Metal ceramic material containing rare metal elements as well as preparation method and application of metal ceramic material

Abstract

The invention discloses a metal ceramic material containing rare metal elements and a preparation method and application thereof.The metal ceramic material comprises a hard phase and a binding phase, the hard phase is bound through the binding phase, and the hard phase comprises a first black core, a second white core and gray ring layers wrapping the first black core and the second white core respectively; the grey ring layer and the second white core are each provided with rare metal elements in a solid solution mode, and the rare metal elements comprise the molybdenum element and the rhenium element. According to the preparation method of the metal ceramic material containing the rare metal elements, the production cost is low, the rhenium element is added in the form of MoRe alloy powder, pre-ball milling and combined sintering are conducted on the rhenium element and binding phase powder, Mo and Re in a binding phase and a hard phase are evenly distributed, a uniform organization structure is obtained, the abrasion resistance and toughness of metal ceramic are improved, and the service life of the metal ceramic material is prolonged. And the metal ceramic material has better reliability and durability in application.

Description

Technical Field

[0001] The present invention relates to the technical field of powder metallurgy, and in particular to a metal ceramic material containing rare metal elements, a preparation method and application thereof. Background Art

[0002] Ti(C,N)-based cermets are a new type of cermet material developed in the 1970s. They offer advantages such as low density, excellent chemical stability and oxidation resistance, low friction coefficient against steel, ability to cut refractory metals, and resistance to cutting adhesion and diffusion. Ti(C,N)-based cermets are suitable for high-speed and dry cutting of cast iron, ordinary steel, and high-hardness steel as tool materials, and outperform carbide tools. However, with the advancement of materials technology, the machinability of processed materials has deteriorated. Traditional Ti(C,N)-based cermets suffer from insufficient hardness, strength, and toughness, which significantly limits their widespread application. Therefore, improving the comprehensive mechanical properties of Ti(C,N)-based cermets is both crucial and urgent.

[0003] Chinese patent application CN2018116021913 discloses a pre-alloyed powder, a TiCN-based cermet composite material containing the pre-alloyed powder, and a preparation method thereof. By adding a Ru-Ti-Ni pre-alloyed melt, the alloy grains are refined, the binder phase is strengthened, and the mechanical properties of the cermet are improved and enhanced. However, ruthenium resources in my country are scarce, with annual production of only a few kilograms, less than 1% of demand. Therefore, ruthenium is largely imported, and the price of metallic Ru is extremely high, which significantly increases the cost of the cermet and greatly limits its application range. Therefore, how to improve the comprehensive mechanical properties of Ti(C,N)-based cermet materials while maintaining or slightly increasing costs has long been a research focus for materials researchers and an existing problem that urgently needs to be solved. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a metal ceramic material containing rare metal elements with low production cost and good hardness, as well as a preparation method and application thereof.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A metal ceramic material containing rare metal elements includes a hard phase and a bonding phase, wherein the hard phase is bonded by the bonding phase. The hard phase includes a first black core, a second white core, and a gray ring layer respectively covering the first black core and the second white core. The gray ring layer and the second white core respectively contain solid solutions of rare metal elements, wherein the rare metal elements include molybdenum and rhenium.

[0006] As a further improvement of the above technical solution: Rare metal elements, including molybdenum and rhenium, are solid-dissolved in the binder phase. These elements form a solid-solution-strengthened binder phase, improving its wear resistance and high-temperature performance, further enhancing the mechanical properties of the cermet material.

[0007] At least one of Option A, Option B, and Option C is met: A. The mass ratio of the rhenium element in the second white core to the rhenium element in the binder phase is 3.5-1.8:1; B. The mass ratio of the rhenium element in the gray ring layer to the rhenium element in the binder phase is 2.5-1.2:1; C. The mass ratio of the rhenium element in the second white core to the rhenium element in the gray ring layer is 2.3-1.1:1.

[0008] In backscattered electron imaging, the microstructure of cermets can be dark or light. Lighter colors indicate a higher concentration of elements with larger atomic weights, while lighter colors indicate a higher concentration of elements with smaller atomic weights. Re, in this case, has the largest atomic weight. Therefore, the rhenium content in the second white core is greater than that in the gray ring layer, which is greater than that in the binder phase. By controlling the mass ratio between the binder phase, the second white core, and the gray ring layer, the alloy's wear resistance is improved.

[0009] The binder phase also includes cobalt and nickel elements, satisfying: 1%≤m Re / (m Co +m Ni )≤10%,m Re 、m Co 、m Ni are the masses of rhenium, cobalt and nickel in the binder phase, respectively.

[0010] As a general inventive concept, the present invention also provides a method for preparing a cermet material containing rare metal elements, comprising the following steps: S1. Prepare the powder raw materials according to the following mass percentages: Hard phase powder: Ti (CN) powder: 40-70wt.%, TiC powder: 0-10wt.%, TaC powder: 1-10wt.%, NbC powder: 1-8wt.%, WC powder: 0-20wt.%, MoRe alloy powder: 3-20wt.%; Inhibitor powder: Cr3C2 powder: 0-2wt.%; Binder phase powder: Co powder: 3-15 wt.%, Ni powder: 3-15 wt.%, and the total content of Co and Ni powder is 8-25 wt.%; Other powders: C powder: 0.15-1.2wt.%; The content of rhenium in the MoRe alloy powder is 10-50wt.%; S2, pre-ball milling the powdered raw materials to obtain a mixed material; S3. Drying, granulating, molding and sintering the mixture to obtain a metal ceramic material containing rare metal elements.

[0011] Molybdenum-rhenium alloys include low-rhenium alloys (<10%) and medium-to-high-rhenium alloys (11% to 50%). In the present invention, the MoRe alloy powder has a high Re content, which helps improve the alloy's wear resistance.

[0012] As a further improvement of the above technical solution: Preferably, Ti(CN) powder: 50-70wt.%, TiC powder: 0-8wt.%, TaC powder: 1-8wt.%, NbC powder: 1-6wt.%, WC powder: 10-20wt.%, Cr3C2 powder: 0.05-2wt.%, MoRe alloy powder: 3-10wt.%, Co powder: 5-10 wt.%, Ni powder: 5-10wt.%, and the total content of Co and Ni powder is 8-25 wt.%, and C powder: 0.15-0.9wt.%.

[0013] Preferably, the rhenium content in the MoRe alloy powder is 25-50 wt.%; Preferably, the Fsss particle size of the MoRe alloy powder is less than 32 microns.

[0014] Preferably, the MoRe alloy powder has a Fsss particle size of less than 10 microns and a purity greater than 99%.

[0015] Preferably, the Fsss particle size of each powder raw material is less than 5 microns.

[0016] Satisfy mc=(0.0653m Mo +0.0644 m Re )×x, x=0.75~1.0, mc is the mass of carbon powder, m Mo 、m Re x represents the mass of molybdenum and rhenium in the MoRe alloy powder, respectively. Metal elements require corresponding carbon elements, for example, one tungsten element corresponds to one carbon element, one rhenium element corresponds to one carbon element, and two molybdenum elements correspond to one carbon element. If x is less than this range, the alloy will exhibit decarburization (brittle phase); if it is greater than this range, carburization (graphite phase) will occur. Preferably, x = 0.80-0.95.

[0017] Step S2 includes the following steps: A1. Mix the powder raw materials except Ti(CN) powder, TiC powder, TaC powder, NbC powder and WC powder, and pre-ball mill until the Fsss particle size of the powder is ≤5 μm; A2. Add Ti(CN) powder, TiC powder, TaC powder, NbC powder and WC powder and perform ball milling.

[0018] Generally speaking, the particle size of MoRe alloy is coarser than that of other raw materials. The first step of pre-ball milling is conducive to obtaining metal ceramics with controllable hard phase particle size. On the other hand, finer MoRe alloy is dissolved and precipitated more fully during the liquid phase sintering stage, thereby improving the uniformity of Mo and Re in the organizational structure.

[0019] In step S2, the pre-ball milling time is 10 hours to 50 hours, the ball milling time is 30 hours to 60 hours, the ball-to-material ratio is greater than 8:1, and the ball milling medium is anhydrous ethanol.

[0020] In step S3, the sintering includes sintering in stages.

[0021] The staged sintering comprises the following steps: The formed cemented carbide compact is removed from the forming agent, and the temperature is first raised to 1400-1420°C in a protective atmosphere for the first stage sintering for 5-30 minutes, then cooled to 1270-1330°C and sintered for 10-60 minutes, and then heated to 1460-1550°C and sintered for the second stage for 20-80 minutes under a pressure of 40 bar-80 bar.

[0022] The invention discloses an application of a metal ceramic material containing rare metal elements in cutting tools.

[0023] Compared with the prior art, the present invention has the following beneficial effects: In the cermet material containing rare metal elements of the present invention, the first ring layer, the second white core, and the second ring layer each contain solid solutions of rare metal elements, including molybdenum and rhenium. The solid solution of molybdenum and rhenium strengthens the hard phase, improving the wettability of the binder phase and the hard phase, increasing the density of the cermet material, refining the grain size of the hard phase, and thereby increasing the hardness and service life of the cermet material. Compared to the strengthening element Ru (ruthenium), rhenium (Re) is very affordable and relatively abundant in China. Therefore, the present invention can reduce the cost of the cermet material.

[0024] The preparation method of the metal ceramic material containing rare metal elements of the present invention has low production cost and is suitable for large-scale batch production application. The rhenium element is added in the form of MoRe alloy powder and pre-ball-milled with the binder phase powder, combined with sintering, so that Mo and Re in the binder phase and hard phase are evenly distributed, avoiding component segregation, obtaining a uniform organizational structure, improving the toughness of the metal ceramic, and making the metal ceramic material have better reliability and durability in application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the rare metal-containing metal ceramic material of the present invention.

[0026] The numbers in the figure represent: 1. first black core; 2. second white core; 3. gray ring layer; 4. bonding phase. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below. Unless otherwise specified, the instruments and materials used in the present invention are commercially available.

[0028] like Figure 1 As shown, the cermet material containing rare metal elements in this embodiment comprises a hard phase and a binder phase 4. The hard phase is bonded by the binder phase 4. The hard phase comprises a first black core 1, a second white core 2, and a gray ring layer 3 covering the first black core 1 and the second white core 2. The gray ring layer 3 and the second white core 2 each contain solid solutions of rare metal elements, including molybdenum and rhenium. The solid solution of molybdenum and rhenium strengthens the hard phase, improves the wettability of the binder phase 4 with the hard phase, increases the density of the cermet material, refines the grain size of the hard phase, and thus increases the hardness and service life of the cermet material. Compared to the strengthening element Ru (ruthenium), rhenium (Re) is very affordable and relatively abundant in China. Therefore, the present invention can reduce the cost of cermet materials.

[0029] The present invention provides a method for preparing a metal-ceramic material containing rare metal elements, comprising the following steps: S1. Prepare the powder raw materials according to the following mass percentages: The hard phase powder includes: Ti (CN) powder: 40-70wt.%, TiC powder: 0-10wt.%, TaC powder: 1-10wt.%, NbC powder: 1-8wt.%, WC powder: 0-20wt.%, MoRe alloy powder: 3-20wt.%; Inhibitor powder: Cr3C2 powder: 0-2wt.%, Binder phase powder: Co powder: 3-15wt.%, Ni powder: 3-15wt.%, and the total content of Co and Ni powder is 8-25wt.%; Other powders: C powder: 0.12-1.40wt.%; The content of rhenium in the MoRe alloy powder is 10-50wt.%; S2, pre-ball milling the powdered raw materials to obtain a mixed material; S3. Drying, granulating, molding and sintering the mixture to obtain a metal ceramic material containing rare metal elements.

[0030] In the preparation method of the present invention, the Re element is added in the form of MoRe alloy powder and pre-ball-milled with the binder phase powder, combined with sintering, so that the Mo and Re in the binder phase 4 and the hard phase are evenly distributed, avoiding component segregation, obtaining a uniform organizational structure, improving the toughness of the metal ceramic, and making the metal ceramic material have better reliability and durability in application.

[0031] Example 1 A method for preparing a rare metal-containing cermet material according to this embodiment comprises the following steps: (1) Prepare the powder raw materials according to the following mass percentages: Hard phase powder: Ti (CN) powder: 60.67wt.%, Fsss particle size is 1.2 microns; TaC powder: 2.41wt.%, Fsss particle size is 1.8 microns; NbC powder: 3.06wt.%, Fsss particle size is 2.1 microns; WC powder: 15.94wt.%, Fsss particle size is 0.7 microns; MoRe alloy powder: 4.9wt.%, Fsss particle size is 18 microns.

[0032] Inhibitor powder: Cr3C2 powder: 0.43wt.%, Fsss particle size is 1.1 microns; the inhibitor powder is used to inhibit the grain growth of the hard phase.

[0033] Binder phase powder: Co powder: 7.04wt.%, Fsss particle size less than 0.9 micron; Ni powder: 5.28wt.%, Fsss particle size less than 2.3 micron.

[0034] Other powders: C powder: 0.28wt.%, of which the Re content in MoRe alloy powder is 40.5wt.%, and the addition amount of C powder is m c =(0.0653m Mo +0.0644m Re )×x, x=0.90, m c is the mass of the toner, m Mo 、m Re are the masses of molybdenum and rhenium in the WRe alloy powder, respectively. C powder is used to control the carbon content in cermet materials.

[0035] (2) Wet grinding: Mix the raw materials of Cr3C2 powder, MoRe alloy powder, Co powder and Ni powder and pre-ball mill for 20 hours until the Fsss particle size of the powder is 1.7 μm. Then add Ti (CN) powder, TiC powder, TaC powder, WC powder and NbC powder and ball mill for 58 hours.

[0036] (3) The mixture is spray-dried and granulated.

[0037] (4) The granulated mixture is formed and sintered, and the sintering is a two-stage high-temperature pressure sintering. After the hard alloy compact obtained by forming is removed from the forming agent, the temperature is raised to 1410°C in an Ar atmosphere of 100 mbar for the first stage sintering, and the temperature is kept at this temperature for 20 minutes. The temperature is then lowered to 1300°C and kept at this temperature for 30 minutes. The temperature is then raised to 1480°C for the second stage sintering, and the temperature is kept at this temperature for 40 minutes under a pressure of 60 bar to obtain a metal ceramic material containing rare metals.

[0038] The rare metal element-containing cermet material of this embodiment includes a hard phase and a binder phase 4. The hard phase is bonded by the binder phase 4. The hard phase comprises a first black core 1, a second white core 2, and a gray ring layer 3 respectively covering the first black core 1 and the second white core 2. The gray ring layer 3 and the second white core 2 each contain solid solutions of rare metal elements, including molybdenum and rhenium. MoRe synergistically strengthens the hard phase and the binder phase 4, refines the hard phase grain size, and can improve the overall mechanical properties of the cermet material.

[0039] The mass ratio of Re elements in the second white core 2 and the bonding phase 4 is 2.1:1, the mass ratio of Re elements in the gray ring layer 3 and the bonding phase 4 is 1.4:1, the mass ratio of Re elements in the second white core 2 and the gray ring layer 3 is 1.5:1, and the bonding phase 4 satisfies: m Re / (m Co +m Ni ) = 2.8%, m Re 、m Co 、m Ni are the masses of rhenium, cobalt and nickel in the binder phase 4 respectively.

[0040] Comparative Example 1 A method for preparing a metal ceramic material is basically the same as that of Example 1, except that the MoRe alloy powder is replaced by Mo2C powder with the same mass percentage.

[0041] Table 1 below is a table of mechanical properties of the metal ceramic materials prepared in Example 1 and Comparative Example 1. Compared with Comparative Example 1, the metal ceramic material prepared in Example 1 has a relatively high density and better hardness, flexural strength and fracture toughness.

[0042] Table 1 Performance of metal ceramics prepared in Example 1 and Comparative Example 1

[0043] Using the metal ceramic materials of Example 1 and Comparative Example 1, WNMG080408TMT turning inserts were prepared and subjected to comparative turning tests on 45# steel. The cutting parameters are shown in Table 2. Comparative impact tests on 45# steel were also conducted, and the cutting parameters are shown in Table 3.

[0044] Table 2 Parameters of turning comparison test

[0045] Table 3 Parameters of impact comparison test

[0046] In the turning test, the criterion for judging tool failure is that the tool back face wear reaches 0.3μm or the cutting edge is chipped. In the impact test, the tools all failed in the form of chipping, and the impact time of the blades was compared. It can be seen from Table 4 that compared with the metal ceramic tool of Comparative Example 1, the metal ceramic tool produced in Example 1 has a longer cutting life and better wear resistance. It can be seen from Table 5 that compared with the metal ceramic tool of Comparative Example 1, the metal ceramic tool produced in Example 1 has better impact toughness and higher impact resistance. Therefore, the metal ceramic material of the present invention has better comprehensive mechanical properties.

[0047] Table 4 Test results of turning comparison test

[0048] Table 5 Test results of impact comparison test

[0049] Example 2 A method for preparing a rare metal-containing cermet material according to this embodiment comprises the following steps: (1) Prepare the powder raw materials according to the following mass percentages: Hard phase powder: Ti (CN) powder: 55.94wt.%, Fsss particle size is 1.2 microns; TiC powder: 1.89wt.%, Fsss particle size is 1.5 microns; TaC powder: 3.30wt.%, Fsss particle size is 1.8 microns; NbC powder: 1.01wt.%, Fsss particle size is 2.1 microns; WC powder: 14.39wt.%, Fsss particle size is 0.7 microns; MoRe alloy powder: 7.16wt.%, Fsss particle size is 18 microns.

[0050] Inhibitor powder: Cr3C2 powder: 0.44wt.%, Fsss particle size is 1.1 microns.

[0051] Binder phase powder: Co powder: 9.15wt.%, Fsss particle size less than 0.9 micron; Ni powder: 6.29wt.%, Fsss particle size less than 2.3 micron.

[0052] Other powders: C powder: 0.42wt.%, of which the Re content in MoRe alloy powder is 40.5wt.%, and the addition amount of C powder is m c =(0.0653m Mo +0.0644m Re )×x, x=0.90, m c is the mass of the toner, m Mo 、m Re are the masses of molybdenum and rhenium in WRe alloy powder respectively.

[0053] (2) Wet grinding: Mix the raw materials of Cr3C2 powder, MoRe alloy powder, Co powder and Ni powder and pre-ball mill for 25 hours. The Fsss particle size of the powder is 2.0 μm. Then add Ti (CN) powder, TiC powder, TaC powder, WC powder and NbC powder and ball mill for 55 hours.

[0054] (3) The mixture is spray-dried and granulated.

[0055] (4) The granulated mixture is formed and sintered, and the sintering is a two-stage high-temperature pressure sintering. After the hard alloy compact obtained by forming is removed from the forming agent, the temperature is raised to 1410°C in an Ar atmosphere of 100 mbar for the first stage sintering, and the temperature is kept at this temperature for 20 minutes. The temperature is then lowered to 1300°C and kept at this temperature for 30 minutes. The temperature is then raised to 1480°C for the second stage sintering, and the temperature is kept at this temperature for 40 minutes under a pressure of 60 bar to obtain a metal ceramic material containing rare metals.

[0056] The mass ratio of Re elements in the second white core 2 and the bonding phase 4 is 2.5:1, the mass ratio of Re elements in the gray ring layer 3 and the bonding phase 4 is 1.7:1, the mass ratio of Re elements in the second white core 2 and the gray ring layer 3 is 1.5:1, and the bonding phase 4 satisfies: m Re / (m Co +m Ni ) = 3.5%, m Re 、m Co 、m Ni are the masses of rhenium, cobalt and nickel in the binder phase 4 respectively.

[0057] Comparative Example 2 A metal ceramic material and a preparation method thereof are basically the same as those in Example 2, except that the MoRe alloy powder is replaced by Mo2C powder with the same mass percentage.

[0058] Comparative Example 3 A metal ceramic material and a preparation method thereof are substantially the same as those in Example 2, except that the MoRe alloy powder is replaced by Re powder having the same Re mass percentage and Mo2C powder having the same Mo mass percentage.

[0059] In Comparative Example 3, Mo2C powder and Re powder are added separately instead of MoRe alloy powder. In addition to being dissolved into the Co phase and then precipitated and grown on a certain hard phase, the metal element Mo2C will also form a hard phase with itself as the nucleus, resulting in element unevenness and even segregation.

[0060] Table 6 is a table of mechanical properties of the metal ceramic materials prepared in Example 2, Comparative Example 2, and Comparative Example 3. Compared with Comparative Example 2 and Comparative Example 3, the metal ceramic material prepared in Example 2 has better bending strength and fracture toughness.

[0061] Table 6 Performance of metal ceramics prepared in Examples and Comparative Examples

[0062] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A metal ceramic material containing rare metal elements, comprising a hard phase and a bonding phase (4), wherein the hard phase is bonded by the bonding phase (4), and the hard phase comprises a first black core (1), a second white core (2), and a gray ring layer (3) respectively coated on the outside of the first black core (1) and the second white core (2), characterized in that: The gray ring layer (3) and the second white core (2) respectively contain solid solutions of rare metal elements, and the rare metal elements include molybdenum and rhenium.

2. The cermet material containing rare metal elements according to claim 1, characterized in that: Rare metal elements are solid-dissolved in the bonding phase (4), and the rare metal elements include molybdenum and rhenium.

3. The cermet material containing rare metal elements according to claim 2, characterized in that: At least one of Option A, Option B, and Option C is met: A. The mass ratio of the rhenium element in the second white core (2) to the rhenium element in the binder phase (4) is 3.5-1.8:1; B. The mass ratio of the rhenium element in the gray ring layer (3) to the rhenium element in the binder phase (4) is 2.5-1.2:1; C. The mass ratio of the rhenium element in the second white core (2) to the rhenium element in the gray ring layer (3) is 2.3-1.1:

1.

4. The cermet material containing rare metal elements according to claim 2, characterized in that: The binder phase (4) also includes cobalt and nickel elements, satisfying: 1%≤m Re / (m Co +m Ni )≤10%,m Re 、m Co 、m Ni are the masses of rhenium, cobalt and nickel in the binder phase (4) respectively.

5. A method for preparing a metal-ceramic material containing rare metal elements, characterized in that: The following steps are involved: S1. Prepare the powder raw materials according to the following mass percentages: Hard phase powder: Ti (CN) powder: 40-70wt.%, TiC powder: 0-10wt.%, TaC powder: 1-10wt.%, NbC powder: 1-8wt.%, WC powder: 0-20wt.%, MoRe alloy powder: 3-20wt.%; Inhibitor powder: Cr3C2 powder: 0-2wt.%; Binder phase powder: Co powder: 3-15 wt.%, Ni powder: 3-15 wt.%, and the total content of Co and Ni powder is 8-25 wt.%, Other powders: C powder: 0.15-1.2wt.%; The content of rhenium in the MoRe alloy powder is 10-50wt.%; S2, pre-ball milling the powdered raw materials and ball milling to obtain a mixed material; S3. Drying, granulating, molding and sintering the mixture to obtain a metal ceramic material containing rare metal elements.

6. The method for preparing a metal-ceramic material containing rare metal elements according to claim 5, characterized in that: Satisfy m c =(0.0653m Mo +0.0644m Re )×x,x=0.75~1.0,m c is the mass of the toner, m Mo 、m Re are the masses of molybdenum and rhenium in MoRe alloy powder respectively.

7. The method for preparing a metal-ceramic material containing rare metal elements according to claim 5, characterized in that: Step S2 includes the following steps: A1. Mix the powder raw materials except Ti(CN) powder, TiC powder, TaC powder, NbC powder and WC powder, and pre-ball mill until the Fsss particle size of the powder is ≤5 μm; A2. Add Ti(CN) powder, TiC powder, TaC powder, NbC powder and WC powder and perform ball milling.

8. The method for preparing a metal-ceramic material containing rare metal elements according to claim 7, characterized in that: In step S2, the pre-ball milling time is 10 hours to 50 hours, the ball milling time is 30 hours to 60 hours, and the ball milling medium is anhydrous ethanol.

9. The method for preparing a metal-ceramic material containing rare metal elements according to claim 5, characterized in that: In step S3, the sintering includes staged sintering, and the staged sintering includes the following steps: The formed cemented carbide compact is removed from the forming agent, and the temperature is first raised to 1400-1420°C in a protective atmosphere for the first stage sintering for 5-30 minutes, then cooled to 1270-1330°C and sintered for 10-60 minutes, and then heated to 1460-1550°C and sintered for the second stage for 20-80 minutes under a pressure of 40 bar-80 bar.

10. Use of a metal ceramic material containing rare metal elements according to any one of claims 1 to 4 or a metal ceramic material containing rare metal elements prepared by the method for preparing the metal ceramic material containing rare metal elements according to any one of claims 5 to 9 in a cutting tool.

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