Abstract: The present invention relates to a wear resistant coating suitable to be deposited on cutting tool inserts for chip forming metal machining. The coating comprises at least two layers with different grain size, but with essentially the same composition. The coating is deposited by Physical Vapor Deposition (PVD).

Abstract: A method for depositing a hard and wear resistant layer onto a tool body of a hard alloy of, for example, cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel, includes depositing the layer by highly ionised physical vapour deposition using elemental, composite and/or alloyed source material comprising the elements Me, where Me is one or more of Ti, V, Cr, Y, Zr, Nb, Mo, Hf, Ta, W, B, Al, and Si, using a process gas o one or more of the elements C, N, O, and S, and applying a first substrate bias potential, Ub1, where ?900 V<Ub1<?300 V, during at least one fraction, Dhi, i=1, 2, 3, . . . , of the total layer deposition time, Dtot, where Dhi>0.05Dtot, and applying a second substrate bias potential, Ub2, where 150 V<Ub2<0 V, during at least one fraction, Dli, i=1, 2, 3, . . . , of the total deposition time, Dtot.

Abstract: A wear resistant coating suitable to be deposited on cutting tool inserts for chip forming metal machining, includes at least two layers with different grain size, but with essentially the same composition. The coating is deposited by Physical Vapor Deposition (PVD).

Abstract: A method of making cutting tool inserts with high demands on dimensional accuracy includes: mixing by milling of powders forming hard constituents and binder phase, forming the powder mixture to bodies of desired shape, sintering the formed bodies, grinding with high accuracy the sintered bodies to inserts with desired shape and dimension, optionally edge rounding of cutting edges, and providing the ground inserts with a wear resistant non-diamond or non-diamond-like coating. According to the method, the ground inserts are heat treated prior to the coating operation in an inert atmosphere or vacuum or other protective atmosphere below the solidus of the binder phase for such a time that the micro structure of the surface region is restructured without causing significant dimensional changes. In this way inserts with unexpected improvement of tool life and dimensional accuracy have been achieved.

Abstract: The present invention relates to a wear resistant coating suitable to be deposited on cutting tool inserts for chip forming metal machining. The coating comprises at least two layers with different grain size, but with essentially the same composition. The coating is deposited by Physical Vapour Deposition (PVD).

Abstract: A method of producing hard wear resistant layer with improved wear resistance. The method is a reactive arc-evaporation based process using a cathode including as main constituent at least one phase of a refractory compound Mn+1AXn (n=1, 2 or 3), wherein M is one or more metals selected from the groups IIIB, IVB, VB, VIB and VIIB of the periodic table of elements, A is one or more elements selected from the groups IIIA, IVA, VA and VIA of the periodic table of elements, and wherein X is carbon and/or nitrogen.

Abstract: A cutting tool includes a body of a hard alloy of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel and on which at least one of the functioning parts of the surface thereof, a hard and wear resistant coating is applied. The coating includes a polycrystalline laminar, multilayered structure of metal nitride compounds, in a repetitive form . . . MeN/(Ti1-xAlx)N/MeN/(Ti1-xAlx)N/MeN/(Ti1-xAlx)N/MeN/(Ti1-xAlx)N . . . of cubic structured (Ti1-xAlx)N layers where 0.3<x<0.95 and cubic structured MeN layers where Me is one or more of the metal element Ti, Zr, Hf, V, Nb, Ta, Mo and Al. The laminated structure has a repeat period, ?, of 5 nm??<20 nm, a layer thickness relation of 1/10<(dMeN/d(Ti,Al)N)<1/3 and a thickness dMeN?1 nm that is essentially constant throughout its total thickness up to 20 ?m.

Abstract: A wear resistant coating suitable to be deposited on cutting tool inserts for chip forming metal machining, includes at least two layers with different grain size, but with essentially the same composition. The coating is deposited by Physical Vapour Deposition (PVD).

Abstract: A cutting tool insert includes a body of cemented carbide, cermet, ceramics, high speed steel (HSS), polycrystalline diamond (PCD) or polycrystalline cubic boron nitride (PCBN), a hard and wear resistant coating is applied, grown by physical vapour deposition (PVD) such as cathodic are evaporation or magnetron sputtering. The coating includes at least one layer of (ZrxAl1-x)N with 0.05<x<0.30 with a thickness between 0.5 and 10 ?m. The layer has a nanocrystalline columnar microstructure consisting of a single cubic phase or a mixture of hexagonal and cubic phases. The insert is particularly useful in metal cutting applications generating high temperatures with improved edge integrity.

Abstract: Forming coated cemented carbide inserts, particularly useful in fine turning of super alloys. The inserts are characterized by a composition of a cemented carbide of WC, about 4.0 wt-% Co to about 7.0 wt-% Co, about 0.25 wt-% Cr to 0.50 wt-% Cr, and a coercivity (Hc) of about 28 kA/m to about 38 kA/m. The coating comprises a single (Ti1-xSix)N-layer, where x is between about 0.1 and about 0.25, with a crystal structure of NaCl type and a total thickness between about 0.5 ?m and about 2.0 ?m with a strong (200)-texture.

Abstract: A cutting tool insert includes a body of cemented carbide, cermet, ceramics, high speed steel (HSS), polycrystalline diamond (PCD) or polycrystalline cubic boron nitride (PCBN), a hard and wear resistant coating is applied, grown by physical vapour deposition (PVD) such as cathodic are evaporation or magnetron sputtering. The coating includes at least one layer of (ZrxAl1-x)N with 0.05<x<0.30 with a thickness between 0.5 and 10 ?m. The layer has a nanocrystalline columnar microstructure consisting of a single cubic phase or a mixture of hexagonal and cubic phases. The insert is particularly useful in metal cutting applications generating high temperatures with improved edge integrity.

Abstract: A cutting tool insert is formed from a substrate selected from cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel. The insert includes a hard and wear-resistant coating formed from laminar polycrystalline metal nitrides layers. The laminar polycrystalline metal nitrides layers have a repetitive form . . . A/B/A/C/A/B/A/C/ . . . with a total thickness of about 0.5 ?m to about 5 ?m.

Abstract: A cutting tool insert is formed from a substrate selected from cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel. The insert includes a hard and wear-resistant coating formed from laminar polycrystalline metal nitrides layers. The laminar polycrystalline metal nitrides layers have a repetitive form . . . A/B/A/C/A/B/A/C/ . . . with a total thickness of about 0.5 ?m to about 5 ?m.

Abstract: A method of making cutting tool inserts with high demands on dimensional accuracy includes: mixing by milling of powders forming hard constituents and binder phase, forming the powder mixture to bodies of desired shape, sintering the formed bodies, grinding with high accuracy the sintered bodies to inserts with desired shape and dimension, optionally edge rounding of cutting edges, and providing the ground inserts with a wear resistant non-diamond or non-diamond-like coating. According to the method, the ground inserts are heat treated prior to the coating operation in an inert atmosphere or vacuum or other protective atmosphere below the solidus of the binder phase for such a time that the micro structure of the surface region is restructured without causing significant dimensional changes. In this way inserts with unexpected improvement of tool life and dimensional accuracy have been achieved.

Abstract: Forming coated cemented carbide inserts, particularly useful in fine turning of super alloys. The inserts are characterized by a composition of a cemented carbide of WC, about 4.0 wt-% Co to about 7.0 wt-% Co, about 0.25 wt-% Cr to 0.50 wt-% Cr, and a coercivity (Hc) of about 28 kA/m to about 38 kA/m. The coating comprises a single (Ti1-xSix)N-layer, where x is between about 0.1 and about 0.25, with a crystal structure of NaCl type and a total thickness between about 0.5 ?m and about 2.0 ?m with a strong (200)-texture.

Abstract: Cutting tool inserts comprising a substrate selected from the group consisting of cemented carbide, cermet, ceramics, cubic boron nitride based material, and high speed steel; and a hard and wear-resistant coating comprising laminar polycrystalline metal nitrides layers are disclosed. Methods of making a cutting tool insert are also disclosed. In addition, methods for machining of stainless steel and super alloys using the cutting tool inserts are disclosed.

Abstract: Coated cemented carbide inserts, particularly useful in fine turning of super alloys, are disclosed. The inserts are characterized by a composition of a cemented carbide of WC, about 4.0 wt-% Co to about 7.0 wt-% Co, about 0.25 wt-% Cr to 0.50 wt-% Cr, and a coercivity (Hc) of about 28 kA/m to about 38 kA/m. The coating comprises a single (Ti1-xSix)N-layer, where x is between about 0.1 and about 0.25, with a crystal structure of NaCl type and a total thickness between about 0.5 ?m and about 2.0 ?m with a strong (200)-texture.

Abstract: The present invention relates to a cutting tool insert, solid end mill, or drill, comprising a substrate and a coating. The coating is composed of one or more layers of refractory compounds of which at least one layer comprises a cubic (Me,Si)X phase, where Me is one or more of the elements Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and Al, and X is one or more of the elements N, C, O or B. The ratio R=(at-% X)/(at-% Me) of the c-MeSiX phase is between 0.5 and 1.0 and X contains less than 30 at-% of O+B. This invention is particularly useful in metal machining applications where the chip thickness is small and the work material is hard e.g. copy milling using solid end mills, insert milling cutters or drilling of hardened steels.

Abstract: A cutting tool includes a body of a hard alloy of cemented carbide, cermet, ceramics, cubic boron nitride based material or high speed steel and on which at least one of the functioning parts of the surface thereof, a hard and wear resistant coating is applied. The coating includes a polycrystalline laminar, multilayered structure of metal nitride compounds, in a repetitive form . . . MeN/(Ti1-xAlx)N/MeN/(Ti1-xAlx)N/MeN/(Ti1-xAlx)N/MeN/(Ti1-xAlx)N . . . of cubic structured (Ti1-xAlx)N layers where 0.3<x<0.95 and cubic structured MeN layers where Me is one or more of the metal element Ti, Zr, Hf, V, Nb, Ta, Mo and Al. The laminated structure has a repeat period, ?, of 5 nm??<20 nm, a layer thickness relation of 1/10<(dMeN/d(Ti,Al)N)<1/3 and a thickness dMeN?1 nm that is essentially constant throughout its total thickness up to 20 ?m.

Abstract: A method of producing hard wear resistant layer with improved wear resistance. The method is a reactive arc-evaporation based process using a cathode including as main constituent at least one phase of a refractory compound Mn+1AXn (n=1, 2 or 3), wherein M is one or more metals selected from the groups IIIB, IVB, VB, VIIB and VIIB of the periodic table of elements, A is one or more elements selected from the groups IIIA, IVA, VA and VIA of the periodic table of elements, and wherein X is carbon and/or nitrogen.