CN220050043U - Cemented carbide forming matrix and superhard composite sheet - Google Patents
Cemented carbide forming matrix and superhard composite sheet Download PDFInfo
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- CN220050043U CN220050043U CN202321036252.0U CN202321036252U CN220050043U CN 220050043 U CN220050043 U CN 220050043U CN 202321036252 U CN202321036252 U CN 202321036252U CN 220050043 U CN220050043 U CN 220050043U
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- cemented carbide
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- 239000011159 matrix material Substances 0.000 title claims abstract description 15
- 239000002131 composite material Substances 0.000 title abstract description 22
- 239000000956 alloy Substances 0.000 claims abstract description 98
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 98
- 239000000463 material Substances 0.000 claims abstract description 43
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims description 19
- 238000005245 sintering Methods 0.000 claims description 6
- 239000007767 bonding agent Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 38
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007648 laser printing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Abstract
The utility model provides a hard alloy forming matrix and a superhard composite sheet, which comprises a cylindrical hard alloy outer ring layer and a hard alloy hollowed-out cylinder, wherein the hard alloy hollowed-out cylinder is placed in a cavity of the cylindrical hard alloy outer ring layer, a plurality of radial holes and axial holes are formed in the hard alloy hollowed-out cylinder, and forming cavities for filling superhard micro powder and binding agent are formed in the radial holes, the axial holes and between the hard alloy hollowed-out cylinder and the cylindrical hard alloy outer ring layer. The cemented carbide forming matrix increases the contact area between the superhard material and the cemented carbide, so that the superhard material can be regularly filled and wrapped in the interior and the exterior of the cemented carbide hollowed-out cylinder, thereby improving the mechanical property of the prepared superhard composite sheet and improving the impact resistance and toughness of the superhard composite sheet.
Description
Technical Field
The utility model relates to the field of superhard materials, in particular to a hard alloy forming matrix and a superhard composite sheet.
Background
The superhard composite sheet is obtained by sintering the superhard micro powder, the bonding agent and the hard alloy substrate at high temperature and high pressure. Besides the performances of the ultra-hard micro powder and the binding agent in the formula used in the composite sheet, the assembly structure of the ultra-hard micro powder, the binding agent and the hard alloy substrate also can influence the performances of the ultra-hard composite sheet. At present, the composite sheet applied to geological exploration generally has the defects of short service life and poor wear resistance.
The utility model patent with the publication number of CN213997835U specifically discloses a square embedded blade which comprises a square hard alloy substrate and a square superhard material wrapping layer sintered outside the hard alloy substrate, wherein the hard alloy substrate is provided with a central assembly hole and a plurality of crossed grooves; the superhard material coating layer is completely coated or semi-coated on the outer surface of the hard alloy matrix to form a square embedded blade or an integral square embedded blade with a substrate. The square embedded blade improves the binding force of the superhard material and the hard alloy matrix in a wrapping or semi-wrapping mode, but the hard alloy matrix is a single whole, and the defects of small contact area of the superhard material and the hard alloy matrix, poor impact resistance, toughness and wear resistance and short service life still exist.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of Invention
In order to increase the contact area between the superhard material and the hard alloy matrix and improve the impact resistance, toughness and wear resistance of the composite sheet, the utility model adopts the following technical scheme: the hard alloy forming matrix comprises a cylindrical hard alloy outer ring layer and a hard alloy hollowed-out cylinder, wherein the hard alloy hollowed-out cylinder is placed in a cavity of the cylindrical hard alloy outer ring layer, a plurality of radial holes and axial holes are arranged on the hard alloy hollowed-out cylinder,
and forming cavities for filling ultra-hard micro powder and binding agents in the radial holes, in the axial holes and between the hard alloy hollowed-out cylinder and the cylindrical hard alloy outer ring layer.
Based on the above, in order to form the ultrahard material layer at the top of the hard alloy hollowed column, the top edge of the cylindrical hard alloy outer ring layer is higher than the top of the hard alloy hollowed column.
Based on the above, in order to increase the binding force, the carbide hollow cylinder top surface is provided with a plurality of top grooves, the top grooves are formed by the radial hole upper portion that is located on the carbide hollow cylinder top surface is uncovered.
Based on the above, in order to increase the holding force, the outer edge of the top surface of the hard alloy hollowed-out cylinder is provided with a plurality of triangular protrusions, and the triangular protrusions are located between two adjacent top grooves.
Based on the above, a plurality of radial holes are distributed in multiple layers along the height direction of the hard alloy hollow column.
Based on the above, in order to obtain different mechanical properties at different positions, the opening sizes of the radial holes at the outer side wall of the hard alloy hollow cylinder are sequentially reduced from the upper layer to the lower layer.
Based on the above, in order to obtain different mechanical properties at different positions, the diameters of the radial holes gradually decrease from the outer side wall of the cemented carbide hollowed-out cylinder to the axial direction of the cemented carbide hollowed-out cylinder, so as to form a plurality of radial holes with gradually decreased diameters.
Based on the above, in order to obtain different mechanical properties at different positions, a plurality of axial holes are formed on the cemented carbide hollowed-out cylinder in a plurality of concentric rings, and the aperture of the axial holes on the outer concentric ring is larger than that of the axial holes on the inner concentric ring.
The embodiment also provides a superhard composite sheet, which comprises a filled superhard material column and a superhard material layer fully or semi-wrapped outside the filled superhard material column; the superhard material filled cylinder is formed by filling a plurality of axial holes and a plurality of radial holes in the hard alloy hollowed cylinder with superhard micro powder and a bonding agent and then performing pressure sintering.
Based on the above, the superhard composite sheet further comprises a cylindrical hard alloy outer ring layer, and the cylindrical hard alloy outer ring layer is semi-wrapped outside the filled superhard material cylinder.
Compared with the prior art, the utility model has substantial characteristics and progress, in particular to the hard alloy forming matrix and the hard alloy composite sheet, and the hard alloy forming matrix and the hard alloy composite sheet are characterized in that the hard alloy cylinder is designed into the hollow structure to form the hard alloy hollow cylinder, so that when a blank is pressed, the hard alloy micro powder can be filled in holes of the hard alloy hollow cylinder, and the super hard alloy mesh structure is formed after high-temperature and high-pressure sintering, so that the contact area between a super hard material and the hard alloy is increased, the super hard material can be regularly filled and wrapped in the inner side and the outer side of the hard alloy hollow cylinder, the mechanical property of the manufactured super hard alloy composite sheet is improved, and the impact resistance and the toughness of the manufactured super hard alloy composite sheet are improved. Meanwhile, the cylindrical hard alloy outer ring layer is arranged on the outer side of the hard alloy hollowed-out cylinder, and the top of the cylindrical hard alloy outer ring layer is higher than the top of the hard alloy hollowed-out cylinder, so that an ultra-hard material layer can be formed on the top and the outer side of the hard alloy hollowed-out cylinder through high temperature and high pressure, and the wear resistance and the service life of the ultra-hard material layer are improved.
Furthermore, the hard alloy hollowed-out cylinder is arranged in the middle of the cylindrical hard alloy outer ring layer, so that when the cylindrical hard alloy outer ring layer cavity is filled with the ultra-hard micro powder, various structures can be formed, a fully-wrapped or semi-wrapped structure is formed, and the structure type of the ultra-hard composite sheet is increased.
Further, a plurality of triangular protrusions and a plurality of top grooves are formed in the top of the hard alloy hollowed-out cylinder, so that the contact area between the top of the hard alloy hollowed-out cylinder and the super-hard material layer can be increased, and the binding force of the two materials is increased.
Furthermore, the sizes of the openings of the holes in the hard alloy hollowed-out column body are designed to be different according to the specific positions, so that the manufactured superhard composite sheet has different toughness at different positions, and the material cost is saved on the premise of meeting the toughness at different positions.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a cemented carbide forming substrate provided by the utility model.
Fig. 2 is a schematic diagram of a partial structure of a cemented carbide forming substrate according to the present utility model.
Fig. 3 is a schematic cross-sectional view of a superhard compact according to embodiment 5 of the present utility model.
Fig. 4 is a schematic cross-sectional view of a superhard compact according to embodiment 6 of the present utility model.
Fig. 5 is a schematic cross-sectional view of a superhard compact according to embodiment 7 of the present utility model.
In the figure: 1. a cylindrical hard alloy outer ring layer; 2. hard alloy hollowed-out column; 3. a radial hole; 4. an axial bore; 5. triangular protrusions; 6. a top groove; 7. a layer of ultra-hard material; 8. filling the superhard material column.
Detailed Description
The technical scheme of the utility model is further described in detail through the following specific embodiments.
Example 1
The embodiment provides a hard alloy forming matrix, which comprises a cylindrical hard alloy outer ring layer 1 and a hard alloy hollowed-out column body 2 as shown in fig. 1 and 2.
The hard alloy hollowed-out cylinder 2 is placed in the cavity of the cylindrical hard alloy outer ring layer 1, and a plurality of radial holes 3 and axial holes 4 are formed in the hard alloy hollowed-out cylinder 2.
And forming cavities for filling ultra-hard micro powder and binding agent are formed in the radial holes 3, in the axial holes 4 and between the hard alloy hollowed-out cylinder 2 and the cylindrical hard alloy outer ring layer 1.
Specifically, in order to increase the binding force, the top surface of the cemented carbide hollow cylinder 2 is provided with a plurality of top grooves 6. The top groove 6 is formed by opening the upper part of the radial hole 3 positioned on the top surface of the hard alloy hollowed-out cylinder 2.
In order to increase the holding force, a plurality of triangular protrusions 5 are arranged at the outer edge of the top surface of the hard alloy hollow column 2, and the triangular protrusions 5 are located between two adjacent top grooves 6.
In this embodiment, the radial holes are distributed in multiple layers along the height direction of the cemented carbide hollow cylinder 2. The axial holes are formed on the hard alloy hollowed-out column body 2 in a plurality of concentric rings.
Example 2
The embodiment provides a cemented carbide forming substrate, and the specific structure is different from that of embodiment 1 in that: in this embodiment, in order to form an ultra-hard material layer on the top of the cemented carbide hollow cylinder, the top edge of the cylindrical cemented carbide outer ring layer 1 is higher than the top of the cemented carbide hollow cylinder.
Example 3
The embodiment provides a cemented carbide forming substrate, and the specific structure is different from that of embodiment 1 in that: in this embodiment, in order to obtain different mechanical properties at different positions, a plurality of radial holes are distributed in multiple layers along the height direction of the cemented carbide hollow cylinder, and the size of the opening of the radial holes at the outer side wall of the cemented carbide hollow cylinder is sequentially reduced from the upper layer to the lower layer.
Example 4
The embodiment provides a cemented carbide forming substrate, and the specific structure is different from that of embodiment 1 in that: in this embodiment, in order to obtain different mechanical properties at different positions, the axial holes are formed by a plurality of concentric rings and are formed on the cemented carbide hollowed-out cylinder, and the aperture of the axial hole on the outer concentric ring is larger than that of the axial hole on the inner concentric ring.
Example 5
The present embodiment provides a superhard composite sheet, as shown in fig. 3, comprising a filled superhard material column 8 and a superhard material layer 7 fully wrapped outside the filled superhard material column.
The superhard material filled cylinder 8 is formed by filling a plurality of axial holes 4 and a plurality of radial holes 3 in the hard alloy hollowed cylinder 2 provided in the embodiment 1 or the embodiment 2 or the embodiment 3 or the embodiment 4 with superhard micro powder and a bonding agent and then performing pressure sintering.
Example 6
The present embodiment provides a superhard compact, as shown in fig. 4, and the specific structure is different from that of embodiment 5 in that: in this embodiment, the superhard compact further comprises a cylindrical cemented carbide outer annular layer 1. The cylindrical hard alloy outer ring layer 1 is semi-wrapped outside the filled superhard material column 8, and the superhard material layer positioned at the top of the filled superhard material column 8 is not wrapped. And the filled superhard material cylinder 8 is wrapped in the centre of the superhard material layer 7.
Example 7
The present embodiment provides a superhard compact, as shown in fig. 5, and the specific structure is different from that of embodiment 6 in that: in this embodiment, the filled superhard material cylinder 8 is half-wrapped inside the superhard material layer 7, and the bottom of the filled superhard material cylinder 8 is in contact with the bottom of the cylindrical cemented carbide outer ring layer 1.
Specifically, the superhard composite sheet provided by the utility model is specifically manufactured as follows:
firstly preparing a hard alloy hollowed-out cylinder by using additive manufacturing laser printing equipment, manufacturing a cylindrical hard alloy outer ring layer by using a conventional forming method, and then placing the hard alloy hollowed-out cylinder in the cylindrical hard alloy outer ring layer;
and then pouring mixed powder formed by ultra-hard material micro powder and a bonding agent into the hard alloy hollowed-out column body and between the hard alloy hollowed-out column body and the cylindrical hard alloy outer ring layer, filling radial holes and axial holes by using the mixed powder, and performing pressing treatment by using a press. Then sintering at high temperature and high pressure in a hexahedral top press, and then machining to prepare the superhard cutter.
In the production of the superhard composite sheet shown in fig. 3, the outer annular layer of the outermost cylindrical cemented carbide is also required to be removed by processing after high-temperature high-pressure synthesis.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (10)
1. A cemented carbide forming substrate, characterized in that: the hard alloy hollow cylinder is placed in a cavity of the cylindrical hard alloy outer ring layer, and a plurality of radial holes and axial holes are formed in the hard alloy hollow cylinder;
and forming cavities for filling ultra-hard micro powder and binding agents in the radial holes, in the axial holes and between the hard alloy hollowed-out cylinder and the cylindrical hard alloy outer ring layer.
2. A cemented carbide shaped substrate according to claim 1, characterized by: the top edge of the cylindrical hard alloy outer ring layer is higher than the top of the hard alloy hollowed-out cylinder.
3. A cemented carbide shaped substrate according to claim 1 or 2, characterized by: the top surface of the hard alloy hollowed-out cylinder is provided with a plurality of top grooves, and the top grooves are formed by opening the upper parts of radial holes in the top surface of the hard alloy hollowed-out cylinder.
4. A cemented carbide shaped substrate according to claim 3, characterized by: the outer edge of the top surface of the hard alloy hollowed-out cylinder is provided with a plurality of triangular bulges, and the triangular bulges are positioned between two adjacent top grooves.
5. A cemented carbide shaped substrate according to claim 1, characterized by: the radial holes are distributed in multiple layers along the height direction of the hard alloy hollow column.
6. The cemented carbide shaped substrate of claim 5, wherein: the opening sizes of the radial holes at the outer side wall of the hard alloy hollowed-out column body are sequentially reduced from the upper layer to the lower layer.
7. A cemented carbide shaped substrate according to claim 1 or 2 or 5 or 6, characterized by: the diameters of the radial holes gradually shrink from the outer side wall of the hard alloy hollowed-out column body to the axial direction of the hard alloy hollowed-out column body, so that a plurality of radial holes with gradually shrinking diameters are formed.
8. A cemented carbide shaped substrate according to claim 1 or 2 or 5 or 6, characterized by: the axial holes are formed on the hard alloy hollowed-out cylinder in a plurality of concentric rings, and the aperture of the axial holes on the outer concentric ring is larger than that of the axial holes on the inner concentric ring.
9. A superhard compact, characterized in that: the super-hard material filling device comprises a filling super-hard material cylinder and a super-hard material layer which is fully wrapped or semi-wrapped outside the filling super-hard material cylinder;
the superhard material filled cylinder is formed by pressure sintering after filling a plurality of axial holes and a plurality of radial holes in the cemented carbide forming matrix according to any one of claims 1 to 8 with superhard micro powder and a bonding agent.
10. A superhard compact according to claim 9, wherein: the cylindrical hard alloy outer ring layer is semi-wrapped outside the filled superhard material cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321036252.0U CN220050043U (en) | 2023-05-04 | 2023-05-04 | Cemented carbide forming matrix and superhard composite sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321036252.0U CN220050043U (en) | 2023-05-04 | 2023-05-04 | Cemented carbide forming matrix and superhard composite sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220050043U true CN220050043U (en) | 2023-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321036252.0U Active CN220050043U (en) | 2023-05-04 | 2023-05-04 | Cemented carbide forming matrix and superhard composite sheet |
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| Country | Link |
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| CN (1) | CN220050043U (en) |
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- 2023-05-04 CN CN202321036252.0U patent/CN220050043U/en active Active
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