: GrantFiled: November 23, 2001Date of Patent: December 19, 2006Assignee: Sandvik Intellectual Property ABInventor: Marian Mikus
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Patent number: 6767583Abstract: Coated milling insert has a WC—Co cemented carbide with a low content of cubic carbides and a highly W-alloyed binder phase and a coating including an inner layer of TiCxNy with columnar grains followed by a layer of &kgr;-Al2O3 and a top layer of TiN. The coated milling insert is particularly useful for milling of grey cast iron with or without cast skin under wet conditions at low and moderate cutting speeds and milling of nodular cast iron and compacted graphite iron with or without cast skin under wet conditions at moderate cutting speeds.Type: GrantFiled: August 13, 2003Date of Patent: July 27, 2004Assignee: Sandvik AktiebolagInventors: Anders Nordgren, Ingemar Hessman, Marian Mikus
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Publication number: 20040091749Abstract: According to the present invention there is now provided a body cemented carbide provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC−Co cemented carbides.Type: ApplicationFiled: December 8, 2003Publication date: May 13, 2004Inventor: Marian Mikus
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Patent number: 6706327Abstract: A method of making a cemented carbide body having WC with an average grain size of 0.5-4 &mgr;m, 3.5-9 wt % Co and <2 wt % carbides of Ta, Ti and Nb, and with a substoichiometric carbon content, the method including sintering the body such that an eta phase containing structure is obtained with a size of 1-15 &mgr;m and a content of 10 vol. %-35 vol. %, and subjecting the body to recarburization such that the eta phase in a 50-350 &mgr;m wide intermediate zone is transformed to WC+Co without essentially changing its Co-content.Type: GrantFiled: October 11, 2001Date of Patent: March 16, 2004Assignee: Sandvik ABInventors: Per Blomstedt, Mikael Lagerqvist, Marian Mikus
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Publication number: 20040033393Abstract: Coated milling insert has a WC-Co cemented carbide with a low content of cubic carbides and a highly W-alloyed binder phase and a coating including an inner layer of TiCxNy with columnar grains followed by a layer of &kgr;-Al2O3 and a top layer of TiN. The coated milling insert is particularly useful for milling of grey cast iron with or without cast skin under wet conditions at low and moderate cutting speeds and milling of nodular cast iron and compacted graphite iron with or without cast skin under wet conditions at moderate cutting speeds.Type: ApplicationFiled: August 13, 2003Publication date: February 19, 2004Applicant: SANDVIK AB.Inventors: Anders Nordgren, Ingemar Hessman, Marian Mikus
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Patent number: 6638609Abstract: Coated milling insert has a WC-Co cemented carbide with a low content of cubic carbides and a highly W-alloyed binder phase and a coating including an inner layer of TiCxNy with columnar grains followed by a layer of &kgr;-Al2O3 and a top layer of TiN. The coated milling insert is particularly useful for milling of grey cast iron with or without cast skin under wet conditions at low and moderate cutting speeds and milling of nodular cast iron and compacted graphite iron with or without cast skin under wet conditions at moderate cutting speeds.Type: GrantFiled: October 29, 2001Date of Patent: October 28, 2003Assignee: Sandvik AktiebolagInventors: Anders Nordgren, Ingemar Hessman, Marian Mikus
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Patent number: 6447912Abstract: According to the present invention there is now provided a body of cemented carbide provided with at least one wear resistant layer, which body contains a zone in the cemented carbide and adjacent to the applied layer, containing triangular WC platelets with a specific orientation. Different binder phase gradients are possible. The body is in particular suited for application of CVD diamond layers.Type: GrantFiled: August 24, 2000Date of Patent: September 10, 2002Assignee: Sandvik ABInventors: Marian Mikus, Ingrid Reineck
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Publication number: 20020081432Abstract: Coated milling insert has a WC-Co cemented carbide with a low content of cubic carbides and a highly W-alloyed binder phase and a coating including an inner layer of TiCxNy with columnar grains followed by a layer of &kgr;-Al2O3 and a top layer of TiN. The coated milling insert is particularly useful for milling of grey cast iron with or without cast skin under wet conditions at low and moderate cutting speeds and milling of nodular cast iron and compacted graphite iron with or without cast skin under wet conditions at moderate cutting speeds.Type: ApplicationFiled: October 29, 2001Publication date: June 27, 2002Inventors: Anders Nordgren, Ingemar Hessman, Marian Mikus
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Publication number: 20020051886Abstract: The present invention relates to a coated body such as a cutting tool insert comprising a wear resistant coating and a cemented carbide body particularly useful for the machining of cast iron parts by turning, milling or drilling at high speeds. The cemented carbide body consists of WC, 3.5-9 wt-% Co and <2 wt-% carbides of Ta, Ti and Nb. It has a core containing finely distributed eta phase islands and an intermediate zone 50-250 &mgr;m thick essentially free of eta phase and with nominal Co content whereby the binder phase in the intermediate zone is present as smaller original islands and larger islands transformed from original eta phase. These latter Co-islands therefore have a size and distribution essentially the same as that of the eta phase in the core. There may be present a thin surface zone free of eta phase with a Co content lower than the nominal Co-content.Type: ApplicationFiled: October 11, 2001Publication date: May 2, 2002Inventors: Per Blomstedt, Mikael Lagerqvist, Marian Mikus
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Patent number: RE39912Abstract: Coated milling insert has a WC-Co cemented carbide with a low content of cubic carbides and a highly W-alloyed binder phase and a coating including an inner layer of TiCxNy with columnar grains followed by a layer of ?-Al2O3 and a top layer of TiN. The coated milling insert is particularly useful for milling of grey cast iron with or without cast skin under wet conditions at low and moderate cutting speeds and milling of nodular cast iron and compacted graphite iron with or without cast skin under wet conditions at moderate cutting speeds.Type: GrantFiled: June 9, 2006Date of Patent: November 6, 2007Assignee: Sandvik Intellectual Property ABInventors: Anders Nordgren, Ingemar Hessman, Marian Mikus
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Patent number: RE40082Abstract: Coated milling insert has a WC—Co cemented carbide with a low content of cubic carbides and a highly W-alloyed binder phase and a coating including an inner layer of TiCxNy with columnar grains followed by a layer of ?-Al2O3 and a top layer of TiN. The coated milling insert is particularly useful for milling of grey cast iron with or without cast skin under wet conditions at low and moderate cutting speeds and milling of nodular cast iron and compacted graphite iron with or without cast skin under wet conditions at moderate cutting speeds.Type: GrantFiled: June 8, 2006Date of Patent: February 19, 2008Assignee: Sandvik Intellectual Property ABInventors: Anders Nordgren, Ingemar Hessman, Marian Mikus