CN107598174A - A kind of integral sintered polycrystalline diamond button and preparation method thereof - Google Patents
A kind of integral sintered polycrystalline diamond button and preparation method thereof Download PDFInfo
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- CN107598174A CN107598174A CN201710949266.4A CN201710949266A CN107598174A CN 107598174 A CN107598174 A CN 107598174A CN 201710949266 A CN201710949266 A CN 201710949266A CN 107598174 A CN107598174 A CN 107598174A
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Abstract
The invention discloses a kind of integral sintered polycrystalline diamond button, the button is made up of outer wear layer and internal anti-impacting layer, and the outer layer of the internally positioned anti-impacting layer of outer wear layer, outer wear layer is made up of the raw material of following mass fraction：Diadust 70 95%, nickel powder 1 5%, silica flour 1 15%, cobalt powder 3 20%；Internal anti-impacting layer is made up of the raw material of following mass fraction：Diadust 40 70%, nickel powder 1 10%, silica flour 5 15%, cobalt powder 10 40%.The present invention is directed to future development demand, it is proposed that integral sintered polycrystalline diamond button, the raw material of this material are artificial synthesized, and with advances in technology, its price is also constantly reducing, therefore future will have very big prospect.
Description
Technical field
The invention belongs to button technical field, and in particular to a kind of integral sintered polycrystalline diamond button and its preparation side
Method.
Background technology
Geological prospecting at present, coal mining, oil exploitation etc. largely use button, improve operating efficiency.Button material
Species is a lot, in the past with high-speed steel, hard alloy is used greatly at present, partly using diamond hard alloy composite ball tooth.High-speed steel Yin Qinai
Mill property is inadequate, and short life has dropped out stage, the substitute is hard alloy spherical-teeth, hard alloy raw material processing in recent years one
Straight to go up, reason is that its storage is limited, non-renewable, therefore following hard alloy price meeting Continued, can bring cost
It is substantially improved.The appearance of diamond hard alloy composite ball tooth is to tackle the exploration of more hard formation, can improve bit life and operating efficiency, but
It is that diamond hard alloy composite ball tooth is using hard alloy as matrix, in compound strata diamond composite bed thereon, it is largely gone back
It is hard alloy, in the future or the problem of hard alloy raw material are rare can be faced.
The content of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, there is provided a kind of integral sintered polycrystalline diamond button and
Its preparation method.
The purpose of the present invention is realized in the following manner：
A kind of integral sintered polycrystalline diamond button, the button are made up of outer wear layer and internal anti-impacting layer, outside resistance to
The outer layer of the internally positioned anti-impacting layer of layer is ground, outer wear layer is made up of the raw material of following mass fraction：Diadust 70-
95%, nickel powder 1-5%, silica flour 1-15%, cobalt powder 3-20%；Internal anti-impacting layer is made up of the raw material of following mass fraction：Diamond
Micro mist 40-70%, nickel powder 1-10%, silica flour 5-15%, cobalt powder 10-40%.
The granularity of the diadust of the outer wear layer and internal anti-impacting layer is W40-W10.
The particle diameter of the nickel powder of the outer wear layer and internal anti-impacting layer, which is respectively less than, is equal to 300 mesh.
The particle diameter of the silica flour of the outer wear layer and internal anti-impacting layer, which is respectively less than, is equal to 400 mesh.
The particle diameter of the cobalt powder of the outer wear layer and internal anti-impacting layer, which is respectively less than, is equal to 400 mesh.
The preparation method of integral sintered polycrystalline diamond button described above, is comprised the following steps that：
（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour,
Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；
（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon
Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；
（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；
（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；
（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature is
650-750℃；
（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure
5-8GPa, 1100-1500 DEG C of sintering 3-6min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered glomerocryst
Diamond button.
The step（5）The volume ratio of middle hydrogen and argon gas is 3:7.
The particle diameter of the outer wear layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
The present invention proposes novel diamond button, and hardness is significantly larger than hard alloy spherical-teeth, and toughness is better than hard
Matter alloy, service life are more than ten times of hard alloy spherical-teeth, reduce a large amount of times for changing buttons, rate of penetration faster,
Therefore production efficiency can be greatly improved.It is layered and collapses broken in use present invention, avoiding diamond hard alloy composite ball tooth simultaneously
The problem of.Compression molding is taken in preparation technology, improves the initial density of base substrate, the higher polycrystalline diamond of consistency can be obtained
Sintered body, material property are substantially improved.
Relative to prior art, the present invention is directed to future development demand, it is proposed that integral sintered polycrystalline diamond button, this
The raw material of kind material are artificial synthesized, and with advances in technology, its price is also constantly reducing, therefore future will have
Very big prospect.
Brief description of the drawings
Fig. 1 is the vertical section schematic diagram of one of integral sintered polycrystalline diamond button prepared by the present invention.
Fig. 2 is the cross-sectional view of one of integral sintered polycrystalline diamond button prepared by the present invention.
Fig. 3 is two vertical section schematic diagram of integral sintered polycrystalline diamond button prepared by the present invention.
Fig. 4 is two cross-sectional view of integral sintered polycrystalline diamond button prepared by the present invention.
Fig. 5 is three vertical section schematic diagram of integral sintered polycrystalline diamond button prepared by the present invention.
Fig. 6 is three cross-sectional view of integral sintered polycrystalline diamond button prepared by the present invention.
Fig. 7 is four vertical section schematic diagram of integral sintered polycrystalline diamond button prepared by the present invention.
Fig. 8 is four cross-sectional view of integral sintered polycrystalline diamond button prepared by the present invention.
Wherein, 1 is outer wear layer；2 be internal anti-impacting layer.
Embodiment
Nickel powder plating can require that diadust manufacturer is preparing gold in this process of diadust surface
One layer of nickel powder of Direct Electroplating after hard rock micro mist, that is to say, that the commercially available diadust for having plating nickel powder.
As shown in figures 1-8, mould is different, and the structure of the button prepared is also different.
Button is cylinder, as shown in Figure 1.
Button bottom is cylinder, and top is hemisphere, and hemispheroidal diameter is equal with the diameter of the upper surface of cylinder,
The hemispheroidal centre of sphere is identical with the home position of the upper surface of cylinder, as shown in Figure 3.
Button is bullet-headed, as shown in Figure 7.
Button bottom is cylinder, and top is cone, and cone bottom surface diameter of a circle is justified straight with cylinder upper surface
Footpath is equal, and the center of circle of cone bottom surface circle is identical with the home position that cylinder upper surface is justified, as shown in Figure 5.
The cross section of the interface of outer wear layer 1 and internal anti-impacting layer 2 is the circular or circle with wave tooth, is such as schemed
2、4、6、8。
Wave tooth is rectangle, triangle or semicircle.
Embodiment 1：
A kind of integral sintered polycrystalline diamond button, the button are made up of outer wear layer 1 and internal anti-impacting layer 2, outside
The outer layer of the internally positioned anti-impacting layer 2 of wearing layer 1, outer wear layer 1 are made up of the raw material of following mass fraction：Diadust
70-95%, nickel powder 1-5%, silica flour 1-15%, cobalt powder 3-20%；Internal anti-impacting layer 2 is made up of the raw material of following mass fraction：Gold
Hard rock micro mist 40-70%, nickel powder 1-10%, silica flour 5-15%, cobalt powder 10-40%.
The granularity of the diadust of outer wear layer 1 and internal anti-impacting layer 2 is W40-W10.
The particle diameter of the nickel powder of outer wear layer 1 and internal anti-impacting layer 2, which is respectively less than, is equal to 300 mesh.
The particle diameter of the silica flour of outer wear layer 1 and internal anti-impacting layer 2, which is respectively less than, is equal to 400 mesh.
The particle diameter of the cobalt powder of outer wear layer 1 and internal anti-impacting layer 2, which is respectively less than, is equal to 400 mesh.
The preparation method of integral sintered polycrystalline diamond button described above, is comprised the following steps that：
（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour,
Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；
（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon
Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；
（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；
（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；
（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature is
650-750℃；Impurity and oxygen in button of going out entity etc.；
（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure
5-8GPa, 1100-1500 DEG C of sintering 3-6min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered glomerocryst
Diamond button.
Step（5）The volume ratio of middle hydrogen and argon gas is 3:7.
The particle diameter of outer wear layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
Embodiment 2：
A kind of integral sintered polycrystalline diamond button, the button are made up of outer wear layer 1 and internal anti-impacting layer 2, outside
Wearing layer 1 is made up of the raw material of following mass fraction：Diadust 90%, nickel powder 1%, silica flour 2%, cobalt powder 7%；Internal shock resistance
Layer 2 is made up of the raw material of following mass fraction：Diadust 70%, nickel powder 2%, silica flour 7%, cobalt powder 21%.
The granularity of the diadust of outer wear layer 1 is W40, and the granularity of the diadust of internal anti-impacting layer 2 is
W40。
The particle diameter of the nickel powder of outer wear layer 1 and internal anti-impacting layer 2 is 300 mesh.
The particle diameter of the silica flour of outer wear layer 1 and internal anti-impacting layer 2 is 400 mesh.
The particle diameter of the cobalt powder of outer wear layer 1 and internal anti-impacting layer 2 is 400 mesh.
The preparation method of integral sintered polycrystalline diamond button described above, is comprised the following steps that：
（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour,
Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；
（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon
Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；
（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；
（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；
（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature 650
℃；Impurity and oxygen in button of going out entity etc.；
（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure
7GPa, 1300 DEG C of sintering 5min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered polycrystalline diamond ball
Tooth.
Step（5）The volume ratio of middle hydrogen and argon gas is 3:7.
The particle diameter of outer wear layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
Embodiment 3：
A kind of integral sintered polycrystalline diamond button, the button are made up of outer wear layer 1 and internal anti-impacting layer 2, outside
Wearing layer 1 is made up of the raw material of following mass fraction：Diadust 84%, nickel powder 2%, silica flour 11%, cobalt powder 3%；Internal anti-impact
Layer 2 is hit to be made up of the raw material of following mass fraction：Diadust 65%, nickel powder 9%, silica flour 10%, cobalt powder 16%.
The granularity of the diadust of outer wear layer 1 is W40, and the granularity of the diadust of internal anti-impacting layer 2 is
W40。
The particle diameter of the nickel powder of outer wear layer 1 and internal anti-impacting layer 2 is 325 mesh.
The particle diameter of the silica flour of outer wear layer 1 and internal anti-impacting layer 2 is 460 mesh.
The particle diameter of the cobalt powder of outer wear layer 1 and internal anti-impacting layer 2 is 460 mesh.
The preparation method of integral sintered polycrystalline diamond button described above, is comprised the following steps that：
（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour,
Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；
（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon
Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；
（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；
（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；
（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature 670
℃；Impurity and oxygen in button of going out entity etc.；
（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure
6GPa, 1200 DEG C of sintering 4min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered polycrystalline diamond ball
Tooth.
Step（5）The volume ratio of middle hydrogen and argon gas is 3:7.
The particle diameter of outer wear layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
Embodiment 4：
A kind of integral sintered polycrystalline diamond button, the button are made up of outer wear layer 1 and internal anti-impacting layer 2, outside
Wearing layer 1 is made up of the raw material of following mass fraction：Diadust 70%, nickel powder 5%, silica flour 10%, cobalt powder 15%；Internal anti-impact
Layer 2 is hit to be made up of the raw material of following mass fraction：Diadust 56%, nickel powder 10%, silica flour 13%, cobalt powder 21%.
The granularity of the diadust of outer wear layer 1 is W28, and the granularity of the diadust of internal anti-impacting layer 2 is
W20。
The particle diameter of the nickel powder of outer wear layer 1 and internal anti-impacting layer 2 is 400 mesh.
The particle diameter of the silica flour of outer wear layer 1 and internal anti-impacting layer 2 is 540 mesh.
The particle diameter of the cobalt powder of outer wear layer 1 and internal anti-impacting layer 2 is 540 mesh.
The preparation method of integral sintered polycrystalline diamond button described above, is comprised the following steps that：
（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour,
Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；
（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon
Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；
（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；
（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；
（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature 690
℃；Impurity and oxygen in button of going out entity etc.；
（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure
7GPa, 1200 DEG C of sintering 6min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered polycrystalline diamond ball
Tooth.
Step（5）The volume ratio of middle hydrogen and argon gas is 3:7.
The particle diameter of outer wear layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
Embodiment 5：
A kind of integral sintered polycrystalline diamond button, the button are made up of outer wear layer 1 and internal anti-impacting layer 2, outside
Wearing layer 1 is made up of the raw material of following mass fraction：Diadust 75%, nickel powder 3%, silica flour 6%, cobalt powder 16%；Internal anti-impact
Layer 2 is hit to be made up of the raw material of following mass fraction：Diadust 49%, nickel powder 6%, silica flour 15%, cobalt powder 30%.
The granularity of the diadust of outer wear layer 1 is W20, and the granularity of the diadust of internal anti-impacting layer 2 is
W10。
The particle diameter of the nickel powder of outer wear layer 1 and internal anti-impacting layer 2 is 460 mesh.
The particle diameter of the silica flour of outer wear layer 1 and internal anti-impacting layer 2 is 650 mesh.
The particle diameter of the cobalt powder of outer wear layer 1 and internal anti-impacting layer 2 is 650 mesh.
The preparation method of integral sintered polycrystalline diamond button described above, is comprised the following steps that：
（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour,
Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；
（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon
Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；
（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；
（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；
（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature 710
℃；Impurity and oxygen in button of going out entity etc.；
（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure
8GPa, 1400 DEG C of sintering 3min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered polycrystalline diamond ball
Tooth.
Step（5）The volume ratio of middle hydrogen and argon gas is 3:7.
The particle diameter of outer wear layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
Embodiment 6：
A kind of integral sintered polycrystalline diamond button, the button are made up of outer wear layer 1 and internal anti-impacting layer 2, outside
Wearing layer 1 is made up of the raw material of following mass fraction：Diadust 80%, nickel powder 1%, silica flour 15%, cobalt powder 4%；Internal anti-impact
Layer 2 is hit to be made up of the raw material of following mass fraction：Diadust 40%, nickel powder 10%, silica flour 10%, cobalt powder 40%.
The granularity of the diadust of outer wear layer 1 is W14, and the granularity of the diadust of internal anti-impacting layer 2 is
W14。
The particle diameter of the nickel powder of outer wear layer 1 and internal anti-impacting layer 2 is 540 mesh.
The particle diameter of the silica flour of outer wear layer 1 and internal anti-impacting layer 2 is 800 mesh.
The particle diameter of the cobalt powder of outer wear layer 1 and internal anti-impacting layer 2 is 800 mesh.
The preparation method of integral sintered polycrystalline diamond button described above, is comprised the following steps that：
（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour,
Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；
（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon
Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；
（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；
（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；
（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature 730
℃；Impurity and oxygen in button of going out entity etc.；
（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure
5GPa, 1300 DEG C of sintering 5min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered polycrystalline diamond ball
Tooth.
Step（5）The volume ratio of middle hydrogen and argon gas is 3:7.
The particle diameter of outer wear layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
Embodiment 7：
A kind of integral sintered polycrystalline diamond button, the button are made up of outer wear layer 1 and internal anti-impacting layer 2, outside
Wearing layer 1 is made up of the raw material of following mass fraction：Diadust 86%, nickel powder 2%, silica flour 4%, cobalt powder 8%；Internal shock resistance
Layer 2 is made up of the raw material of following mass fraction：Diadust 60%, nickel powder 4%, silica flour 5%, cobalt powder 31%.
The granularity of the diadust of outer wear layer 1 is W20, and the granularity of the diadust of internal anti-impacting layer 2 is
W10。
The particle diameter of the nickel powder of outer wear layer 1 and internal anti-impacting layer 2 is 650 mesh.
The particle diameter of the silica flour of outer wear layer 1 and internal anti-impacting layer 2 is 900 mesh.
The particle diameter of the cobalt powder of outer wear layer 1 and internal anti-impacting layer 2 is 900 mesh.
The preparation method of integral sintered polycrystalline diamond button described above, is comprised the following steps that：
（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour,
Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；
（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon
Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；
（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；
（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；
（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature 750
℃；Impurity and oxygen in button of going out entity etc.；
（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure
8GPa, 1500 DEG C of sintering 4min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered polycrystalline diamond ball
Tooth.
Step（5）The volume ratio of middle hydrogen and argon gas is 3:7.
The particle diameter of outer wear layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
Embodiment 8：
A kind of integral sintered polycrystalline diamond button, the button are made up of outer wear layer 1 and internal anti-impacting layer 2, outside
Wearing layer 1 is made up of the raw material of following mass fraction：Diadust 95%, nickel powder 1%, silica flour 1%, cobalt powder 3%；Internal shock resistance
Layer 2 is made up of the raw material of following mass fraction：Diadust 68%, nickel powder 1%, silica flour 0%, cobalt powder 21%.
The granularity of the diadust of outer wear layer 1 is W10, and the granularity of the diadust of internal anti-impacting layer 2 is
W20。
The particle diameter of the nickel powder of outer wear layer 1 and internal anti-impacting layer 2 is 400 mesh.
The particle diameter of the silica flour of outer wear layer 1 and internal anti-impacting layer 2 is 540 mesh.
The particle diameter of the cobalt powder of outer wear layer 1 and internal anti-impacting layer 2 is 540 mesh.
The preparation method of integral sintered polycrystalline diamond button described above, is comprised the following steps that：
（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour,
Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；
（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon
Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；
（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；
（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；
（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature 690
℃；Impurity and oxygen in button of going out entity etc.；
（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure
6GPa, 1100 DEG C of sintering 5min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered polycrystalline diamond ball
Tooth.
Step（5）The volume ratio of middle hydrogen and argon gas is 3:7.
The particle diameter of outer wear layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
Embodiment 9：
A kind of integral sintered polycrystalline diamond button, the button are made up of outer wear layer 1 and internal anti-impacting layer 2, outside
Wearing layer 1 is made up of the raw material of following mass fraction：Diadust 70%, nickel powder 5%, silica flour 5%, cobalt powder 20%；Internal anti-impact
Layer 2 is hit to be made up of the raw material of following mass fraction：Diadust 65%, nickel powder 10%, silica flour 15%, cobalt powder 10%.
The granularity of the diadust of outer wear layer 1 is W10, and the granularity of the diadust of internal anti-impacting layer 2 is
W10。
The particle diameter of the nickel powder of outer wear layer 1 and internal anti-impacting layer 2 is 400 mesh.
The particle diameter of the silica flour of outer wear layer 1 and internal anti-impacting layer 2 is 540 mesh.
The particle diameter of the cobalt powder of outer wear layer 1 and internal anti-impacting layer 2 is 540 mesh.
The preparation method of integral sintered polycrystalline diamond button described above, is comprised the following steps that：
（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour,
Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；
（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon
Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；
（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；
（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；
（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature 690
℃；Impurity and oxygen in button of going out entity etc.；
（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure
7GPa, 1400 DEG C of sintering 6min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered polycrystalline diamond ball
Tooth.
Step（5）The volume ratio of middle hydrogen and argon gas is 3:7.
The particle diameter of outer wear layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
Comparative example 1 is existing commercially available hard alloy spherical-teeth, and comparative example 2 is existing commercially available hard alloy, glomerocryst Buddha's warrior attendant
Stone hard alloy composite ball tooth.
Embodiment 2-9 and comparative example 1-2 shock resistance number the results are shown in Table 1.
Shock resistance number measuring method：Weight 30kg, 1.5 meters of height, button is placed on backing plate at bottom, round end or conehead
Upward, weight is put down in 1.5 meters of eminences, makes its freely falling body, until pounding button, so repeatedly, test how many times can be with
Button is smashed, records the number pounded.
From table 1 it follows that the polycrystalline diamond button toughness of the present invention is higher than current sintered carbide ball
Tooth and diamond hard alloy composite ball tooth, therefore it is suitable for the worse situation of geological condition, service life is higher.
Above-described is only the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise of general idea of the present invention is not departed from, some changes and improvements can also be made, these should also be considered as the present invention's
Protection domain.
Claims (8)
- A kind of 1. integral sintered polycrystalline diamond button, it is characterised in that：The button is by outer wear layer（1）With internal anti-impact Hit layer（2）Composition, outer wear layer（1）Internally positioned anti-impacting layer（2）Outer layer, outer wear layer（1）By following quality point Several raw materials are made：Diadust 70-95%, nickel powder 1-5%, silica flour 1-15%, cobalt powder 3-20%；Internal anti-impacting layer（2）By The raw material of following mass fraction is made：Diadust 40-70%, nickel powder 1-10%, silica flour 5-15%, cobalt powder 10-40%.
- 2. integral sintered polycrystalline diamond button according to claim 1, it is characterised in that：The outer wear layer（1） With internal anti-impacting layer（2）The granularity of diadust be W40-W10.
- 3. integral sintered polycrystalline diamond button according to claim 1, it is characterised in that：The outer wear layer（1） With internal anti-impacting layer（2）Nickel powder particle diameter be respectively less than be equal to 300 mesh.
- 4. integral sintered polycrystalline diamond button according to claim 1, it is characterised in that：The outer wear layer（1） With internal anti-impacting layer（2）Silica flour particle diameter be respectively less than be equal to 400 mesh.
- 5. integral sintered polycrystalline diamond button according to claim 1, it is characterised in that：The outer wear layer（1） With internal anti-impacting layer（2）Cobalt powder particle diameter be respectively less than be equal to 400 mesh.
- 6. the preparation method of the integral sintered polycrystalline diamond button as described in claim 1-5 is any, it is characterised in that：Specifically Step is as follows：（1）Outer wear layer particle：First by nickel powder electroplate on diadust surface, then by the diadust of nickel plating, silica flour, Cobalt powder is well mixed, and is added the PVA aqueous solution that mass fraction is 1% and is soaked, is granulated, obtains outer wear layer particle；（2）Internal anti-impacting layer particle：First nickel powder is electroplated on diadust surface, then by the diadust of nickel plating, silicon Powder, cobalt powder are well mixed, and are added the PVA aqueous solution that mass fraction is 1% and are soaked, are granulated, obtain internal anti-impacting layer particle；（3）Outer wear layer particle packing is entered in mould, is compacted with pressure head；（4）Internal anti-impacting layer particle packing is entered in mould again, mould of being dismantled after being compacted with pressure head obtains button entity；（5）Above-mentioned button entity is put into vacuum drying oven, under hydrogen and argon gas mixed-gas environment, is incubated 1h, temperature is 650-750℃；（6）After the button entity and pyrophillite that are taken out from vacuum drying oven, steel ring assembling, it is put into cubic hinge press, in pressure 5-8GPa, 1100-1500 DEG C of sintering 3-6min of temperature, after taking-up after sandblasting and Excircle machining, forms integral sintered glomerocryst Diamond button.
- 7. the preparation method of integral sintered polycrystalline diamond button according to claim 6, it is characterised in that：The step （5）The volume ratio of middle hydrogen and argon gas is 3:7.
- 8. the preparation method of integral sintered polycrystalline diamond button according to claim 6, it is characterised in that：The outside The particle diameter of wearing layer particle and internal anti-impacting layer particle is 0.5-2.0mm.
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| CN113084172A (en) * | 2020-06-30 | 2021-07-09 | 郑州新亚复合超硬材料有限公司 | Method for preparing impregnated teeth by using ultrahigh temperature and high pressure and impregnated teeth thereof |
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