CN104668598B - Polycrystalline superhard cutting tool and preparation method thereof - Google Patents
Polycrystalline superhard cutting tool and preparation method thereof Download PDFInfo
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- CN104668598B CN104668598B CN201510069940.0A CN201510069940A CN104668598B CN 104668598 B CN104668598 B CN 104668598B CN 201510069940 A CN201510069940 A CN 201510069940A CN 104668598 B CN104668598 B CN 104668598B
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- forming tank
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/18—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing
- B23B27/20—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing with diamond bits or cutting inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/12—Boron nitride
- B23B2226/125—Boron nitride cubic [CBN]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetal Cutting Devices (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
The invention discloses a polycrystalline superhard cutting tool and a preparation method thereof. The polycrystalline superhard cutting tool comprises a cutting tool body part and an edge part, and the edge part is located at the intersection between more than two surfaces of the cutting tool body part; the materials of both the cutting tool body part and the edge part are polycrystalline material, and the average degree of crystallinity of the material of the edge part is higher than the average degree of crystallinity of the material of the cutting tool body part. Since the degree of crystallinity of the material of the edge part is higher than the degree of crystallinity of the material of the cutting tool body part in the polycrystalline superhard cutting tool disclosed by the invention, the stress of the edge is decreased, the hardness of the edge is increased, and thereby the service life of the cutting tool is prolonged. By adopting the metal induction process, the preparation method disclosed by the invention increases the degree of crystallinity of the edge, consequently, the stress of the edge is decreased, moreover, the hardness of the edge is increased, and thereby the service life of the cutting tool is prolonged; the process of the preparation method is simple, is convenient to operate, and is suitable for industrialized mass production.
Description
Technical field
The invention belongs to superhard cutter technical field, and in particular to a kind of glomerocryst superhard cutter, also relate to a kind of poly-
The preparation method of brilliant superhard cutter.
Background technology
In the machining of metal, the cutter for using is generally comprised by material point：Hard alloy cutter, sintex and
Glomerocryst superhard cutter.Wherein, glomerocryst superhard cutter hardness is high, long service life, particularly for finishing, realize with
Car generation mill, will not produce the metal waste residue for being difficult to recycle, improve working (machining) efficiency, realize Green Machining, therefore obtain
Extensively apply.
Conventional glomerocryst superhard cutter has polycrystal diamond cutter and polycrystalline CBN cutting tool etc., generally requires which
On knife bar, then knife bar is fixed on lathe, metal works are carried out with the processing such as turnning and milling plane.As shown in figure 1, glomerocryst
Superhard cutter (band chip-breaker 10) generally comprises cutter hub portion 1 and cutting edge portion 2, and the active component in cutting edge portion 2 is positive A angles, B
Angle, and the back side C angle relative with A angles, B angles, D angles；The active component in aforementioned four cutting edge portion participates in turning to workpiece etc.
Processing, after the cutting edge wear extent at the position exceedes certain numerical value, cutter is scrapped, that is, reached service life.
The cutting edge portion of cutter has higher stress, therefore can not be too sharp keen, in order to avoid process is being processed to workpiece
Middle cutter tipping；Traditional method be grind cutting edge after, then rounding process is carried out to cutting edge, makes cutting edge that there is certain radian.On
The method for stating reduction cutting edge stress has the disadvantage to make blade becoming dull, and in high-speed cutting, blade vibrations are big, i.e., what appearance was often said " shakes
Knife " phenomenon, the phenomenon are further degrading the abrasion of cutting edge, cause decreased tool life.
The content of the invention
It is an object of the invention to provide a kind of glomerocryst superhard cutter, what the existing cutter of solution was caused because cutting edge stress is higher makes
With the problem of short life.
Second object of the present invention is to provide a kind of preparation method of glomerocryst superhard cutter.
In order to realize object above, the technical solution adopted in the present invention is：
A kind of glomerocryst superhard cutter, including cutter hub portion and cutting edge portion, the cutting edge portion be connected in two, the cutter hub portion with
The intersection of upper surface；The cutter hub portion is polycrystalline material with cutting edge portion material, and the average crystallinity of cutting edge portion material is more than
The average crystallinity of cutter hub portion material.
The polycrystalline material is Polycrystalline Cubic Boron Nitride or polycrystalline diamond material.
The average crystallinity of cutting edge portion material is bigger by more than 10% than the average crystallinity of cutter hub portion material.
The average crystallinity in the cutting edge portion is 40%～60%；The average crystallinity in the cutter hub portion be 30%～
50%.
The cutting edge portion is the convex edge for being higher by cutter hub portion；Along the direction away from cutter hub portion, tapering width.
The cross section in the cutting edge portion is triangle, square or rectangular.
The degree of crystallinity edge of cutting edge portion material is gradually reduced towards the direction in the cutter hub portion.
The crystal region of cutting edge portion material is in layered distribution.
Along the direction away from the cutter hub portion, the material crystalline area of cutting edge portion is distributed in horizontal layer, and high-crystallinity
The crystallizing layer of crystallizing layer and low-crystallinity be spaced distribution.
Along the direction away from the cutter hub portion, the material crystalline area of cutting edge portion is in vertical layered distribution, and high-crystallinity
The crystallizing layer of crystallizing layer and low-crystallinity be spaced distribution.
The high-crystallinity refers to that degree of crystallinity is 50%～60%；The low-crystallinity refer to degree of crystallinity for 40%～
45%.
The width of the crystallizing layer is 0.3～0.5mm.
The degree of crystallinity of cutting edge portion crystallizing layer is all higher than cutter hub portion degree of crystallinity.
Material crystalline area of cutting edge portion is in layered distribution, while the structure makes cutting edge have low stress and high hardness,
Also there is excellent toughness, and the performance of excellent tissue cutting Crack Extension.
The glomerocryst superhard cutter of the present invention is with chip-breaker or the cutter without chip-breaker.
A kind of preparation method of above-mentioned glomerocryst superhard cutter, comprises the following steps：
1) mould of glomerocryst superhard cutter is taken, after inducing metal being put in the forming tank of mould, in shaping
Place shielding plate to seal forming tank at groove notch, type groove must be sealed to；
2) take step 2) obtained by be sealed to type groove heating anneal, after inducing metal is melted in the forming tank, be cooled to room
Temperature, inducing metal are deposited in each drift angle of forming tank, obtain the mould in forming tank with inducing metal layer；
3), after adding glomerocryst superhard cutter synthesis material in the forming tank with inducing metal layer, put at forming tank notch
Corresponding shielding plate is put, matched moulds assembles to form combination block, carry out HTHP synthesis, obtain final product.
The mould is graphite jig.Step 1) in, it is that shielding plate is placed on into forming tank by mould sealing
Notch is sealed；The shielding plate is graphite shielding plate.
The shaping groove shape of the mould according to required glomerocryst superhard cutter shape design, can for rhombus, three
It is angular, square etc..
The inducing metal is powder.
The inducing metal is alkali metal, alkaline-earth metal, any one or combination in acieral.Inducing metal is normal
Stable alkali metal under temperature, such as Mg etc., or acieral stable under normal temperature, such as Al-Ni, Al-Cr, Al-Mn, Al-Co are closed
Gold or the two combination.Inducing metal can be identical with the catalyst of synthesis material, it is also possible to different with the catalyst of synthesis material.
The synthesis material is the synthesis material of the conventional synthesis polycrystalline diamond in this area or Polycrystalline Cubic Boron Nitride.
Add inducing metal amount with its melt and cool down after can formed at drift angle on the groove face of each in forming tank
Thickness is not more than the metal level of 2.5mm and is advisable.Add the amount of inducing metal form specific continuous metal level very little；Add
The amount of inducing metal is not easy to excessively, and metal level when excessive on each groove face intersects generation serious, finally on top
Angle Position forms metallic object in heaps, is unfavorable for being subsequently formed the keen edge of blade.
Generally, degree of crystallinity is positive correlation with the amount of inducing metal；Crystal metal is more, the knot of polycrystalline material
Brilliant degree is higher.
Preferably, the thickness of inducing metal layer is 0.1～2.0mm.
The addition quality of inducing metal for molding cutter quality 0.5%～1.0%.
In having the mould of inducing metal layer in forming tank, individual layer inducing metal layer with the thickness ratio of molding cutter is
0.5～2.5:10～20.
Step 2) in, the heating anneal is will to be sealed to type groove and be put in annealing furnace made annealing treatment.The annealing
Process preferred vacuum annealing or inert atmosphere annealing.After inducing metal melting, each drift angle of forming tank is deposited in.
The heating anneal is will to be sealed to type groove to be heated to 650～1000 DEG C, is incubated 10～30min.
Step 2) in, the inducing metal layer in forming tank is modified, makes inducing metal layer that there is triangle, rectangular
Shape, trapezoidal or belt structure.The belt structure is that inducing metal layer band is spaced distribution with blank tape.
Step 3) in, the HTHP building-up process is the conventional high pressure apparatus high temperature and high pressure synthesis in this area, top pressure
Machine is cubic hinge press, octahedral high pressure apparatus etc..Raw material needed for HTHP synthesis be the conventional boron nitride powder in this area with
The mixture of catalyst.The catalyst be alkali metal, alkaline-earth metal and its nitride, or alkali metal, alkaline-earth metal boron nitridation
Thing, or the conventional catalyst such as acieral catalyst.
Step 3) in, matched moulds assemble to be formed combination block be put into synthesis material in forming tank after, be compacted and cover secondary height
Above-mentioned mould is covered conducting strip and is put into carbon cup by graphite flake up and down.
In the preparation method of above-mentioned glomerocryst superhard cutter, inducing metal powder is during high-temperature fusion, preferential to pile up
In the drift angle of forming tank, that is, the position of tool blade oral area during being molded, is formed, mechanism is：At high temperature, inducing metal powder
Generation is evaporated, and the metallic atom of evaporation falls and adsorbs in forming tank and form continuous metal film, the metallic atom for falling
Also there is certain probability desorption to occur and escapes again；At the drift angle of forming tank, such as the boundary of two intersecting trough inwall facades
At line, especially (i.e. the position of drift angle) at the joint of boundary line and forming tank lower planes, the metal of escape is easy to touch
Occur to deposit again to adjacent facade or adjacent plane, i.e., the probability that the metal at boundary line especially at joint is escaped compared with
It is little, so as to there occurs the preferential deposition of inducing metal.
The glomerocryst superhard cutter of the present invention, can be polycrystalline cubic boron nitride cutter or dimond synneusis cutter.This
Bright glomerocryst superhard cutter, can be solid tool, i.e. cutter generally polycrystalline material；Can also be brazed shank tool, Ji Jiangju
Brilliant material (being fixed with the cutter hub portion in cutting edge portion) is welded on hard alloy and forms cutter.
The glomerocryst superhard cutter of the present invention, including cutter hub portion and cutting edge portion, the cutting edge portion is located at two, the cutter hub portion
With the intersection of upper surface；The cutter hub portion is identical with cutting edge portion material, is polycrystalline cubic boron nitride or polycrystalline diamond material
Material, the degree of crystallinity of cutting edge portion material reduce the stress of cutting edge more than the degree of crystallinity of cutter hub portion material, and the hardness of cutting edge is improved,
Ensure that cutting edge portion has less stress and larger hardness in cutting, while the toughness in cutter hub portion will not be reduced, so as to prolong
Cutting-tool's used life is grown.
For polycrystalline material, degree of crystallinity is higher, and its inner potential is lower, and monocrystalline state is minimum energy state, and
Most stable of state.Under monocrystalline state, material internal has the stress of very little, thus stress induced glomerocryst is less likely to occur
Burst apart phenomenon, but the maximum sized cubic boron nitride monocrystal that can synthesize at present is still not enough to make blade.
The preparation method of the glomerocryst superhard cutter of the present invention, is put into inducing metal in the forming tank of mould, heats
Annealing makes inducing metal melt in forming tank, is cooled into inducing metal layer, adds glomerocryst superhard cutter synthesis material, carries out
HTHP synthesizes；The preparation method improves the degree of crystallinity of cutting edge by the technique using metal inducement, should so as to reduce cutting edge
Power, while improving edge hardness, extends cutting-tool's used life；The preparation method process is simple, it is easy to operate, it is adapted to big rule
Mould industrialized production.
Description of the drawings
Structural representations of the Fig. 1 for glomerocryst superhard cutter (with chip-breaker)；
Structural representations of the Fig. 2 for the glomerocryst superhard cutter of embodiment 1；
Sectional view figures of the Fig. 3 for Fig. 2；
Structural representations of the Fig. 4 for the mould of embodiment 1；
Fig. 5 is the enlarged drawing at A ' places in Fig. 4；
Structural representations of the Fig. 6 for the glomerocryst superhard cutter of embodiment 2；
Enlarged drawings of the Fig. 7 for the A ' places of the mould of embodiment 2；
Structural representations of the Fig. 8 for the glomerocryst superhard cutter of embodiment 5；
Structural representations of the Fig. 9 for the glomerocryst superhard cutter of embodiment 6.
Specific embodiment
With reference to specific embodiment, the present invention is further illustrated.
Embodiment 1
The glomerocryst superhard cutter of the present embodiment, as shown in Figure 2,3, Fig. 3 be Fig. 2 in along the cornerwise sectional views of AB, it is described
Glomerocryst superhard cutter includes cutter hub portion 1 and cutting edge portion 2, and the cutter hub portion 1 is rhombus, and the cutting edge portion 2 is the triangle bodily form, cutting edge
Portion 2 is connected in the intersection of 1 upper and lower surface of the cutter hub portion and side, and (at drift angle A, at other drift angles, same A, does not draw in figure
Go out)；The cutter hub portion is Polycrystalline Cubic Boron Nitride with cutting edge portion material, and the average crystallinity of cutting edge portion material is
48%, the average crystallinity of cutter hub portion material is 32%, and the average crystallinity of cutting edge portion material is more flat than cutter hub portion material
Degree of crystallinity is big by 16%；Along the direction (on cutter thickness direction) away from the cutter hub portion 1,2 material crystalline area of the cutting edge portion
It is distributed in horizontal layer, and the crystallizing layer 5 (width is 0.5mm) of high-crystallinity (average out to 52%) and low-crystallinity (average out to
40%) crystallizing layer 4 (width is 0.3mm) is spaced distribution.
The preparation method of the glomerocryst superhard cutter of the present embodiment, comprises the following steps：
1) take the mould of glomerocryst superhard cutter, the mould be graphite jig, on graphite jig be intended to into
The corresponding forming tank of the glomerocryst superhard cutter of type, (Mg powder, concrete addition are poly- to be put into inducing metal powder in forming tank
Brilliant superhard material synthesis material quality 0.7%) after, forming tank is sealed by placing graphite shielding plate at the forming tank notch, obtains close
Envelope forming tank；
2) take step 2) obtained by be sealed to type groove and be put in annealing furnace, being heated to 670 DEG C of insulation 20min carries out vacuum annealing
Process, after inducing metal is melted in forming tank, be cooled to room temperature, inducing metal is deposited in each drift angle of forming tank,
Each form continuous inducing metal layer on groove inwall at drift angle, inducing metal layer modified, as shown in Figure 4,5 (Fig. 4,5
In, 6 is mould, and 7 is forming tank, and A ' is forming tank drift angle corresponding with A angles on cutter, and a is forming tank groove bottom, b and c
For being molded groove sidewall), it is 0.6mm's to form width on forming tank 7 corresponding drift angle A ' places groove madial wall b, c for 0.5mm, thickness
Inducing metal layer with 8 with width for 0.3mm blank tape 9 be spaced, horizontal distribution (it is corresponding with target products formed, other push up
At angle, same A ', is not drawn in figure), obtain the mould in forming tank with inducing metal layer；
3) (synthesis material is by following matter to add glomerocryst superhard cutter synthesis material in the forming tank with inducing metal layer
The component composition of amount percentage composition：Boron nitride 90%, titanium carbide 5%, aluminium 4%, silicon 1%；5 μm of average grain diameter), after compacting into
Corresponding graphite shielding plate is placed at type groove notch and forms sub-assembly, prevent conducting strip up and down in the sub-assembly, be placed in carbon
Combination block is formed in cup, HTHP synthesis is carried out, the cutter blank for removing synthesis carries out surface polishing, obtained final product the glomerocryst and surpass
Hard cutting tool.
Embodiment 2
The glomerocryst superhard cutter of the present embodiment, difference from Example 1 is, as shown in fig. 6, along away from the cutter hub
The direction (on cutter thickness direction) in portion 1,2 material crystalline area of the cutting edge portion are in vertical layered distribution, and high-crystallinity is (average
It is spaced for crystallizing layer 4 (width is 0.3mm) of the crystallizing layer 5 (width is 0.4mm) 55%) with low-crystallinity (average out to 41%)
Arranged distribution.
The preparation method of the glomerocryst superhard cutter of the present embodiment, comprises the following steps：
1) take the mould of glomerocryst superhard cutter, the mould be graphite jig, on graphite jig be intended to into
The corresponding forming tank of the glomerocryst superhard cutter of type, be put in forming tank inducing metal powder (Al-Ni alloys, it is concrete to add
Measure for glomerocryst superhard cutter synthesis material quality 1.0%) after, placing graphite shielding plate is close by forming tank at the forming tank notch
Envelope, must be sealed to type groove；
2) take step 2) obtained by be sealed to type groove and be put in annealing furnace, being heated to 750 DEG C of insulation 30min carries out vacuum annealing
Process, after inducing metal is melted in forming tank, be cooled to room temperature, inducing metal is deposited in each drift angle of forming tank,
Each continuous inducing metal layer is formed on groove inwall at drift angle, inducing metal layer is modified, as shown in fig. 7, in shaping
The blank that the inducing metal layer band and width that width is 0.4mm, thickness is 1mm is 0.3mm is formed at groove A ' drift angles in groove bottom a
(, other drift angles at same A ' corresponding with target products formed, the inducing metal layer at C, D drift angle are located at graphite to spaced arranged distribution
On shielding plate), obtain the mould in forming tank with inducing metal layer；
3) (synthesis material is by following matter to add glomerocryst superhard cutter synthesis material in the forming tank with inducing metal layer
The component composition of amount percentage composition：Boron nitride 90%, titanium carbide 5%, aluminium 4%, silicon 1%；5 μm of average grain diameter), after compacting into
Corresponding graphite shielding plate is placed at type groove notch and forms sub-assembly, prevent conducting strip up and down in the sub-assembly, be placed in carbon
Combination block is formed in cup, HTHP synthesis is carried out, the cutter blank for removing synthesis carries out surface polishing, obtained final product the glomerocryst and surpass
Hard cutting tool.
Embodiment 3
The glomerocryst superhard cutter of the present embodiment, difference from Example 1 are that the cutter hub portion is equal with cutting edge portion material
For polycrystalline diamond material；Along the direction (cutter thickness direction) towards the cutter hub portion, the degree of crystallinity of cutting edge portion material
It is gradually reduced, degree of crystallinity is reduced to 43% from 55%, and average crystallinity is 50%；The degree of crystallinity of cutter hub portion material is
37%.
The preparation method of the glomerocryst superhard cutter of the present embodiment, comprises the following steps：
1) take the mould of glomerocryst superhard cutter, the mould be graphite jig, on graphite jig be intended to into
The corresponding forming tank of the glomerocryst superhard cutter of type, be put in forming tank inducing metal powder (Al-Cr alloys, it is concrete to add
Measure for glomerocryst superhard material synthesis material quality 0.7%) after, placing graphite shielding plate is close by forming tank at the forming tank notch
Envelope, must be sealed to type groove；
2) take step 2) obtained by be sealed to type groove and be put in annealing furnace, being heated to 730 DEG C of insulation 25min carries out vacuum annealing
Process, after inducing metal is melted in forming tank, be cooled to room temperature, inducing metal is deposited in each drift angle of forming tank,
Each continuous inducing metal layer is formed on groove madial wall at drift angle, inducing metal layer is modified, form rectangle, along court
To the direction (cutter thickness direction) in the cutter hub portion, the thickness of inducing metal layer is gradually reduced and (is reduced to from 0.4mm thickness
0.4mm thickness), obtain the mould in forming tank with inducing metal layer；
3) (synthesis material is comprising following to add glomerocryst superhard cutter synthesis material in the forming tank with inducing metal layer
The component of weight/mass percentage composition：Diamond 92%, cobalt 2%, nickel 3%；10 μm of average grain diameter), after compacting at forming tank notch
Place corresponding graphite shielding plate and form sub-assembly, conducting strip is prevented up and down in the sub-assembly, be placed in formation group in carbon cup
Block is closed, HTHP synthesis is carried out, the cutter blank for removing synthesis carries out surface polishing, obtains final product the glomerocryst superhard cutter.
Embodiment 4
The glomerocryst superhard cutter of the present embodiment, the cutter hub portion are Polycrystalline Cubic Boron Nitride with cutting edge portion material；
Difference from Example 1 is：Direction (with cutter thickness vertical direction) of the cutting edge portion edge towards the cutter hub portion,
The degree of crystallinity of cutting edge portion material is gradually reduced, and degree of crystallinity is reduced to 43% from 55%, and average crystallinity is 51%；The knife
The degree of crystallinity of body portion material is 40%.
The preparation method of the glomerocryst superhard cutter of the present embodiment, comprises the following steps：
1) take the mould of glomerocryst superhard cutter, the mould be graphite jig, on graphite jig be intended to into
The corresponding forming tank of the glomerocryst superhard cutter of type, be put in forming tank inducing metal powder (Al-Mg alloys, it is concrete to add
Measure for glomerocryst superhard material synthesis material quality 0.6%) after, placing graphite shielding plate is close by forming tank at the forming tank notch
Envelope, must be sealed to type groove；
2) take step 2) obtained by be sealed to type groove and be put in annealing furnace, being heated to 650 DEG C of insulation 25min carries out vacuum annealing
Process, after inducing metal is melted in forming tank, be cooled to room temperature, inducing metal is deposited in each drift angle of forming tank, right
Inducing metal layer is modified, and groove bottom and top surface (on graphite shielding plate) form right angled triangle at each drift angle, along direction
The direction (direction vertical with cutter thickness) in the cutter hub portion, the thickness of inducing metal layer are gradually reduced and (subtract from 1.0mm thickness
It is little to 0.5mm thickness), obtain the mould in forming tank with inducing metal layer；
3) (synthesis material is comprising following to add glomerocryst superhard cutter synthesis material in the forming tank with inducing metal layer
The component of weight/mass percentage composition：Cubic boron nitride 93%；It is aluminium nitride mainly in combination with agent；10 μm of average grain diameter), after compacting into
Corresponding graphite shielding plate is placed at type groove notch and forms sub-assembly, prevent conducting strip up and down in the sub-assembly, be placed in carbon
Combination block is formed in cup, HTHP synthesis is carried out, the cutter blank for removing synthesis carries out surface polishing, obtained final product the glomerocryst and surpass
Hard cutting tool.
Embodiment 5
The glomerocryst superhard cutter of the present embodiment, shown in such as Fig. 8 (enlarged drawing in cutting edge portion), is the cutter with chip-breaker 10
(outward just as Fig. 1), specifically processes chip-breaker 10 on the basis of 1 gained glomerocryst superhard cutter of embodiment.
Embodiment 6
The glomerocryst superhard cutter of the present embodiment, shown in such as Fig. 9 (enlarged drawing in cutting edge portion), is the cutter with chip-breaker 10
(outward just as Fig. 1), specifically processes chip-breaker 10 on the basis of 2 gained glomerocryst superhard cutter of embodiment.
Experimental example
This experimental example is detected to the performance of cutter obtained by embodiment 1-4.Detection method：Example 1-4 institutes
Cutter and comparative example cutter it is each 10, same model, cutting workpiece are diameter 150mm, the steel part of length 200mm, and cutting goes
Except thickness is 5mm, machining condition is：Cutting-in：0.2mm, feeding：0.1mm/round.After the completion of cutting measure after knife abrasion (after
Knife wear extent generally judges the standard that blade is scrapped), the mean value of the rear knife wear extent of ten embodiment blades is obtained, and it is right
The mean value contrast of ratio.Testing result is as shown in table 1.
The preparation method of wherein comparative example cutter is：Glomerocryst superhard cutter synthesis material is added in the forming tank of graphite jig
(Ju Ti Pei Fang with embodiment synthesize material formula), after compacting, placing graphite shielding plate forms sub-assembly at the forming tank notch,
The sub-assembly prevents conducting strip up and down, forms combination block in being placed in carbon cup, carries out HTHP synthesis, removes the knife of synthesis
Tool blank carries out surface polishing, obtains final product the glomerocryst superhard cutter.
1 performance testing result of table
As it can be seen from table 1 the rear knife abrasion of glomerocryst superhard cutter obtained by embodiment 1-4 is less than 0.4mm, well below
The rear knife wear extent of comparative example.Test result indicate that：The glomerocryst superhard cutter of the present invention, cutting edge portion have less in cutting
Stress and larger hardness, cutter have excellent performance and longer service life.
Claims (6)
1. a kind of glomerocryst superhard cutter, it is characterised in that：Including cutter hub portion and cutting edge portion, the cutting edge portion is connected in the cutter hub
The intersection on portion two or more surface；The cutter hub portion is polycrystalline material, the average knot of cutting edge portion material with cutting edge portion material
Average crystallinity of the brilliant degree more than cutter hub portion material;The crystal region of cutting edge portion material is in layered distribution;Along away from
The direction in the cutter hub portion, the material crystalline area of cutting edge portion are distributed in horizontal layer, and the crystallizing layer of high-crystallinity and low knot
The crystallizing layer of brilliant degree is spaced distribution；Or along the direction away from the cutter hub portion, the material crystalline area of cutting edge portion is in vertical
Layered distribution, and the crystallizing layer of high-crystallinity is spaced distribution with the crystallizing layer of low-crystallinity.
2. glomerocryst superhard cutter according to claim 1, it is characterised in that：The average crystallinity ratio of cutting edge portion material
The average crystallinity of cutter hub portion material is big by more than 10%.
3. a kind of preparation method of glomerocryst superhard cutter as claimed in claim 1, it is characterised in that：Comprise the following steps：
1）The mould of glomerocryst superhard cutter is taken, after inducing metal being put in the forming tank of mould, in forming tank groove
Place shielding plate to seal forming tank at mouthful, type groove must be sealed to；
2）Take step 1）Gained is sealed to type groove heating anneal, after inducing metal is melted in forming tank, is cooled to room temperature, lures
Each drift angle of metal accumulation in forming tank is led, the mould in forming tank with inducing metal layer is obtained；
3）After glomerocryst superhard cutter synthesis material is added in the forming tank with inducing metal layer, place right at forming tank notch
The shielding plate answered, matched moulds assemble to form combination block, carry out HTHP synthesis, obtain final product.
4. the preparation method of glomerocryst superhard cutter according to claim 3, it is characterised in that：The mould is graphite
Mould.
5. the preparation method of glomerocryst superhard cutter according to claim 3, it is characterised in that：The inducing metal is alkali gold
Any one in category, alkaline-earth metal, acieral or combination.
6. the preparation method of glomerocryst superhard cutter according to claim 3, it is characterised in that：Step 2）In, to forming tank
Interior inducing metal layer is modified, and makes inducing metal layer have triangle, rectangle, trapezoidal or belt structure.
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| CN201510069940.0A CN104668598B (en) | 2015-02-09 | 2015-02-09 | Polycrystalline superhard cutting tool and preparation method thereof |
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| CN201510069940.0A CN104668598B (en) | 2015-02-09 | 2015-02-09 | Polycrystalline superhard cutting tool and preparation method thereof |
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| CN115805666A (en) * | 2022-12-16 | 2023-03-17 | 汨罗市福缘新材料有限公司 | Fettling milling cutter suitable for graphite product |
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| AU2001236931A1 (en) * | 2000-02-14 | 2001-08-27 | U.S. Synthetic Corporation | Chip breaker design using polycrystalline diamond |
| CN2579573Y (en) * | 2002-11-27 | 2003-10-15 | 陈继峰 | Super thin poly crystal diamond layer diamond cutting tool |
| CN2850772Y (en) * | 2005-12-30 | 2006-12-27 | 河南富耐克超硬材料有限公司 | Superhard cutting blade |
| CN101096054A (en) * | 2006-06-28 | 2008-01-02 | 闪再青 | Ultra-hard cutting tool and processing method therefor |
| CN101168198A (en) * | 2006-10-27 | 2008-04-30 | 河南富耐克超硬材料有限公司 | Ultra-hard cutter |
| CN203156083U (en) * | 2013-03-19 | 2013-08-28 | 河南富耐克超硬材料股份有限公司 | Compound tool bit and cutter with compound tool bit |
| CN204094170U (en) * | 2014-08-01 | 2015-01-14 | 河南富耐克超硬材料股份有限公司 | A kind of Superhard composite materials and matrix thereof |
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