Alumina-titanium carbide composite ceramic cutter material and preparation process thereof

Abstract

The invention belongs to the technical field of high-performance cutter preparation, and particularly relates to an aluminum oxide-titanium carbide composite ceramic cutter material and a preparation process thereof, and the cutter material comprises the following components by mass: 50-60% of aluminum oxide, 20-40% of titanium carbonitride, 0.5-2% of cobalt, 1-10% of nickel, and 5-10% of an adhesive. The preparation technology comprises the steps of raw material proportioning, wet ball milling, drying granulation, dry pressing forming, cold isostatic pressing forming, high-pressure sintering, double-face grinding, periphery grinding, cutting edge passivation, PVD coating, inspection and packaging and the like. The key problems that in the prior art, density is low, crystal grains are coarse and large, toughness is insufficient, and the technology is difficult to scale are successfully solved, the prepared cutter material is excellent in comprehensive performance, the technology is stable and reliable, and extremely high industrial application value and market prospects are achieved.

Description

Technical Field

[0001] This invention belongs to the field of high-performance cutting tool manufacturing technology, specifically relating to an alumina-titanium carbide composite ceramic cutting tool material and its manufacturing process. Background Technology

[0002] In modern industrial manufacturing, especially in the precision machining industry, the performance of cutting tool materials directly affects machining efficiency and product quality. With the development of machining technology, the requirements for cutting tool materials are becoming increasingly stringent, demanding higher hardness, wear resistance, and impact resistance.

[0003] Currently, Al2O3-TiC composite ceramic cutting tool materials have become one of the research hotspots in the field of ceramic cutting tools. However, their preparation process still faces many technical challenges. For example, TiC particles tend to agglomerate in the Al2O3 matrix, resulting in uneven internal structure and affecting performance stability. The interfacial bonding state between Al2O3 and TiC plays a decisive role in the mechanical properties of the composite system. If the interfacial bonding is too weak, stress concentration will easily occur, leading to crack propagation. In addition, the sintering and densification of composite ceramics is difficult. Residual pores will reduce the density of the material, thereby affecting its hardness and wear resistance. Moreover, the existing Al2O3-TiC composite ceramic cutting tool materials preparation process is relatively complex and costly, making it unsuitable for large-scale production.

[0004] Therefore, developing a new type of cutting tool material with excellent comprehensive performance, controllable cost, simple preparation process, and easy mass production is of great practical significance and application value. Summary of the Invention

[0005] The purpose of this invention is to provide an alumina-titanium carbide composite ceramic cutting tool material and its preparation process that have excellent comprehensive performance, controllable cost, simple preparation process, and are easy to scale up, so as to solve the key problems in the prior art such as low density, coarse grains, insufficient toughness, and difficulty in scaling up the process.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: An alumina-titanium carbide composite ceramic cutting tool material, comprising the following components by mass percentage: 50-60% alumina, 20-40% titanium carbonitride, 0.5-2% cobalt, 1-10% nickel, and 5-10% binder.

[0007] Preferably, the above-mentioned alumina-titanium carbide composite ceramic cutting tool material comprises the following components by mass percentage: 50-55% alumina, 35-40% titanium carbonitride, 0.5-2% cobalt, 1-3% nickel, and 6-8% binder.

[0008] On the other hand, this invention proposes a preparation process for an alumina-titanium carbide composite ceramic cutting tool material, comprising the following steps: 1) Raw material ratio: Weigh the raw materials according to the formula ratio and mix them; 2) Wet ball milling: The mixed raw materials are subjected to wet ball milling until the particle size reaches 200nm to 1μm; 3) Drying and granulation: The slurry after ball milling is dried and granulated using a drying tower; 4) Dry pressing: The dried granules are dry pressed into shape; 5) Cold isostatic pressing: The blank after dry pressing is subjected to cold isostatic pressing. 6) High-pressure sintering: The blank formed by cold isostatic pressing is then subjected to high-pressure sintering; 7) Double-sided grinding: Grinding the sintered tool material on both sides; 8) Peripheral grinding: Peripheral grinding is performed on the tool material after double-sided grinding; 9) Edge dulling: The cutting edge of the tool material after peripheral grinding is dulled; 10) PVD coating: Applying a PVD coating to the tool material after the cutting edge has been dulled; 11) Inspection and Packaging: Inspect and package the PVD-coated tool materials.

[0009] Preferably, in step 2), the wet ball milling process takes 1-2 hours.

[0010] Preferably, in step 3), the drying temperature for drying granulation is 150°C and the drying time is 2 hours.

[0011] Preferably, in step 4), the pressure for dry pressing is 50-80 MPa.

[0012] Preferably, in step 5), the applied pressure for cold isostatic pressing is 200-300 MPa.

[0013] Preferably, in step 6), the high-pressure sintering temperature is 1600-1800℃, the time is 2-4h, and the pressure is 60-90MPa.

[0014] Preferably, in step 10), the thickness of the PVD coating is 1-3 μm.

[0015] The working principle of this invention is as follows: by combining wet ball milling with granulation spraying, uniform mixing of raw materials is ensured, sintering porosity is avoided, and density is improved. Simultaneously, the entire process results in low raw material loss and high yield, achieving excellent performance while maintaining a superior cost-effectiveness ratio. It successfully solves key problems in existing technologies such as low density, coarse grains, insufficient toughness, and difficulty in scaling up the process. The resulting tool material exhibits excellent comprehensive performance, stable and reliable processing, and possesses extremely high industrial application value and market prospects.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Reduced dependence on foreign countries: This invention reduces dependence on products from Japan, South Korea, and the United States by developing an independently developed alumina-titanium carbide composite ceramic cutting tool material preparation process, thereby improving the self-reliance and controllability of domestic industries.

[0017] 2. Improved processing efficiency: The prepared tool material has higher hardness and wear resistance, which can meet the needs of high-speed, high-efficiency and precision machining, thus improving processing efficiency.

[0018] 3. Enhanced tool toughness: This invention solves the problems of poor toughness and easy breakage of existing ceramic tools, making the tool material more stable and reliable in complex working conditions.

[0019] 4. Reduced production costs: By optimizing the formula and process, this invention achieves low raw material loss and high yield, thereby reducing production costs and improving the cost-effectiveness ratio.

[0020] 5. Improved large-scale production capacity: The process flow of this invention is stable and reliable, and easy to scale up, solving the problem of difficulty in scaling up existing technologies and improving production efficiency.

[0021] 6. Improved overall performance of cutting tool materials: The alumina-titanium carbide composite ceramic cutting tool material prepared by this invention has excellent overall performance, with higher hardness, wear resistance and impact resistance, while also having good toughness and being less prone to breakage, making it suitable for large-scale application.

[0022] 7. Enhanced market competitiveness: The successful implementation of this invention will enhance the market competitiveness of domestic cutting tool materials, reduce dependence on foreign countries, and strengthen the international competitiveness of domestic industries.

[0023] In summary, this invention successfully solves the key problems in the prior art, such as low density, coarse grains, insufficient toughness, and difficulty in scaling up the process. The tool material prepared has excellent comprehensive performance, stable and reliable process, and has extremely high industrial application value and market prospects. Attached Figure Description

[0024] The accompanying drawings provide a further understanding of the invention and form part of this specification, serving to explain the invention. These drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0025] Figure 1 This is a process flow diagram of the present invention in an embodiment. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0027] Example 1

[0028] The present invention proposes an alumina-titanium carbide composite ceramic cutting tool material, which comprises the following components by mass percentage: 50% alumina, 38.5% titanium carbonitride, 0.5% cobalt, 1% nickel, and 10% binder.

[0029] like Figure 1 As shown, this invention proposes a preparation process for the above-mentioned alumina-titanium carbide composite ceramic cutting tool material, including the following steps: 1) Raw material ratio: Weigh the raw materials according to the formula ratio and mix them; 2) Wet ball milling: The mixed raw materials are subjected to wet ball milling for 2 hours until the particle size reaches 200nm to 1μm; 3) Drying and granulation: The ball-milled slurry is dried and granulated in a drying tower at a temperature of 150℃ for 2 hours. 4) Dry pressing: The dried granules are dry pressed under a pressure of 50 MPa; 5) Cold isostatic pressing: The blank after dry pressing is subjected to cold isostatic pressing at a pressure of 300MPa; 6) High-pressure sintering: The blank formed by cold isostatic pressing is subjected to high-pressure sintering at a temperature of 1600℃ for 3 hours and a pressure of 60MPa. 7) Double-sided grinding: The sintered tool material is ground on both sides with a grinding depth of 0.2 mm; 8) Peripheral grinding: The tool material after double-sided grinding is subjected to peripheral grinding with a grinding amount of 0.1mm; 9) Edge dulling: The tool material after peripheral grinding is subjected to edge dulling treatment with a dulling angle of 10°; 10) PVD coating: Apply a PVD coating to the tool material after the cutting edge has been dulled. The thickness of the PVD coating is 1-3 μm. 11) Inspection and Packaging: Inspect and package the PVD-coated tool materials.

[0030] The working principle of this invention is as follows: by combining wet ball milling with granulation spraying, uniform mixing of raw materials is ensured, sintering porosity is avoided, and density is improved. Simultaneously, the entire process results in low raw material loss and high yield, achieving excellent performance while maintaining a superior cost-effectiveness ratio. It successfully solves key problems in existing technologies such as low density, coarse grains, insufficient toughness, and difficulty in scaling up the process. The resulting tool material exhibits excellent comprehensive performance, stable and reliable processing, and possesses extremely high industrial application value and market prospects.

[0031] Example 2

[0032] The only difference between this embodiment and Embodiment 1 is that the alumina-titanium carbide composite ceramic cutting tool material proposed in this embodiment includes the following components by mass percentage: 55% alumina, 35% titanium carbonitride, 2% cobalt, 2% nickel, and 6% binder.

[0033] Example 3

[0034] The only difference between this embodiment and Embodiment 1 is that the alumina-titanium carbide composite ceramic cutting tool material proposed in this embodiment includes the following components by mass percentage: 52% alumina, 38% titanium carbonitride, 1% cobalt, 3% nickel, and 6% binder.

[0035] Example 4

[0036] The only difference between this embodiment and Embodiment 1 is that the alumina-titanium carbide composite ceramic cutting tool material proposed in this embodiment includes the following components by mass percentage: 50% alumina, 40% titanium carbonitride, 1% cobalt, 1% nickel, and 8% binder.

[0037] Example 5

[0038] The only difference between this embodiment and Embodiment 1 is that the alumina-titanium carbide composite ceramic cutting tool material proposed in this embodiment includes the following components by mass percentage: 60% alumina, 20% titanium carbonitride, 2% cobalt, 8% nickel, and 10% binder.

[0039] Example 6

[0040] The only difference between this embodiment and Embodiment 1 is that the alumina-titanium carbide composite ceramic cutting tool material proposed in this embodiment includes the following components by mass percentage: 50% alumina, 30% titanium carbonitride, 1% cobalt, 10% nickel, and 9% binder.

[0041] Compared with the prior art, the alumina-titanium carbide composite ceramic cutting tool materials prepared in Examples 1-6 can all achieve a Vickers hardness of 1900-2200HV, a shear force of 50KN, and a cutting speed of 350-800m / min. They all have good wear resistance and impact resistance, as well as good toughness and are not easy to break, and can be used on a large scale.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. An alumina-titanium carbide composite ceramic cutting tool material, characterized in that: By weight percentage, it includes the following components: 50-60% alumina, 20-40% titanium carbonitride, 0.5-2% cobalt, 1-10% nickel, and 5-10% binder.

2. The alumina-titanium carbide composite ceramic cutting tool material according to claim 1, characterized in that, By weight percentage, it includes the following components: 50-55% alumina, 35-40% titanium carbonitride, 0.5-2% cobalt, 1-3% nickel, and 6-8% binder.

3. The preparation process of the alumina-titanium carbide composite ceramic cutting tool material according to claim 1 or 2, characterized in that: Includes the following steps: 1) Raw material ratio: Weigh the raw materials according to the formula ratio and mix them; 2) Wet ball milling: The mixed raw materials are subjected to wet ball milling until the particle size reaches 200nm to 1μm; 3) Drying and granulation: The slurry after ball milling is dried and granulated using a drying tower; 4) Dry pressing: The dried granules are dry pressed into shape; 5) Cold isostatic pressing: The blank after dry pressing is subjected to cold isostatic pressing. 6) High-pressure sintering: The blank formed by cold isostatic pressing is then subjected to high-pressure sintering; 7) Double-sided grinding: Grinding the sintered tool material on both sides; 8) Peripheral grinding: Peripheral grinding is performed on the tool material after double-sided grinding; 9) Edge dulling: The cutting edge of the tool material after peripheral grinding is dulled; 10) PVD coating: Applying a PVD coating to the tool material after the cutting edge has been dulled; 11) Inspection and Packaging: Inspect and package the PVD-coated tool materials.

4. The preparation process of an alumina-titanium carbide composite ceramic cutting tool material according to claim 3, characterized in that, In step 2), the wet ball milling process takes 1-2 hours.

5. The preparation process of an alumina-titanium carbide composite ceramic cutting tool material according to claim 3, characterized in that, In step 3), the drying temperature for drying granulation is 150℃ and the drying time is 2h.

6. The preparation process of an alumina-titanium carbide composite ceramic cutting tool material according to claim 3, characterized in that, In step 4), the pressure for dry pressing is 50-80 MPa.

7. The preparation process of an alumina-titanium carbide composite ceramic cutting tool material according to claim 3, characterized in that, In step 5), the applied pressure for cold isostatic pressing is 200-300 MPa.

8. The preparation process of an alumina-titanium carbide composite ceramic cutting tool material according to claim 6, characterized in that, In step 6), the high-pressure sintering temperature is 1600-1800℃, the time is 2-4h, and the pressure is 60-90MPa.

9. The preparation process of an alumina-titanium carbide composite ceramic cutting tool material according to claim 3, characterized in that, In step 10), the thickness of the PVD coating is 1-3 μm.

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