Abstract: A method for manufacturing a cutting tool includes the steps of providing a body of cermet or cemented carbide, having a cutting edge with an edge radius Re smaller than 40 ?m, a flank a rake face, applying by PVD a single or a multilayer coating to at least a part of the surface of the body, comprising at least a part of the cutting edge and applying by PVD said single or multilayer coating, comprising PVD coating with at least one oxidic layer.

Abstract: A method for manufacturing a cutting tool includes the steps of providing a body of cermet or cemented carbide, having a cutting edge with an edge radius Re smaller than 40 ?m, a flank a rake face, applying by PVD a single or a multilayer coating to at least a part of the surface of the body, comprising at least a part of the cutting edge and applying by PVD said single or multilayer coating, comprising PVD coating with at least one oxidic layer.

Abstract: A coated article that includes a substrate and a wear-resistant coating scheme. The coated article may be a cutting insert shown to improve performance in chip-forming material removal operations or a wear-resistant component used in chipless forming operations. The wear-resistant coating scheme has an underlayer and top layer containing aluminum, chromium, and nitrogen. The coating scheme also includes a mediate multi-periodicity nanolayer coating scheme containing titanium, aluminum, chromium and nitrogen. The mediate multi-periodicity nanolayer coating scheme includes a plurality of sets of alternating layer arrangements. Each one of the alternating layer arrangements has a base layer comprising titanium, aluminum and nitrogen and a nanolayer region having a plurality of sets of alternating nanolayers. Each set of alternating nanolayers has one nanolayer having aluminum, chromium, titanium and nitrogen and another nanolayer having aluminum, chromium, titanium and nitrogen.

Abstract: A coated article that includes a substrate and a wear-resistant coating scheme. The coated article may be a cutting insert shown to improve performance in chip-forming material removal operations or a wear-resistant component used in chipless forming operations. The wear-resistant coating scheme has an underlayer and top layer containing aluminum, chromium, and nitrogen. The coating scheme also includes a mediate multi-periodicity nanolayer coating scheme containing titanium, aluminum, chromium and nitrogen. The mediate multi-periodicity nanolayer coating scheme includes a plurality of sets of alternating layer arrangements. Each one of the alternating layer arrangements has a base layer comprising titanium, aluminum and nitrogen and a nanolayer region having a plurality of sets of alternating nanolayers. Each set of alternating nanolayers has one nanolayer having aluminum, chromium, titanium and nitrogen and another nanolayer having aluminum, chromium, titanium and nitrogen.

Abstract: A process for physical vapor deposition of a refractory coating such as titanium nitride on a nonconductive substrate such as a ceramic substrate and the coated substrate produced thereby. The nonconductive substrate is coated by cleaning the nonconductive substrate surfaces and then depositing a first layer of a refractory metal such as titanium metal on the nonconductive substrate by physical vapor deposition. A second layer of a refractory compound such as titanium nitride is then deposited on the first layer by physical vapor deposition to produce a coated nonconductive substrate having enhanced coating adhesion.

Abstract: Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one CVD layer which may have a residual tensile stress and at least one layer having a high residual compressive stress. The outermost layer of the coating is preferably the one containing residual compressive stresses. The substrate is a composite having hard refractory grains.

Abstract: Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one chemical vapor deposited (CVD) layer and at least one physical vapor deposited (PVD) layer. The outermost layer of the coating is a PVD layer, containing residual compressive stresses. The substrate is a composite having hard refractory grains bonded together by a binder material.

Abstract: Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one CVD layer which may have a residual tensile stress and at least one layer having a high residual compressive stress. The outermost layer of the coating is preferably the one containing residual compressive stresses. The substrate is a composite having hard refractory grains. The cutting tool has been found to be particularly useful in the machining of titanium alloys and superalloys.

Abstract: Provided is a coated cutting tool having a binder enriched substrate. The coating includes at least one CVD layer which may be in a state of residual tensile stress and at least one layer in a state of residual compressive stress.

Abstract: A process for physical vapor deposition of a refractory coating such as titanium nitride on a nonconductive substrate such as a ceramic substrate and the coated substrate produced thereby. The nonconductive substrate is coated by cleaning the nonconductive substrate surfaces and then depositing a first layer of a refractory metal such as titanium metal on the nonconductive substrate by physical vapor deposition. A second layer of a refractory compound such as titanium nitride is then deposited on the first layer by physical vapor deposition to produce a coated nonconductive substrate having enhanced coating adhesion.

Abstract: Provided is a coated cutting tool having a binder enriched substrate. The coating includes at least one chemical vapor deposited (CVD) layer and at least one physical vapor deposited (PVD) layer. The PVD layer contains residual compressive stresses.

Abstract: Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one CVD layer which may have a residual tensile stress and at least one layer having a high residual compressive stress. The outermost layer of the coating is preferably the one containing residual compressive stresses. The substrate is a composite having hard refractory grains.

Abstract: Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one chemical vapor deposited (CVD) layer and at least one physical vapor deposited (PVD) layer. The outermost layer of the coating is a PVD layer, containing residual compressive stresses. The substrate is a composite having hard refractory grains bonded together by a binder material.

Abstract: A cutting tool is provided composed of a hard substrate having a PVD coating thereon having three layers. The innermost or first layer is composed of a group IVB (titanium, hafnium or zirconium) metal nitride. The middle or second layer is composed of a group IVB carbonitride. The outermost or third layer is also composed of a group IVB metal nitride. The PVD coating is characterized by high hardness and high residual compressive stresses.

Abstract: A steel billet is produced having free machining properties and substantially devoid of surface-cracking in the as-deformed condition and without surface conditioning. The steel contains bismuth and tellurium and may contain lead but in a smaller amount than is conventional in leaded, free machining steels. The billet was hot deformed at a temperature above about 920.degree. C. (1700.degree. F.) and below 1150.degree. C. (2100.degree. F.). The steel contains inclusions of MnTe and Bi.sub.2 Te.sub.3 as well as elemental Bi.

Abstract: A free machining cast steel shape containing bismuth which functions as a liquid metal embrittler. The ability of the bismuth to function as a liquid metal embrittler is enhanced by restricting the total amount of ingredients which lower the wetting ability of the bismuth to less than the bismuth content and by controlling the amount of strengthening elements added to the steel.

Abstract: A free machining steel shape containing bismuth which functions as a liquid metal embrittler. The opportunity for bismuth to function as a liquid metal embrittler is increased by limiting the size of bismuth-containing inclusions to less than five microns.

Abstract: A steel billet is produced having free machining properties and substantially devoid of surface-cracking in the as-deformed condition and without surface conditioning. The steel contains bismuth and tellurium and may contain lead but in a smaller amount than is conventional in leaded, free machining steels. The billet was hot deformed at a temperature above about 920.degree. C. (1700.degree. F.) and below 1150.degree. C. (2100.degree. F.). The steel contains inclusions of MnTe and Bi.sub.2 Te.sub.3 as well as elemental Bi.