JP2002113604A - Cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting tool concurrently provided with abrasion resistance at a high temperature and lubricity to reduce a chipping loss by intermittent cutting and to prevent a chipping loss by fusion. SOLUTION: This cutting tool is provided with a base material and a lubricious coat formed on this base material by alternately laminating an abrasive resistant coat containing a compound comprising two or more kinds of elements selected from a group of titanium, chromium and aluminum, and one or more elements selected from a group of carbon and nitrogen, or an abrasive resistant coat containing a compound comprising one or more elements selected from a group of titanium, zirconium and aluminum, and one or more element selected from a group of carbon and nitrogen, a hard carbon film formed so as to be brought into contact with the upper part of this abrasive resistant coat, and noncarbon film containing one or more element selected from a group of titanium, chromium, zirconium, hafnium, vanadium, boron, aluminum and silicon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool such as a drill, an end mill, a replaceable insert for milling, a replaceable insert for turning, a metal saw, a tooth cutting tool, a reamer, and a tap. The present invention relates to a cutting tool provided with a wearable coating.

[0002]

2. Description of the Related Art New cutting tool materials are being developed one after another in order to satisfy the demand for higher efficiency and higher precision of cutting tools. One of the indispensable tool manufacturing technologies in the flow of material development is a ceramic coating technology for forming a film on the surface of a cutting tool. Further, as a recent trend, in order to further improve the processing efficiency, the cutting speed has become higher, and the temperature of the cutting edge tends to be higher and higher. Therefore, the characteristics required for the tool material are becoming more severe.

[0003] Cutting tools are subject to various forms of damage.
The main ones are wear and loss. Wear can be broadly divided into (1) mechanical friction wear and (2) thermal wear caused by oxidation at high temperatures or diffusion between work materials. In any case, the wear becomes more remarkable as the cutting speed or the feed speed increases and the cutting edge temperature of the tool increases. On the other hand, chipping occurs due to large cutting resistance applied to the cutting edge and mechanical and thermal shocks, and is noticeable in high-speed feed cutting and interrupted cutting.

In order to meet the demands and situations of the market described above and to prevent such damages, titanium-based ceramics such as titanium nitride, titanium carbide and titanium carbonitride have been most widely used as film components of ceramic coatings. Have been. That is, WC (tungsten carbide)
As a hard coating layer on the surface of hard base material of cutting tools such as base cemented carbide, cermet, ceramics, high-speed steel, etc.
D (physical vapor deposition) method and CVD (chemical
It is well known that a single layer or a plurality of layers of titanium carbide, nitride, and carbonitride are formed by a vapor deposition method.

[0005] However, it is said that this titanium-based coating is excellent in abrasion resistance and toughness but inferior in oxidation resistance. Recent trends in cutting tools include: (1) cutting speeds are becoming higher in order to further improve machining efficiency;
(2) The cutting edge temperature of tools tends to be higher and higher due to the progress of dry machining to reduce cutting fluids, etc., and the improvement of oxidation resistance of the coating has become very important. .

Therefore, a method has been developed in which aluminum is added to the titanium-based film to achieve both the wear resistance and the oxidation resistance of the ceramic coating film. For example, a three-element titanium aluminum nitride ((Ti, Al) N) film has been developed. Currently,
As a component of such a ceramic coating film,
For example, a titanium aluminum carbonitride ((Ti, Al) CN) film disclosed in Japanese Patent Publication No. 5-67705 is being used. The surface of the titanium-aluminum carbonitride film is oxidized during the cutting process to form an oxide of titanium or aluminum. In particular, alumina, which is an oxide of aluminum, has high high-temperature hardness and excellent stability. It shows excellent performance that can be applied to material processing.

Furthermore, at present, ceramic coating films of a four-element system and a five-element system have been proposed. For example, JP-A-11-80932 discloses (Ti, Al,
A Pb) N film and a (Ti, Al, Pb) CN film are disclosed. JP-A-11-80933 discloses (Ti, A
An (1, Cu) N film and a (Ti, Al, Cu) CN film are disclosed. JP-A-2000-129424 discloses (Al, T
i, V) (NC) films are disclosed.

In the films disclosed in these publications, chipping easily occurs at the cutting edge due to insufficient toughness particularly when intermittent cutting of steel or the like is performed at a high speed, and the cutting life reaches a relatively short time. The aim was to improve the problem. However, recently, there are many types of work materials, and a material to be cut is often easily welded to a tool. In this case, there is a disadvantage that the work material is welded to the vicinity of the cutting edge of the tool, and the coating film as described above induces chipping of the cutting edge.

In order to prevent welding of a work material on the surface of a cutting tool, Japanese Patent Application Laid-Open No.
It has been proposed to form a titanium nitride film and a composite nitride film as wear-resistant coatings on the surface of a cutting tool. Here, the titanium nitride film is formed in contact with the surface of the base material of the cutting tool, and the composite nitride film is formed on the titanium nitride film and contains titanium, vanadium, and nitrogen. The outermost surface of the wear-resistant coating has a melting point of 1000 ° C. containing vanadium oxide.
It is coated with the following low melting point oxide. Coating the wear-resistant coating with a low-melting oxide in this way is because the frictional heat during cutting softens or melts the oxide, and the welded work material easily falls off, causing welding itself. To get rid of it.

However, in recent years, in addition to increasing the cutting speed in order to further improve the machining efficiency of the cutting tool, in particular, dry (dry) machining for reducing cutting oil has been promoted as an environmental measure. It is getting. From these facts, the cutting edge temperature of cutting tools tends to be higher and higher, so that the materials used in future tools must have high wear resistance at high temperatures and lubricity to prevent welding defects at the cutting edges. Is also required at the same time.

Therefore, Japanese Patent Application Laid-Open No. 2000-176705 discloses that TiN, TiCN, TiAlN, Al ₂ O ₃
Alternatively, a tool member has been proposed in which a hard material containing a combination of these materials is coated, and further coated with a hard carbon-based lubricating film. In this gazette, it has stable durability on a coating tool, and is inexpensive suitable for mass production.
In order to provide a hard carbon-based lubricating film, an intermediate layer composed of a component containing silicon and carbon or silicon, carbon and nitrogen is provided below the hard carbon-based lubricating film, and is in contact with an interface below the intermediate layer. A single layer of silicon having a thickness of 0.02 μm or more and 0.5 μm or less is formed.

However, there is a problem that the layer containing silicon formed under the hard carbon-based lubricating film in order to enhance the adhesion of the hard carbon-based lubricating film has low wear resistance and is brittle.

According to the method disclosed in the above publication, the hard carbon-based coating of the outermost surface layer is formed by ion plating and plasma CVD using a hydrocarbon-based gas. Contains hydrogen atoms. In general, it has been found that hydrogen atoms in a hard carbon-based film are desorbed from the film at a temperature of about 350 ° C. or more in the atmosphere. After hydrogen is desorbed, the hard carbon-based coating transforms into graphite, and its hardness is extremely reduced. Therefore,
It is difficult to use such a coating under a severe cutting environment.

Therefore, an object of the present invention has been made in view of the technical background as described above, has abrasion resistance at high temperatures, reduces defects in interrupted cutting, and reduces defects due to welding. An object of the present invention is to provide a cutting tool having lubricating properties for prevention.

[0015]

Means for Solving the Problems A cutting tool according to one aspect of the present invention (hereinafter referred to as "cutting tool 1") includes a base material and titanium (Ti) formed on the base material. And a compound comprising two or more elements selected from the group consisting of chromium (Cr) and aluminum (Al) and one or more elements selected from the group consisting of carbon (C) and nitrogen (N). A wear-resistant coating and a lubricating coating formed on and in contact with the wear-resistant coating.

In the cutting tool 1, since the compound forming the wear-resistant coating is extremely hard and has a high oxidation resistance temperature, the wear resistance of the cutting tool can be improved and the life can be prolonged. In addition, since the lubricating film is formed so as to be in contact with the wear-resistant film, the discharge of chips from the work material is improved, and the welding of the work material on the surface of the cutting tool is prevented. It can be suppressed, and as a result, breakage of the cutting edge can be prevented.

[0017] A cutting tool according to another aspect of the present invention (hereinafter referred to as "cutting tool 2") comprises a base material and titanium (Ti) and zirconium (Zr) formed on the base material. And a wear-resistant coating containing a compound consisting of one or more elements selected from the group consisting of aluminum (Al) and one or more elements selected from the group consisting of carbon (C) and nitrogen (N). And a lubricating film formed so as to be in contact with the wear-resistant film.

In the cutting tool 2, since the compound forming the wear-resistant coating is extremely hard and has a high oxidation resistance temperature, the wear resistance of the cutting tool can be improved and the life can be extended. Further, the abrasion-resistant coating has good adhesion to the lubricating coating, and thus also has a role as an adhesion-enhancing layer. Therefore, since the lubricating film is formed so as to be in contact with the abrasion-resistant film, the lubricating film does not peel off, the discharge of chips from the work material becomes good, and the cutting tool Welding of the work material on the surface can be suppressed, and as a result, breakage of the cutting edge in the initial stage of cutting can be prevented.

In the cutting tools 1 and 2, the lubricating coating preferably includes a hard carbon film. The hard carbon film is an amorphous carbon film or a hydrogenated carbon film,
-C: H, iC, diamond-like carbon (DL
C). This hard carbon film has high hardness, excellent flatness, and low coefficient of friction,
Preferred as a lubricating coating.

It is preferable that such a hard carbon film is mainly composed of carbon, especially when the main component is carbon, and especially when impurities which are inevitably mixed during film formation are removed. The hard carbon film has an inevitable impurity of argon (A
r) may be included.

The Knoop hardness (Hk) of the hard carbon film is 800
kg / mm ² or more, preferably 3500 kg / mm ² or less. Here, the Knoop hardness is 800 kg / mm ²
If it is less than 1, the wear resistance of the hard carbon film is reduced, and the tool life is shortened. In addition, Knoop hardness is 3500 kg / mm
^When it exceeds ² , the wear resistance of the hard carbon film is improved,
The compressive stress accumulated inside the hard carbon film increases,
Peeling of the film occurs. Knoop hardness (Hk) of hard carbon film
Is more preferably 1000 kg / mm ² or more and 2500 kg / mm ² or less.

Further, the lubricating film is made of a hard carbon film, titanium (Ti), chromium (Cr), zirconium (Zr),
Hafnium (Hf), vanadium (V), boron (B),
It is preferable to include a non-carbon film containing at least one element selected from the group consisting of aluminum (Al) and silicon (Si). In this case, the lubricating film may be formed by alternately laminating the hard carbon film and the non-carbon film. Here, the reason why the hard carbon film and the non-carbon film are alternately stacked is that the non-carbon film acts as an internal stress relaxation layer.

Further, the lubricating film is made of a hard carbon film, titanium (Ti), chromium (Cr), zirconium (Z
r), hafnium (Hf), vanadium (V), boron (B), aluminum (Al) and silicon (Si) and at least one element selected from the group consisting of carbon (C), nitrogen (N) and A compound film containing a compound comprising at least one element selected from the group consisting of oxygen (O). In this case, the lubricating film may be formed by alternately laminating the hard carbon film and the compound film. Here, the reason why the hard carbon film and the compound film are alternately stacked is that the compound film works so as to reduce the internal stress.

In the cutting tool 1, the thickness of the lubricating film is preferably 0.5 μm or more and 5 μm or less. Here, the reason why the thickness of the lubricating coating is limited to 0.5 μm or more and 5 μm or less is that when the thickness is less than 0.5 μm, the lubricating coating is not immediately worn and disappears, and the thickness exceeds 5 μm. This is because the residual stress accumulated in the lubricating film increases and the film peels off.

In the cutting tool 2, the thickness of the lubricating coating is preferably 0.1 μm or more and 5 μm or less. Here, the reason why the thickness of the lubricating film is limited to 0.1 μm or more and 5 μm or less is that when the thickness is less than 0.1 μm, the lubricating film is not immediately worn and disappears, and the thickness exceeds 5 μm. This is because the residual stress accumulated in the lubricating film increases and the film peels off. More preferably, the thickness of the lubricating coating is 0.1 μm or more and 3 μm or less.

In the cutting tool 1, the wear-resistant coating is
From two or more elements selected from the group consisting of titanium (Ti), chromium (Cr) and aluminum (Al) and one or more elements selected from the group consisting of carbon (C) and nitrogen (N) It is preferable to include a plurality of layers composed of a film of a compound. In the cutting tool 2, the wear-resistant coating is made of at least one element selected from the group consisting of titanium (Ti), zirconium (Zr) and aluminum (Al), and carbon (C) and nitrogen (N). It is preferable to include a plurality of layers composed of a film of a compound comprising at least one element selected from the group. In this case, by forming the wear-resistant coating from a plurality of layers, the wear resistance and the adhesion can be further improved. A film of the above compound may be formed in a thickness on the order of micrometers, and several to several tens of such films may be laminated to form a wear-resistant coating.
Alternatively, a film of the above compound may be formed in a thickness of the order of nanometers, and several hundred to several thousand layers may be laminated to form a wear-resistant coating.

In the cutting tool 1, the thickness of the wear-resistant coating is preferably not less than 0.5 μm and not more than 10 μm.
If the thickness of the abrasion-resistant coating is less than 0.5 μm, the abrasion-resistant coating is quickly worn and the abrasion resistance becomes insufficient. Further, when the thickness of the wear-resistant coating exceeds 10 μm, the residual stress accumulated in the wear-resistant coating increases, and the film is peeled off.

In the cutting tool 2, the thickness of the wear-resistant coating is preferably 0.1 μm or more and 10 μm or less.
If the thickness of the abrasion-resistant coating is less than 0.1 μm, the abrasion-resistant coating is quickly worn and the abrasion resistance becomes insufficient. Further, when the thickness of the wear-resistant coating exceeds 10 μm, the residual stress accumulated in the wear-resistant coating increases, and the film is peeled off. More preferably, the thickness of the wear-resistant coating is 0.5 μm or more and 5 μm or less.

In the cutting tool 1, the surface roughness of the wear-resistant coating is preferably not less than 0.03 μm and not more than 0.5 μm in Ra. If the surface roughness of the abrasion-resistant coating exceeds 0.5 μm in terms of Ra, protrusions present on the surface impair the lubricating effect.

In the cutting tool 2, the surface roughness of the wear-resistant coating is preferably 0.01 μm to 0.5 μm in Ra. If the surface roughness of the abrasion-resistant coating exceeds 0.5 μm in terms of Ra, protrusions present on the surface impair the lubricating effect.

The outermost surface of the cutting tool 1 is made of titanium (Ti),
At least one element selected from the group consisting of chromium (Cr) and aluminum (Al), and carbon (C) and nitrogen (N)
And a film of a compound comprising at least one element selected from the group consisting of oxygen (O). The outermost surface of the cutting tool 2 is made of titanium (Ti), zirconium (Zr), chromium (Cr) and aluminum (A
l) coated with a film of a compound comprising at least one element selected from the group consisting of carbon (C), nitrogen (N) and oxygen (O). Is preferred. When the outermost surface of the cutting tool 1 or 2 is coated with the film of the above compound, the color tone of the surface appearance is unified, the commercial value is improved, and the used corner can be easily identified.

In the cutting tool 1, a titanium (Ti) film, a titanium nitride (T
iN) film, chromium (Cr) film, and chromium nitride (Cr)
N) An intermediate layer including at least one film selected from the group consisting of films may be formed. In this case, the intermediate layer has good adhesion to both the surface of the substrate and the abrasion-resistant coating, so that the adhesion of the abrasion-resistant coating to the substrate can be further improved. Therefore, the life of the cutting tool can be further improved without the abrasion-resistant coating peeling off from the base material. The thickness of the intermediate layer is preferably 0.05 μm or more and 1.0 μm or less.

In the cutting tool 2, at least one element selected from the group consisting of elements of groups 4a, 5a and 6a of the periodic table, or the periodic rule is provided between the surface of the base material and the wear-resistant coating. 1 selected from the group consisting of elements of Tables 4a, 5a and 6a
An intermediate layer containing any one or more of nitrides, carbonitrides, and carbides of elements may be formed. In this case, the intermediate layer has good adhesion to both the surface of the substrate and the abrasion-resistant coating, so that the adhesion of the abrasion-resistant coating to the substrate can be further improved. Therefore, the life of the cutting tool can be further improved without the abrasion-resistant coating peeling off from the base material. In particular, titanium (T
i), an intermediate layer containing any of zirconium (Zr), chromium (Cr), titanium nitride (TiN), zirconium nitride (ZrN) or chromium nitride (CrN) is preferable from the viewpoint of adhesion. The intermediate layer may be formed between the wear-resistant coating and the lubricating coating. In particular, the intermediate layer containing titanium (Ti), zirconium (Zr) or chromium (Cr) has a chemical bond with the carbon of the hard carbon film constituting the lubricating film, and thus is strong against the lubricating film. This is preferable because an adhesive force can be obtained. When the thickness of the intermediate layer is 0.5 nm or more and 100 nm or less, it is preferable in terms of improving adhesion. If the thickness of the intermediate layer is less than 0.5 nm, the entire surface of the base material cannot be uniformly coated, so that sufficient adhesion of the intermediate layer to the base material cannot be obtained. Further, even if an intermediate layer having a thickness exceeding 100 nm is formed, further improvement in adhesion cannot be obtained, which is not preferable from the viewpoint of production cost.

In the cutting tools 1 and 2, a wear-resistant coating,
It is preferable that all of the lubricating film and the intermediate layer are formed by an arc ion type ion plating method or a sputtering method. In this case, the adhesion of each coating is improved. Furthermore, when each coating is formed by a sputtering method, it is preferable to use an unbalanced magnetron sputtering method having a high ionization rate among the sputtering methods from the viewpoint of adhesion.

As materials for the base materials of the cutting tools 1 and 2, tungsten carbide-based cemented carbide, cermet, ceramics,
It is preferably one of a cubic boron nitride sintered body, a diamond sintered body, and an iron-based alloy. The ceramic is preferably any of silicon carbide, silicon nitride, aluminum nitride, aluminum oxide, and boron carbide. The above-mentioned iron-based alloy is preferably high-speed steel, die steel or stainless steel.

The cutting tools 1 and 2 include a drill, an end mill,
It is used as a replaceable insert for milling, a replaceable insert for turning, a metal saw, a tooth cutting tool, a reamer or a tap.

[0037]

(Example 1) (1) Preparation of sample (i) Preparation of the product of the present invention As a substrate, for milling of cemented carbide of grade JISP30 and SDKN42 of JIS (Japanese Industrial Standard) chip shape. An exchangeable insert was prepared.

FIG. 1 is a side view showing a schematic configuration of a film forming apparatus used in an embodiment of the present invention, and FIG. 2 is a top view showing the schematic configuration. This film forming apparatus uses a known arc ion plating method.

Referring to FIG. 1, a film forming apparatus 1 includes a chamber 2, a main table 3, a support rod 4, and an arc evaporation source 5.
a and 5b, cathodes 6a and 6b, DC power supplies 7a, 7b and 8 as variable power supplies, a gas inlet 9 for supplying gas, and a gas outlet 14.

The chamber 2 is connected through a gas outlet 14 to a vacuum pump. Thereby, the pressure inside the chamber 2 can be changed. Inside the chamber 2, a main table 3, a support rod 4, and cathodes 6a and 6b are provided.

A support bar 4 provided inside the chamber 2 supports the main table 3. A rotation shaft is provided inside the support rod 4, and the rotation shaft rotates the main table 3. On the main table 3, a jig 11 for holding a plurality of base materials 10 is provided. The support bar 4, the main table 3, and the jig 11 are electrically connected to the negative electrode of the DC power supply 8. The positive electrode of the DC power supply 8 is grounded.

An arc evaporation source 5 is provided on the side wall of the chamber 2.
The arc-type evaporation source 5b and the cathode 6b are mounted so as to face the cathode a and the cathode 6a connected to the arc-type evaporation source 5a. As shown in FIG. 2, the arc type evaporation source 5d and the cathode 6d are attached to the side wall of the chamber 2 so as to face the arc type evaporation source 5c and the cathode 6c connected to the arc type evaporation source 5c. I have.

As shown in FIG. 1, the arc evaporation source 5a and the cathode 6a are electrically connected to the negative electrode of the DC power supply 7a. The positive electrode of the DC power supply 7 a is grounded and is electrically connected to the chamber 2. The arc evaporation source 5b and the cathode 6b are electrically connected to the negative electrode of the DC power supply 7b. The positive electrode of the DC power supply 7b is grounded and is electrically connected to the chamber 2. Although not shown in FIG. 1, a pair of arc evaporation sources 5c shown in FIG.
And cathode 6c, arc evaporation source 5d and cathode 6d
Are also electrically connected to the negative electrode of the DC power supply in the same manner as described above.

The DC power supplies 7a and 7b cause the arc-type evaporation sources 5a and 5b to partially melt by arc discharge between the cathodes 6a and 6b and the chamber 2, thereby displacing the cathode material in the directions shown by arrows 12a and 12b. Allow to evaporate.
A voltage of about several tens of volts is applied between the cathodes 6a and 6b and the chamber 2. The arc evaporation source 5a has an atomic ratio of titanium (Ti) to aluminum (Al) of 0.5.
It is formed from a compound of pair 0.5. The arc evaporation source 5b is formed from titanium (Ti).

Various gases are introduced into the gas inlet 9 from the direction indicated by the arrow 13. As an example of this gas,
There are argon, nitrogen, hydrogen, oxygen gas, or hydrocarbon gas such as methane, acetylene, benzene and the like.

First, using a film forming apparatus as shown in FIG. 1, while the main table 3 is being rotated, a gas is discharged from the gas discharge port 14 in the direction indicated by the arrow 15 by a vacuum pump, so that the inside of the chamber 2 is Was reduced in pressure. At this time, the substrate 10 was heated to 450 ° C. by a heater (not shown).
Alternatively, the chamber 2 was evacuated while being heated to 500 ° C. until the pressure inside the chamber 2 became 8 × 10 ⁻⁴ Pa or 1.3 × 10 ⁻³ Pa. Next, argon gas was introduced from the gas inlet 9 in the direction indicated by the arrow 13 to maintain the pressure inside the chamber 2 at 2.7 Pa, and gradually raised the voltage of the DC power supply 8 to -1000 V. The surface of the material 10 was cleaned for 10 minutes. Thereafter, argon gas was exhausted from the gas outlet 14 in the direction indicated by the arrow 15.

Next, while the voltage of the DC power supply 8 is maintained at -1000 V, the gas is introduced into the chamber 2 from the gas inlet 9.
Flow rate 100 SCCM (25 ° C, 1
A mixed gas of argon and nitrogen was introduced at a flow rate under standard pressure of air: cm ³ / min). DC power supply 7b to cathode 6
b was supplied with an arc current of 80 A, and titanium ions were generated from the arc evaporation source 5b of the cathode 6b. As a result, the titanium ions sputter-cleaned the surface of the substrate 10, and strong dirt and oxide films on the surface of the substrate 10 were removed.

Thereafter, the pressure inside the chamber 2 becomes 4 Pa
Nitrogen gas was introduced from the gas inlet 9, and the voltage of the DC power supply 8 was set to -150V or -200V.
Thereby, titanium nitride (Ti
N) Film formation started. This state was maintained until the thickness of the titanium nitride film reached a predetermined thickness. Thus, a titanium nitride film as an intermediate layer was formed.

When a chromium nitride (CrN) film is formed as the intermediate layer, the film formation conditions are the same as those of the titanium nitride film except that chromium (Cr) is used instead of titanium as the arc evaporation source 5b of the cathode 6b. The conditions were exactly the same as the formation conditions.

When a titanium (Ti) film was formed as the intermediate layer, the voltage of the DC power supply 8 was -200 V without introducing nitrogen gas.

When a chromium (Cr) film is formed as the intermediate layer, chromium (Cr) is used instead of titanium as the arc-type evaporation source 5b of the cathode 6b, and a DC current is applied without introducing nitrogen gas. The voltage of the power supply 8 was -200V.

Zirconium nitride (ZrN) as the intermediate layer
When forming a film, the arc evaporation source 5b of the cathode 6b is used.
, Except that zirconium (Zr) was used instead of titanium, the film forming conditions were exactly the same as the conditions for forming the titanium nitride film.

When a zirconium (Zr) film is formed as the intermediate layer, zirconium (Zr) is used in place of titanium as the arc-type evaporation source 5b of the cathode 6b, and a DC current is applied without introducing nitrogen gas. The voltage of the power supply 8 was -200V.

When the formation of the intermediate layer was completed, a current of 95 A was supplied from the DC power supply 7a to the cathode 6a in the above state. As a result, the compound of titanium and aluminum forming the arc evaporation source 5a provided on the cathode 6a evaporates in the direction shown by the arrow 12a, and titanium nitride as a wear-resistant coating having a predetermined thickness is formed on the surface of the base material 10. An aluminum ((Ti, Al) N) film was formed. When the composition formula of the titanium aluminum nitride film is (Ti _x , Al _{1 -x} ) N,
X is preferably in the range of 0.3 ≦ X ≦ 0.8.
Therefore, if the composition formula of the compound forming the arc evaporation source 5a is (Ti _x , Al _1-x ), X is 0.3 ≦ X ≦
It is preferably in the range of 0.8.

When a titanium aluminum carbonitride ((Ti, Al) CN) film is formed as a wear-resistant film, a mixture of nitrogen and methane is supplied from the gas inlet 9 so that the pressure inside the chamber 2 becomes 4 Pa. Except for introducing the gas, the film forming conditions were set the same as the film forming conditions of the titanium aluminum nitride film.

[0056] Further, titanium chromium aluminum nitride ((Ti, Cr, Al) N) in the case of forming a wear-resistant coating film, the composition formula of the compound forming the arc evaporation source 5a Ti _x Cr _y Al _z (0.1 ≦ x ≦ 0.8,
0.1 ≦ y ≦ 0.8, 0.1 ≦ z ≦ 0.8, x + y + z
= 1).

Titanium chromium carbonitride ((T
i, Cr, Al) CN) film, the composition formula of the compound forming the arc evaporation source 5a is Ti _0.33 Cr
_0.33 Al _{0.33 was used} , and the film forming conditions were set to be the same as those of the titanium aluminum carbonitride film. The composition formulas of the compounds forming the arc evaporation source 5a Ti _x Cr _y Al
_z (0.1 ≦ x ≦ 0.8, 0.1 ≦ y ≦ 0.8, 0.1
≦ z ≦ 0.8, x + y + z = 1).

Chromium aluminum nitride ((Cr, Al)
N) When forming a film, the composition formula of the compound forming the arc evaporation source 5a was Cr _0.5 Al _0.5 , and the film forming conditions were set to be the same as the film forming conditions of the titanium aluminum nitride film. Assuming that the composition formula of the compound forming the arc evaporation source 5a is (Cr _x , Al _{1 -x} ), X is 0.3 ≦ X ≦ 0.8.
Is preferably within the range.

Chromium aluminum carbonitride ((Cr, A
l) When the CN) film is formed, the arc evaporation source 5a
Was set to Cr _0.5 Al _0.5 and the film formation conditions were set to be the same as those of the titanium aluminum carbonitride film. Assuming that the composition formula of the compound forming the arc evaporation source 5a is (Cr _x , Al _{1 -x} ), X is 0.3 ≦ X
Preferably, it is within the range of ≦ 0.8.

When a titanium chromium nitride ((Ti, Cr) N) film is formed as the wear-resistant film, the composition of the compound forming the arc evaporation source 5a is Ti _0.5 Cr _0.5
The film forming conditions were set to be the same as those of the titanium aluminum nitride film. Assuming that the composition formula of the compound forming the arc evaporation source 5a is (Ti _x , Cr _1-x ), X is preferably in the range of 0.3 ≦ X ≦ 0.8.

Titanium chromium carbonitride ((Ti, Cr) C
N) When forming a film, the composition formula of the compound forming the arc evaporation source 5a was set to Ti _0.5 Cr _0.5 , and the film forming conditions were set to be the same as the film forming conditions for the titanium aluminum carbonitride film. Assuming that the composition formula of the compound forming the arc evaporation source 5a is (Ti _x , Cr _1-x ), X is 0.3 ≦ X ≦ 0.
It is preferably within the range of 8.

Zirconium nitride (Z
In the case of forming an (rN) film, the film forming conditions are exactly the same as those of the titanium nitride film as the intermediate layer, except that zirconium (Zr) is used instead of titanium as the arc evaporation source 5b of the cathode 6b. Conditions.

[0063] Also, titanium, zirconium aluminum nitride ((Ti, Zr, Al) N) in the case of forming a wear-resistant coating film, the composition formula of the compound forming the arc evaporation source 5a Ti _x Zr _y Al _z (0.1 ≦ x ≦ 0.8,
0.1 ≦ y ≦ 0.8, 0.1 ≦ z ≦ 0.8, x + y + z
= 1).

Titanium zirconium aluminum carbonitride
When forming a ((Ti, Zr, Al) CN) film,
The composition formula of the compound forming the arc evaporation source 5a is Ti
_0.33Zr _0.33Al_0.33And the film formation conditions were titanium carbonitride
The conditions were set the same as the conditions for forming the aluminum film. arc
The composition formula of the compound forming the evaporation source 5a is Ti_xZr_yA
l _z(0.1 ≦ x ≦ 0.8, 0.1 ≦ y ≦ 0.8, 0.
1 ≦ z ≦ 0.8, x + y + z = 1)
No.

Zirconium aluminum nitride ((Zr,
When the Al) N) film is formed, the arc evaporation source 5a
Was set to Zr _0.5 Al _0.5 and the film formation conditions were set to be the same as the film formation conditions for the titanium aluminum nitride film. Assuming that the composition formula of the compound forming the arc evaporation source 5a is (Zr _x , Al _{1 -x} ), X is 0.3 ≦ X ≦
It is preferably in the range of 0.8.

Zirconium aluminum carbonitride ((Z
In the case of forming an (r, Al) CN) film, the composition formula of the compound forming the arc evaporation source 5a is set to Zr _0.5 Al _0.5 , and the film forming conditions are set to be the same as those of the zirconium aluminum carbonitride film. did. When the composition formula of the compound forming the arc evaporation source 5a is (Zr _x , Al _1-x ),
X is preferably in the range of 0.3 ≦ X ≦ 0.8.

When a titanium-zirconium nitride ((Ti, Zr) N) film is formed as the wear-resistant coating, the composition formula of the compound forming the arc evaporation source 5a is Ti _0.5 Zr
_{It was set to 0.5} , and the film formation conditions were set to be the same as those of the titanium aluminum nitride film. When the composition formula of the compound forming the arc evaporation source 5a is (Ti _x , Zr ₁ -x), X
Is preferably in the range of 0.3 ≦ X ≦ 0.8.

Titanium zirconium carbonitride ((Ti, Z
r) When the CN) film is formed, the arc evaporation source 5a
Was set to Ti _0.5 Zr _0.5 and the film forming conditions were set to be the same as the film forming conditions for the titanium aluminum carbonitride film. Assuming that the composition formula of the compound forming the arc evaporation source 5a is (Ti _x , Zr _1-x ), X is 0.3 ≦ X
Preferably, it is within the range of ≦ 0.8.

For each sample, the surface roughness Ra (μm) of the wear-resistant coating was measured. Next, a hard carbon film was formed as a lubricating film on the wear-resistant film. The temperature of the substrate 10 is set to 200 ° C. using a substrate heater (not shown).
With a voltage of −35 V or −50 V applied to the main table 3 by the DC power supply 8, nitrogen (N ₂ ) gas and methane (CH ₄ ) are introduced into the chamber 2 of the film forming apparatus 1.
One or several kinds of gas, hydrogen (H ₂ ) gas and argon (Ar) gas were introduced at a total flow rate of 100 SCCM, or provided on the cathode 6 c by vacuum arc discharge with no gas introduced. The graphite target forming the arc evaporation source 5c is evaporated,
A hard carbon film was formed on the wear-resistant coating by ionization.

Further, when the above-mentioned lubricating film is formed, the arc-type evaporation source 5d provided on the cathode 6d is discharged by vacuum arc discharge while introducing a reaction gas from the gas inlet 9 into the chamber 2. Forming titanium (Ti),
Simultaneous evaporation of at least one metal selected from chromium (Cr), zirconium (Zr), hafnium (Hf), vanadium (V), boron (B), aluminum (Al) and silicon (Si) By
A lubricating film having a laminated structure composed of a hard carbon film and a predetermined non-carbon film or compound film could be formed on the wear-resistant film.

Note that a titanium nitride (TiN) film, a titanium carbonitride (TiCN) film,
Chromium nitride (CrN), zirconium nitride (ZrN),
A product of the present invention in which a titanium aluminum nitride (TiAlN) film or an aluminum oxide (Al ₂ O ₃ ) film was formed was also manufactured.

(Ii) Production of Conventional Products 1 and 3 In producing Conventional Products 1 and 3, the arc-type evaporation source 5a provided on the cathode 6a was replaced with an atomic ratio of titanium to aluminum of 0.5 to 0.5. The compound and the arc evaporation source 5b provided on the cathode 6b were formed of titanium. The other configuration of the film forming apparatus 1 was the same as that of the product of the present invention.

In the film forming apparatus 1, first, the substrate 10 was attached to the jig 11, and these were rotated as in the production of the product of the present invention. Next, in the same process as the production of the product of the present invention,
Was sputter-cleaned with argon ions and then sputter-cleaned with titanium ions to form a 0.5 μm thick titanium nitride (TiN) film.

When the formation of the titanium nitride film is completed, a current of 95 A is supplied from the DC power supply 7a to the cathode 6a at a voltage of -30 V for the conventional product 1 and at a voltage of -35 V for the conventional product 3, and Arc type evaporation source 5a provided in 6a
To generate titanium ions and aluminum ions.
A nitrogen gas was introduced from the gas inlet 9, and a voltage of −200 V was applied to the main table 3 by the DC power supply 8.
The titanium ions, the aluminum ions, and the nitrogen gas reacted with each other to form a titanium aluminum nitride ((Ti _0.5 , Al _0.5 ) N) film having a thickness of 3 μm on the titanium nitride film on the surface of the substrate 10.

(Iii) Production of Conventional Products 2 and 4 In producing Conventional Products 2 and 4, the arc evaporation source 5a provided on the cathode 6a and the arc evaporation source 5b provided on the cathode 6b were formed of titanium. Other configurations of the film forming apparatus 1 were the same as in the case of manufacturing the conventional product 1.

In the film forming apparatus 1, first, the substrate 10 was attached to the jig 11, and these were rotated as in the production of the product of the present invention. Next, in the same process as the production of the product of the present invention,
After the surface of No. 0 was sputter-cleaned with argon ions, it was sputter-cleaned with titanium ions, and a titanium nitride (TiN) film having a thickness of 0.5 μm was formed.

When the formation of the titanium nitride film is completed, a current of 95 A is supplied from the DC power supply 7 a to the cathode 6 a at a voltage of −30 V in the conventional product 2 and at a voltage of −35 V in the conventional product 4, Arc type evaporation source 5a provided in 6a
To generate titanium ions. A methane (CH ₄ ) gas and a nitrogen (N ₂ ) gas were introduced from the gas inlet 9, and a voltage of −200 V was applied to the main table 3. These gases react with titanium ions to form a 3 μm thick titanium carbonitride (Ti) on the titanium nitride film on the surface of the substrate 10.
(C _0.5 , N _0.5 )) film was formed.

As described above, the product No. 1 of the present invention having the film configuration shown in Tables 1 to 4 was obtained. 1 to 97, conventional product N
o. Nos. 1-4 were produced.

(2) Evaluation of Cutting Test The sample of the present invention No. 1
~ 97, conventional product No. For each of Nos. 1 to 4, face milling was actually performed using hot die steel (JIS SKD61) as a work material, and the life of the cutting tool was evaluated. The cutting conditions were a cutting speed of 50 m / min, a feed of 0.3 mm / blade, a cutting depth of 2 mm, and dry conditions. It should be noted that the determination of the life is made according to the product No. of the present invention. 1-47, conventional product N
o. As for Nos. 1 and 2, the wear amount (mm) of the flank at a cutting length of 15 m was measured. 48-94, conventional product N
o. For 3 and 4, the cutting length was determined based on the flank wear (mm) at a cutting length of 20 m. Tables 1 to 4 show the evaluation results of these lifespans.

In addition, the product No. of the present invention shown in Tables 3 and 4
For Nos. 48 to 97, the Knoop hardness (kg
/ Mm ² ) was also measured. Table 3 shows the results of these hardness measurements.
Are shown in FIGS.

[0081]

[Table 1]

[0082]

[Table 2]

[0083]

[Table 3]

[0084]

[Table 4]

As apparent from Tables 1 to 4, the product No. of the present invention. Nos. 1 to 47 are conventional product Nos. 1 and No. No. 2 of the present invention. 48 to 97 are conventional product Nos. 3 and No. 3 In contrast to No. 4, it was confirmed that the life of the cutting tool was greatly improved.

(Example 2) Coating was performed on the surface of a reamer (JIS K10 cemented carbide) as a substrate in the same manner as in Example 1, and a sample of the present invention (the film configuration is shown in Table 1) Conventional product 1 (the film configuration was the same as conventional product No. 1 in Table 2) and Conventional product 2 (the film configuration was the same as conventional product No. 1 in Table 2). .2).

Next, using these samples, drilling of cast iron was actually performed to evaluate the life of the cast iron.
Cutting conditions are: Reamer diameter 15mm, Cutting speed 10m / mi
n, feed 0.05 mm / blade, cut 0.15 mm, and wet conditions. The life was determined when the dimensional accuracy of the workpiece was out of the specified range.

As a result, in the product of the present invention, the dimensional accuracy was out of the specified range when 42,000 holes were drilled.
Then, when 4,200 holes were drilled, the dimensional accuracy was out of the specified range. Therefore, it was confirmed that the life of the reamer of the product of the present invention was greatly improved as compared with the conventional product.

(Embodiment 3) In the same manner as in Embodiment 1,
Coating was performed on the surface of an end mill (JIS K10 cemented carbide) as a base material, respectively, and the sample of the present invention (the film configuration was the same as that of the present invention No. 2 in Table 1) and the conventional product 1 The structure of the film was the same as that of the conventional product No. 1 in Table 2) and the conventional product 2 (the structure of the film was the same as that of the conventional product No. 2 of Table 2).

Next, using these samples, the end mill side milling (cutting width: 15 mm) of the cast iron was actually performed, and the life thereof was evaluated. Cutting conditions were as follows: cutting speed 75 m / min, feed 0.02 mm / tooth, cutting depth 2 mm,
Wet conditions were used. The life was determined when the dimensional accuracy of the workpiece was out of the specified range.

As a result, the dimensional accuracy of the product of the present invention was out of the specified range at the time of side milling the end mill having a length of 20 m, but the conventional product 1 was 1.8 m long and the conventional product 2 was not.
When the side milling process of the end mill with a length of 1.4 m was performed, the dimensional accuracy was out of the specified range. Therefore, it was confirmed that the life of the end mill of the present invention was greatly improved as compared with the conventional product.

(Embodiment 4) In the same manner as in Embodiment 1,
The present invention, which is a sample obtained by coating a coating on the surface of a base material using a turning-edge-changeable insert (JISP10 cemented carbide having a rake angle of 8 ° and a clearance angle of 6 °) as a base material. Product (film configuration is the product of the present invention No.
2), Conventional product 1 (see Table 2 for membrane configuration)
Of the conventional product No. 1) and Conventional Product 2 (the structure of the film was the same as Conventional Product No. 2 in Table 2).

Next, using these samples, semi-finishing turning of steel was actually performed, and the life thereof was evaluated. The cutting conditions were a cutting speed of 180 m / min and a feed of 0.
2 mm / blade. The life was determined when the dimensional accuracy of the workpiece was out of the specified range.

As a result, when the semi-finished turning was performed for 180 minutes in the product of the present invention, the dimensional accuracy was out of the specified range. However, the semi-finished turning was performed for 48 minutes in the conventional product 1 and 52 minutes in the conventional product 2. At the time of processing, the dimensional accuracy was out of the specified range. Therefore, it has been confirmed that the life of the turning-tip replacement type insert of the present invention is greatly improved as compared with the conventional product.

(Example 5) By the same method as in Example 1,
Using a drill having a diameter of 8 mm (JIS K10 cemented carbide) as a base material, coating was performed on the surface of the base material.
Of the present invention No. Conventional product 1 (the film configuration was the same as conventional product No. 1 in Table 2) and Conventional product 2 (the film configuration was the same as conventional product No. 2 in Table 2).
Was made the same as above).

Next, using these samples, a hole (depth of 32 mm) of SCM440 (JIS name) was actually
The blind hole was machined and its life was evaluated.
Cutting conditions are: cutting speed 70m / min, feed 0.5mm
/ Rotation, no cutting oil (completely dry). In addition,
The life was determined based on the relationship between the number of drilled holes and the cutting power.

As a result, even if 650 holes were drilled in the drill of the present invention, the cutting power did not substantially change, and the drilling could be continued with a constant cutting power. Further, in the product of the present invention, the target cutting length of 20 m was cleared, and excellent characteristics were obtained.

On the other hand, in the conventional products 1 and 2, the cutting power suddenly increased in the second drilling, so that the drilling could not be continued any more. From these facts, it was confirmed that the product of the present invention can be stably cut in a completely dry state in which no cutting oil is present, and that the life is greatly improved.

(Example 6) Coating was performed on the surface of a reamer (JIS K10 cemented carbide) as a substrate in the same manner as in Example 1, and the sample of the present invention (the film configuration is shown in Table 3) Invention product No. 49
Conventional product 3 (the film configuration was the same as conventional product No. 3 in Table 4) and Conventional product 2 (the film configuration was the same as conventional product No. 4 in Table 4). ) Was prepared.

Next, using these samples, drilling of cast iron was actually performed, and the life of the cast iron was evaluated.
Cutting conditions are reamer diameter 16mm, cutting speed 10m / mi
n, feed 0.05 mm / blade, cut 0.15 mm, and wet conditions. The life was determined when the dimensional accuracy of the workpiece was out of the specified range.

As a result, the dimensional accuracy of the product of the present invention was out of the specified range when 39000 holes were drilled.
Then, when 4060 holes were drilled, the dimensional accuracy was out of the specified range. Therefore, it was confirmed that the life of the reamer of the product of the present invention was greatly improved as compared with the conventional product.

(Embodiment 7) By the same method as in Embodiment 1,
Coating was performed on the surface of an end mill (JIS K10 cemented carbide) as a base material, respectively, and the sample of the present invention product (film composition of the present invention No. 49 in Table 3 is shown)
Conventional product 3 (the film configuration was the same as conventional product No. 3 in Table 4) and Conventional product 4 (the film configuration was the same as conventional product No. 4 in Table 4). ) Was prepared.

Next, using these samples, the end mill side milling (cutting width 15 mm) of cast iron was actually performed, and the life thereof was evaluated. Cutting conditions were as follows: cutting speed 80 m / min, feed 0.02 mm / tooth, depth of cut 2 mm,
Wet conditions were used. The life was determined when the dimensional accuracy of the workpiece was out of the specified range.

As a result, the dimensional accuracy of the product of the present invention was out of the specified range at the time of side milling the end mill having a length of 25 m, but the conventional product 3 had a length of 1.6 m and the conventional product 4
At the time when the side milling process of the end mill having a length of 1.9 m was performed, the dimensional accuracy was out of the specified range. Therefore, it was confirmed that the life of the end mill of the present invention was greatly improved as compared with the conventional product.

(Embodiment 8) In the same manner as in Embodiment 1,
The present invention, which is a sample obtained by coating a coating on the surface of a base material using a turning-edge-changeable insert (JISP10 cemented carbide having a rake angle of 8 ° and a clearance angle of 6 °) as a base material. Product (the structure of the film is the product No. of the present invention in Table 3).
49), Conventional product 3 (the structure of the membrane was the same as Conventional product No. 3 in Table 3), and Conventional product 4 (the structure of the film was the same as Conventional product No. 4 in Table 4). did)
Was prepared.

Next, using these samples, semi-finishing turning of steel was actually performed, and the life thereof was evaluated. Cutting conditions were as follows: cutting speed 190 m / min, feed 0.
2 mm / blade. The life was determined when the dimensional accuracy of the workpiece was out of the specified range.

As a result, when the semi-finished turning was performed for 190 minutes in the product of the present invention, the dimensional accuracy was out of the specified range when the semi-finished turning was performed. At the time of processing, the dimensional accuracy was out of the specified range. Therefore, it has been confirmed that the life of the turning-tip replacement type insert of the present invention is greatly improved as compared with the conventional product.

(Embodiment 9) By the same method as in Embodiment 1,
Using a drill having a diameter of 8 mm (JIS K10 cemented carbide) as a base material, coating was performed on the surface of the base material, and the sample of the present invention (for the film configuration, see Table 3)
Of the present invention No. 49), Conventional product 3 (film configuration was the same as conventional product No. 3 in Table 4), and Conventional product 4 (film configuration was conventional product No. 3 in Table 4).
4).

Next, by using these samples, a hole (depth of 30 mm) was actually formed in SCM440 (JIS name).
The blind hole was machined and its life was evaluated.
Cutting conditions are: cutting speed 70m / min, feed 0.5mm
/ Rotation, no cutting oil (completely dry). In addition,
The life was determined based on the relationship between the number of drilled holes and the cutting power.

As a result, even if 660 holes were drilled in the drill of the present invention, the cutting power was not substantially changed, and the drilling could be continued with a constant cutting power. Further, in the product of the present invention, the target cutting length of 20 m was cleared, and excellent characteristics were obtained.

On the other hand, in the conventional products 3 and 4, since the cutting power sharply increased in the second drilling, the drilling could not be continued any more. From these facts, it was confirmed that the product of the present invention can be stably cut in a completely dry state in which no cutting oil is present, and that the life is greatly improved.

Example 10 In the same manner as in Example 1, using a drill (JIS K10 cemented carbide) having a diameter of 6.8 mm as a base material, coating was performed on the surface of the base material. The product of the present invention (the structure of the membrane was the same as that of the product No. 49 of the present invention in Table 3), the conventional product 3 (the structure of the membrane was the same as that of the conventional product No. 3 of Table 4) and the conventional product (The structure of the film was the same as that of the conventional product No. 4 in Table 4).

Next, by using these samples, a hole (depth of 30 mm) was actually formed in SCM440 (JIS name).
The blind hole was machined and its life was evaluated.
The cutting conditions were as follows: cutting speed 100 m / min, feed 0.05
mm / rotation, no cutting oil (fully dry). The life was determined based on the relationship between the number of drilled holes and the cutting power.

As a result, even if 480 holes were drilled in the drill of the present invention, the cutting power did not substantially change, and the drilling could be continued with a constant cutting power.

On the other hand, since the cutting power sharply increased in the second drilling in the conventional product 3 and in the third drilling in the conventional product 4, the drilling could not be continued any more. From these facts, it was confirmed that the product of the present invention can be stably cut in a completely dry state in which no cutting oil is present, and that the life is greatly improved.

The present invention has been described above. However, the present invention is not limited to the above-described tools, but may be used in other shapes such as end mills, millable cutting edge-changing tips, turning edge-changing tips, metal saws, gear cutting tools, and the like. It can be applied to cutting tools such as reamers and taps. Also, the present invention can be applied to dies for other shapes such as for metal pressing, metal forging, die casting, and plastic molding.

The above-disclosed embodiments are to be considered in all respects as illustrative and not restrictive. For example, a plurality of wear-resistant coatings may be provided, and the method of forming the coating is not limited to the arc ion type ion plating. For example, the coating may be formed by a method combined with a sputtering method. Good. Further, the ratio of titanium (Ti), chromium (Cr) and aluminum (Al) in the coating, or the ratio of titanium (Ti), zirconium (Zr) and aluminum (Al) may be variously set. The scope of the present invention is defined by the terms of the claims, rather than the description of the embodiments, and is intended to include any modifications or variations within the meaning and range equivalent to the terms of the claims.

[0118]

As described above, according to the present invention, in a cutting tool such as a drill, an end mill, a replaceable cutting edge for milling, a replaceable cutting edge for turning, a metal saw, a tooth cutting tool, a reamer, a tap, etc. Not only can the abrasion be improved, but also the lubricity can be improved, and high slipperiness, high bakeability, and machining accuracy (surface finish state) of the work material can be improved. Can provide a long cutting tool.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration of a film forming apparatus used for forming a film in one embodiment of the present invention.

FIG. 2 is a top view showing a schematic configuration of a film forming apparatus for forming a film in one embodiment of the present invention.

[Explanation of symbols]

1: film forming apparatus, 2: chamber, 3: main table, 5a,
5b, 5c, 5d: arc evaporation sources, 6a, 6b, 6
c, 6d: cathode, 10: substrate, 11: jig

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hideki Moriguchi 1-1-1, Koyokita, Itami-shi, Hyogo Prefecture Inside Itami Works, Sumitomo Electric Industries, Ltd. (72) Inventor Shinya Imamura 1-1-1, Konokita, Itami-shi, Hyogo Prefecture No. 1 Sumitomo Electric Industries, Ltd. Itami Works (72) Inventor Hisanori Ohara 1-1-1, Koyo Kita, Itami City, Hyogo Prefecture Sumitomo Electric Industries, Ltd. Itami Works (72) Inventor Yasuhisa Hashimoto Kyoyo, Itami City, Hyogo Prefecture 1-1-1 Kita Sumitomo Electric Industries, Ltd. Itami Works F term (reference) 3C046 FF02 FF03 FF04 FF05 FF10 FF11 FF12 FF13 FF16 FF25 4K018 AD06 FA23 FA24 KA15 4K029 AA02 AA04 AA07 BA02 BA03 BA54 BA58 BB01 BB02 BC00 BD05 CA04 DD06 EA01

Claims (30)

[Claims] 1. A substrate, and two or more elements selected from the group consisting of titanium, chromium and aluminum and one or more members selected from the group consisting of carbon and nitrogen formed on the substrate. A cutting tool comprising: a wear-resistant coating containing a compound consisting of the following elements: and a lubricating coating formed so as to be in contact with the wear-resistant coating. 2. The lubricating film includes a hard carbon film.
The cutting tool according to claim 1. 3. The lubricating coating comprises a hard carbon film, titanium, chromium, zirconium, hafnium, vanadium,
The cutting tool according to claim 1, further comprising a non-carbon film containing at least one element selected from the group consisting of boron, aluminum, and silicon. 4. The cutting tool according to claim 3, wherein said hard carbon film and said non-carbon film are alternately laminated. 5. The lubricating coating comprises a hard carbon film, titanium, chromium, zirconium, hafnium, vanadium,
2. A compound film containing a compound comprising one or more elements selected from the group consisting of boron, aluminum and silicon and one or more elements selected from the group consisting of carbon, nitrogen and oxygen. The cutting tool according to 1. 6. The cutting tool according to claim 5, wherein the hard carbon films and the compound films are alternately laminated. 7. The cutting tool according to claim 1, wherein the thickness of the lubricating coating is 0.5 μm or more and 5 μm or less. 8. The abrasion-resistant coating comprises a compound comprising two or more elements selected from the group consisting of titanium, chromium and aluminum and one or more elements selected from the group consisting of carbon and nitrogen. The cutting tool according to any one of claims 1 to 7, comprising a plurality of layers composed of a film. 9. The cutting tool according to claim 1, wherein the thickness of the wear-resistant coating is 0.5 μm or more and 10 μm or less. 10. The abrasion resistant coating having a surface roughness of not less than 0.03 μm and not more than 0.5 μm in Ra.
The cutting tool according to any one of claims 1 to 9. 11. The outermost surface of the cutting tool is formed from one or more elements selected from the group consisting of titanium, chromium and aluminum and one or more elements selected from the group consisting of carbon, nitrogen and oxygen. The cutting tool according to any one of claims 1 to 10, wherein the cutting tool is coated with a film of a compound. 12. The base material is made of one material selected from the group consisting of tungsten carbide-based cemented carbide, cermet, ceramics, cubic boron nitride sintered body, diamond sintered body, and iron-based alloy. , Claim 1 to claim 11
The cutting tool according to any one of the above. 13. The cutting tool according to claim 12, wherein the ceramic is one selected from the group consisting of silicon carbide, silicon nitride, aluminum nitride, aluminum oxide, and silicon carbide. 14. The cutting tool according to claim 12, wherein the iron-based alloy is one selected from the group consisting of high-speed steel, die steel and stainless steel. 15. The cutting tool is one selected from the group consisting of a drill, an end mill, a tip-changeable insert for milling, a tip-changeable insert for turning, a metal saw, a gear cutting tool, a reamer and a tap. The cutting tool according to any one of claims 1 to 14. 16. A base material, and at least one element selected from the group consisting of titanium, zirconium and aluminum and one or more elements selected from the group consisting of carbon and nitrogen formed on the base material A cutting tool, comprising: a wear-resistant coating containing a compound consisting of the following elements: and a lubricating coating formed on and in contact with the wear-resistant coating. 17. The cutting tool according to claim 16, wherein the lubricating coating includes a hard carbon film. 18. The lubricating coating comprises a hard carbon film and a non-carbon film containing at least one element selected from the group consisting of titanium, chromium, zirconium, hafnium, vanadium, boron, aluminum and silicon. 17. The cutting tool according to claim 16, comprising: 19. The cutting tool according to claim 18, wherein said hard carbon film and said non-carbon film are alternately laminated. 20. The lubricating coating comprises a hard carbon film and one or more elements selected from the group consisting of titanium, chromium, zirconium, hafnium, vanadium, boron, aluminum and silicon, and carbon, nitrogen and oxygen. 17. The cutting tool according to claim 16, comprising a compound film containing a compound comprising at least one element selected from the group consisting of: 21. The cutting tool according to claim 20, wherein the hard carbon films and the compound films are alternately laminated. 22. The cutting tool according to claim 16, wherein the thickness of the lubricating coating is 0.1 μm or more and 5 μm or less. 23. The abrasion-resistant coating comprises at least one element selected from the group consisting of titanium, zirconium and aluminum and one or more elements selected from the group consisting of carbon and nitrogen.
23. Any one of claims 16 to 22 including a plurality of layers composed of a film of a compound comprising at least one kind of element.
Cutting tool according to the item. 24. The thickness of the wear-resistant coating is 0.1 μm.
The cutting tool according to any one of claims 16 to 23, wherein the cutting tool has a thickness of 10 m or more. 25. The abrasion-resistant coating having a surface roughness of 0.01 μm or more and 0.5 μm or less in terms of Ra.
The cutting tool according to any one of claims 6 to 24. 26. The outermost surface of the cutting tool, wherein one or more elements selected from the group consisting of titanium, zirconium, chromium and aluminum and one or more elements selected from the group consisting of carbon, nitrogen and oxygen The cutting tool according to any one of claims 16 to 25, wherein the cutting tool is coated with a film of a compound consisting of: 27. The base material is made of one material selected from the group consisting of tungsten carbide-based cemented carbide, cermet, ceramics, cubic boron nitride sintered body, diamond sintered body, and iron-based alloy. , From claim 16 to claim 2
6. The cutting tool according to any one of 6 to 6. 28. The cutting tool according to claim 27, wherein the ceramic is one selected from the group consisting of silicon carbide, silicon nitride, aluminum nitride, aluminum oxide, and silicon carbide. 29. The cutting tool according to claim 27, wherein the iron-based alloy is one selected from the group consisting of high-speed steel, die steel and stainless steel. 30. The cutting tool is one selected from the group consisting of a drill, an end mill, a cutting edge replaceable tip for milling, a cutting edge replaceable tip for turning, a metal saw, a tooth cutting tool, a reamer and a tap. The cutting tool according to any one of claims 16 to 29.