CN207998635U - A kind of AlTiN coatings and cutting tool with structure gradient - Google Patents
A kind of AlTiN coatings and cutting tool with structure gradient Download PDFInfo
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- CN207998635U CN207998635U CN201820134931.4U CN201820134931U CN207998635U CN 207998635 U CN207998635 U CN 207998635U CN 201820134931 U CN201820134931 U CN 201820134931U CN 207998635 U CN207998635 U CN 207998635U
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Abstract
The utility model is suitable for hard coat field, provide a kind of AlTiN coatings and cutting tool with structure gradient, the AlTiN coatings with structure gradient include TiN transition zones, AlTiN gradient layers and AlTiN stabilized zones, TiN transition zones bottom is attached to the surface of matrix, the bottom of the AlTiN gradient layers is attached to the top of the TiN transition zones, and the bottom of the AlTiN stabilized zones is attached to the top of the AlTiN gradient layers.The utility model additionally provides a kind of cutting tool, including cutter body, and one end of the cutter body is provided with cutting portion, and the cutting portion is provided with the above-mentioned AlTiN coatings with structure gradient.A kind of AlTiN coatings and cutting tool with structure gradient provided by the utility model, its AlTiN gradient layer Ti, Al content ratio change with the variation of thickness, the prepared AlTiN coatings that go out have preferable hardness and inoxidizability, and compact structure, the bond strength for enhancing coating and matrix improves the anti-strip ability of coating.
Description
Technical field
The utility model belongs to hard coat field more particularly to a kind of with the AlTiN coatings of structure gradient and cutting
Cutter.
Background technology
In recent years, Tool in Cutting technology is whole develops to high-speed dry type cutting direction, and DRY CUTTING is for environmental protection, drop
Low cost and consciously do not use cutting fluid, under the conditions of without cold liquid carry out machining cutting working method.Dry type is cut
It cuts and does not stop using cutting fluid not instead of simply, to ensure high efficiency, high yield quality while stopping using cutting fluid
Amount, the reliability of high tool life and cutting process, this dry cutting cutter for just needing performance excellent.Dry cutting
Not only to require cutter material have high red hardness and hot toughness, it is necessary to possess good wearability, heat shock resistance and
Anti-caking carries out coating treatment to cutter, is the important channel for improving cutting performance.In fact, coating has similar coolant liquid
Function, it can generate layer protective layer, cutter and cutting heat are kept apart, and heat is made seldom to be transmitted to cutter, to
Can keep in a longer period of time point of a knife it is hard with it is sharp, in drying cutting, cutter coat plays very important
Effect.
AlTiN coatings have high rigidity, high-wearing feature and excellent resistance to high temperature oxidation sexual function, are suitable for high-speed cutting
The materials such as high-alloy steel, titanium alloy, stainless steel.Tool surface prepare AlTiN coatings when, operating temperature at 400-500 DEG C,
And hardness, elasticity modulus and the coefficient of thermal expansion and hard alloy substrate of AlTiN has a larger difference, after cooling or later stage knife
During tool processing use, it is easy to lead to coating shedding because stress is excessive between coating and matrix.Traditional method be
Increase by one layer of TiN coating between AlTiN coatings and hard alloy substrate, TiN hardness falls between, makes as transition zone
With avoiding top layer AlTiN and matrix difference excessive, be easy to cause coating shedding.And AlTiN layers prepared by conventional method are one
Whole uniform material is whole, AlTiN layers between TiN layer, lattice solid solubility still remains larger difference, this brings two
A problem:1, the AlTiN layers of distortion of lattice ability to bear presence mutation between TiN layer, necessarily leads to two during cutter use
Bed boundary junction is weak;2, AlTiN layers and the easy presence cavity of TiN layer.Both of these problems can all lead to cutter in use, coating
Anti-strip ability is poor.
Utility model content
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of with structure gradient
AlTiN coatings and cutting tool, AlTiN coating surfaces have preferable hardness and inoxidizability, and compact structure, can enhance
The binding force of AlTiN coatings and cutting tool promotes the anti-strip ability of AlTiN coatings, improves the service life of cutting tool.
The technical solution of the utility model is:A kind of AlTiN coatings with structure gradient, including TiN transition zones,
AlTiN gradient layers and AlTiN stabilized zones, TiN transition zones bottom are attached to the surface of matrix, the AlTiN gradient layers
Bottom is attached to the top of the TiN transition zones, and the bottom of the AlTiN stabilized zones is attached to the top of the AlTiN gradient layers
Portion.
Specifically, the range of the overall thickness of the TiN transition zones, the AlTiN gradient layers and the AlTiN stabilized zones exists
In 0.3-5.5 μm.
Specifically, the range of the overall thickness of the TiN transition zones, the AlTiN gradient layers and the AlTiN stabilized zones exists
In 0.5-4.5 μm.
Specifically, the range of the thickness of the TiN transition zones is in 0.03-0.45 μm.
Specifically, the range of the thickness of the TiN transition zones is in 0.05-0.4 μm.
The utility model additionally provides a kind of cutting tool, including cutter body, and one end of the cutter body is provided with
Cutting portion, the cutting portion are provided with AlTiN coatings, the AlTiN coatings include TiN transition zones, AlTiN gradient layers and
AlTiN stabilized zones, TiN transition zones bottom are attached to the surface of the cutting portion, the bottom attachment of the AlTiN gradient layers
In the top of the TiN transition zones, the bottom of the AlTiN stabilized zones is attached to the top of the AlTiN gradient layers.
Specifically, the range of the overall thickness of the TiN transition zones, the AlTiN gradient layers and the AlTiN stabilized zones exists
In 0.3-5.5 μm.
Specifically, the range of the overall thickness of the TiN transition zones, the AlTiN gradient layers and the AlTiN stabilized zones exists
In 0.5-4.5 μm.
Specifically, the range of the thickness of the TiN transition zones is in 0.03-0.45 μm.
Specifically, the range of the thickness of the TiN transition zones is in 0.05-0.4 μm.
A kind of AlTiN coatings and cutting tool with structure gradient provided by the utility model, the AlTiN coating tables
There is preferable hardness and inoxidizability, compact structure can enhance the binding force of coating and cutting tool in face, promote AlTiN
The anti-strip ability of coating improves the service life of cutting tool.
Description of the drawings
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the utility model,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is a kind of structural schematic diagram for AlTiN coatings with structure gradient that the utility model embodiment provides;
Fig. 2 is a kind of system of the preparation method for AlTiN coatings with structure gradient that the utility model embodiment provides
Standby flow chart;
Fig. 3 is AlTiN deposition steps in a kind of AlTiN coatings with structure gradient that the utility model embodiment provides
Middle arc current change schematic diagram.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
It should be noted that when element is referred to as " being fixed on " or " being set to " another element, it can be directly another
On one element or it may be simultaneously present centering elements.When an element is known as " being connected to " another element, it can
To be directly to another element or may be simultaneously present centering elements.
Only it is each other relatively it should also be noted that, the orientation term such as left and right, upper and lower in the utility model embodiment
Concept or be reference with the normal operating condition of product, and should not be regarded as restrictive.
As shown in Figure 1, a kind of AlTiN coatings with structure gradient that the utility model embodiment provides, including TiN mistakes
Layer 1, AlTiN gradient layers 2 and AlTiN stabilized zones 3 are crossed, 1 bottom of TiN transition zones is attached to the surface of matrix 4, described
The bottom of AlTiN gradient layers 2 is attached to the top of the TiN transition zones 1, and the bottoms of the AlTiN stabilized zones 3 is attached to described
The top of AlTiN gradient layers 2, it is TiN transition zones 1, AlTiN gradient layers 2 and AlTiN stabilized zones 3 successively that matrix 4 is bottom-up,
Wherein, Ti contents are successively decreased from bottom to top in the AlTiN gradient layers 2, and Al content is from bottom in the AlTiN gradient layers 2
It is incremented by top, Ti, Al content are stable and greater than or equal to 2 top of the AlTiN gradient layers in the AlTiN stabilized zones 3
Ti, Al content.In AlTiN coatings, Al is present in the form of being dissolved in TiN lattices, if Al content is high, solid solution degree is got over
Height, then distortion of lattice resistance is bigger, and it is good to show as AlTiN coating hardness wearability, if Al content is low, solid solution degree is low,
The producible distortion degree of lattice is high, shows as the good toughness of AlTiN coatings.When preparing the AlTiN coatings, in AlTiN ladders
TiN transition zones 1 are provided between degree layer 2 and matrix 4, and the hardness of TiN transition zones 1 falls between, and plays transitional function,
Avoid the cutting portion difference of AlTiN gradient layers 2 and cutting tool is excessive from being easy to cause AlTiN coating sheddings, wherein AlTiN ladders
The ratio of Ti and Al content is variation to degree layer 2 in a thickness direction, and the bottom Al content of AlTiN gradient layers 2 is low, with TiN mistakes
The compatibility for crossing layer 1 is good, can eliminate TiN transition zones 11 and there is cavity, enhancing TiN transition zones 1 with 2 junction of AlTiN gradient layers
With the bond strength of AlTiN gradient layers 2, the anti-strip ability of AlTiN coatings is promoted, and there is AlTiN stabilized zones 3 high Al to contain
Amount ensures that AlTiN stabilized zones 3 have preferable hardness and inoxidizability, wear-resisting property good.
Specifically, the model of the overall thickness of the TiN transition zones 1, the AlTiN gradient layers 2 and the AlTiN stabilized zones 3
It is trapped among in 0.3-5.5 μm.
Specifically, the model of the overall thickness of the TiN transition zones 1, the AlTiN gradient layers 2 and the AlTiN stabilized zones 3
It is trapped among in 0.5-4.5 μm.
In the utility model embodiment, TiN transition zones 1, AlTiN gradient layers 2 and AlTiN stabilized zones 3 overall thickness it is excellent
Select range in 1-4 μm.
Specifically, the range of the thickness of the TiN transition zones 1 is in 0.03-0.45 μm.
Specifically, the range of the thickness of the TiN transition zones 1 is in 0.05-0.4 μm.
In the utility model embodiment, the preferred scope of the thickness of TiN transition zones 1 is in 0.1-0.3 μm, i.e. AlTiN ladders
The preferred scope of the overall thickness of layer 2 and AlTiN stabilized zones 3 is spent in 0.7-3.9 μm.
In practical application, various metals should be can be applied to the AlTiN coatings of structure gradient;It can also be applied to ceramics
Material surface.
The utility model additionally provides a kind of cutting tool, including cutter body (figure does not indicate), the cutter body
The one end of (figure does not indicate) is provided with cutting portion, and the cutting portion is provided with AlTiN coatings, and the AlTiN coatings include TiN
Transition zone 1, AlTiN gradient layers 2 and AlTiN stabilized zones 3,1 bottom of TiN transition zones are attached to the surface of the cutting portion,
The bottom of the AlTiN gradient layers 2 is attached to the top of the TiN transition zones 1, and the bottom of the AlTiN stabilized zones 3 is attached to
The top of the AlTiN gradient layers 2, bottom-up cutter body is that TiN transition zones 1, AlTiN gradient layers 2 and AlTiN are steady successively
Given layer 3.At work, the AlTiN stabilized zones 3 of high Al content can provide hardness guarantee to the cutting tool, and AlTiN coatings surface layer is past
Cutter body direction Al content continuously decreases, and lattice solid solubility reduces, and distortion of lattice ability improves, and cashes as AlTiN coatings
Toughness gradually increases, and anti-strip ability is promoted, and improves the service life of cutting tool.
As shown in Fig. 2, the utility model additionally provides a kind of preparation method of the AlTiN coatings with structure gradient, system
The standby above-mentioned AlTiN coatings with structure gradient, include the following steps:
S1. conductive on the conductive pivoted frame by 4 clamping of hard alloy substrate in PVD (physical vapour deposition (PVD)) coating furnace body
Pivoted frame insulate with furnace chamber, and furnace chamber itself is grounded, and the conduction pivoted frame rotation rotating speed is controlled by gear ratio, the conduction pivoted frame
Rotation rotating speed is 7-14rpm, and the conduction pivoted frame revolution rotating speed is 2-8rpm, by heating equipment to the PVD (physical vapors
Deposition) furnace chamber of coating furnace is heated to 470-500 DEG C, while to the PVD, (physical vapor is heavy by mechanical pump and molecular pump
Product) coating furnace is evacuated to 10^-3Pa;
S2. the cavity temperature for adjusting the PVD (physical vapour deposition (PVD)) coating furnace is reduced to 450-460 DEG C, is led to described
Electric pivoted frame is biased 600-900V and the bias is maintained to remain unchanged, and furnace chamber is zero potential at this time, toward the PVD (physics gas
Mutually depositing) coating furnace chamber is passed through the argon gas that throughput is 250-350sccm, and argon gas ionize under the action of potential difference as Ar+,
And 4 surface of hard alloy substrate is hit under the action of electric field, argon gas etching, the argon are carried out to the hard alloy substrate 4
Gas etches the duration as 9-12min, removes the dust etc. on 4 surface of the hard alloy substrate;
In the utility model embodiment, the conduction pivoted frame is biased 700-800V, and the throughput argon of argon gas is
300sccm, the setting value that gas etches the duration are 10min.
S3. after argon gas etching, it is 450-460 DEG C constant to keep the temperature of furnace chamber, by the throughput of argon gas by
250-350sccm is adjusted to 25-55sccm, opens Ti targets, and setting Ti target arc currents are 70-110A, and by bias by 600-
900V adjustment is reduced to 400-650V, and Ti targets ionize out Ti+ under the action of potential difference, and bombard hard under the action of electric field
4 surface of alloy substrate, to the progress metal ion etching of the hard alloy substrate 4, the metal ion etching duration is
9-17min removes 4 remained on surface grease of the hard alloy substrate etc., activates the surface of hard alloy substrate 4, can promote TiN
The binding force of transition zone 1 and hard alloy substrate 4;
In the utility model embodiment, the argon stream amount after adjustment is 30-50sccm, and Ti target arc currents are 80-
100A, the bias after adjustment are 500-600V, and metal ion etches duration ranges in 10-15min.
S4. after the metal ion etching, stopping is passed through argon gas, and bias is reduced to 60- by 400-650V adjustment
80V, while it is 120-140A that Ti targets arc current is increased by 70-110A adjustment, is passed through nitrogen, and maintain the PVD (physics gas
Mutually depositing) the furnace chamber air pressure of coating furnace is 0.9-1.2Pa, TiN deposition processes preparations are carried out to 4 surface of the hard alloy substrate
The TiN transition zones 1, the TiN duration of deposition are 20-30min;
S5. after the TiN depositions, by the furnace chamber nitrogen pressure of the PVD (physical vapour deposition (PVD)) coating furnace by 0.9-
1.2Pa adjustment, which increases, to be 3-5Pa and keeps stable, and bias is reduced to 55-60V by 60-80V adjustment, opens AlTi targets, setting
AlTi target arc currents carry out AlTiN deposition processes to 1 surface of TiN transition zones, during the AlTiN is deposited, including two
In the stage, the first stage is the Ti targets and the AlTi targets collective effect prepares the AlTiN gradient layers 2, realizes AlTiN gradients
Gradual transition, second stage work independently for the AlTi targets and realize that the AlTiN of high Al content is steady Al content from low to high in layer 2
The preparation of given layer 3, the AlTiN duration of deposition are 45-60min.
Specifically, in the step S3, the Ti targets can be pure Ti targets (purity 99.9wt.%).
Specifically, in the step S4, the nitrogen can be high pure nitrogen (purity 99.999%).
Specifically, in the step S4 and S5, the operating temperature of the furnace chamber of PVD (physical vapour deposition (PVD)) coating furnace can
It is 450 ± 1 DEG C.
Specifically, in the step S5, the AlTi targets can be atomic ratio Al:Ti=70:30 alloy target material, it is described
AlTiN deposition process, bias is gradually decrease to bias sets value, and the reduction process of bias is at the uniform velocity to change, and the bias is set
The preferred scope of definite value can be in 30-45V.
In the utility model embodiment, bias when AlTi targets are opened is set as 60V, bias gradually drops when AlTi targets are closed
Down to 35V, as shown in figure 3, i.e. in 20min, bias 60V, in 70min, bias 35V.
Specifically, during prepared by AlTiN gradient layers 2, Ti targets arc current can at the uniform velocity be reduced to Ti target arc current setting values,
AlTi targets arc current can at the uniform velocity be increased to AlTi target arc current setting values, and the arc current of Ti targets and AlTi targets works at the same time, and realize
The preferred scope of the gradual transition of Al content from low to high in AlTiN gradient layers 2, the Ti targets arc current setting value can be in 40-
In 60A, the preferred scope of the AlTi targets arc current setting value can be in 160-190A.
Specifically, the AlTiN gradient layers 2 Ti targets closing after the completion of preparing, the AlTi after the Ti targets closing
Target works on and keeps AlTi target arc current setting values constant, prepares the AlTiN stabilized zones 3 of high Al content.
Specifically, 2 preparation time of AlTiN gradient layers can be 15-25min, 3 preparation time of AlTiN stabilized zones
Can be 20-45min, it will of course be understood that ground, the preparation time of the preparation time and AlTiN stabilized zones 3 of AlTiN gradient layers 2
Can be other suitable ranges.
Specifically, the AlTiN gradient layers 2 are continuously decreased towards 3 direction of AlTiN stabilized zones, Ti contents, Al content by
Edge up height, i.e., the Ti contents of 2 bottom of AlTiN gradient layers are higher than the Ti contents at 2 top of AlTiN gradient layers, 2 bottom of AlTiN gradient layers
The Al content in portion keeps high Al content constant less than the Al content at the top of AlTiN gradient layers 2 in AlTiN stabilized zones 3, both
The binding force that TiN transition zones 1 and AlTiN gradient layers 2 can be enhanced, have can ensure AlTiN stabilized zones 3 have preferable hardness and
Inoxidizability.
Specifically, the range of the bottom Ti/Al of the AlTiN gradient layers 2 can be in 3.5-4.7, the AlTiN gradient layers
The range of 2 top Ti/Al can be in 0.45-0.7, it will of course be understood that ground, the bottom Ti/Al of the AlTiN gradient layers 2
Value may be other suitable ranges, the value of the top Ti/Al of the AlTiN gradient layers 2 may be that other are suitable
Range.
Specifically, the preferred scope of 2 bottom Ti/Al of AlTiN gradient layers can be in 4.0-4.2,2 top of AlTiN gradient layers
The preferred scope of Ti/Al can be in 0.5-0.65.
In the utility model embodiment, as shown in figure 3, the first stage of AlTiN depositions, prepares AlTiN gradient layers 2, from
20min is spent the time to during 40min to prepare AlTiN gradient layers 2, and after TiN depositions, Ti targets continue to run with, in arc power
Ti targets arc current is at the uniform velocity reduced to 50A by 120A under control, and sets the Ti targets when Ti targets arc current is 50A and is stopped,
AlTi targets are opened simultaneously, and AlTi targets arc current is at the uniform velocity increased to 175A by 50A and remained unchanged, and complete the system of AlTiN gradient layers 2
It is standby, wherein when 20min AlTi targets are opened, the preferred scope of Ti/Al ratios is closed in 4.0-4.2 in 40min TiN targets
When Ti/Al ratios preferred scope in 0.5-0.65;The second stage of AlTiN depositions, the AlTiN for preparing high Al content stablize
Layer 3, from 40min to 70min during to prepare AlTiN stabilized zones 3 spent the time, during which holding AlTi target arc currents 175A is not
Become, until completing the preparation of AlTiN stabilized zones 3, wherein in 40min-70min, i.e. AlTi targets work independently process, Ti/Al
Ratio preferred scope in 0.48-0.50.
A kind of AlTiN coatings and cutting tool with structure gradient that the utility model embodiment is provided, it can be achieved that
The content ratio of Ti, Al change with the variation of 2 thickness of AlTiN gradient layers, in aspect of performance, AlTiN coatings surface layer
High Al content ensures the high solid solubility of Al atoms in lattice, so that AlTiN coatings is had preferable hardness and inoxidizability, is tying
The Al content of resultant force aspect, AlTiN gradient layers 2 is grading structure, and the Al content of 2 bottom of AlTiN gradient layers is relatively low, with TiN mistakes
The compatibility for crossing layer 1 is good, enhances AlTiN gradient layers 2 and the excessive layer bond strengths of TiN, in use, when machining,
Coating is by cross shear, and the high Al content of AlTiN stabilized zones provides hardness for coating and ensures, from AlTiN gradient layers top
Portion to AlTiN gradient layers bottom Al content continuously decreases, and lattice solid solubility reduces, and distortion of lattice ability improves, and toughness gradually increases
By force, the anti-strip ability of AlTiN coatings gets a promotion, compact structure, can eliminate AlTiN gradient layers 2 and TiN transition zones 1
It is easy existing cavity, the service life of product is improved, has a wide range of application, practical function is good.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Any modification, equivalent replacement or improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (10)
1. a kind of AlTiN coatings with structure gradient, which is characterized in that including TiN transition zones, AlTiN gradient layers and AlTiN
Stabilized zone, TiN transition zones bottom are attached to the surface of matrix, and the bottom of the AlTiN gradient layers is attached to the TiN mistakes
The top of layer is crossed, the bottom of the AlTiN stabilized zones is attached to the top of the AlTiN gradient layers.
2. a kind of AlTiN coatings with structure gradient as described in claim 1, which is characterized in that the TiN transition zones,
The range of the overall thickness of the AlTiN gradient layers and the AlTiN stabilized zones is in 0.3-5.5 μm.
3. a kind of AlTiN coatings with structure gradient as claimed in claim 2, which is characterized in that the TiN transition zones,
The range of the overall thickness of the AlTiN gradient layers and the AlTiN stabilized zones is in 0.5-4.5 μm.
4. a kind of AlTiN coatings with structure gradient as described in claim 1, which is characterized in that the TiN transition zones
The range of thickness is in 0.03-0.45 μm.
5. a kind of AlTiN coatings with structure gradient as claimed in claim 4, which is characterized in that the TiN transition zones
The range of thickness is in 0.05-0.4 μm.
6. one end of a kind of cutting tool, including cutter body, the cutter body is provided with cutting portion, which is characterized in that institute
It states cutting portion and is provided with AlTiN coatings, the AlTiN coatings include TiN transition zones, AlTiN gradient layers and AlTiN stabilized zones,
TiN transition zones bottom is attached to the surface of the cutting portion, and the bottom of the AlTiN gradient layers is attached to the TiN mistakes
The top of layer is crossed, the bottom of the AlTiN stabilized zones is attached to the top of the AlTiN gradient layers.
7. a kind of cutting tool as claimed in claim 6, which is characterized in that the TiN transition zones, the AlTiN gradient layers
Range with the overall thickness of the AlTiN stabilized zones is in 0.3-5.5 μm.
8. a kind of cutting tool as claimed in claim 7, which is characterized in that the TiN transition zones, the AlTiN gradient layers
Range with the overall thickness of the AlTiN stabilized zones is in 0.5-4.5 μm.
9. a kind of cutting tool as claimed in claim 6, which is characterized in that the range of the thickness of the TiN transition zones exists
In 0.03-0.45 μm.
10. a kind of cutting tool as claimed in claim 9, which is characterized in that the range of the thickness of the TiN transition zones exists
In 0.05-0.4 μm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957413A (en) * | 2021-10-27 | 2022-01-21 | 赣州澳克泰工具技术有限公司 | Coated cutting tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957413A (en) * | 2021-10-27 | 2022-01-21 | 赣州澳克泰工具技术有限公司 | Coated cutting tool |
| CN113957413B (en) * | 2021-10-27 | 2023-09-22 | 赣州澳克泰工具技术有限公司 | Coated cutting tool |
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