CN103737008A - Novel production method for polycrystalline diamond compact (PDC) superhard material - Google Patents
Novel production method for polycrystalline diamond compact (PDC) superhard material Download PDFInfo
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- CN103737008A CN103737008A CN201410025089.7A CN201410025089A CN103737008A CN 103737008 A CN103737008 A CN 103737008A CN 201410025089 A CN201410025089 A CN 201410025089A CN 103737008 A CN103737008 A CN 103737008A
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Abstract
The invention discloses a novel production method for a polycrystalline diamond compact (PDC) superhard material. The production method includes the steps of a, production of a superhard-material reinforcing core, b, powder pressing, c, synthesis and d, aftertreatment. According to the production method, boron nitride, boron carbon-nitride, boron carbide and nano boron nitride polycrystalline materials are added to a PDC to serve as the reinforcing core; the production method is a novel method for synthesizing the composite superhard material at the high temperature and under the high pressure, and belongs to the field of superhard materials. By the production method for the PDC composite superhard material with the reinforcing core, the PDC composite superhard material can have tenacity of the polycrystalline materials and ultrahigh hardness of natural diamonds; boss-shaped plough-cut objects are formed during cutting, so that low cutting efficiency and high wear rate both caused by grinding are avoided, the performance of the PDC composite material is improved, and the application field of the superhard material is widened.
Description
Technical field
The present invention relates to a kind of superhard material field, particularly having had as boron nitride, boron carbonitrides, boron carbide and the nm-class boron nitride glomerocryst material preparation method as composite polycrystal-diamond (PDC) superhard wear-resistant composite material of strengthening core, is a kind of new method of HTHP sintering synthesizing superhard composite.
Background technology
Composite polycrystal-diamond (PDC) is to adhere to by polycrystalline diamond thin layer a kind of composite being bonded on cement carbide substrate.Because of the high tenacity of PDC with hard high-wearing feature and the carbide alloy of dimond synneusis, diamond rete remains good cutting edge simultaneously, so PDC is widely used in the fields such as precision optical machinery processing, Geological Engineering probing.
At present both at home and abroad polycrystalline diamond is that polycrystalline diamond layer is worn into and planely to reduce smear metal, sticked together phenomenon mostly, this has also caused PDC in use along with wear extent increases, polycrystalline diamond layer working face strengthens, cutting edge rust, and stock-removing efficiency reduces and wearing and tearing are accelerated.
Because PDC diamond layer can adopt catalyst when synthetic, the coefficient of thermal expansion of catalyst and diamond is not quite similar, and can accelerate diamond graphitization speed, this has just caused PDC diamond layer in use can produce the phenomenons such as oxidation, graphitization, thermal stress fragmentation.
PDC composite also there will be the phenomenon of hardness deficiency in use, and these have all limited the application of PDC.
Superhard material is as cubic boron nitride (c-BN), cube boron carbonitrides (c-BC
2n), boron carbide (B
4c) and nano twin crystal cubic boron nitride (nt-CBN) etc. be all the exsertile special material of this unicity of hardness, because of the higher use limitation of its fragility larger.
Along with modern mechanical processing and manufacturing and oil, geological prospecting industry increase the application of PDC, producing the PDC material that novel performance is more excellent is current extremely valuable research direction.
Summary of the invention
The technical issues that need to address of the present invention are just to overcome the defect of prior art, a kind of preparation method of New polycrystal diamond composite sheet superhard material is provided, it has overcome the deficiency of existing PDC composite, a kind of preparation method with the PDC composite superhard material that strengthens core, the material of preparation has the toughness of carbide alloy simultaneously, the ultrahigh hardness that has again the natural diamond that matches in excellence or beauty, and in working angles, form that boss-shaped plow is cut thing and low stock-removing efficiency and the high wear rate of avoiding grinding to cause, improve the performance of PDC composite, widen the application of superhard material.
For addressing the above problem, the present invention adopts following technical scheme:
The preparation method who the invention provides a kind of New polycrystal diamond composite sheet superhard material, comprises the following steps:
A, prepare superhard material and strengthen core: adopt laser cutting technique that enhancings core superhard material is cut into enhancing stem stem body;
B, pressed by powder: after polycrystalline diamond layer powder and hard alloy powder being filled in stainless steel mould, in mixed powder, imbed and strengthen stem stem body; Utilize hydraulic press that powder pressing is become to base, blank is put into graphite jig, vacuum reduction;
C, synthetic: graphite assembled block is put into pyrophyllite block and assemble, the pyrophyllite block that assembling is completed is put into press, at high pressure 40-70MPa, heating current 20-45A, the heating step synthetic PDC composite superhard material that contains wild phase under the synthesis condition of 30-35 MPa;
D, post processing: the PDC composite superhard material that contains wild phase obtaining is carried out to post processing.
In the present invention, described enhancing core superhard material is cubic boron nitride c-BN, cube boron carbonitrides c-BC
2n, boron carbide B
4one or more in C or nano twin crystal cubic boron nitride nt-CBN.
In the present invention, described enhancing stem stem body is imbedded and in mixed powder, will be made to strengthen stem stem body and have more than 70% surface area under powder parcel.
In the present invention, when hydraulic press becomes base by powder pressing, pressure is more than 30 MPa.
In the present invention, the time of described vacuum reduction is greater than 24 h.
In the present invention, described post processing is pickling after pickling or ball milling, after pickling, grinds again.
In the present invention, the cross section of described enhancing stem stem body is circular, square or triangle.
Beneficial effect of the present invention is: the present invention has overcome that stock-removing efficiency that cutting edge rounding that PDC material occurs in use for some time causes reduces and the rising of wear extent, the superhard material adding strengthens core and in use can produce boss-shaped thing and make PDC material remove and be cut material forms and become plow and be cut material forms from grinding, has improved stock-removing efficiency and has extended service life of PDC material.
Accompanying drawing explanation
Fig. 1 be adopted cross section be circular enhancing stem stem body PDC composite superhard material.
Fig. 2 be adopted cross section be square enhancing stem stem body PDC composite superhard material.
Fig. 3 be adopted cross section be leg-of-mutton enhancing stem stem body PDC composite superhard material.
the specific embodiment
The invention provides a kind of novel synthetic method that superhard material strengthens the PDC composite superhard material of core that has, below in conjunction with example, the present invention will be further described, but embodiments of the present invention are not limited to this.
embodiment 1
As shown in Figure 1:
1, utilize laser cutting machine that cubic boron nitride is cut into Φ 1 * 4mm small column.
2, after polycrystalline diamond layer powder and hard alloy powder being filled in stainless steel mould, imbed 1 and strengthen core, strengthen stem stem body completely under powder parcel.Utilize hydraulic press, under 30MPa, powder pressing is become to base.Blank is put into graphite jig, in vacuum reduction stove, reduce 48h.
3, the graphite assembled block of processing through vacuum reduction is put into pyrophyllite block and assemble, the pyrophyllite block assembling is put into hinge type cubic hinge press.Press pressure progressively rises to 65MPa and keeps stable, starts heating after press pressure rises to 30MPa, under heating current 35A, maintains 18min.
4, will carry out ball milling through HTHP synthetic sintered product mixings carbide alloy bead, pickling to occurring that the place of corner angle carries out polishing and obtain the composite superhard material containing cubic boron nitride enhancing core PDC after ball milling.
embodiment 2
As shown in Figure 2:
1, utilize laser cutting machine that a cube boron carbonitrides is cut into the little square column of 1 * 1 * 5mm.
2, after polycrystalline diamond layer powder and hard alloy powder being filled in stainless steel mould, imbed and strengthen stem stem body, strengthening stem stem body has more than 70% surface area under powder parcel.Utilize hydraulic press, under 35MPa, powder pressing is become to base.Blank is put into graphite jig, reductase 12 4h in vacuum reduction stove.
3, the graphite assembled block of processing through vacuum reduction is put into pyrophyllite block and assemble, the pyrophyllite block assembling is put into hinge type cubic hinge press.Press pressure progressively rises to 65MPa and keeps stable, starts heating after press pressure rises to 30MPa, under heating current 35A, maintains 15min.
4, will carry out ball milling through HTHP synthetic sintered product mixings carbide alloy bead, pickling to occurring that the place of corner angle carries out polishing and obtain containing a cube boron carbonitrides enhancing core PDC composite superhard material after ball milling.
embodiment 3
As shown in Figure 2:
1, utilize laser cutting machine that boron carbide is cut into the length of side for 1.2mm, height is the tri-prismoid of 4mm.
2, after polycrystalline diamond layer powder and hard alloy powder being filled in stainless steel mould, imbed and strengthen stem stem body, strengthening stem stem body has more than 70% surface area under powder parcel.Utilize hydraulic press, under 40MPa, powder pressing is become to base.Blank is put into graphite jig, in vacuum reduction stove, reduce 36h.
3, the graphite assembled block of processing through vacuum reduction is put into pyrophyllite block and assemble, the pyrophyllite block assembling is put into hinge type cubic hinge press.Press pressure progressively rises to 40MPa and keeps stable, starts heating after press pressure rises to 35MPa, under heating current 45A, maintains 15min.
4, will carry out ball milling through HTHP synthetic sintered product mixings carbide alloy bead, pickling to occurring that the place of corner angle carries out polishing and obtain the composite superhard material containing boron carbide enhancing core PDC after ball milling.
embodiment 4
As shown in Figure 3:
1, utilize laser cutting machine nano twin crystal cubic boron nitride to be cut into the cylinder of Φ 1.2 * 4mm.
2, after polycrystalline diamond layer powder and hard alloy powder being filled in stainless steel mould, imbed and strengthen stem stem body, strengthen stem stem body completely under powder parcel.Utilize hydraulic press, under 30MPa, powder pressing is become to base.Blank is put into graphite jig, reductase 12 4h in vacuum reduction stove.
3, the graphite assembled block of processing through vacuum reduction is put into pyrophyllite block and assemble, the pyrophyllite block assembling is put into hinge type cubic hinge press.Press pressure progressively rises to 55MPa and keeps stable, starts heating after press pressure rises to 33MPa, under heating current 42A, maintains 18min.
4, will carry out ball milling through HTHP synthetic sintered product mixings carbide alloy bead, pickling to occurring that the place of corner angle carries out polishing and obtain the composite superhard material containing nano twin crystal cubic boron nitride enhancing core PDC after ball milling.
embodiment 5
As shown in Figure 1:
1, utilize laser cutting machine that cubic boron nitride material is cut into Φ 1.5 * 4mm small column, nano twin crystal cubic boron nitride material is cut into Φ 1.5 * 4mm small column.
2, after polycrystalline diamond layer powder and hard alloy powder being filled in stainless steel mould, cubic boron nitride and the nano twin crystal cubic boron nitride of imbedding equal number strengthen stem stem body, and strengthening stem stem body has more than 70% surface area under powder parcel.Utilize hydraulic press, under 45MPa, powder pressing is become to base.Blank is put into graphite jig, in vacuum reduction stove, reduce 48h.
3, the graphite assembled block of processing through vacuum reduction is put into pyrophyllite block and assemble, the pyrophyllite block assembling is put into hinge type cubic hinge press.Press pressure progressively rises to 50MPa and keeps stable, starts heating after press pressure rises to 32MPa, under heating current 38A, maintains 17min.
4, will carry out ball milling through HTHP synthetic sintered product mixings carbide alloy bead, pickling to occurring that the place of corner angle carries out polishing and obtain containing cubic boron nitride and nano twin crystal cubic boron nitride enhancing core PDC composite superhard material after ball milling.
Finally it should be noted that: obviously, above-described embodiment is only for example of the present invention is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being amplified out thus or change are still among protection scope of the present invention.
Claims (7)
1. a preparation method for New polycrystal diamond composite sheet superhard material, is characterized in that, comprises the following steps:
A, prepare superhard material and strengthen core: adopt laser cutting technique that enhancings core superhard material is cut into enhancing stem stem body;
B, pressed by powder: after polycrystalline diamond layer powder and hard alloy powder being filled in stainless steel mould, in mixed powder, imbed and strengthen stem stem body; Utilize hydraulic press that powder pressing is become to base, blank is put into graphite jig, vacuum reduction;
C, synthetic: graphite assembled block is put into pyrophyllite block and assemble, the pyrophyllite block that assembling is completed is put into press, at high pressure 40-65 MPa, heating current 35-45 A, the heating step synthetic PDC composite superhard material that contains wild phase under the synthesis condition of 30-35 MPa;
D, post processing: the PDC composite superhard material that contains wild phase obtaining is carried out to post processing.
2. the preparation method of New polycrystal diamond composite sheet superhard material as claimed in claim 1, is characterized in that, described enhancing core superhard material is cubic boron nitride c-BN, cube boron carbonitrides c-BC
2n, boron carbide B
4one or more in C or nano twin crystal cubic boron nitride nt-CBN.
3. the preparation method of New polycrystal diamond composite sheet superhard material as claimed in claim 1, is characterized in that, described enhancing stem stem body is imbedded and in mixed powder, will be made to strengthen stem stem body and have more than 70% surface area under powder parcel.
4. the preparation method of New polycrystal diamond composite sheet superhard material as claimed in claim 1, is characterized in that, when hydraulic press becomes base by powder pressing, pressure is more than 30 MPa.
5. the preparation method of New polycrystal diamond composite sheet superhard material as claimed in claim 1, is characterized in that, the time of described vacuum reduction is greater than 24 h.
6. the preparation method of New polycrystal diamond composite sheet superhard material as claimed in claim 1, is characterized in that, described post processing is pickling after pickling or ball milling, after pickling, grinds again.
7. the preparation method of the New polycrystal diamond composite sheet superhard material as described in claim 1-6 arbitrary, is characterized in that, the cross section of described enhancing stem stem body is circular, square or triangle.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399990A (en) * | 2014-10-23 | 2015-03-11 | 金华中烨超硬材料有限公司 | Hard alloy-polycrystalline diamond compact with decorative patterns on surface and preparation method thereof |
| CN110436928A (en) * | 2019-08-26 | 2019-11-12 | 燕山大学 | High-performance nano twin boron carbide ceramics block materials and preparation method thereof |
| CN111592360A (en) * | 2020-06-09 | 2020-08-28 | 欧阳晓平 | Polycrystal B4C-diamond double-layer composite material and preparation method thereof |
| CN114161327A (en) * | 2020-09-10 | 2022-03-11 | 江信有限公司 | Diamond particles and method for producing same |
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| JPH0920591A (en) * | 1995-05-01 | 1997-01-21 | Kobe Steel Ltd | Formation of diamond film |
| US20020073918A1 (en) * | 2000-12-15 | 2002-06-20 | Reade Ronald P. | Particle beam biaxial orientation of a substrate for epitaxial crystal growth |
| CN102700191A (en) * | 2012-06-14 | 2012-10-03 | 北京科技大学 | Method for manufacturing polycrystalline diamond compact enhanced by chemical vapor deposition (CVD) diamond |
| CN102861917A (en) * | 2012-10-11 | 2013-01-09 | 北京科技大学 | Preparation method of polycrystalline diamond compact covered by strong-combination chemical vapor deposition (CVD) diamond layer |
| CN103158287A (en) * | 2011-12-09 | 2013-06-19 | 郑州博特硬质材料有限公司 | Glomerocryst cubic boron nitride composite sheet and preparation method for same |
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2014
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Patent Citations (5)
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| JPH0920591A (en) * | 1995-05-01 | 1997-01-21 | Kobe Steel Ltd | Formation of diamond film |
| US20020073918A1 (en) * | 2000-12-15 | 2002-06-20 | Reade Ronald P. | Particle beam biaxial orientation of a substrate for epitaxial crystal growth |
| CN103158287A (en) * | 2011-12-09 | 2013-06-19 | 郑州博特硬质材料有限公司 | Glomerocryst cubic boron nitride composite sheet and preparation method for same |
| CN102700191A (en) * | 2012-06-14 | 2012-10-03 | 北京科技大学 | Method for manufacturing polycrystalline diamond compact enhanced by chemical vapor deposition (CVD) diamond |
| CN102861917A (en) * | 2012-10-11 | 2013-01-09 | 北京科技大学 | Preparation method of polycrystalline diamond compact covered by strong-combination chemical vapor deposition (CVD) diamond layer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399990A (en) * | 2014-10-23 | 2015-03-11 | 金华中烨超硬材料有限公司 | Hard alloy-polycrystalline diamond compact with decorative patterns on surface and preparation method thereof |
| CN110436928A (en) * | 2019-08-26 | 2019-11-12 | 燕山大学 | High-performance nano twin boron carbide ceramics block materials and preparation method thereof |
| CN110436928B (en) * | 2019-08-26 | 2021-11-23 | 燕山大学 | High-performance nano twin crystal boron carbide ceramic block material and preparation method thereof |
| CN111592360A (en) * | 2020-06-09 | 2020-08-28 | 欧阳晓平 | Polycrystal B4C-diamond double-layer composite material and preparation method thereof |
| CN114161327A (en) * | 2020-09-10 | 2022-03-11 | 江信有限公司 | Diamond particles and method for producing same |
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| CN103737008B (en) | 2016-06-08 |
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