High-impact-toughness superhard material prepressing tire body

Abstract

The utility model relates to a prepressing tire body made of a high-impact-toughness superhard material. The high-impact-toughness superhard material prepressing tire body comprises superhard material layers which are overlapped with each other, the granularity of superhard material powder used by the superhard material layer is sequentially increased from top to bottom; the adjacent superhard material layers are connected through a nesting mechanism; the nesting mechanism comprises a boss and an inner recess which are respectively arranged on different superhard material layers; the boss is matched with the concave part; the superhard material layer comprises a top-layer minimum-granularity superhard tablet at the uppermost layer and a plurality of middle superhard material layers; and the bottom of the top-layer superhard tablet with the minimum particle size is provided with an inner recess. The utility model provides a superhard material prepressing tire body which can enable a lower superhard material layer to be inserted into an upper superhard material layer. Therefore, the bonding capacity between adjacent layers can be effectively improved; the boss is inserted into the inner concave part of the top-layer superhard tablet with the minimum particle size and can absorb impact energy together with the top-layer superhard tablet with the minimum particle size, so that the impact toughness of the top-layer superhard tablet with the minimum particle size is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of superhard materials, and in particular to a pre-compression carcass of a high-impact toughness superhard material. Background Technology

[0002] The superhard material pre-compression matrix refers to the material stacked inside a metal shielding cup before undergoing high-temperature and high-pressure sintering. The superhard material pre-compression matrix is ​​placed together with the cemented carbide matrix inside the metal shielding cup, which is then sealed. The sealed metal shielding cup is placed in a six-sided press and synthesized into a superhard material composite sheet using a high-pressure and high-temperature sintering process. The superhard material stacked inside the metal shielding cup is all in powder form; superhard material powders of different particle sizes exhibit different properties. Generally, superhard materials produced from small-particle-size superhard material powder exhibit better wear resistance than those produced from large-particle-size powder; conversely, superhard materials produced from large-particle-size powder exhibit better impact toughness than those produced from small-particle-size powder. Although existing technologies propose superhard material pre-compression matrixes that alternately stack large-particle superhard material powders and small-particle superhard materials, the superhard material layers generated by these pre-compression matrixes are distinct, and the bonding force between adjacent layers is relatively weak, making them easy to peel off. The superhard material layers generated by the small-particle superhard material powders still bear impact alone, and are easily damaged by impact. Similarly, the superhard material layers generated by the large-particle superhard material powders also bear wear alone, and are easily damaged by wear. Therefore, the effect of these superhard material pre-compression matrixes on improving impact toughness is limited. Utility Model Content

[0003] The purpose of this invention is to solve the above problems and provide a pre-compressed tire carcass made of a high-impact toughness superhard material.

[0004] The technical solution of this utility model is as follows: A high-impact toughness superhard material pre-compression body includes superimposed superhard material layers; the particle size of the superhard material powder used in the superhard material layers increases sequentially from top to bottom; adjacent superhard material layers exhibit different properties; the superhard material layer made of large-particle-size superhard material powder exhibits high impact toughness; the superhard material layer made of small-particle-size superhard material powder exhibits high wear resistance; adjacent superhard material layers are connected by a nesting mechanism; the nesting mechanism includes bosses and recesses respectively set on different layers of superhard material; the bosses and recesses match to improve the bonding ability between adjacent layers; the superhard material layer includes the top minimum particle size superhard pressing sheet and several medium superhard material layers; the top minimum particle size superhard pressing sheet exhibits high wear resistance; the top minimum particle size superhard pressing sheet is cold-pressed using a special mold. The bottom of the top-layer ultra-hard material with the smallest particle size has a concave shape; the medium-ultra-hard material layer adjacent to the top-layer ultra-hard material with the smallest particle size has a corresponding protrusion; the protrusion is inserted into the concave shape of the top-layer ultra-hard material with the smallest particle size, and can absorb impact energy together with the top-layer ultra-hard material with the smallest particle size, thereby improving the impact resistance and toughness of the top-layer ultra-hard material with the smallest particle size.

[0005] Preferably, the top outer edge of the top minimum particle size ultrahard tablet is chamfered to improve the cutting ability of the generated ultrahard material.

[0006] Preferably, the superhard material layer further includes a bottom superhard material layer; the bottom superhard material layer has a boss on its top; the bottom superhard material layer is used to contact the cemented carbide substrate.

[0007] Preferably, the boss is a square-sided boss, which can increase the bonding area between adjacent superhard material layers, thereby improving the bonding ability between adjacent material layers.

[0008] Preferably, the overlapping arrangement of the boss and the concave layer enables the smallest particle size of the ultra-hard pressing sheet in the top layer to be stably transferred to the bottom ultra-hard material layer, thereby improving the overall structural stability of the ultra-hard material layer.

[0009] Preferably, the superhard material layer is formed by cold pressing, which can improve the stacking efficiency of the superhard material layer.

[0010] Preferably, the superhard material powder is polycrystalline diamond powder.

[0011] Furthermore, the particle size range of polycrystalline diamond powder is 1 nm to 50 μm.

[0012] Preferably, the superhard material powder is cubic boron nitride powder.

[0013] Preferably, the depth of the concave part is 0.3~3mm, and the height of the protrusion part is 0.3~3mm.

[0014] The beneficial effects of this utility model are as follows: The high impact toughness superhard material pre-compressed tire carcass of this utility model has the following advantages:

[0015] (1) This utility model provides a pre-compression body of superhard material, which enables the lower superhard material layer to be inserted into the upper superhard material layer. This can effectively improve the bonding ability between adjacent layers; the boss is inserted into the concave part of the top minimum particle size superhard pressing sheet, which can absorb impact energy together with the top minimum particle size superhard pressing sheet, thereby improving the impact resistance and toughness of the top minimum particle size superhard pressing sheet;

[0016] (2) The overlapping of the protrusion and concave of this utility model enables the top layer of the smallest particle size ultra-hard pressing sheet to be stably transferred to the bottom ultra-hard material layer, thereby improving the overall structural stability of the ultra-hard material layer. Attached Figure Description

[0017] Figure 1 This utility model relates to a three-dimensional pre-compressed tire carcass made of high-impact toughness superhard material. Figure 1 ;

[0018] Figure 2 This utility model relates to a three-dimensional pre-compressed tire carcass made of high-impact toughness superhard material. Figure 2 ;

[0019] Figure 3 yes Figure 1 Top view;

[0020] Figure 4 yes Figure 3 AA section view;

[0021] Figure 5 It is a 3D view of the top-layer smallest particle size ultra-hard tablet;

[0022] Figure 6 This is a 3D diagram of the superhard material layer;

[0023] Figure 7 It is a 3D diagram of the bottom ultra-hard material layer;

[0024] In the figure: 11. Top layer with the smallest particle size ultra-hard pressing, 111. Chamfer, 12. Middle ultra-hard material layer, 13. Bottom ultra-hard material layer, 21. Boss, 22. Concave. Detailed Implementation

[0025] Example 1: See Figure 1-7A high-impact toughness superhard material pre-compression carcass includes superimposed superhard material layers; the particle size of the superhard material powder used in the superhard material layers increases sequentially from top to bottom; adjacent superhard material layers exhibit different properties; the superhard material layer made of large-particle-size superhard material powder exhibits high impact toughness; the superhard material layer made of small-particle-size superhard material powder exhibits high wear resistance; adjacent superhard material layers are connected by a nesting mechanism; the nesting mechanism includes bosses 21 and recesses 22 respectively disposed on different layers of superhard material; the bosses 21 and recesses 22 match to improve the bonding ability between adjacent layers; the superhard material layer includes the top minimum particle size superhard pressing sheet 11 and several medium superhard material layers 12; the top minimum particle size superhard pressing sheet 11 exhibits high wear resistance; the top minimum particle size superhard pressing sheet 11 is cold-pressed using a special mold. The bottom of the top-layer ultra-hard material sheet 11 with the smallest particle size is provided with a concave 22; the medium-ultra-hard material layer 12 adjacent to the top-layer ultra-hard material sheet 11 is provided with a protrusion 21; the protrusion 21 is inserted into the concave 22 of the top-layer ultra-hard material sheet 11, and can absorb impact energy together with the top-layer ultra-hard material sheet 11 to improve the impact resistance of the top-layer ultra-hard material sheet 11.

[0026] Compared with the prior art, this utility model provides a pre-compression carcass of superhard material, which allows the lower superhard material layer to be inserted into the upper superhard material layer. This can effectively improve the bonding ability between adjacent layers; the boss 21 is inserted into the concave 22 of the top minimum particle size superhard pressing sheet 11, and can absorb impact energy together with the top minimum particle size superhard pressing sheet 11, thereby improving the impact resistance and toughness of the top minimum particle size superhard pressing sheet 11.

[0027] The top outer edge of the top minimum particle size superhard pressing 11 is provided with a top chamfer 111 to improve the cutting ability of the generated superhard material.

[0028] The boss 21 is a square-sided boss 21, which can increase the bonding area between adjacent superhard material layers, thereby improving the bonding ability between adjacent material layers.

[0029] In this invention, the boss 21 can also be other shapes such as a conical boss 21 to improve the bonding ability between adjacent superhard material layers. In this embodiment, the boss 21 is a regular square boss 21.

[0030] The overlapping arrangement of the protrusion 21 and the concave 22 enables the top layer of the smallest particle size ultra-hard pressing sheet 11 to be stably transferred to the bottom ultra-hard material layer, thereby improving the overall structural stability of the ultra-hard material layer.

[0031] The superhard material layer 12 is formed by cold pressing, which can improve the stacking efficiency of the superhard material layer.

[0032] The superhard material powder is polycrystalline diamond powder.

[0033] The particle size range for polycrystalline diamond powder is 1 nm to 50 μm.

[0034] The depth of the concave part 22 is 0.3~3mm, and the height of the protrusion 21 is 0.3~3mm.

[0035] The working principle of this embodiment is as follows: adjacent superhard material layers exhibit different properties; the superhard material layer made of large-particle-size superhard material powder exhibits high impact toughness; the superhard material layer made of small-particle-size superhard material powder exhibits high wear resistance; the boss 21 and the recess 22 are matched to improve the bonding ability between adjacent layers; the top minimum particle size superhard pressing 11 exhibits high wear resistance; the top minimum particle size superhard pressing 11 is cold-pressed using a special mold. The bottom of the top minimum particle size superhard pressing 11 is provided with a recess 22; the medium superhard material layer 12 adjacent to the top minimum particle size superhard pressing 11 is provided with a boss 21; the boss 21 is inserted into the recess 22 of the top minimum particle size superhard pressing 11, and can absorb impact energy together with the top minimum particle size superhard pressing 11, thereby improving the impact toughness of the top minimum particle size superhard pressing 11.

[0036] Example 2: Example 2 is basically the same as Example 1, and the similarities will not be repeated. The difference is that the superhard material powder is cubic boron nitride powder.

[0037] Example 3: Example 3 is basically the same as Example 1, and the similarities will not be repeated. The difference is that the superhard material layer also includes a bottom superhard material layer 13; the bottom superhard material layer 13 has a boss 21 on its top; the bottom superhard material layer 13 is used to connect with the cemented carbide substrate.

[0038] The bottom superhard material layer 13 is formed by cold pressing, which can improve the stacking efficiency of the superhard material layer.

[0039] Example 4: Example 4 is basically the same as Example 3, and the similarities will not be repeated. The difference is that the middle superhard material layer 12 and the bottom superhard material layer 13 can also be formed by high temperature and high pressure sintering of superhard material powder. The formation process is as follows:

[0040] ① Manufacturing a tooling with a boss 21; the tooling may be a medium superhard material layer 12 or a bottom superhard material layer 13 produced by cold pressing.

[0041] ② Place the top layer of ultra-hard, smallest particle size sheet 11 at the bottom of the metal shielding cup;

[0042] ③ The mixture of superhard material powder and binder is placed into the metal shielding cup and spread out; the superhard material powder enters the concave 22 to form a protrusion 21; the superhard material powder is squeezed out using a tooling, leaving the concave 22.

[0043] ④ Alternately use large-particle-size superhard material powder and small-particle-size superhard material powder in step ③ until the superhard material layer reaches a suitable thickness.

[0044] ⑤ Stack the cemented carbide substrate on top of the superhard material layer; seal the metal shielding cup; send the metal shielding cup into a six-sided press for high-pressure and high-temperature sintering.

Claims

1. A high impact toughness superhard material preform comprising layers of superhard material stacked one on top of the other; characterised in that, The particle size of the superhard material powder used in the superhard material layer increases sequentially from top to bottom; adjacent superhard material layers are connected by a nesting mechanism; the nesting mechanism includes bosses and recesses respectively set on different superhard material layers; the bosses and recesses match each other; the superhard material layer includes the top minimum particle size superhard tablet and several medium superhard material layers; the bottom of the top minimum particle size superhard tablet is provided with a recess.

2. A high impact toughness super hard material preform according to claim 1, characterised in that: The top outer edge of the smallest particle size ultrahard tablet has a chamfered edge.

3. A high impact toughness super hard material preform according to claim 1, characterised in that: The superhard material layer also includes a bottom superhard material layer; the bottom superhard material layer has a boss on top.

4. The high impact toughness super hard material preform according to claim 1, wherein: The boss is a regular square-shaped boss.

5. The high impact toughness super hard material preform according to claim 1, wherein: The boss and the concave are set to coincide.

6. The high impact toughness super hard material preform according to claim 1, wherein: The superhard material layer is formed by cold pressing.

7. The high impact toughness super hard material preform according to claim 1, wherein: The superhard material powder is polycrystalline diamond powder.

8. The high impact toughness super hard material preform according to claim 1, wherein: The superhard material powder is cubic boron nitride powder.

9. The high impact toughness superhard material pre-compressed carcass according to claim 1, characterized in that: The depth of the concave part is 0.3~3mm, and the height of the protrusion part is 0.3~3mm.

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