CN102794484A - Surface-coated drill having excellent lubricating property and abrasion resistance - Google Patents
Surface-coated drill having excellent lubricating property and abrasion resistance Download PDFInfo
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- CN102794484A CN102794484A CN2012101646074A CN201210164607A CN102794484A CN 102794484 A CN102794484 A CN 102794484A CN 2012101646074 A CN2012101646074 A CN 2012101646074A CN 201210164607 A CN201210164607 A CN 201210164607A CN 102794484 A CN102794484 A CN 102794484A
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Abstract
The invention provides a surface-coated drill which can maintain a higher abrasion resistance even on a wet high-speed deep hole drill processing condition. The invention solves the above subject by the following method, namely, a surface-coated drill, which is composed of an N-component system, and uses a hard coating layer of which the thickness is 0.3-0.5 micrometers as a particle size composition control layer to be arranged on the surface of a drill matrix composed of a hard alloy sintering body or a high-speed steel, wherein (a), the content x of A1 in a film cross-section of the particle size composition control layer at the edge part of the drill is between 0.1 and 0.6, the surface-coated drill comprises a Ti region of which the content x is below 0.2 and an Al region of which the content x is more than 0.3, and (b) the aspect ratio A of the particles in the Ti region is between 1and 5, and the aspect ratio B of the particles in the Al region is between 10 and 70.
Description
Technical field
The present invention relates to a kind of surface of keeping excellent lubrication property and wearability for a long time and coat drill bit; Its leading section peripheral shape at drill main body becomes chip area; And the front end towards the inner peripheral surface of drill bit direction of rotation at this chip area is provided with cutting edge, is mainly used in the workpiece of being made up of the metal material processing of holing.
Background technology
As this drill bit is known following so-called twolip integral (drill) bit arranged: is that the center becomes the cutting blade around this axis to the front of the roughly cylindric drill main body of drill bit direction of rotation rotation with the axis; The 1 pair of chip area the periphery of this cutting blade form with the mode symmetrical along with front end face from this cutting blade about axis be the front end of drill main body after knife face towards rear end side around the helical form of axis to the rear side distortion of drill bit direction of rotation, and in the inner peripheral surface of these chip areas towards the front of the part of drill bit direction of rotation with said front end after the crest line portion of intersecting of knife face be formed with cutting edge.Therefore; In this integral (drill) bit; The front towards drill bit direction of rotation part of said chip area inner peripheral surface becomes the rake face of this cutting edge; The smear metal that generates through cutting edge is from the inner peripheral surface of this rake face sliding-contact chip area the time, sees off to rear end side and is discharged from through the distortion of this chip area.And, in this drill bit, further adopt the whole bag of tricks for the wearability that improves drill main body.
For example; Disclose the surface that the hard coating layer that has a following constituent concentration distributed architecture through formation improves wearability in the patent documentation 1 and coat drill bit: on thickness direction, repeat alternately to exist that Al is the highest contains a bit (Ti is minimum to be contained a bit) and contain a bit (Ti is the highest to be contained a bit) with Al is minimum, and Al (Ti) content is had a few, recurred variation a little the highest containing to Al minimum containing a bit from said Al from said Al the highest containing a bit to Al minimum containing across predetermined space.
And; Disclose in the patent documentation 2 like lower surface and coat drill bit: the outer circumference end through from cutting edge coats hard film to the scope of 3 * D with interior length M towards the D outer diameter of the relative cutting edge of rear end side, prevents to produce smear metal and stops up and can not produce and lose etc.
And, disclose in the patent documentation 3 like lower surface and coat drill bit: implement polishing processing after coating hard film through inner peripheral surface, prevent to produce the smear metal obstruction and can not produce and lose etc. at chip area.
And; Disclose in the patent documentation 4 like lower surface and coat drill bit: possess the clad that constitutes by outermost layer and internal layer at substrate surface; Outermost layer is made up of aluminium nitride or carbon aluminium nitride; Contain in the outermost layer greater than the chlorine below the 0 and 0.5 atom %, thereby lubricity and service life with excellence are longer.
And disclose in the patent documentation 5 like lower surface and coat drill bit: top layer is made up of CrOy (is 0.3≤y≤1.5 with atomic ratio measuring) and its thickness is the hard coating layer of 0.01～2.0 μ m through possessing, and improves anti-coagulability or deposit resistance property.
And; Disclose a kind of surface-coated cutting tool in the patent documentation 6; It is the hard coating layer that the complex nitride by Cr and Al of 0.8～5.0 μ m constitutes that said surface-coated cutting tool is formed with bed thickness at the surperficial vapor deposition of tool base; It is characterized in that this hard coating layer constitutes the alternatively layered structure of the thin layer B that constitutes by the thin layer A of the granular crystal organizational composition of the complex nitride of Cr and Al with by columanar structure, thin layer A and thin layer B have the bed thickness of 0.1～2 μ m respectively; And; The average crystal grain of granular crystal that constitutes above-mentioned thin layer A is directly for below the 30nm, and the average crystal grain that constitutes the column crystal of above-mentioned thin layer B directly is 50～500nm, and by composition formula (Cr
1-XAl
X) when N representes the complex nitride of above-mentioned Cr and Al, satisfy 0.55≤X≤0.75 (wherein X is an atomic ratio).
Patent documentation 1: the open 2003-326402 communique of Japan Patent
Patent documentation 2: the open 2003-275909 communique of Japan Patent
Patent documentation 3: the open 2003-275910 communique of Japan Patent
Patent documentation 4: the open 2005-297144 communique of Japan Patent
Patent documentation 5: the openly flat 8-132310 communique of Japan Patent
Patent documentation 6: the open 2010-94744 communique of Japan Patent
The automation of drill bit processing unit (plant) is remarkable in recent years; And the requirement to saving labourization, energy-conservationization, cost degradation and the efficient activity of drill bit processing is also strong; Follow this existence require high feeding, high cutting-in amount etc. more efficiently deep hole with the trend of drill bit processing; But present situation is as follows: coat in the drill bit on said surface in the past; Under usual conditions, various steel or cast iron are carried out drill bit and add and can not produce special problem man-hour, but when the wet type high speed deep hole of the chip area that needs lubrication property and wearability and smear metal to be prone to stop up drill bit uses in drill bit processing, in than the short period, reach service life because of smear metal is prone to the obstruction chip area.
Summary of the invention
Therefore, the inventor etc. are from considering like above-mentioned viewpoint, even for the surface coating drill bit of also keeping excellent lubrication property and wearability when in wet type high speed deep hole is processed with drill bit, using for a long time is provided, be conceived to by (Ti
1-XAl
X) hard coating layer that the composition system constitutes and average bed thickness is 0.3～5 μ m of N forms particle diameter that surface that key-course is present in the superficial layer of drill bit coats drill bit as particle diameter and form the result that the structure of key-course is furtherd investigate, and obtained following opinion.
(a) form containing with regard to the ratio x in the film cross section of key-course with regard to Al at the particle diameter of drill margin portion; The value of x is in 0.1～0.6 scope; Form at said particle diameter that to comprise x value more than at least 1 layer in the key-course respectively be that to contain the regional and x value of Ti be that the height of the stratiform more than 0.3 contains the Al zone for the height of the stratiform below 0.2; And
(b) to contain the asperratio A of the crystal grain in the Ti zone be 1～5 to height,
(c) to contain the asperratio B of the crystal grain in the Al zone be 10～70 o'clock to height; Discovery is compared with surface coating drill bit in the past, and the surface that possesses this hard coating layer coats drill bit and in wet type high speed deep hole machining, shows excellent lubrication property/wearability and the anti-cutter property that collapses.
And find when following formation, further to improve lubrication property, wearability and the anti-cutter property that collapses, that is, height contains the average bed thickness X in Ti zone
TiIn the scope of 30～100nm, and the high average bed thickness X that contains the Al zone
AlIn the scope of 30～100nm, and, the X of drill margin portion
TiFrom the zone of 5 times of distances of chisel edge to outside diameter, increasing gradually, and the X of drill margin portion
AlFrom the zone of 5 times of distances of chisel edge to outside diameter, reducing gradually.
Can form through following like aforesaid hard coating layer, be about in a kind the ion plating apparatus that utilizes barometric gradient type Ar plasma gun shown in the summary description figure that bit matrix is installed in Fig. 1 as the physical vapor deposition device,
The tool base temperature: 380～430 ℃,
Evaporation source 1: metal Ti,
Plasma gun discharge power to evaporation source 1: 9～12kW,
Evaporation source 2: metal A l,
Plasma gun discharge power to evaporation source 2: 7～8kW,
Reaction gas flow: nitrogen (N
2) gas 80～120sccm,
Discharge gas: argon (Ar) gas 30～35sccm,
Be added on the Dc bias of bit matrix outward :-15～-5V
Under such specified conditions; And with front end towards the direction setting tool matrix of pivot; Rotating shaft is rotated from the normal slope of siege loading surface 0 degree or 35～55 degree, and it is maximum and near the minimum wavy speed control mode of triangle in position of the siege of Al near the position of the siege of Ti to be made as rotating speed.Its result finds to possess the surface coating drill bit of established hard coating layer and compares with surface coating drill bit in the past, in wet type high speed deep hole machining, demonstrates excellent lubrication property and wearability.
The present invention accomplishes according to above-mentioned opinion, and it has following characteristic:
(1) a kind of surface of keeping higher wearability for a long time coats drill bit, by (Ti
1-XAl
X) hard coating layer that the composition system constitutes and average bed thickness is 0.3～5.0 μ m of N forms key-course as particle diameter and be present in the surface on the bit matrix that is made up of cemented carbide sintered body or high-speed steel directly or through the intermediate layer,
(a) value that contain ratio x of Al in the film cross section of the particle diameter composition key-course of the edge part of said drill bit is in the scope below 0.6 more than 0.1; Form at said particle diameter that to comprise x value more than at least 1 layer in the key-course respectively be that to contain the regional and x value of Ti be that the height of the stratiform more than 0.3 contains the Al zone for the height of the stratiform below 0.2; And
(b) to contain the asperratio A of the crystal grain in the Ti zone be 1～5 to said height, and,
(c) to contain the asperratio B of the crystal grain in the Al zone be 10～70 to said height.
(2) coat drill bit like (1) described surface, it is characterized in that said height contains the average bed thickness X in Ti zone
TiIn the scope of 30～100nm, and said height contains the average bed thickness X in Al zone
AlIn the scope of 30～100nm, and the X of drill margin portion
TiFrom the zone of 5 times of distances of chisel edge to outside diameter, increasing gradually, and the X of drill margin portion
AlFrom the zone of 5 times of distances of chisel edge to outside diameter, reducing gradually.
Below the present invention will be described.
On the bit matrix of coating drill bit in surface of the present invention, directly or through the intermediate layer form by (Ti
1-XAl
X) the composition system of N constitutes and average bed thickness is the hard coating layer of 0.3～5.0 μ m.Wherein, if the average bed thickness of hard coating layer less than 0.3 μ m, then can't be kept desirable wearability, on the other hand, if surpass 5 μ m, what then produce epithelium collapses cutter etc.Therefore, the average bed thickness of hard coating layer is defined as 0.3～5.0 μ m.
And, at the composition (Ti of hard coating layer
1-XAl
X) among the N, if the value that contains ratio x of Al is less than 0.1, then the wearability of Al is insufficient, if surpass 0.6, then becomes hexagonal crystal tissue, so can't keep the intensity that the crystallization of NaCl type has.Therefore, the value that contains ratio x of Al is defined as 0.1～0.6.
And height contains the value of asperratio A of the crystal grain in the Ti zone if surpass 5, then can't realize the stable cutting ability that columnar structure has.On the other hand, because the value of asperratio A is the value of long limit divided by minor face, therefore can be less than 1.Therefore, the value of asperratio A is defined as 1～5.
And if height contains the value of asperratio B of the crystal grain in the Al zone less than 10, then can't realize the wearability that grain structure has.On the other hand, the value of asperratio B then can't be kept the fracture resistence force with respect to shearing force if surpass 70.Therefore, the value of asperratio B is defined as 10～70.
Height contains the average bed thickness X in Ti zone
TiAnd the high average bed thickness X that contains the Al zone
AlValue if less than 30nm, lubrication property and the wearability that then can't bring into play separately to be had.On the other hand, if X
TiSurpass 100nm, then contain the Al zone with height and compare, the ratio that the relatively poor height of wearability contains the Ti zone becomes big relatively, contains the Ti region generating at height easily and destroys, and therefore can't keep desirable tool performance, and, if X
AlSurpass 100nm, then be directed in the aggregate-value that height contains the compression stress in Al zone and become excessive, become the reason that epithelium collapses cutter.Therefore, X
TiAnd X
AlValue be defined as 30～100nm.
In addition, said among the present invention " asperratio " is meant the value that the long boundary values of the line segment of the maximum diameter of measuring as the warp of each crystal grain of expression obtains divided by the minor face value of the maximum diameter of representing vertical direction with respect to long limit.
And; " from the zone of 5 times of distances of chisel edge to outside diameter " is meant that the central axes ground with drill bit is that starting point rearward is the direction metering of handle of a knife with bit cutting blade front end, the zone till the 5 double-length degree of the maximum gauge in the plane vertical with the bit central axle.
And, when in same mensuration zone, on thickness direction, having a plurality of high Ti of containing zone or a plurality of high Al of containing zone, separately mean value is made as X
Ti, X
Al
Surface of the present invention coats drill bit and has following characteristic: by (Ti
1-XAl
X) hard coating layer that the composition system constitutes and average bed thickness is 0.3～5.0 μ m of N forms key-course as particle diameter and be present in the surface on the bit matrix that is made up of cemented carbide sintered body or high-speed steel directly or through the intermediate layer; Wherein, (a) value that contain ratio x of Al in the film cross section of the particle diameter composition key-course of the edge part of said drill bit is in the scope below 0.6 more than 0.1; Having the x value is that to contain Ti zone and x value be that the height of the stratiform more than 0.3 contains the Al zone for the height of the stratiform below 0.2; And (b) to contain the asperratio A of the crystal grain in the Ti zone be 1～5 to said height, and; (c) to contain the asperratio B of the crystal grain in the Al zone be 10～70 to said height, thereby keep higher lubrication property, anti-cutter property and the wearability of collapsing for a long time.
And the present invention can come further to improve wearability through following formation: height contains the average bed thickness X in Ti zone
TiIn the scope of 30～100nm, and the high average bed thickness X that contains the Al zone
AlIn the scope of 30～100nm, and, the X of drill margin portion
TiFrom the zone of 5 times of distances of chisel edge to outside diameter, increasing gradually, and the X of drill margin portion
AlFrom the zone of 5 times of distances of chisel edge to outside diameter, reducing gradually.
Promptly; In the general deep hole machining, in the mechanics load more greatly and the stable on heating leading section of having relatively high expectations simultaneously, to contain the ratio in Ti zone greater than height; And constitute with columnar structure and to have the height that higher Al contains ratio and contain the Al zone, thereby keep higher wearability for a long time.On the other hand; At the chip area that more requires sliding properties or stable wearing and tearing form than mechanics load or the edge part at drill bit rear; Constitute for the further performance lubrication property that TiN had and with the lower grain structure of asperratio and to have the height that higher Ti contains ratio and contain the Ti zone, thereby can keep higher lubrication property for a long time with the state of keeping MIN wearability.And simultaneously; Through to range upon range of these zones of film thickness direction stratiform; Thereby the developing direction to the be full of cracks of film thickness direction development that mainly contains at the height that constitutes with columnar structure that the Al zone produces is disperseed through the fine grain structure that height contains the Ti zone, can improve the resistance to impact of epithelium.
And, X
TiFrom the zone of 5 times of distances of chisel edge to outside diameter, increasing gradually, and X
AlFrom the zone of 5 times of distances of chisel edge to outside diameter, reducing gradually, thereby from balancedly manifesting both effects to the instrument rear that requires lubrication property near the leading section that requires wearability, and then can prolong life tools.
And,, form ratio and asperratio and recur variation, perhaps X to film thickness direction according to the present invention
Al, X
TiTo drill bit shaft to changing gradually, thereby realize than cause by sandblast post processing or mask carry out the more extremely stable cutting of technology in the past that noncontinuity is handled, and realize long lifetime.According to general manufacturing approach; Even what change Al contains ratio x; Grain structure or columnar structure also not can because of Al contain ratio x by mastery change; But according to this method for making, matrix rotating mechanism and Ti evaporation source, Al evaporation source are made as special configuration, form the area with high mercury of Ti ion and the area with high mercury of Al ion; And the distance between evaporation source and the matrix changes and the speed of growth of hard coating layer changes, and coats drill bit thereby can make surface of the present invention with controllable state.
Description of drawings
Fig. 1 representes to be used for vapor deposition and forms the synoptic diagram of the ion plating apparatus that utilizes barometric gradient type Ar plasma gun that surface of the present invention coats the hard coating layer (particle diameter composition key-course) of drill bit.
Fig. 2 representes that surface of the present invention coats the schematic cross-section of the hard coating layer (particle diameter composition key-course) of drill bit.
Fig. 3 representes to be used for the synoptic diagram that vapor deposition forms the arc ion plating apparatus that in the past coated drill bit.
The specific embodiment
Then, through embodiment surface of the present invention being coated drill bit specifies.
[embodiment]
As material powder, prepare the WC powder of average grain diameter 0.8 μ m, the Cr of average grain diameter 2.3 μ m
3C
2The Co powder of the VC powder of powder, average grain diameter 1.5 μ m and average grain diameter 1.8 μ m; These material powders are fitted in the cooperation shown in the table 1 respectively to be formed; Add paraffin in addition and ball mill mixing 24 hours in acetone; After the drying under reduced pressure, punch forming is the various pressed compacts of reservation shape under 100MPa pressure, in the vacuum atmosphere of 6Pa; With 7 ℃/minute programming rates these pressed compacts are heated up into 1370～1470 ℃ of predetermined temperatures in the scope; After under this temperature, keeping 1 hour, under the stove cool condition, carry out sintering and form tool base and form and use the pole sintered body, and then produce WC base cemented carbide system bit matrix D-1～D-4 that size that the diameter * length with groove formation portion is 10mm * 80mm and twist angle are the 30 twolip shapes spent respectively from said pole sintered body through grinding.
Then; Cutting edge to these bit matrix D-1～D-4 is implemented the cutting edge reconditioning; Ultrasonic waves for cleaning in acetone is installed in a kind the ion plating apparatus that utilizes barometric gradient type Ar plasma gun as the physical vapor deposition device shown in Fig. 1 synoptic diagram under dry status,
The tool base temperature: 380～430 ℃,
Evaporation source 1: metal Ti,
Plasma gun discharge power to evaporation source 1: 9～12kW,
Evaporation source 2: metal A l,
Plasma gun discharge power to evaporation source 2: 7～8kW,
Reaction gas flow: nitrogen (N
2) gas 80～120sccm,
Discharge gas: argon (Ar) gas 30～35sccm,
Be added on the Dc bias of bit matrix outward :-15～-5V
Under the specified conditions shown in such table 2; With direction fixed drill bit matrix front end towards pivot; Coat drill bit 1～15 to the present invention; Normal slope 0 degree of revolution rotating shaft from the siege loading surface rotated; Coat drill bit 16～30 35～55 degree that tilt to the present invention and rotate, rotating speed be made as near the position of the siege of Ti maximum and near the minimum wavy speed control mode of triangle in position of the siege of Al, carry out thus evaporation reaction produce respectively be formed with have the composition shown in the table 2, and the particle diameter of table 4, the target bed thickness shown in 5, average asperratio the present invention surface of forming key-course coat drill bit 1～30.
And; Relatively to be purpose, cutting edge reconditioning, ultrasonic waves for cleaning in acetone are implemented in the surface of said bit matrix D-1～D-4; Under drying regime; In the arc ion plating apparatus that the Ti-Al alloy is installed as target as shown in Figure 3 with bit matrix keeping at the fixing state of vertical direction and to make its rotation, making its axle with this vertical simultaneously is the rotary middle spindle revolution, and
The tool base temperature: 360～430 ℃,
Target 1:Ti-Al alloy,
Arc discharge electric current to target 1: 50～130A,
Target 2:Ti-Al alloy,
Arc discharge electric current to target 2: 50～110A,
Reaction gas pressure: nitrogen (N
2) gas 5～10Pa,
Be added on the Dc bias of bit matrix :-25V outward
Under such condition, vapor deposition forms clad in the past, produces the comparison surface that is formed with the layer in the past with the average asperratio shown in composition shown in the table 3 and the table 6, target bed thickness on the surface of bit matrix D-1～D-4 respectively and coats drill bit 1～8.
Then, said the present invention surface coating drill bit 1～30 and comparison surface coating drill bit 1～8 are carried out
The sheet material of the JISSCr440 of workpiece-planar dimension: 100mm * 250mm, thickness: 80mm (HB250),
Cutting speed: 120m/min.,
Feed speed: 0.35mm/rev.,
Hole depth: 50mm
The wet type high speed drill deep hole cut test of the steel alloy under the condition (usually; Cutting speed and the feed speed of machining hole degree of depth 5D are respectively 110m/min. and 0.25mm/rev.), the back knife face abrasion width of front end cutting edge face is reached 0.3mm or the boring of the instrument that reaches till damaged adds number and measures.This mensuration result is illustrated in table 4,5,6 respectively.
[table 1]
The upgrading particle diameter that utilizes scanning electron microscope that resulting formation the present invention surface is coated the hard coating layer of drill bit 1～30 is formed key-course, and is constituted the average bed thickness of layer in the past that comparison surface coats the hard coating layer of drill bit 1～8 and carry out cross-section determination (mean values at 5 places), and the result all demonstrates in fact identical with target bed thickness mean value.
And; Through assembling the ion beam processing device the present invention surface coating drill bit 1～30, comparison surface are coated drill bit 1～8 and be processed into height to the bed thickness direction: the 2 times * width that is equivalent to bed thickness: after the thin slice of 5 μ m * thickness: 100nm; Under the condition of observing accelerating potential 200kV; Utilizing transmission electron microscope observation to constitute upgrading particle diameter that the present invention surface coats the hard coating layer of drill bit 1～30 forms key-course and constitutes after the particle diameter tissue of layer in the past of hard coating layer that comparison surface coats drill bit 1～8; The center line from the width of thin slice and the crosspoint of tool base to tool base generally perpendicularly towards the direction on epithelium surface; Measuring space with 10nm is formed; In fact affirmation has and table 2, the identical compositing range of target compositing range shown in 3 at the composition of each point, and the ratio x that contains that further measures Al is the average bed thickness X that the height below 0.2 contains the Ti zone more than 0.1
TiAnd high contain in the Ti zone contained by (Ti
1-xAl
x) the long limit and the minor face of the crystal grain that constitutes of the composition system of N, calculating asperratio A, the ratio x that contains that measures Al equally is that the height below 0.6 contains the regional average bed thickness X of Al more than 0.3
AlAnd high contain in the Al zone contained by (Ti
1-xAl
x) the long limit and the minor face of the crystal grain that constitutes of the composition system of N, calculating asperratio B is shown in table 4,5,6 with each result.In addition, said here long limit is meant the length of the line segment of the maximum length in the expression crystal grain, and minor face representes to have in the line segment vertical with long limit the length of the line segment of maximum length, and asperratio is the value of said long limit divided by said minor face.
Can know that from table 2,4, the result shown in 5 the present invention surface coats drill bit and is formed with by (Ti on top layer
1-xAl
x) particle diameter that constitutes of the composition system of N forms key-course; Its average bed thickness is 0.3～5 μ m, and Al forms containing in the scope of ratio x 0.1～0.6 in the film cross section of key-course at the particle diameter of drill margin portion, and having x value is that to contain the regional and x value of Ti be that the height of the stratiform more than 0.3 contains the Al zone for the height of the stratiform below 0.2; And; The asperratio A that height contains the crystal grain in the Ti zone is 1～5, and the high asperratio B that contains the crystal grain in the Al zone is 10～70, and height contains the average bed thickness X in Ti zone
TiIn the scope of 30～100nm, and height contains the average bed thickness X in Al zone
AlIn the scope of 30～100nm, the surface that therefore can be kept excellent lubrication property and wearability for a long time coats drill bit.
And can know the X of drill margin portion
TiFrom the zone of 5 times of distances of chisel edge to outside diameter, increasing gradually, and the X of drill margin portion
AlFrom the zone of 5 times of distances of chisel edge to outside diameter, reducing gradually, can kept the surface coating drill bit of excellent lubrication property and wearability thus for a long time.
Relative therewith; Can know from table 3, the result shown in 6; Contain the zone or have Ti at the Ti that does not have hard coating layer and Al height separately and be not controlled in the comparison surface coating drill bit of the layer in the past in the preset range with asperratio and the thickness that Al height separately contains the zone; Because lubrication property and wearability are insufficient, so, reach service life within a short period of time because of collapsing cutter, damaged, the generation of peeling off etc.
As aforementioned, surface of the present invention coats in the drill bit, by (Ti
1-XAl
X) hard coating layer that the composition system constitutes and average bed thickness is 0.3～5.0 μ m of N forms key-course as particle diameter and be present in the surface on the bit matrix that is made up of cemented carbide sintered body or high-speed steel directly or through the intermediate layer; The value that contain ratio x of Al in the film cross section of the particle diameter composition key-course of drill margin portion is in the scope below 0.6 more than 0.1; It is that the height of the stratiform more than 0.3 contains the Al zone that the height that in particle diameter is formed key-course, comprises x value more than at least 1 layer respectively and be the stratiform below 0.2 contains the regional and x value of Ti; And; The asperratio A that height contains the crystal grain in the Ti zone is 1～5; And the high asperratio B that contains the crystal grain in the Al zone is 10～70; Thereby possess excellent lubrication property is arranged, and, even this excellent lubrication property is also kept higher wearability at wet type high speed deep hole under with the drill bit processing conditions for a long time.
Claims (2)
1. a surface of keeping higher wearability for a long time coats drill bit, it is characterized in that, by (Ti
1-XAl
X) the composition system of N constitutes and bed thickness is that the hard coating layer of 0.3～5.0 μ m is formed key-course as particle diameter and is present in the surface on the bit matrix that is made up of cemented carbide sintered body or high-speed steel directly or through the intermediate layer,
(a) particle diameter of the edge part of said drill bit is formed value that the Al of key-course contains ratio x in the scope below 0.6 more than 0.1; Form at said particle diameter that to comprise x value more than at least 1 layer in the key-course respectively be that to contain the regional and x value of Ti be that the height of the stratiform more than 0.3 contains the Al zone for the height of the stratiform below 0.2; And
(b) to contain the asperratio A of the crystal grain in the Ti zone be 1～5 to said height, and,
(c) to contain the asperratio B of the crystal grain in the Al zone be 10～70 to said height.
2. surface as claimed in claim 1 coats drill bit, it is characterized in that,
Said height contains the average bed thickness X in Ti zone
TiIn the scope of 30～100nm, and said height contains the average bed thickness X in Al zone
AlIn the scope of 30～100nm, and, the X of drill margin portion
TiFrom the zone of 5 times of distances of chisel edge to outside diameter, increasing gradually, and the X of drill margin portion
AlFrom the zone of 5 times of distances of chisel edge to outside diameter, reducing gradually.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011115578 | 2011-05-24 | ||
| JP2011-115578 | 2011-05-24 | ||
| JP2012-112645 | 2012-05-16 | ||
| JP2012112645A JP2013006266A (en) | 2011-05-24 | 2012-05-16 | Surface-coated drill excellent in lubricating property and wear resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102794484A true CN102794484A (en) | 2012-11-28 |
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ID=47193925
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101646074A Pending CN102794484A (en) | 2011-05-24 | 2012-05-24 | Surface-coated drill having excellent lubricating property and abrasion resistance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004042192A (en) * | 2002-07-11 | 2004-02-12 | Sumitomo Electric Ind Ltd | Coated cutting tool |
| US20050227116A1 (en) * | 2002-06-25 | 2005-10-13 | Mitsubishi Materials Corporation | Coated cutting tool member |
| JP2006218592A (en) * | 2005-02-14 | 2006-08-24 | Mitsubishi Materials Corp | Surface coated cemented carbide cutting tool having hard covering layer exhibiting superior abrasion resistance in high speed cutting of high hardness steel |
| CN1864900A (en) * | 2006-06-16 | 2006-11-22 | 浙江汇锦梯尔镀层科技有限公司 | Hard film layer dedicated for micro-bore of flexible printed circuit board |
| CN100350070C (en) * | 2005-12-15 | 2007-11-21 | 西安理工大学 | Compound coating layer for improving micro drill service life and its preparation method |
| CN201728377U (en) * | 2010-05-21 | 2011-02-02 | 李固加 | Wear-resistant cutting tool |
-
2012
- 2012-05-24 CN CN2012101646074A patent/CN102794484A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050227116A1 (en) * | 2002-06-25 | 2005-10-13 | Mitsubishi Materials Corporation | Coated cutting tool member |
| JP2004042192A (en) * | 2002-07-11 | 2004-02-12 | Sumitomo Electric Ind Ltd | Coated cutting tool |
| JP2006218592A (en) * | 2005-02-14 | 2006-08-24 | Mitsubishi Materials Corp | Surface coated cemented carbide cutting tool having hard covering layer exhibiting superior abrasion resistance in high speed cutting of high hardness steel |
| CN100350070C (en) * | 2005-12-15 | 2007-11-21 | 西安理工大学 | Compound coating layer for improving micro drill service life and its preparation method |
| CN1864900A (en) * | 2006-06-16 | 2006-11-22 | 浙江汇锦梯尔镀层科技有限公司 | Hard film layer dedicated for micro-bore of flexible printed circuit board |
| CN201728377U (en) * | 2010-05-21 | 2011-02-02 | 李固加 | Wear-resistant cutting tool |
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