A coated cutting tool, comprising: a substrate; and a coating layer formed on a surface of the substrate, wherein the coating layer includes a lower layer and an upper layer in this order from a substrate side toward a surface side, and the upper layer is formed on a surface of the lower layer, the lower layer contains a compound having a composition represented by (Al.sub.xTi.sub.1-x)N, an average thickness of the lower layer is 1.0 μm or more and 15.0 μm or less, the upper layer contains an α-Al.sub.2O.sub.3 layer containing α-Al.sub.2O.sub.3, an average thickness of the upper layer is 0.5 μm or more and 15.0 μm or less, and in grains of the α-Al.sub.2O.sub.3 layer, a proportion of grains of which a grain size is 0.05 μm or more and less than 0.5 μm is 50% by area or more and 80% by area or less.

A coating includes a first base layer including a nitride of at least Al and Cr, a second base layer including a nitride of at least Al and Cr overlying the first base layer, and an outermost indicator layer overlying the second base layer. The first base layer has a positive residual compressive stress gradient. The second base layer has substantially constant residual compressive stresses. The outermost indicator layer includes a nitride of Si and Me, wherein Me is at least one of Ti, Zr, Hf, and Cr. The outermost indicator layer has residual compressive stresses that are less than the residual compressive stresses of the second base layer.

A surface-coated cutting tool including a tool substrate containing WC crystal grains and insulating grains, and a coating layer composed of a multiple nitride of Ti, Al, and V and disposed on the surface of the tool substrate. The multiple nitride is represented by a compositional formula: Ti.sub.aAl.sub.bV.sub.cN satisfying the following relations:
0.25≤a≤0.35,
0.64≤b≤0.74,
0<c≤0.06, and
a+b+c=1
wherein each of a, b, and c represents an atomic proportion. The coating layer is characterized by exhibiting a peak attributed to a hexagonal crystal phase and a peak attributed to a cubic crystal phase as observed through X-ray diffractometry.

Provided is a surface-coated cutting tool including a complex carbonitride layer on the tool body, wherein a ratio of crystal grains having a NaCl type face-centered cubic structure is 80 area % or more, x.sub.avg and y.sub.avg satisfy 0.60≤x.sub.avg≤0.90 and 0.000≤y.sub.avg≤0.050, respectively, a composition of the Ti—Al complex carbonitride layer being represented by (Ti.sub.1-xAl.sub.x)(C.sub.yN.sub.1-y), the x.sub.avg being an average of x that is an Al content in a total content of Al and Ti, and the y.sub.avg being an average of y that is a C content in a total content of C and N, the crystal grains having the NaCl type face-centered cubic structure include crystal grains in which the x repeatedly increases and decreases, the crystal grains include 10 to 40 area % of crystal grains G.sub.1 having an average distance of 40 to 160 nm and crystal grains G.sub.s having an average distance of 1 to 7 nm.

A surface coated cutting tool includes a tool substrate; and a hard coating layer on the tool substrate. The hard coating layer includes, in sequence from the tool substrate toward a surface of the tool, a titanium carbonitride inner layer, a titanium nitride lower intermediate layer, a titanium carbonitride upper intermediate layer, a titanium oxycarbonitride bonding auxiliary layer, and an aluminum oxide outer layer. Titanium nitride grain boundaries in the lower intermediate layer and titanium carbonitride grain boundaries in the upper intermediate layer are continuous from titanium carbonitride grain boundaries in the inner layer. The texture coefficient TC(422) of titanium carbonitride in the inner layer and the upper intermediate layer is 3.0 or more, and the texture coefficient TC(0 0 12) of α-aluminum oxide in the outer layer is 5.0 or more.

A coated tool according to the present disclosure comprises a base body and a coating film. The base body contains a plurality of boron nitride particles. The coating film is located on the base body. Furthermore, the coating film includes a hard layer and a metal layer other than a simple substance of Ti, Zr, V, Cr, Ta, Nb, Hf, and Al located between the base body and the hard layer.

Provided is a cutting tool that can have a long tool life even when used to cut soft metals in particular. The cutting tool comprises a base body and a hard carbon film arranged on the base body, the hard carbon film includes an amorphous phase and a graphite phase, the density of the hard carbon film is no less than 2.5 g/cm.sup.3 and no more than 3.5 g/cm.sup.3, the degree of crystallinity of the hard carbon film is no more than 6.5%, and the average coordination number of the amorphous phase is no less than 2.5 and no more than 4.

A coated tool for hot stamping of coated or uncoated sheet metals, comprising a coated substrate surface to be in contact with the coated or uncoated metal sheet, wherein the coating in the coated substrate surface comprises one or more inferior layers and one or more superior layers, where the inferior layers are deposited closer to the substrate surface than the superior layers, and: the inferior layers are designed for providing load bearing capacity, the superior layers are designed for providing galling resistance, at least one superior layer is deposited having a multi-nanolayer structure wherein: one type of nanolayer is composed of at least 90 at.-% of chromium and nitrogen, a second type of nanolayer is composed of at least 90 at.-% of titanium, aluminum and nitrogen, a third type of nanolayer is composed of at least 90 at.-% of vanadium carbon and nitrogen.

A method of manufacturing a device includes thermally spraying tungsten carbine in feedstock that does not include Cobalt but that includes Nickel, Copper, or a Nickel-Copper alloy, the method improves the base coating toughness, anticorrosion, and antifouling properties for high load application in sea water and brackish water environments. Additionally, a Cobalt-free material lowers material costs and reduces the global demand of Cobalt. Providing a topcoat of a Silicon-doped DLC significantly reduces the topcoat brittleness of common DLC failures such as “egg shell” in high stress applications. Thus, high hardness, low friction applications may be tailored in high stress applications.

A cutting tool including a base material and a hard layer provided on the base material, in which the hard layer is composed of a compound represented by Ti.sub.aAl.sub.bB.sub.cN, an atomic ratio a is 0.25 or more and less than 0.55, an atomic ratio b of is 0.45 or more and less than 0.75, an atomic ratio c of is more than 0 and 0.1 or less, a sum of the atomic ratio a, the atomic ratio b and the atomic ratio c is 1, a ratio I.sub.(200)/I.sub.(002) of an intensity I.sub.(200) of an X-ray diffraction peak of a (200) plane to an intensity I.sub.(002) of an X-ray diffraction peak of a (002) plane in the hard layer is 2 to 10, and a full width at half maximum of the X-ray diffraction peak of the (002) plane is 2 degrees to 8 degrees.