CN1154267A - Hard alloy top hammer for high pressure synthesizing diamond - Google Patents
Hard alloy top hammer for high pressure synthesizing diamond Download PDFInfo
- Publication number
- CN1154267A CN1154267A CN 96102639 CN96102639A CN1154267A CN 1154267 A CN1154267 A CN 1154267A CN 96102639 CN96102639 CN 96102639 CN 96102639 A CN96102639 A CN 96102639A CN 1154267 A CN1154267 A CN 1154267A
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- top hammer
- amount
- hammer
- tac
- anvil
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- 239000010432 diamond Substances 0.000 title claims abstract description 9
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 title description 20
- 239000000956 alloy Substances 0.000 title description 20
- 230000002194 synthesizing effect Effects 0.000 title description 2
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000000465 moulding Methods 0.000 claims abstract 3
- 239000002245 particle Substances 0.000 claims abstract 3
- 229910052804 chromium Inorganic materials 0.000 claims description 11
- 229910017052 cobalt Inorganic materials 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 8
- 229910052715 tantalum Inorganic materials 0.000 claims description 7
- 238000000748 compression moulding Methods 0.000 claims description 6
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910000531 Co alloy Inorganic materials 0.000 claims description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910003468 tantalcarbide Inorganic materials 0.000 claims 9
- 239000004568 cement Substances 0.000 claims 3
- 230000007423 decrease Effects 0.000 claims 1
- 150000001247 metal acetylides Chemical class 0.000 claims 1
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 claims 1
- 238000003825 pressing Methods 0.000 claims 1
- 230000035939 shock Effects 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 description 14
- 239000011651 chromium Substances 0.000 description 12
- 238000009826 distribution Methods 0.000 description 6
- 229910009043 WC-Co Inorganic materials 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011068 loading method Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000750 progressive effect Effects 0.000 description 3
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 229910003470 tongbaite Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- JPNWDVUTVSTKMV-UHFFFAOYSA-N cobalt tungsten Chemical compound [Co].[W] JPNWDVUTVSTKMV-UHFFFAOYSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- -1 tungsten carbides Chemical class 0.000 description 1
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Abstract
本发明提供一种高压合成金刚石用的硬质合金顶锤，从其顶部到底部，从中心到周边，均具有从低到高的渐进的胶结相梯度，沿高度方向和横截面方向还具有与上述胶结相结构相匹配的材料粒度梯度。这种顶锤的制造方法是按选定的成分配比和粒度组成混合料，用特定的装料工具在所选定的成型模腔内的不同部位装入不同配比混合料，压制成型、干燥、烧结成顶锤。这种顶锤耐热冲击、热疲劳性能、抗冲击性能、抗脆裂性能均好于常规顶锤。
The invention provides a cemented carbide anvil for high-pressure synthetic diamond, which has a gradual cementation phase gradient from low to high from the top to the bottom, from the center to the periphery, and has the same gradient along the height direction and cross-sectional direction. The above cemented phase structure matches the grain size gradient of the material. The manufacturing method of this top hammer is to form a mixture according to the selected composition ratio and particle size, and use a specific charging tool to fill different proportions of the mixture in different parts of the selected molding cavity, press molding, Dry and sinter to form an anvil. This top hammer has better thermal shock resistance, thermal fatigue performance, impact resistance and brittle fracture resistance than conventional top hammers.
Description
The present invention relates to the carbide alloy field, the hard alloy top hammer that a kind of especially novel high-pressure synthetic diamond is used.
As everyone knows, hard alloy top hammer is the critical piece of high temperature high pressure device during diamond synthesis is produced, this top hammer is worked in abominable high temperature and high pressure environment, and be in loading all the time, under the effect of the mechanical stress of intensification, pressurize, cooling, this alternation of unloading and thermal shock.Photoelastic analysis, stress electrical measurement analysis, FInite Element computational analysis to top hammer duty have shown that the top hammer bears complicated stress state.The stress of this complexity that design of the material of homogeneous and the top hammer material design generally adopted of institute at present and the incompatible top of product are hammered into shape.With single cylinder work tonnage is that 400 tons top hammer is an example, and by to photoelastic analysis, electrical measurement stress analysis and FInite Element result of calculation analysis-by-synthesis, maximum compression stress ot is born at the center by peen portion in top
Press max=5590MPa maximum shear stress acts on central shaft apart from end face 10.6mm place, σ
Cut max=1770MPa, maximum tension stress act on line of symmetry below, 46 ° of inclined-planes, σ
Draw max=363MPa.Upper area apart from top peen face height overall bears compression, shear stress is higher, line of symmetry below, 46 ° of inclined-planes of hammer, top, and top hammer periphery, highly locates to bear higher tension at the bottom of the hammer centre-to-centre spacing of top.
When with 20 minutes synthesizing high strength diamonds, energising moment and preceding 5 minutes temperature sharply raises.The last workbench surface temperature of top hammer reaches 600 ℃, and the edge is 350 ℃, reaches 200 ℃ apart from upper surface 12mm place temperature, has very big temperature gradient field along central axis direction, and hammer top, top approximately
The height part is born very big thermal shock.
For adapting to the stress and the hot state of this complexity of hammering into shape on the top, the top hammer should have specific gradient-structure, and this specific gradient-structure is that osmosis technology can't realize.
The purpose of this invention is to provide and a kind ofly have, have the hard alloy top hammer that from low to high progressive glued phase structure becomes other phase gradient from hammer center, top to all edges cross-sectional direction along the progressive highly from low to high glued phase gradient of top hammer.
Another object of the present invention provides the hard alloy top hammer that a kind of its material of zones of different on different cross section has different physics, mechanics, thermal property.Heat proof material is adopted at the top, makes it to have outstanding high-temperature behavior and outstanding heat-resisting splitting and antioxygenic property.
A further object of the present invention provides a kind of process that is used to make above-mentioned hard alloy top hammer, promptly according to design, and pack into the compound of different proportionings of the different parts in mold cavity, compression moulding then.
At last of the present invention but be not the process that least important purpose provides some manufacturing hard alloy top hammers of being made up of the proportioning and the loading method of different compounds.
The hard alloy top hammer of using according to high pressure diamond of the present invention is by carbide alloy (WC, TaC, Cr
3C
2, TaC/NbC etc.) form with glued element mutually (Co, Ni, Cr etc.), promptly work chain-wales to hammer bottom, top from top peen portion, also promptly have the progressive glued phase gradient structure of content from low to high along the short transverse of top hammer; To top hammer periphery, promptly radially, has the glued phase gradient structure of content from low to high from hammer center, top along cross section; Radially also have tungsten carbide size gradient and other carbide phase gradient that is complementary with above-mentioned glued phase structure along short transverse with along cross section.
According to hard alloy top hammer of the present invention, owing to have said structure, make the top hammer have different physical mechanicses and thermal property with zones of different on the cross section through the vertical cross-section of central axis.For example, the centre of top peen portion and top to bottom height, these regional materials have high resistance to compression, shear strength and outstanding heat-resistant cracking, the material of top hammer periphery and bottom section has advantages of higher tensile strength and fracture toughness, and the top hammer life-span is brought up to more than 4000 times for 2500 times from the deficiency of common top hammer.The energising hammer is brought up to more than 2000 times for 1000 times by less than.
According to the method that the top of manufacturing high pressure diamond provided by the present invention is hammered into shape, be the compound that is incorporated with different proportionings and granularmetric composition by selected composition proportion and granularmetric composition compound with the different parts of specific stocking tool in selected mould chamber.Compression moulding sinters into after the drying and has the top hammer that specific gluing reaches carbide alloy phase gradient structure mutually.The special tool(s) that is adopted comprises stainless steel sheet| cylinder, charging bag etc.Sintering temperature is 1400～1450 ℃, and the time is 60～120 minutes.
Below in conjunction with accompanying drawing the present invention is illustrated.
Fig. 1 is cubic apparatus hammer vertical section Co element distribution schematic diagram.
Fig. 2 is along Figure 1A-A cross section Co element distribution schematic diagram.
Fig. 3 is along Figure 1B-B cross section Co element distribution schematic diagram.
Fig. 4 is the example of cubic apparatus hammer vertical section measured hardness HRA.
Fig. 5 is the example of two top hammer vertical section measured hardness HRA.
Fig. 6 shows the relation of top hammer WC-Co alloy rigidity HRA and KIC value.
The relation that Fig. 7 goes into for the hardness HRA and the Co phase average free path of WC-Co alloy top hammer.
Fig. 8 is Co, Ta (or Nb, Cr) the central cross-section distribution schematic diagram with heterogeneity, phase structure gradient top hammer.
Fig. 9 is the Co distribution map along Fig. 8 A-A line.
Figure 10 is the distribution map along the Ta of Fig. 8 A-A line (or Cr).
Figure 11 is the front view of cubic apparatus hammer.
Figure 12 is the vertical view of Fig. 9.
Figure 13 is the top pallet piece front view of cubic apparatus hammer DC625.
Figure 14 is the vertical view of Figure 13.
As shown in Figure 1, it is that top hammer work facet is to the top hammer bottom that the cementing phase cobalt Co element of cubic apparatus hammer vertical section distributes from the top hammer top, namely the short transverse along top hammer has the from low to high cementing phase gradient structure of content, in the top hammer that is comprised of WC and Co element, the Co element can be regarded as the Binder metal element.
As shown in Figure 2, along cubic apparatus hammer vertical section center line A-A, namely the Co constituent content along short transverse is increased to 7～9% of bottom gradually from 5～7.5% of top.
As shown in Figure 3, along the cross section of cubic apparatus hammer radially the Co constituent content be increased to gradually 7～9% of periphery from 5～7.5% of center.
As shown in Figure 4, have the top hammer of material structure shown in Figure 1, the measured value of its vertical section hardness demonstrates from the top to the bottom, the situation that reduces gradually from the center to the periphery. This hardness distributes and adapts to the actual loading requirement of top hammer.
Fig. 5 shows the trend same with Fig. 4, but this example is taken from two top hammers. No matter namely be the top hammer of what form, all have similar cementing phase structure and hardness and distribute.
As shown in Figure 6, the hardness of WC-Co (tungsten-cobalt carbide) alloy top hammer reduces along with the increase of KIC (impact flexibility) value, and this relation provides foundation for people design top hammer hardness.
As shown in Figure 7, the increase that enters along with the free path as cementing Elements C o of the hardness HRA of WC-Co alloy top hammer and reducing. Improve the hardness HRA of top hammer, the free path that just should reduce the Co element enters.
As shown in Figure 8, at WC-TaC (or TaC/NaC, Cr3C
2In the)-Co alloy top hammer, as the Co of cementing phase element, present equally from the top to the bottom, therefrom the trend that increases gradually of mind-set periphery.
As shown in Figure 9, two top hammers are hammered the center line A-A of central vertical section into shape along the top, and promptly the Co along short transverse is increased to 7～9% of bottom surface gradually from 5～7% of top.
As shown in figure 10, Ta, Ta/Nb, or the content of Cr from 0.8～1.5%Ta, the Ta/Nb at top or≤0.5%Cr highly reduces to zero to .
Can also adopt Co-Ni-Cr is glued phase material, and its proportioning is Co=4～9%, Ni=0～4%, and Cr=0～0.5%, TaC (or TaC/NbC)=0～2%, all the other are WC.
As Figure 11～shown in Figure 12, hexahedron of the present invention top hammer has several critical sizes: the top peen face chain-wales length of side a that promptly works, top hammer height H, the inclination alpha on inclined-plane, frustum of a cone base diameter Φ, bottom cylinder gradient β promptly push up hammer lower side and vertical plane angle.
It is available that following table has provided several size embodiment:
Shown in Figure 13,14, the cushion block key dimension of hard alloy top hammer has end body diameter Φ
1, tip circle column diameter Φ
2, cushion block overall height H
1, the height H of removing the tip circle post
2The cushion block of embodiment DC625 is of a size of: end body diameter Φ
1=104 ± 0.5mm
| Numbering | Size, mm | ????α | ???β | ||
| ????Φ | ????a×a | ????H | |||
| ??DC614 | ?????+1.0 70.6 ??????0 | ????14×14±0.4 | ?????+1.0 51.5 ??????0 | ??46° | |
| ??DC622 | ?????+1.0 70.6 ??????0 | ????22×22±0.4 | ?????+1.0 47.5 ??????0 | ??46° | |
| ??DC625 | ?????+1.0 70.6 ??????0 | ????25.5×25.5±0.4 | ?????+1.0 47.5 ??????0 | ??46° | 1°30′ |
| DC628B | ?????+1.5 82.5 ??????0 | ????28×28±0.4 | ?????+1.0 57 ?????-0.5 | ??46° | |
| ??DC220 | ?????+1.0 71 ??????0 | ????????0 ????25 ???????-0.5 | ?????+1.0 58 ?????-0.5 | ??46° | |
| ??DC225 | ?????+1.0 79 ??????0 | ????????0 ????25 ???????-0.7 | ?????+1.0 59 ?????-0.5 | ??46° | |
Tip circle column diameter Φ
2=68 ± 0.5mm
Cushion block overall height H
1=44mm
Overall height deducts tip circle post height H
2=36mm
Embodiment
When example 1. compound compositions are tungsten carbide (WC) and metallic cobalt (Co), or when tungsten carbide (WC), ramet (TaC) and Co, compound with WC-75%Co or WC-1%TaC-7.5%Co is the A amount, the mesotropic thin stainless steel sheet| cylinder of hammer former is pushed up in special the placing of packing into, pack into the compound B amount of WC-8.5%Co of the periphery of cylinder and mold cavity top, take out cylinder, mixing charge level in the die cavity is scraped managed into convex surface, compression moulding.Poor 〉=the 20mm of stainless steel sheet| outside diameter of cylinder and mold cavity internal diameter, in the blank after the necessary assurance of the A amount compression moulding, count from top hammer work chain-wales, the WC-7.5%Co material is occupied the degree of depth of above (preferably ), the B amount must guarantee that in finished product top hammer circumferential periphery and bottom, the WC-8.5%Co material has the above thickness of 10mm.A amount: B amount=1: 1.5～3.
Prepared hard alloy top hammer has desired alloy gradient-structure tissue.
Example 2. compound compositions are tungsten carbide (WC), chromium carbide (Cr
3C
2), nickel and Co are with WC-0.5%Cr
3C
2-2.2%Ni-5.3%Co compound is the A amount, and all the other methods of operating and batching distribute with example 1.
Example 3. compound composition tungsten carbides (WC), chromium carbide (Cr
3C
2) and cobalt (Co), with compound WC-0.5%Cr
3C
2-6.0%Co gets the C amount, hammer work facet place is promptly pushed up in its die cavity bottom of packing into, the WC-7.0%Co compound is got the D amount, be installed on the C amount with charging, select for use the WC-8%Co compound to get the E amount, be installed on the D amount with charging, upper surface compound in the die cavity scraped manage into convex surface, compression moulding, with blank dry or take off plasticizer after, 1400～1450 ℃ of sintering temperatures 60～120 minutes.C amount: D amount: E amount=0.8～1: 0.8～1: 0.8～1.
According to proportioning of the present invention, shape, the prepared hard alloy top hammer of manufacture craft, thermal shock resistance and thermal fatigue resistance all are better than common top hammer.D for example
6Use DC625 of the present invention top to hammer into shape on 4800 tons of forcing presses of type hinge type, the energising equal life-span of hammer out surpasses 2000 times, and less than 1000 times are hammered on conventional top into shape.
Hard hammer shock resistance of the present invention, resistance to brittle fracture can all be better than common top hammer.Average life span is more than 4000 times.
According to top of the present invention hammer,, under the condition that does not exceed technology contents of the present invention, all belong to protection scope of the present invention no matter its charge ratio, alloying component, or appearance and size, loading method and manufacturing process can also have various variations.
Claims (13)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96102639 CN1154267A (en) | 1996-01-10 | 1996-01-10 | Hard alloy top hammer for high pressure synthesizing diamond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96102639 CN1154267A (en) | 1996-01-10 | 1996-01-10 | Hard alloy top hammer for high pressure synthesizing diamond |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1154267A true CN1154267A (en) | 1997-07-16 |
Family
ID=5117656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96102639 Pending CN1154267A (en) | 1996-01-10 | 1996-01-10 | Hard alloy top hammer for high pressure synthesizing diamond |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1154267A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463444B (en) * | 2000-12-19 | 2010-12-15 | 本田技研工业株式会社 | Molding tool formed of gradient composite material and method of producing the same |
| CN107635700A (en) * | 2015-05-21 | 2018-01-26 | 山特维克知识产权股份有限公司 | Produce for cutting, the method for the cutter of Drilling or breaking solid material and such cutter |
-
1996
- 1996-01-10 CN CN 96102639 patent/CN1154267A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463444B (en) * | 2000-12-19 | 2010-12-15 | 本田技研工业株式会社 | Molding tool formed of gradient composite material and method of producing the same |
| CN107635700A (en) * | 2015-05-21 | 2018-01-26 | 山特维克知识产权股份有限公司 | Produce for cutting, the method for the cutter of Drilling or breaking solid material and such cutter |
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