Abstract: A coated cutting insert for removing material from a workpiece that includes a substrate is disclosed. A wear-resistant coating on the substrate that includes an ?-alumina layer and a Zr— or Hf— carbonitride outer layer deposited on the ?-alumina layer. The Zr— or Hf— carbonitride outer layer is subjected to a post-coat wet blasting treatment. The wet blasting changes the stress condition of the exposed alumina coating layer from an initial tensile stress condition to a compressive stress condition.

Abstract: The invention relates to a body which is coated with hard material and has a plurality of layers applied by means of CVD, wherein the outer layer comprises Ti1-xAlxN, Ti1-xAlxC and/or Ti1-xAlxCN where 0.65?x?0.9, preferably 0.7?x?0.9, and this outer layer has compressive stresses in the range from 100 to 1100 MPa, preferably from 400 to 800 MPa, and a TiCN or Al2O3 layer is arranged under this outer layer.

Abstract: The invention relates to a body which is coated with hard material and has a plurality of layers applied by means of CVD, in which an Al2O3 layer is arranged as outer layer on a Ti1-xAlxN layer and/or Ti1-xAlxC layer and/or Ti1-xAlxCN layer.

Abstract: The invention relates to a method for producing a coated substrate body by chemical vapour deposition at least on one layer made of a carbonitride of a metal of IVa-VIa-groups of the periodic table, wherein a monocyclic hydrocarbon is used in the gas atmosphere during the deposition, in addition to a nitrile. According to the invention, the thus produced coated substrate body has a high degree of hardness and is used, preferably, in cutting operations where the cutting speeds are ?250 m/min.

Abstract: The invention relates to a tool, especially a cutting tool, comprising a substrate member onto which at least one layer is deposited by means of CVD, and a method for the chemical vapor deposition of a two-phase layer on a sintered part. According to the invention, the single deposited layer or at least one of the layers is provided with a TiCN phase, TiOCN phase, TiOC phase, or TiC phase and an additional phase consisting of ZrO2 and/or HfO2. CH3CN, C5H5N, or C6H6 is used in the gas atmosphere for producing such a layer in addition to TiCl4, HfCl4, and/or ZrCl4 and CO2, the remainder being composed of H2 and/or Ar.

Abstract: A composite material has a base substrate body with first and second coatings. Each coating is formed by a multiphase layer of titanium oxide and at least two oxides from the group of aluminum, zirconium, and hafnium oxide and a second single-phase layer on the first layer consisting of only one oxide of aluminum, zirconium, and hafnium.

Abstract: The invention relates to a tool, especially a cutting tool, comprising a substrate member onto which at least one layer is deposited by means of CVD, and a method for the chemical vapor deposition of a two-phase layer on a sintered part. According to the invention, the single deposited layer or at least one of the layers is provided with a TiCN phase. TiOCN phase, TiOC phase, or TiC phase and an additional phase consisting of ZrO2 and/or HfO2. CH3CN, C5H5N, or C6H6 is used in the gas atmosphere for producing such a layer in addition to TiCl4, HfCl4, and/or ZrCl4 and CO2. the remainder being composed of H2 and/or Ar.

Abstract: The invention relates to a composite material consisting of a base body with a multilayered coating, containing at least one mulitphase layer of aluminum oxide, zirconium and/or hafnium and titanium and a single-phase layer made of AI2O3, ZrO2 and/or HfO2.

Abstract: A method of increasing the compressive stress or of reducing the tensile residual stress of a CVD layer, a PCVD layer or PVD layer and a cutting insert for machining. The invention relates to a method of increasing the compressive residual stress or of reducing the tensile residual stress of a hard material outer layer or a hard material outermost layer in which the coated substrate after coating is subjected to a dry blast treatment using a granular blast agent that, according to the invention, has a maximum diameter of 150 ?m.

Abstract: The invention relates to a composite material comprised of a coated hard metal or cermet base and to a method for the production thereof. The single layer or multilayer coating on the base contains at least one layer with a thickness ranging from 0.5 &mgr;m to 25 &mgr;m, at least one Al2O3 phase, and at least one phase comprised of ZrO2 and/or HfO2. According to the invention, a third finely dispersive phase comprised of an oxide, oxicarbide, oxinitride or oxicarbonitride of titanium should be included in this Al2O3/ZrO2 layer and/or HfO2 layer. To this end, a CVD process is used at depositing temperatures ranging from 900 ° C. to 1000 ° C. in the gas phase under pressures ran from 10 to 100000 Pa, whereby the gas phase, in addition to the gases essential for deposition, contains 0.2 to 5 mol % TiCl4.

Abstract: A method of increasing the compressive stress or of reducing the tensile residual stress of a CVD layer, a PCVD layer or PVD layer and a cutting insert for machining.

Abstract: The invention relates to a tool, especially a cutting insert for cutting metallic materials, which consist of a hard metal, cermet ceramics or steel base, especially of a high speed steel base, and at least one layer deposited thereon. The single layer, or in the case of several layers the outer layer or the layer underneath the outer layer, contains molybdenum sulfide. The aim of the invention is to improve the resistance to wear of the friction-reducing, molybdenum sulfide containing layer even at high pressures. To this end, the molybdenum sulfide containing layer consists of an alternating sequence of two layer that are different from one another. The first layer contains 51 to 100% by weight of metallic molybdenum and the second layer contains 21 to 100% by weight of MoS2 which substantially consists of hexagonal crystals that are at least substantially oriented in a plane parallel to the tool surface.

Abstract: The invention relates to a tool, especially a cutting insert for cutting metallic materials, consisting of a hard metal, cermet, ceramic or steel base body and at least one coating deposited thereon. This single coating or in the event that there are several layers, the outer layer or the layer below the outer layer, consists essentially of molybdenum sulphide. The invention also relates to a method for producing the molybdenum sulphide coating by chemical vapour deposition. According to the invention, the molybdenum sulphide coating contains a mixture of the sulphide phases MoS2 and Mo2S3 with an essentially random orientation (isotropic orientation) of the phase crystals. The coating is applied by means of a chemical vapour deposition procedure.

Abstract: The invention pertains to a processing insert comprised of a body with a hard metal or ceramic substrate and with a multilayer coating and the manufacture of same. In order to have a highly fracture-tough insert with a relatively thick coating, it is suggested that an external layer (protective layer) be applied according to the CVD process, said layer being either a monophase or multiphase layer of Zr-based or Hf-based carbide nitride or carbonitride, and presenting internal compressive stresses. The layer(s) underlying the external layer, also applied according to the CVD process, also present(s), without any exception, internal compressive stresses, while at least one of them, maybe the only one laying under the protective layer is made of TiN, TiC and/or TiCN. The coating is applied according to a continuous CVD process at temperatures of 900° C. to 1100° C. and involves a specific modification of the gas compounds.

Abstract: A composite in which a substrate body is coated with a single layer or multiple layers and at least one layer has two or three phases comprised of cubic ZrCN and monoclinic or tetragonal ZrO2. The composite can be in the form of a lathe or milling cutter cutting insert.

Abstract: Disclosed are a composite body and the production and the use thereof. It consists of a substrate body with a single- or multilayer coating, containing either Ti, Zr, Hf, V, Nb carbides, nitrides, carbonitrides and/or Ta and/or Al2O3 or ZrO2. In order to improve the characteristics of wear from chip removal or another form of abrasion, the invention suggests that a layer of Zr, Hf, V, Nb, Ta or Cr carbonitride be precipitated either directly upon a layer of Al2O3— or ZrO2— or upon a thin intermediate layer of ZrC or ZrN up to 0,5 &mgr;m, or upon a TiN layer up to 0.1 &mgr;m, or indirectly upon a layer of Al2O3— or ZrO2—.

Abstract: A composite body for use, for example as a cutting tool, having a metal-carbonitride layer of titanium, zirconium or hafnium carbonitride with at least two of these metals in the lattice structure as deposited by a CVD or plasma-activated-CVD process.