CN200975220Y - Diamond hard alloy complex sheet - Google Patents
Diamond hard alloy complex sheet Download PDFInfo
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- CN200975220Y CN200975220Y CN 200620121907 CN200620121907U CN200975220Y CN 200975220 Y CN200975220 Y CN 200975220Y CN 200620121907 CN200620121907 CN 200620121907 CN 200620121907 U CN200620121907 U CN 200620121907U CN 200975220 Y CN200975220 Y CN 200975220Y
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- groove
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- hard alloy
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Abstract
The utility model discloses a diamond/hard-alloy compound piece, comprising a diamond layer (1) and a hard-alloy substrate (2) sintered under extra-high pressure and temperature. The utility model is applicable to the drill teeth on the oil drill-bit, pertaining to super-hard material production field. A cylindrical convex boss (3) is provided on the binding face of the hard alloy substrate (2) and the diamond layer (1); the convex boss (3) is divided into a plurality of small square tubers by a perpendicularly cross groove (4); in addition, two groups of grooves symmetric and parallel with each other are evenly arranged on the rim of the hard-alloy substrate (2) to increase the contact area between the diamond layer and the substrate and to reduce the residual stress; the performance of the compound piece is further improved, especially, the grooves (5) largely improve the impact/heat-loss/wearing resistant capacity of the rim of the compound piece (namely, the efficient working area); and plow-harrow-like cutting effect is produced on the drilled stratum. Therefore, the utility model provides more suitable compound-piece drill teeth for medium-hard stratum and deep-well drill bits.
Description
Affiliated technical field
The utility model relates to a kind of diamond/hard alloy complex sheet, belongs to superhard material and makes the field.
Background technology
Diamond/hard alloy complex sheet is a kind of composite superhard material with good physical mechanical performances such as very high hardness, abrasion resistance, heat resistance and impact resistances, and sintering under the high pressure high temperature condition forms by diamond layer and cemented carbide substrate for it.Diamond/hard alloy complex sheet is commonly used for the drilling element on oil and natural gas drill bit, the coal field geology drill bit---bore tooth, bore tooth during the drill bit formation drilling and bear the powerful cutting resistance in stratum, frictional resistance, impact force and the high temperature that produces therefrom, so the quality of diamond/hard alloy complex sheet is the factor of the drilling depth, drilling efficiency, drilling cost and the scope of application most critical that influence drill bit.Diamond/the hard alloy complex sheet of in general passing by to make mostly is suitable for soft---in the drilling well of hard homogeneous formation, during its physical and mechanical properties also is difficult to satisfy as the ability of resistance to wearing, shock resistance, heat resistanceheat resistant are decreased firmly with the requirement of overlying strata, strong abrasive layer, heterogeneous body broken formation and the following strata drilling of three kms.The quality of diamond/hard alloy complex sheet depends primarily on factors such as the tungsten carbide size of purity, carbide alloy of bortz powder powder stock and cobalt content, high pressure high temperature sintering process parameter-pressure, temperature and time.Show through years of researches and practice: under the certain condition of above-mentioned factor, the shape of the diamond layer of composite sheet and cemented carbide substrate bonding surface is very big to its Effect on Performance, so utility model patent ZL942015363.3, ZL95209001.5, ZL96245178.9, ZL99216286.6, ZL00203712.2, and ZL200420059000.0 has proposed respectively to open straight trough on the cemented carbide substrate bonding surface, cannelure, the ring straight trough, radial radiation shape groove, crescent shaped groove, the straight trough that intersects vertically or the like scheme, the diamond layer and the cemented carbide substrate of composite sheet are meshing with each other, diamond layer gos deep in the groove of cemented carbide substrate, between forms the mixed transition layer with diamond and carbide alloy, this structure helps reducing that (diamond layer is 3.8 * 10 because of the two layers of material coefficient of thermal expansion for the simple plane contact of diamond and cemented carbide substrate
-6/ ℃, carbide alloy is 6.3 * 10
-6/ ℃) significant difference and the residual stress that causes, improve the impact resistance of composite sheet; Meanwhile because adamantine thermal conductivity (coefficient of thermal conductivity 5 cards/centimetre. second. degree) be best in all material, diamond layer embeds the heat that produces when cemented carbide substrate helps shedding composite sheet brill tooth drilling stratum rapidly, decreases ability thereby improve the composite sheet heat resistanceheat resistant; Said structure is also corresponding has in addition improved adamantine relative amount in the composite sheet volume, helps improving the antiwear property of composite sheet.Diamond/the hard alloy complex sheet of the designed manufacturing of above-mentioned in a word patent all in various degree improvement performance, improved the drilling well effect.Yet show according to test and effect, the flute profile of the cemented carbide substrate bonding surface that above-mentioned patent is designed is still not ideal, mainly show the edge-drilling stratum to composite sheet cutting edge research and improve inadequately, therefore also be necessary this is further improved.
Summary of the invention
The purpose of the utility model is by the diamond layer that changes diamond/hard alloy complex sheet and the shape of cemented carbide substrate bonding surface, further increase the contact area of diamond layer and substrate, reduce residual stress (internal force on the unit area), improve resistance to wear, shock resistance and heat resistanceheat resistant damage performance.Emphasis is that the effective operating position of change composite sheet is the bonding surface shape at diamond layer and cemented carbide substrate edge, make abrasion resistance, impact resistance and the thermal diffusivity at diamond layer edge better, produce a kind of cutting effect of similar plow harrow when making its drilling stratum, be beneficial to broken formation, improve drilling efficiency, for oil, natural gas exploration and exploitation provide be suitable in hard diamond/hard alloy complex sheet of using with overlying strata and deep-well Drilling bore bit.
Above-mentioned purpose realizes by following scheme: diamond/hard alloy complex sheet (Fig. 1) is to be formed by diamond layer (1) and cemented carbide substrate (2) sintering under the high pressure high temperature condition.One cylindrical boss (3) is arranged above the cemented carbide substrate (2), and boss (3) is divided into many square pimples by orthogonal groove (4); At the edge hemistich of substrate (2) groove (5) that distributing, groove (5) is identical with the direction of groove (4), sees Fig. 2.The boss (3) of substrate (2) is imbedded among the diamond layer (1) fully as shown in Figure 1 and Figure 2, groove (4) above the boss (3) and meshed with diamond layer by its square pimple of cutting apart formation is integral, increased the contact area of diamond layer and substrate greatly, effectively reduce residual stress, overall radiating effect when having improved composite sheet drilling stratum has improved the overall physical and mechanical properties of composite sheet; The groove (5) at substrate (2) edge further increases the diamond content at composite sheet edge, make its abrasion resistance, impact resistance and radiating effect better, and produce a kind of effect of similar plow harrow during the drilling stratum, help breaking through harder stratum, the performance of effective operating position, composite sheet edge and drilling well effect are had been further upgraded.
The diameter of described boss (3) is than the little 1-3mm of diameter of substrate (2), and the height of boss (3) is 0.5-2mm.
Described groove (4) is vertical mutually, its slot pitch 1-4mm, groove width 0.5-2mm, groove depth 0.5-2mm, the groove number can be decided according to the size of boss (3), certain when the diameter of boss (3), when the many more and degree of depth of groove (4) quantity was dark more, substrate (2) was also big more with diamond layer (1) area of contact.The section configuration of groove (4) has triangle, square, rectangle, trapezoidal, circular arc or their combination shape.
Described groove (5) is parallel to each other and is consistent with the direction of groove (4), slot pitch 1-4mm, and groove width 0.5-2mm, groove depth 0.5-2mm, the quantity of groove is decided according to the size of substrate (2), and general groove number surpasses 3.The section configuration of groove (5) is triangle, square, rectangle, trapezoidal, circular arc or their combination shape.
This diamond/hard alloy complex sheet compared with the prior art, boss (3) and groove (4) have been used for reference the design feature of the design people at the designed diamond/hard alloy complex sheet of ZL200420059000.0, different is: the groove (5) that 1, has increased by two groups of symmetries at the edge of substrate (2), groove (5) is parallel to each other and is consistent with groove (4) direction, and making the composite sheet edge is that the diamond layer of effective operating position combines with substrate more firmly, impact strength increases.2, from the circumference of composite sheet, can be clear that groove (5), composite sheet is welded to effective operating position that should make groove (5) be in the drilling stratum on the bit body, in the drilling process when diamond layer may wear to groove (5) and exposes, the diamond that sintering in the groove (5) carbide alloy relatively on every side, because hardness and wear resistance difference, make both degrees of wear inconsistent, the wearing and tearing of sintered diamond in the groove (5) relatively slowly and projection is comb shape, thereby the stratum is produced shear action like a kind of plow harrow, very favourable to breaking through harder stratum.3, the diamond of sinter setting has fabulous heat conductivility in the groove (5), the rapid heat that produces during the drilling stratum distributes like their astigmatism backings, the temperature of diamond edge cutting edge is reduced, avoiding fire damage to cause the diamond carbonization, is favourable to creeping into than hard formation and deep-well.4, the diamond of filling in the groove (5) increases the diamond content of workspace, composite sheet edge, has improved the wear-resistant ability of composite sheet.This diamond/hard alloy complex sheet improves shock resistance, heat resistanceheat resistant damage, the antiwear property of diamond layer (1) effective workspace, edge by the groove (5) at cemented carbide substrate (2) edge in a word, and the stratum produced the plow harrow effect, thereby in provide the composite sheet that is fit to more to bore tooth with overlying strata and deep-well Drilling bore bit firmly.
Description of drawings
Fig. 1 is the utility model diamond/hard alloy complex sheet schematic diagram.
Fig. 2 is the cemented carbide substrate schematic diagram of the utility model diamond/hard alloy complex sheet.
Among the figure: (1) diamond layer, (2) cemented carbide substrate, (3) boss, (4) groove, (5) groove.
Specific embodiments
Embodiment 1: a kind of diamond/hard alloy complex sheet (Fig. 1), sintering under the high pressure high temperature condition forms by diamond layer (1) and cemented carbide substrate (2).The cylindrical boss (3) of its substrate (2) is gone up uniform the groove that intersects vertically (4), the edge of substrate (2) uniform the groove (5) of two groups of symmetries, groove (5) is parallel to each other and consistent with groove (4) direction.The diameter of boss (3) highly is 1.2mm than the little 2.5mm of diameter of substrate (2), and the section configuration of groove (4) is trapezoidal, groove top width 1mm, and the wide 0.8mm of bottom land, groove depth 0.8mm, all there is the arc transition of R0.1mm at each Plane intersects place; Slot pitch is that the several diameters according to boss (3) of 2mm groove are decided; The flute profile size of groove (5) and groove number are identical with groove (4).
Embodiment 2: as the diamond/hard alloy complex sheet (Fig. 1) as described in the embodiment 1, the cylindrical boss (3) of substrate (2) is gone up uniform the groove that intersects vertically (4), the edge of substrate (2) uniform the groove (5) of two groups of symmetries, groove (5) is parallel to each other and consistent with groove (4) direction, boss (3) measure-alike, the quantity of groove (4) and groove (5) is identical.The section configuration of different is groove is a circular arc, arc radius R0.5mm, and groove top width 1mm, groove depth 0.8mm, all there is the arc transition of R0.3mm at arc surface and Plane intersects place.
Claims (5)
1, a kind of diamond/hard alloy complex sheet, system is formed by diamond layer (1) and cemented carbide substrate (2) sintering under the high pressure high temperature condition, its feature: on the bonding surface of substrate (2) and diamond layer (1) cylindrical boss (3) is arranged, the groove (4) that boss (3) is intersected vertically is divided into many square pimples; The edge of substrate (2) uniform the groove (5) of two groups of symmetries, groove (5) is parallel to each other and consistent with groove (4) direction.
2, diamond/hard alloy complex sheet according to claim 1 is characterized in that the diameter little 1-3mm of the diameter of boss (3) than substrate (2), highly is 0.5-2mm.
3, diamond/hard alloy complex sheet as claimed in claim 1 or 2 is characterized in that groove (4) is vertical mutually, its slot pitch 1-4mm, groove width 0.5-2mm, groove depth 0.5-2mm.
4, diamond/hard alloy complex sheet as claimed in claim 1 or 2, it is characterized in that groove (5) is distributed in the edge of substrate (2) symmetrically and is parallel to each other, groove (5) is consistent with the direction of groove (4), the slot pitch 1-4mm of groove (5), groove width 0.5-2mm, groove depth 0.5-2mm.
5, diamond/hard alloy complex sheet as claimed in claim 1 or 2, the cross sectional shape that it is characterized in that groove (4) and groove (5) can be respectively triangle, trapezoidal, square, rectangle or circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620121907 CN200975220Y (en) | 2006-06-23 | 2006-06-23 | Diamond hard alloy complex sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620121907 CN200975220Y (en) | 2006-06-23 | 2006-06-23 | Diamond hard alloy complex sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200975220Y true CN200975220Y (en) | 2007-11-14 |
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ID=38901506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620121907 Expired - Lifetime CN200975220Y (en) | 2006-06-23 | 2006-06-23 | Diamond hard alloy complex sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200975220Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289719A (en) * | 2014-10-23 | 2015-01-21 | 金华中烨超硬材料有限公司 | Polycrystalline diamond compact with embedded structure and manufacturing method thereof |
-
2006
- 2006-06-23 CN CN 200620121907 patent/CN200975220Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289719A (en) * | 2014-10-23 | 2015-01-21 | 金华中烨超硬材料有限公司 | Polycrystalline diamond compact with embedded structure and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071114 |
|
| EXPY | Termination of patent right or utility model |