CN103008696B - Hard coating layer plays the excellent resistance to surface-coated cutting tool collapsing knife - Google Patents
Hard coating layer plays the excellent resistance to surface-coated cutting tool collapsing knife Download PDFInfo
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- CN103008696B CN103008696B CN201210338653.1A CN201210338653A CN103008696B CN 103008696 B CN103008696 B CN 103008696B CN 201210338653 A CN201210338653 A CN 201210338653A CN 103008696 B CN103008696 B CN 103008696B
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Abstract
The present invention provides hard coating layer in a kind of machining in high rate intermittent to play the excellent resistance to surface-coated cutting tool collapsing knife, fracture resistance.The surface-coated cutting tool of the present invention solves described problem by below scheme, and that is, hard coating layer is made up of the lower layer of chemical vapor deposition and upper layer,（a）Described lower layer is Ti compound layer, and described Ti compound layer at least includes 1 layer of Ti carbonitride layer and the Ti compound layer for having 1 layer or more than 2 layers of 3～20 μm of total average thickness；（b）Described upper layer is the alumina layer of the average thickness with 1～25 μm, and at least 1 layer Ti carbonitride layer constituting described lower layer has column longitudinal growth TiCN texture, and dispersed and distributed has microgranule TiCN in its tissue.
Description
Technical field
The present invention relates to a kind of surface-coated cutting tool（Hereinafter referred to as coating tool）, with hyperpyrexia generation and interrupted
Property or impact load act in the various steel of cutting edge or the high rate intermittent machining of cast iron, hard coating layer has excellent
Different resistance to collapse knife, thus playing excellent cutting ability by long-term use.
Background technology
In the past it is known that generally by tungsten carbide（Represented with WC below）Base cemented carbide or titanium carbonitride（Hereinafter use TiCN
Represent）The tool base that based ceramic metal is constituted（Hereinafter these are generically and collectively referred to as tool base）Surface formed by following（a）And
（b）The coating tool of the hard coating layer constituting：
（a）Lower layer is Ti compound layer, the Ti carbide that described Ti compound layer is formed by equal chemical vapor deposition（Hereinafter use
TiC represents）Layer, nitride（Hereinafter equally represented with TiN）Layer, carbonitride（Represented with TiCN below）Layer, oxycarbide（With
Lower TiCO represents）Layer and carbon nitrogen oxide（Represented with TiCNO below）1 layer or more than 2 layers in layer forms；And
（b）The aluminium oxide that upper layer is formed for chemical vapor deposition（Hereinafter use Al2O3Represent）Layer,
And this coating tool known is used in the machining of various steel or cast iron etc..
Wherein, described coating tool puts in larger load and easily collapses knife defect etc. under the machining condition of cutting edge
And there is a problem of that life tools are short etc, therefore in order to eliminate such problem, are currently suggested several motions.
For example, propose there is following scheme in patent documentation 1, constituted with the lamination of the monolayer of TiCN or more than 2 layers hard
Matter clad, and with as follows（a）~（c）Crystal structure in arbitrarily one kind or two or more crystal structure constitute these knot
1 layer in structure layer or more than 2 layers collapses knife improving the resistance to of coating tool：（a）Organize to longitudinal growth crystal from bulk crystalline
The crystal structure of tissue change；（b）Organize to longitudinal growth texture from bulk crystalline, further from this longitudinal growth crystal
Organize the crystal structure to bulk crystalline tissue change；And（c）From longitudinal growth texture to bulk crystalline tissue change
Crystal structure.
And, in patent documentation 2 propose have following scheme, hard coating layer by the TiCN layer including column crystal monolayer or
Multilamellar is constituted, and has the TiCN column crystal of the position of 1/5 distance from the upper end of this TiCN layer to this TiCN layer thickness
The TiCN of the position to 2/5 distance of this TiCN layer thickness for mean diameter d1 of horizontal direction and the lower end from this TiCN layer of grain
The ratio of mean diameter d2 of the horizontal direction of columnar grain is set to the structure of 1≤d1/d2≤1.3, thus provides and can bear bag
Include the coating tool of the long machining of interrupted cut.
Patent documentation 1：Japanese Patent Publication 6-8009 publication
Patent documentation 2：Japanese Patent Publication 10-109206 publication
It is following present situation at present：In recent years the saving labourization in machining and energy-saving are required strong, as it does so, becoming
Obtain under increasingly exacting terms using coating tool, the such as coating tool shown in described patent documentation 1,2, using
Act on the high rate intermittent machining of cutting edge in the load producing and further having intermittence or impact with hyperpyrexia
When, also due to the mechanical resistant impact of lower layer and resistance to sudden heating are insufficient, so because of high capacity during machining
Easily knife and defect is collapsed, its result reaches service life within the relatively short time on cutting edge.
Content of the invention
Therefore, the present inventor etc. from the viewpoint of as previously mentioned, produce and intermittence with hyperpyrexia to being used in shortly
Or the load of impact act on cutting edge high rate intermittent machining when, hard coating layer also possesses excellent impact absorbing
Property, its result plays the result that the excellent resistance to coating tool collapsing knife and fracture resistance is furtherd investigate by long-term use,
Obtain following opinion.
That is, as hard coating layer, it is formed with the cladding work of the lower layer of carbonitride layer including described conventional Ti
In tool, Ti carbonitride layer is in the form of a column in the vertical direction relative to matrix and is formed.Therefore, hardness and wearability are carried
Height, but its reverse side, the toughness of the carbonitride layer of the higher Ti of anisotropy of the carbonitride layer of Ti reduces, and result cannot be abundant
Performance is resistance to collapse knife and fracture resistance, and, also cannot be referred to as to meet the hard coating layer of life tools.
Therefore, the carbon nitrogen to the especially Ti in the Ti compound layer of the lower layer constituting hard coating layer such as the present inventor
The result that compound layer has made intensive studies, has obtained by relaxing the anisotropy of carbonitride layer of Ti and to improve tough
Property resistance to collapse knife and the opinion of novelty that fracture resistance improves to make hard coating layer.
Specifically, the carbonitride layer constituting at least 1 layer of Ti of lower layer has column longitudinal growth TiCN crystal group
Knit, and dispersed and distributed microgranule TiCN in its tissue, relaxed by the anisotropy of the carbonitride layer of this Ti, and toughness
It is improved（Hereinafter referred to as modified TiCN layer）.
And, the modified TiCN layer of foregoing structure for example can be by following chemical vapor deposition method come film forming.
To tool base surface, reacting gas is formed（Capacity %）It is set to TiCl4：1.7～1.9%, TDMAT（Four (two
Methylamino) titanium）：0.06～0.10%, CH3CN：0.7～0.9%, N2：20%th, H2：Residue, and reaction atmosphere pressure is set to 5
～12kPa, reaction atmosphere temperature is set to 820～970 DEG C to carry out chemical vapor deposition method such that it is able to obtain being dispersed with film micro-
The column longitudinal growth TiCN texture of grain TiCN.Here, in the present invention, microgranule TiCN refers to granular TiCN crystal phase or non-
The mixed phase of brilliant TiCN phase or granular TiCN crystal phase and amorphous TiCN phase.That is, with the carbon nitrogen of described chemical vapor deposition method film forming Ti
During compound layer, according to the delicate difference of membrance casting condition, confirm and disperse the microgranule TiCN being formed in film to have（1）For granular
The situation of TiCN crystal phase,（2）For the situation of amorphous TiCN phase,（3）Mixing for granular TiCN crystal phase and amorphous TiCN phase
The situation of phase.And, no matter further acknowledge that described（1）Extremely（3）In either case under, the described carbonitride layer of Ti
Anisotropy is relaxed and toughness is improved this effect and is not significantly different from.Therefore, in the present invention, will be described（1）Extremely
（3）It is generically and collectively referred to as microgranule TiCN.
And, when the surface density in the section of microgranule TiCN in the carbonitride layer of Ti has along thickness direction with cycle 0.5 μ
During the periodically variable surface density distributional pattern of m～5 μm, the relatively low region of the surface density due to there is microgranule TiCN, well
Play the characteristic of excellent hardness or the wearability of column longitudinal growth TiCN crystal etc, and due to there is the face of microgranule TiCN
The higher region of density, plays the characteristic of excellent impact absorbency based on microgranule TiCN etc well, can be with Gao Shui
Standard has both this above-mentioned characteristic.Therefore, especially when for hyperpyrexia produce and intermittence or impact load act on cutting edge
Steel or cast iron high rate intermittent machining when it has been found that hard coating layer have excellent resistance to collapse knife and fracture resistance and
Show excellent wearability by long-term use.
The present invention is completed based on described opinion, and it has following feature：
（1）A kind of surface in the tool base being made up of tungsten carbide base carbide alloy or base titanium carbonitride sets
It is equipped with the surface-coated cutting tool of hard coating layer, wherein,
Described hard coating layer is made up of the lower layer of chemical vapor deposition and upper layer,
（a）Described lower layer is Ti compound layer, and described Ti compound layer at least includes 1 layer of Ti carbonitride layer and for having
There is 1 layer or more than 2 layers of total average thickness of 3～20 μm of Ti compound layer；And
（b）Described upper layer is the alumina layer of the average thickness with 1～25 μm,
Constitute described（a）The carbonitride layer of at least 1 layer of Ti of lower layer has column longitudinal growth TiCN texture,
In its tissue, dispersed and distributed has microgranule TiCN, and this microgranule TiCN is granular TiCN crystal phase or amorphous TiCN phase or granular TiCN
The mixed phase of crystal phase and amorphous TiCN phase, the averaged particles width W of column longitudinal growth TiCN crystal is 50～2000nm, flat
All asperratio A is 5～50, and mean diameter R of described microgranule TiCN more than 50nm and is below 300nm.
（2）As（1）Described surface-coated cutting tool, wherein, is present at least 1 layer of Ti's constituting described lower layer
The surface density in the section of microgranule TiCN in carbonitride layer is 5～30%.
（3）As（1）Or（2）Described surface-coated cutting tool, wherein, the surface density tool in the section of described microgranule TiCN
Have along thickness direction with 0.5～5 μm of periodically variable surface density distributional pattern of cycle.
The present invention is described in detail below.
The Ti compound layer of lower layer：
At least include the carbonitride layer of Ti, and the carbide lamella of inclusion Ti, nitride layer, carbonitride layer, oxidation of coal
The lower layer of 1 layer in nitride layer and carbon nitrogen oxide layer or more than 2 layers of Ti compound layer can be in common chemical vapor deposition bar
Formed under part, but at least carbonitride layer of 1 layer of Ti is formed by additive method as be described hereinafter.Constitute the Ti compound of lower layer
Layer its own there is elevated temperature strength, because the presence of this Ti compound layer makes hard coating layer possess elevated temperature strength, in addition with work
Has matrix and by Al2O3The upper layer constituting all firmly adheres to, thus play being favorably improved hard coating layer to tool base
Adhesiveness effect, but if due to its add up to average thickness be less than 3 μm, cannot fully play above-mentioned effect, another
Aspect, if it adds up to average thickness more than 20 μm, easily collapses knife, is therefore added up to average thickness to be set to 3～20 μm.
At least carbonitride layer of 1 layer of Ti in lower layer：
In lower layer, at least the carbonitride layer of 1 layer of Ti is to have column longitudinal growth TiCN texture and in its tissue
The structure of interior dispersed and distributed microgranule TiCN.By being set to this structure, improve resistance to impact, show and excellent resistance to collapse knife
Property.However, each crystal grain to column longitudinal growth TiCN crystal, by the particle width in the direction parallel with matrix surface be set to w,
And when being averaged value and being set to averaged particles width W, if the maximum particle width of averaged particles width W is less than 50nm, cannot
Guarantee wearability by long-term use, on the other hand, if more than 2000nm, reduce because of the coarsening of particle resistance to collapse knife and
Fracture resistance.It is therefore preferable that the averaged particles width W of column longitudinal growth TiCN crystal is set to 50～2000nm.And, with regard to
Each crystal grain of column longitudinal growth TiCN crystal, the particle length in the direction vertical with matrix surface is set to l, and by described grain
The ratio of sub- width w and l is set to asperratio a of each crystal grain, in addition, by asperratio a calculated by each crystal grain
When meansigma methodss are set to Mean aspect size than A, if Mean aspect size is less than 5 than A, cannot guarantee as column longitudinal growth
The higher wearability of the feature of TiCN, on the other hand, if more than 50, toughness reduces on the contrary, and resistance to collapses knife and resistance to defect
Property reduce.It is therefore preferable that the Mean aspect size of column longitudinal growth TiCN crystal is set to 5～50 than A.The therefore present invention
In, during 1 particle of measurement column longitudinal growth TiCN crystal, the orientation maximum diameter in the direction parallel with matrix surface is referred to as
Particle width w, on the other hand, the orientation tangent line diameter in the direction vertical with matrix surface is referred to as particle length l.
And, with regard to microgranule TiCN, the particle diameter of each microgranule TiCN is set to r, and is averaged value be set to mean diameter R
When, if mean diameter R is less than 50nm, the effect to be improved resistance to impact by dispersed and distributed microgranule TiCN cannot be given full play to,
On the other hand, if more than 300nm, toughness reduces on the contrary.It is therefore preferable that mean diameter R of microgranule TiCN is set to exceed
50nm and be less than 300nm.Here, in the present invention, the long diameter of axle of the major diameter of the precipitated phase as each microgranule TiCN is referred to as
The particle diameter r of microgranule TiCN.
And, with regard to microgranule TiCN, if the surface density in section is less than 5%, cannot play dispersed and distributed microgranule TiCN's
Effect, on the other hand, if more than 30%, hinders the growth of column longitudinal growth TiCN crystal, and wearability reduces on the contrary.Cause
This, the surface density in the section of microgranule TiCN is preferably 5～30%.And, with regard to microgranule TiCN, by being set to surface density with the cycle
0.5～5 μm along thickness direction periodically variable surface density distributional pattern, and and non-uniform Distribution, thus improving resistance to further
Impact.
In addition, following, the carbonitride layer of the Ti being modified as previously mentioned is referred to as " modified TiCN layer ".
The Al of upper layer2O3Layer：
Constitute the Al of upper layer2O3Layer possesses high temperature hardness and thermostability is generally well known, if but its average thickness is little
In 1 μm, then cannot guarantee wearability by long-term use, on the other hand, if its average thickness is more than 25 μm, Al2O3Crystal grain is easy
In coarsening, as a result, high temperature hardness and elevated temperature strength reduce, and resistance to during high rate intermittent machining is collapsed knife and resistance to lacks
Damage property reduces, and is thus averaged thickness and is set to 1～25 μm.
The formation of the microgranule TiCN of dispersed and distributed：
By carrying out the chemistry of following condition in the forming process of the lower layer of film forming under the conditions of common chemical vapor deposition
Vapour deposition method can form the microgranule TiCN of the present invention.
It is added in reacting gas by the TDMAT of the core by becoming microgranule TiCN, form the microgranule TiCN of dispersed and distributed.
Reacting gas forms（Capacity %）：
TiCl4：1.7～1.9%,
TDMAT：0.06～0.10%
CH3CN：0.7～0.9%
N2：20%
H2：Remaining
Reaction atmosphere temperature：820～970 DEG C,
Reaction atmosphere pressure：5～12kPa
Contained modified TiCN layer in the lower layer of the present invention being formed under the conditions of described chemical vapor deposition shown in Fig. 1
The schematic diagram of microgranule TiCN distributional pattern.
And, by making the addition cyclically-varying of TDMAT, microgranule TiCN was formed as with surface density with the cycle 0.5
～5 μm along thickness direction periodically variable surface density distributional pattern.Its schematic diagram shown in Fig. 2.
It is described in more details according to Fig. 3.
Fig. 3 is to represent that the microgranule TiCN of the present invention being formed under the conditions of described chemical vapor deposition is in that periodically variable face is close
The surface density distributional pattern figure of in the lower layer of degree distribution, association between thickness direction position-surface density one.
This surface density distributional pattern figure can be obtained by the following method.
First, abreast lower layer is respectively divided into 0.1 μ m thick width regions with tool base surface（In Fig. 4, by
The region being separated with multiple parallel lines that tool base surface is abreast drawn is equivalent to 0.1 μ m thick width regions.）, and
Add up to the area measuring in 10 μ m shared by the microgranule TiCN being present in each thickness width region being divided in length, and profit
Use scanning electron microscope（50000 times of multiplying power）Measure, obtain the surface density in this 0.1 μm of thickness width region（%）, make
The surface density that each thickness width region is obtained is along thickness direction pictorialization, thus having made the face in thickness direction as shown in Figure 3
Density Distribution aspect graph.
Fig. 5 is to schematically illustrate column longitudinal growth TiCN texture in the layer column longitudinal growth TiCN crystal particles
Growth conditions figure.
In the present invention, with regard to the structure of dispersed and distributed microgranule TiCN in column longitudinal growth TiCN texture, due to
The presence of microgranule TiCN, when power puts on column longitudinal growth TiCN texture, brilliant in 11 column longitudinal growth TiCN
Deviate on body, therefore produce larger toughness.As a result, impact absorbency improves, and play and resistance to collapse knife and resistance to defect
Property improve etc effect.
The coating tool of the present invention, as hard coating layer, is made up of the lower layer and upper layer of chemical vapor deposition,（a）Institute
Stating lower layer is Ti compound layer, and described Ti compound layer at least includes 1 layer of Ti carbonitride layer and has 3～20 μm total
1 layer or more than the 2 layers Ti compound layer constituting of average thickness,（b）Described upper layer is to have 1～25 μm of average thickness
Alumina layer, the carbonitride layer constituting at least 1 layer of Ti of described lower layer has column longitudinal growth TiCN texture,
Dispersed and distributed microgranule TiCN in its tissue, thus producing and intermittence or impact with hyperpyrexia for steel or cast iron etc.
Property high capacity act on cutting edge high rate intermittent machining when, resistance to collapse knife and fracture resistance is excellent, its result is through long-term
Using and play excellent wearability, and reach the purpose of the long lifetime of coating tool.
Brief description
Fig. 1 represents the schematic diagram of the microgranule TiCN distributional pattern of the modified TiCN layer contained by the lower layer of the present invention.
Fig. 2 represents that the summary in the modified TiCN layer contained by the lower layer of periodically variable surface density distributional pattern is illustrated
Figure.
Fig. 3 represents the surface density distributional pattern figure of the association of thickness direction position-surface density of lower layer.
Fig. 4 represents the schematic diagram of the method for surface density distributional pattern figure obtaining Fig. 3 for explanation.
Fig. 5 represents and schematically illustrates column longitudinal growth TiCN texture in the layer column longitudinal growth TiCN crystal grain
The figure of the growth conditions of son.
Specific embodiment
Then, according to embodiment, the coating tool of the present invention is specifically described.
Embodiment
Prepare be respectively provided with 1～3 μm the WC powder of mean diameter, TiC powder, ZrC powder, VC powder, TaC powder, NbC
Powder, Cr3C2Powder, TiN powder and Co powder are as material powder, and these material powders are coordinated into the cooperation shown in table 1
Composition, and, add paraffin ball milling mixing 24 hours in acetone, after drying under reduced pressure, the pressure punch forming with 98MPa is
The pressed compact of reservation shape, and in the vacuum of 5Pa, holding 1 under the predetermined temperature in the range of 1370～1470 DEG C is little by this pressed compact
When under conditions of carry out vacuum-sintering, after sintering, to cutting edge portion implement R：The cutting edge reconditioning processing of 0.07mm, thus makes respectively
Produce the tool base A～E of the WC base cemented carbide with blade shapes specified in ISO CNMG120412.
And, prepare to be respectively provided with the TiCN of 0.5～2 μm of mean diameter（It is TiC/TiN=50/50 by quality ratio）Powder
End, Mo2C powder, ZrC powder, NbC powder, TaC powder, WC powder, Co powder and Ni powder as material powder, and by this
A little material powders coordinate into the cooperation composition shown in table 2, with ball mill wet mixed 24 hours, after being dried, with the pressure of 98MPa
Power punch forming is pressed compact, and by this pressed compact in the blanket of nitrogen of 1.3kPa, in temperature：Under conditions of 1540 DEG C keep 1 hour
It is sintered, after sintering, R is implemented to cutting edge portion：The cutting edge reconditioning processing of 0.09mm, thus form with iso standard
Tool base a～the e of the TiCN based ceramic metal of the blade shapes of CNMG120412.
Then, using common chemical evaporation plating device, on the surface of these tool base A～E and tool base a～e,
Carry out following operation to manufacture the coating tool 1～15 of the present invention.
（a）As the lower layer of hard coating layer, with the condition shown in table 3 and table 4 and the target thickness shown in table 6 evaporation
Form Ti compound layer.
（b）At this moment, under the conditions of the k～o shown in table 4, film forming is carried out to the carbonitride layer of the Ti constituting Ti compound layer
When, between the maxima and minima of TDMAT capacity % shown in table 4, while periodic variation addition, evaporation is formed
Ti compound layer.
（c）Then, under the conditions shown in Table 3, and with the target thickness evaporation shown in table 6 formed by upper layer（Al2O3
Layer）The hard coating layer constituting.
The modified TiCN layer at least 1 layer in the lower layer of the coating tool 1～10 of the described present invention, using scanning electron
Microscope（50000 times of multiplying power）The result that many visual fields are observed, confirms the film shown in Fig. 1 and constitutes the column crystal shown in schematic diagram
Grain circle and intragranular there is the membrane structure of microgranule TiCN.
And, in the lower layer of the coating tool 11～15 of the described present invention at least 1 layer modified TiCN layer, using sweeping
Retouch ultramicroscope（50000 times of multiplying power）The result that many visual fields are observed, confirms the film shown in Fig. 2 and constitutes the post shown in schematic diagram
There is the membrane structure of microgranule TiCN in grain circle of shape crystal and intragranular.
In addition, at least 1 layer modification TiCN layer in the lower layer of the coating tool 1～15 of the described present invention, using saturating
Penetrate ultramicroscope（200000 times of multiplying power）Many visual fields are observed and microgranule TiCN are carried out with the result of electronic diffraction, confirm described
Microgranule TiCN is the mixed phase of granular TiCN crystal phase or amorphous TiCN phase or granular TiCN crystal phase and amorphous TiCN phase.
And, for the purpose of comparing, on the surface of tool base A～E and tool base a～e, with shown in table 3 and table 5
Condition and table 7 shown in target thickness identically with the coating tool 1～15 of the present invention, evaporation formed as hard coating layer
Lower layer Ti compound layer.At this moment, when forming the carbonitride layer of the Ti constituting Ti compound layer, without TDMAT
And form column longitudinal growth TiCN texture.
Then, as the upper layer of hard coating layer, with the condition shown in table 3 and with the target thickness evaporation shown in table 7
Formed by Al2O3The upper layer that layer is constituted, thus make the comparison coating tool 1～15 of table 7.
And, utilize scanning electron microscope（5000 times of multiplying power）Measure coating tool 1～15 of the present invention and compare cladding
The thickness of each structure sheaf of instrument 1～15, the thickness of 5 points be averaged to obtain average thickness in measurement field of view
As a result, all represent and the average thickness of destination layer thickness actually identical shown in table 6 and table 7.
And, with regard to coating tool 1～15 of the present invention and compare coating tool 1～15, to tool base level
On direction, length adds up to the column longitudinal growth TiCN crystal existing in 10 μ m, similarly utilizes scanning electron microscope
（5000 times of multiplying power）Measure the particle width of the column longitudinal growth TiCN crystal of the carbonitride layer of composition Ti contained by lower layer
Degree w and particle length l, and obtain averaged particles width W and average asperratio A, averaged particles width W is to each crystal grain
The meansigma methodss of particle width w obtained, Mean aspect size is particle width w and particle length l that each crystal grain is obtained than A
Asperratio a to define for the ratio meansigma methodss.
And, with regard to coating tool 1～10 of the present invention, similarly utilize scanning electron microscope（50000 times of multiplying power）,
The carbonitride of the Ti contained by lower layer is measured in the thickness range suitable in TiCN thickness on the direction vertical with tool base
Area shared by microgranule TiCN present in layer, and with the direction of tool base level on add up in 10 μ m in length and survey
Determine the area shared by microgranule TiCN present in the carbonitride layer of Ti contained by lower layer, and obtain the surface density in section
（%）.
And, the coating tool 11～15 with regard to the present invention, similarly utilizes scanning electron microscope（Multiplying power 50000
Times）, the carbonitride layer of the Ti contained by lower layer and tool base surface are abreast respectively divided into 0.1 μm of thickness width
Region, and add up to, in length, the face measuring in 10 μ m shared by the microgranule TiCN being present in each thickness width region being divided
Long-pending, and obtain the surface density in the section of microgranule TiCN being present in this 0.1 μ m thick width regions（%）.
[table 1]
[table 2]
[table 6]
（Note 1）With regard to 11～15, due to the microgranule TiCN of l-TiCN section surface density on thickness direction alternately
In maximum and minimizing cyclically-varying simultaneously, therefore represent maximum and minimizing meansigma methodss respectively.
（Note 2）In hurdle*Labelling represents outside the scope of claim 2,**Labelling represents outside the scope of claim 3.
[table 7]
Then, with regard to described coating tool 1～15 of the present invention and compare coating tool 1～15, under the conditions shown in Table 8
Implement machining test, and all measure the wear of the tool flank width of cutting edge in each cutting test.
This measurement result is shown in table 9.
[table 9]
(the cutting test result comparing coating tool hurdle represents and reaches the cutting till the life-span because collapsing the reasons such as knife and defect
Time (minute))
Result shown in from table 6 and table 9 is clear that, in the coating tool of the present invention, constitutes the bottom of hard coating layer
The carbonitride layer of the Ti of layer has column longitudinal growth TiCN texture, and in its tissue, dispersed and distributed has microgranule TiCN,
Thus producing with hyperpyrexia for steel or cast iron etc., and intermittence or impact high capacity act on the high quick-break of cutting edge
During continuous machining, resistance to collapse knife and fracture resistance is excellent, its result plays excellent cutting ability by long-term use.
In contrast, non-dispersed and distributed has microgranule in the carbonitride layer constitute the Ti of lower layer of hard coating layer
It is clear that in the comparison coating tool 1～15 of TiCN, be used for producing with hyperpyrexia and intermittence or impact high capacity work
For cutting edge high rate intermittent machining when, reach service life at short notice because collapsing the generation of knife and defect etc..
Industrial applicability
As it was previously stated, the coating tool of the present invention for example produces and intermittence or impact with hyperpyrexia in steel or cast iron etc.
Property high capacity act in the high rate intermittent machining of cutting edge, play excellent resistance to knife and the fracture resistance and can of collapsing
Increase the service life.
Claims (2)
1. a kind of surface-coated cutting tool, it is in the work being made up of tungsten carbide base carbide alloy or base titanium carbonitride
Tool matrix surface be provided with hard coating layer it is characterised in that
Described hard coating layer is made up of the lower layer of chemical vapor deposition and upper layer,
A () described lower layer is Ti compound layer, described Ti compound layer at least includes 1 layer of Ti carbonitride layer and for having 3
1 layer of～20 μm of total average thickness or more than 2 layers of Ti compound layer；
B () described upper layer is the alumina layer of the average thickness with 1～25 μm,
At least 1 layer Ti carbonitride layer constituting described (a) lower layer has column longitudinal growth TiCN texture, in its group
Knitting interior dispersed and distributed has microgranule TiCN, and this microgranule TiCN is granular TiCN crystal phase or amorphous TiCN phase or granular TiCN crystal phase
With the mixed phase of amorphous TiCN phase, the averaged particles width W of column longitudinal growth TiCN crystal is 50～2000nm, Mean aspect
Size is 5～50 than A, and mean diameter R of described microgranule TiCN more than 50nm and is below 300nm,
The surface density in the section of described microgranule TiCN has along thickness direction with 0.5～5 μm of periodically variable surface density of cycle
Distributional pattern.
2. surface-coated cutting tool as claimed in claim 1 it is characterised in that
The surface density in the section of microgranule TiCN being present at least carbonitride layer of 1 layer of Ti constituting described lower layer is 5
～30%.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2011204228 | 2011-09-20 | ||
| JP2011-204228 | 2011-09-20 | ||
| JP2012-143114 | 2012-06-26 | ||
| JP2012143114A JP5928807B2 (en) | 2011-09-20 | 2012-06-26 | Surface coated cutting tool with excellent chipping resistance due to hard coating layer |
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| CN103008696A CN103008696A (en) | 2013-04-03 |
| CN103008696B true CN103008696B (en) | 2017-03-01 |
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| JP6414800B2 (en) * | 2014-02-26 | 2018-10-31 | 三菱マテリアル株式会社 | Surface-coated titanium carbonitride-based cermet cutting tool with excellent chipping resistance |
| CN109732398B (en) * | 2019-03-11 | 2020-02-21 | 广东工业大学 | Ultra-precision cutting optimization control method and system |
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| CN101557896A (en) * | 2006-12-25 | 2009-10-14 | 京瓷株式会社 | Surface-coated tool and method of working cutting object |
| JP2010284760A (en) * | 2009-06-12 | 2010-12-24 | Mitsubishi Materials Corp | Surface-coated cutting tool with hard coating layer exerting excellent chipping resistance in high-speed intermittent heavy cutting |
| JP2011173231A (en) * | 2010-01-27 | 2011-09-08 | Mitsubishi Materials Corp | Surface coated cutting tool having hard coating layer exhibiting excellent peel resistance, chipping resistance and abrasion resistance |
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| CN101445928A (en) * | 2002-08-08 | 2009-06-03 | 株式会社神户制钢所 | Alumina coating correlation technique with alpha type crystal structure |
| CN101557896A (en) * | 2006-12-25 | 2009-10-14 | 京瓷株式会社 | Surface-coated tool and method of working cutting object |
| CN101468401A (en) * | 2007-12-28 | 2009-07-01 | 三菱麻铁里亚尔株式会社 | Surface-coated cutting tool with hard coating layer having excellent abrasion resistance |
| JP2010284760A (en) * | 2009-06-12 | 2010-12-24 | Mitsubishi Materials Corp | Surface-coated cutting tool with hard coating layer exerting excellent chipping resistance in high-speed intermittent heavy cutting |
| JP2011173231A (en) * | 2010-01-27 | 2011-09-08 | Mitsubishi Materials Corp | Surface coated cutting tool having hard coating layer exhibiting excellent peel resistance, chipping resistance and abrasion resistance |
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