Crushing method of nickel-based rare earth intermediate alloy

Abstract

The invention belongs to the technical field of alloy crushing, and particularly relates to a nickel-based rare earth intermediate alloy crushing method. The nickel-based rare earth intermediate alloy crushing method comprises the following steps that S1, pouring is conducted, specifically, a nickel-based rare earth intermediate alloy is poured into a plate-shaped alloy; s2, pre-vacuumizing is conducted, specifically, the obtained plate-shaped alloy is cleaned and then placed in a vacuum gas quenching furnace to be subjected to pre-vacuumizing; s3, heating is conducted, specifically, the plate-shaped alloy obtained after vacuumizing is conducted is heated; s4, gas quenching is conducted, specifically, the heated alloy is subjected to gas quenching; s5, crushing is conducted, specifically, the alloy subjected to gas quenching is crushed, and an alloy block is obtained; s6, ultrasonic treatment is conducted, specifically, the obtained alloy block is subjected to ultrasonic treatment; and S7, hydrogen charging, wherein the obtained alloy block is subjected to hydrogen sound charging treatment, and a final product is obtained. The proper crushing pretreatment process is selected according to the phase diagram of the alloy, so that the alloy product is high in rare earth solid solubility and low in alloy melting point, additional crushing equipment does not need to be purchased, the crushing efficiency can be improved at low cost, and meanwhile, the service life of the crushing equipment is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of alloy crushing, and in particular relates to a crushing method for a nickel-based rare earth master alloy. Background Art

[0002] Nickel-yttrium alloy can be used as a coating material to improve the corrosion resistance of the base material, and has a high application value in the aerospace field. During the production process, nickel-yttrium alloy needs to be crushed into alloy particles with a size of 5 to 10 mm, but nickel-yttrium alloy itself is a material that is difficult to crush. The direct use of a mechanical crusher combined with direct manual crushing cannot achieve the purpose of crushing even if the equipment is damaged, and the production efficiency is very slow. For products with high composition requirements, a separate crushing production line must be used, which is costly. In addition, other factors that can interfere with the composition must be avoided during the crushing process, so the material must be partially pre-treated to make it easier to crush without affecting the composition. Summary of the invention

[0003] The purpose of the present invention is to provide a method for crushing a nickel-based rare earth master alloy, so as to achieve effective crushing of the nickel-based rare earth master alloy without affecting the composition of the alloy and reducing the crushing cost.

[0004] To this end, the present invention provides the following technical solutions.

[0005] One aspect of the present invention provides a method for crushing a nickel-based rare earth master alloy, the crushing method comprising the following steps: S1: Casting: Casting the nickel-based rare earth master alloy into a plate-shaped alloy; S2: Pre-vacuuming: the obtained plate-shaped alloy is placed in a vacuum gas quenching furnace for pre-vacuuming after cleaning; S3: Heating: heating the vacuumed plate-shaped alloy; S4: gas quenching: gas quenching the heated alloy; S5: Crushing: crushing the gas-quenched alloy to obtain alloy blocks; S6: Ultrasonic treatment: subjecting the obtained alloy block to ultrasonic treatment; S7: hydrogen charging: subjecting the obtained alloy block to hydrogen charging and sonication treatment to obtain the final product.

[0006] In some preferred embodiments, in step S1, the size of the plate-shaped alloy is between 350×200×80 and 400×400×400 mm.

[0007] In some preferred embodiments, in step S2, the vacuum degree of the pre-vacuuming is 0.01-0.03 Pa.

[0008] In some preferred embodiments, in step S3, the heating process is: first, heating to 700-900°C at a heating rate of 1-5°C / min and keeping warm for 20 minutes, then heating to 1000-1300°C at a heating rate of 8-12°C / min and keeping warm for 20-40 minutes.

[0009] In some preferred embodiments, in step S4, the gas quenching conditions are: using argon with a purity of not less than 99.999%, an inflation pressure of 80-120 kPa, an air cooling fan speed of 2500-3500 rpm, and gas quenching to room temperature before taking out of the furnace.

[0010] In some preferred embodiments, in step S5, the crushing process is performed by manually crushing with a hammer.

[0011] In some preferred embodiments, in step S5, the size of the alloy block is between 30 and 50 mm.

[0012] In some preferred embodiments, in step S6, the ultrasonic conditions are: intensity of 80% amplitude, frequency of 20-30 kHz, and time of 10-20 min.

[0013] In some preferred embodiments, in step S7, the hydrogen charging is performed by electrolysis.

[0014] In some preferred embodiments, the electrolytic hydrogen charging conditions are: a platinum electrode is used as the positive electrode, an alloy block is used as the negative electrode, and a 30% mass fraction sodium chloride solution is used as the electrolyte.

[0015] In some preferred embodiments, the electrolysis voltage is 4-6 V and the current density is 400-500 mA / cm 2 .

[0016] Another aspect of the present invention also provides a nickel-based rare earth intermediate alloy block obtained by crushing according to the above method.

[0017] By means of the above technical solution, the present invention has at least the following advantages: 1. The present invention selects a suitable pre-crushing treatment process according to the phase diagram of the alloy: pouring → pre-vacuuming → heating → gas quenching → ultrasound → hydrogen charging, so that the rare earth solid solubility in the product is large and the alloy melting point is low. In the crushing process of the present invention, there is no need to purchase additional crushing equipment, which can not only increase the crushing efficiency at a low cost, but also increase the service life of the crushing equipment, so that the crushing performance is significantly improved, and the product after crushing meets the requirements.

[0018] 2. The present invention reduces the load of the crushing equipment by controlling the pouring size, selects the appropriate heat treatment temperature in combination with the product size, phase diagram and actual test results, and pre-crushes the nickel-yttrium alloy into a particle size suitable for subsequent hydrogenation crushing while ensuring that the alloy composition should not be affected. By selecting a suitable hydrogenation crushing process and utilizing the residual hydrogen inside the alloy after hydrogenation, the oxygenation problem in the subsequent crushing process is improved.

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The microstructure state diagrams of the alloy of Example 1 of the present invention are as follows: (a) is the original micrograph of the alloy; (b) is the micrograph of the alloy obtained after gas quenching; Figure 2 This is a physical picture of an alloy block obtained by the method of Example 1 of the present invention; Figure 3 This is a physical picture of the alloy block obtained by the method of Comparative Example 1 of the present invention. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] As an embodiment of the present invention, a method for crushing a nickel-based rare earth master alloy is provided, and the crushing method comprises the following steps: S1: Casting: Casting the nickel-based rare earth master alloy into a plate-shaped alloy; S2: Pre-vacuuming: the obtained plate-shaped alloy is placed in a vacuum gas quenching furnace for pre-vacuuming after cleaning; S3: Heating: heating the vacuumed plate-shaped alloy; S4: gas quenching: gas quenching the heated alloy to obtain an alloy block; S5: Crushing: crushing the gas-quenched alloy to obtain alloy blocks; S6: Ultrasonic treatment: subjecting the obtained alloy block to ultrasonic treatment; S7: hydrogen charging: subjecting the obtained alloy block to hydrogen charging and sonication treatment to obtain the final product.

[0023] As for the selection of product size during the casting process, since the subsequent crushing during the hydrogen charging process involves the process of hydrogen combining on the surface of the alloy material and diffusing into the alloy, as well as the subsequent problem of hydrogen atom escape, different materials have different diffusion rates, and it is necessary to select the right raw material size. Therefore, the preferred casting size of the present invention is a thin plate between 350 mm long, 200 mm wide, 80 mm high and 400 mm long, 400 mm wide, 400 mm high. If the size is too large, the load of the subsequent crushing equipment will be increased, and if the size is too small, the hydrogen charging efficiency will be affected.

[0024] Therefore, as another embodiment of the present invention, in step S1, the size of the plate-shaped alloy is between 350×200×80 and 400×400×400 mm.

[0025] Before crushing, the cast nickel-based rare earth alloy plate is subjected to vacuum gas quenching heat treatment. The rare earth content of the nickel-based rare earth alloy crushed this time is about 30%. Combined with the phase diagram and experimental test, the grain boundary energy is reduced after being kept at a temperature below the melting point of 80°C for a period of time, so that the brittle phase and impurity elements and primary melts are precipitated in large quantities at the grain boundaries or between dendrites, increasing the brittleness of the material. Artificial crushing can then be performed, which can significantly reduce the difficulty of crushing. The alloy is crushed into small pieces with a maximum side length of no more than 50 mm but not less than 30 to prepare for subsequent hydrogen charging. Too small a size will result in a more thorough escape of hydrogen after hydrogen charging, affecting the effect of subsequent atmosphere improvement.

[0026] Therefore, as another embodiment of the present invention, in step S2, the vacuum degree of the pre-vacuuming is 0.01~0.03Pa, for example, it can be 0.01Pa, 0.02Pa or 0.03Pa, preferably 0.02Pa.

[0027] As another embodiment of the present invention, in step S3, the heating process is: firstly, the temperature is raised to 700-900°C at a heating rate of 1-5°C / min and kept at this temperature for 10-30 minutes, and then the temperature is raised to 1000-1300°C at a heating rate of 8-12°C / min and kept at this temperature for 20-40 minutes. If the thickness of the cast product increases by 5 cm, the heating rate of the first stage is reduced by 1°C / min, and the holding time is increased by 5 minutes.

[0028] Use high-pressure gas (such as nitrogen, helium) to pass through the surface of the workpiece to quickly cool the workpiece. The thermal conductivity of gas as the quenching medium is low, but the cooling effect can be increased by increasing the gas flow rate and pressure. During the gas quenching process, the cooling rate can be controlled by adjusting the gas flow rate and pressure to meet the needs of different workpieces.

[0029] Therefore, as another embodiment of the present invention, in step S4, the gas quenching conditions are: using argon gas with a purity of not less than 99.999%, the inflation pressure is 80-120 kPa, the air cooling fan speed is 2500-3500 rpm, and the gas quenching is performed to room temperature before being taken out of the furnace. Exemplarily, the suitable inflation pressure may be 80 kPa, 90 kPa, 100 kPa, 110 kPa or 120 kPa, preferably 100 kPa. Exemplarily, the suitable air cooling fan speed may be 2500 rpm, 3000 rpm or 3500 rpm, preferably 3000 rpm.

[0030] Therefore, as another embodiment of the present invention, in step S5, the crushing process is: using a hammer to crush the thin plate manually. This step has no special requirements, and only crushes the alloy plate along the cracks generated after gas quenching to facilitate subsequent loading into the ultrasonic equipment.

[0031] Before hydrogen charging, the broken alloy blocks can be ultrasonically treated in distilled water. The cavitation effect generated by ultrasound can not only further expand the existing cracks, but also cause cavitation corrosion on the alloy surface without changing the composition, which is conducive to the subsequent combination of hydrogen and the surface. Compared with chemical surface treatment, ultrasonic treatment does not produce industrial wastewater during the production process.

[0032] Therefore, as another embodiment of the present invention, in step S6, the ultrasonic conditions are: intensity of 80% amplitude, frequency of 20-30kHz, and time of 10-20min. Exemplarily, the suitable frequency may be 20kHz, 25kHz or 30kHz, preferably 25kHz. Exemplarily, the suitable time may be 10min, 15min or 20min, preferably 15min.

[0033] The hydrogen charging process uses the electrolytic hydrogen charging method. The container containing the crushed nickel-based rare earth alloy is filled with a sodium chloride aqueous solution that covers the surface of the alloy. The mass fraction of the sodium chloride solution is 30%. The crushed nickel-based rare earth alloy has an irregular shape and can be simply placed to ensure that there are gaps and some parts are in contact with each other. During the hydrogen charging process, a DC current supplier, an electrolytic cell, a copper wire, a NiY alloy block, and a platinum electrode are prepared. One end of a wire is connected to the positive pole of the power supply, and the other end is connected to the platinum electrode; one end of the other wire is connected to the negative pole of the power supply, and the other end is connected to the nickel-based rare earth alloy. During the electrolysis process, the voltage is selected to be 5V, and the current is adjusted according to the number of samples processed each time to control the current density at 450mA / cm 2 The electrolytic hydrogen charging process is safe and will not pose any safety hazard compared to direct hydrogen charging.

[0034] Therefore, as another embodiment of the present invention, in step S7, the hydrogen charging is performed by electrolysis.

[0035] Exemplarily, the electrolytic hydrogen charging conditions are: a platinum electrode as the positive electrode, an alloy block as the negative electrode, and a 30% by mass sodium chloride solution as the electrolyte.

[0036] Furthermore, the voltage of the electrolysis is 4-6 V, and the current density is 400-500 mA / cm 2 For example, the suitable voltage is 4 V, 5 V or 6 V, preferably 5 V. For example, the suitable current density is 400 mA / cm 2 , 450 mA / cm 2 or 500 mA / cm 2 , preferably 450 mA / cm 2 .

[0037] Unless otherwise specified, the percentage content involved in the present invention refers to mass percentage for solid-liquid mixing and solid-solid mixing, and refers to volume percentage for liquid-liquid mixing.

[0038] Unless otherwise specified, the percentage concentrations referred to in the present invention all refer to final concentrations, which refer to the percentage of the added component in the system after the addition of the component.

[0039] The temperature parameters in the present invention, if not specifically limited, allow for both constant temperature treatment and treatment within a certain temperature range. The constant temperature treatment allows the temperature to fluctuate within the precision range controlled by the instrument.

[0040] Unless otherwise specified, the experimental methods used in the following examples are all conventional methods.

[0041] Unless otherwise specified, the NiY alloy (NiY-20240506), NiLa alloy (NiLa-20231205), and TaTe alloy (TaFe-20240812) used in the following examples are all homemade products of the applicant, and other materials, reagents, etc. can be obtained from commercial channels.

[0042] Example 1: Crushing of NiY alloy; Sample preparation: NiY alloy was cast into a plate-shaped alloy product with a size of 40 cm (microstructure as shown in FIG. Figure 1 (as shown in a)). After cleaning the refractory materials remaining on the surface of the obtained plate-shaped alloy product, put it into a vacuum gas quenching furnace and pre-evacuate it to a vacuum degree of 0.01Pa. Then start heating, first increase the temperature to 800℃ at a heating rate of 5℃ / min and keep it warm for 20 minutes. Then increase the temperature to 1150℃ at a heating rate of 10℃ / min and keep it warm for 30 minutes. After the insulation is completed, gas quench it. For gas quenching, use argon gas with a purity of not less than 99.999%, the inflation pressure is 100kpa, the air cooling fan speed is 2900r / min, and the gas quenching is done to room temperature and then it can be taken out of the furnace (the microstructure is shown in the figure). Figure 1(b)).

[0043] Crushing: The gas-quenched alloy is crushed, that is, the plate-shaped alloy plate is naturally broken along the gas-quenching cracks by artificially using a hammer to obtain alloy blocks.

[0044] Ultrasonic treatment stage: The crushed alloy block is placed in an ultrasonic cleaning machine. The equipment should be filled with distilled water that covers the surface of the sample. The ultrasonic intensity is set to 80% amplitude, 25kHz frequency, and time for 15 minutes.

[0045] Hydrogen charging stage: prepare a DC current supply, an electrolytic cell, a copper wire, a NiY alloy block, and a platinum electrode. One end of a wire is connected to the positive electrode of the power supply and the other end is connected to the platinum electrode, and the other end is connected to the negative electrode of the power supply and the nickel-yttrium alloy. Put the alloy and the platinum electrode into an electrolytic cell filled with a 30% mass fraction of sodium chloride solution, adjust the voltage to 5V, and adjust the current so that the current density reaches 450mA / cm 2 The power-on time is 8 hours, and the final product is obtained with a particle size between 5 and 10 mm. Figure 2 shown.

[0046] Example 2: Crushing of NiLa alloy; Sample preparation: NiLa alloy is cast into a plate-shaped alloy product with a size of 40 cm. After cleaning the refractory materials remaining on the surface of the obtained plate-shaped alloy product, it is loaded into a vacuum gas quenching furnace and pre-evacuated to a vacuum degree better than 0.01 Pa. Then start heating, first increase the temperature to 800°C at a heating rate of 5°C / min and keep it warm for 20 minutes. Then increase the temperature to 1080°C at a heating rate of 10°C / min and keep it warm for 30 minutes. After the insulation is completed, gas quench. For gas quenching, use argon gas with a purity of not less than 99.999%, the inflation pressure is 100kpa, the air cooling fan speed is 2900r / min, and the gas quenching is done to room temperature and the furnace is ready.

[0047] Crushing: The gas-quenched alloy is crushed, that is, the plate-shaped alloy plate is naturally broken along the gas-quenching cracks by artificially using a hammer to obtain alloy blocks.

[0048] Ultrasonic treatment stage: The crushed alloy block is placed in an ultrasonic cleaning machine. The equipment should be filled with distilled water that covers the surface of the sample. The ultrasonic intensity is set to 80% amplitude, 25kHz frequency, and time for 15 minutes.

[0049] Hydrogen charging stage: prepare a DC current supply, an electrolytic cell, a copper wire, a NiY alloy block, and a platinum electrode. One end of a wire is connected to the positive electrode of the power supply and the other end is connected to the platinum electrode, and the other end is connected to the negative electrode of the power supply and the nickel-yttrium alloy. Put the alloy and the platinum electrode into an electrolytic cell filled with a 30% mass fraction of sodium chloride solution, adjust the voltage to 5V, and adjust the current so that the current density reaches 420mA / cm 2The power-on time is 8 hours, and the final product has a particle size between 5 and 10 mm.

[0050] Example 3: Sample preparation: The TaTe alloy is cast into a plate-shaped alloy product with a size of 40 cm. After cleaning the refractory materials remaining on the surface of the obtained plate-shaped alloy product, it is loaded into a vacuum gas quenching furnace and pre-evacuated to a vacuum degree better than 0.01 Pa. Then start heating, increase the temperature to 1100°C at a heating rate of 10°C / min, and keep warm for 30 minutes. After the insulation is completed, gas quench. For gas quenching, use argon gas with a purity of not less than 99.999%, an inflation pressure of 100kpa, and an air cooling fan speed of 2900r / min. Quench to room temperature and take out of the furnace.

[0051] Crushing: The gas-quenched alloy is crushed, that is, the plate-shaped alloy plate is naturally broken along the gas-quenching cracks by artificially using a hammer to obtain alloy blocks.

[0052] Ultrasonic treatment stage: The crushed alloy block is placed in an ultrasonic cleaning machine. The equipment should be filled with distilled water that covers the surface of the sample. The ultrasonic intensity is set to 80% amplitude, 25kHz frequency, and time for 15 minutes.

[0053] Hydrogen charging stage: prepare a DC current supply, an electrolytic cell, a copper wire, a TaTe alloy block, and a platinum electrode. One end of a wire is connected to the positive electrode of the power supply and the other end is connected to the platinum electrode, and the other end is connected to the negative electrode of the power supply and the TaTe alloy. Put the alloy and the platinum electrode into an electrolytic cell filled with a 30% mass fraction of sodium chloride solution, adjust the voltage to 5V, and adjust the current so that the current density reaches 420mA / cm 2 The power-on time is 8 hours, and the final product has a particle size between 5 and 10 mm.

[0054] Comparative Example 1: Crushing of NiY alloy Sample preparation: NiY alloy was cast into a plate-shaped alloy product with a size of 40 cm.

[0055] Direct crushing: Use jaw crusher for crushing. The alloy block size after crushing is larger than 50mm, which does not meet the demand and causes great damage to the equipment. Figure 3 shown.

[0056] Comparative Example 2: Crushing of NiY alloy Sample preparation: NiY alloy is cast into a plate-shaped alloy product with a size of 40 cm. After cleaning the refractory material remaining on the surface of the obtained plate-shaped alloy product, it is loaded into a vacuum gas quenching furnace and pre-evacuated to a vacuum degree of 0.01 Pa. Then gas quenching is performed. For gas quenching, argon gas with a purity of not less than 99.999% is used, the filling pressure is 100kpa, the speed of the air cooling fan is 2900r / min, and the gas quenching is performed until room temperature and then it can be taken out of the furnace.

[0057] Crushing: The gas-quenched alloy is crushed, that is, the plate-shaped alloy plate is naturally broken along the gas-quenching cracks by artificially using a hammer to obtain alloy blocks.

[0058] Ultrasonic treatment stage: The crushed alloy block is placed in an ultrasonic cleaning machine. The equipment should be filled with distilled water that covers the surface of the sample. The ultrasonic intensity is set to 80% amplitude, 25kHz frequency, and time for 15 minutes.

[0059] Hydrogen charging stage: prepare a DC current supply, an electrolytic cell, a copper wire, a NiY alloy block, and a platinum electrode. One end of a wire is connected to the positive electrode of the power supply and the other end is connected to the platinum electrode, and the other end is connected to the negative electrode of the power supply and the nickel-yttrium alloy. Put the alloy and the platinum electrode into an electrolytic cell filled with a 30% mass fraction of sodium chloride solution, adjust the voltage to 5V, and adjust the current so that the current density reaches 450mA / cm 2 The power-on time is 8 hours, and the final product has a particle size greater than 50 mm.

[0060] Comparative Example 3: Crushing of NiY alloy Sample preparation: NiY alloy was cast into a plate-shaped alloy product with a size of 40 cm. After cleaning the refractory material remaining on the surface of the obtained plate-shaped alloy product, it was placed in a vacuum quenching furnace and pre-evacuated to a vacuum degree of 0.01 Pa. Then heating was started, firstly at a heating rate of 5°C / min to 800°C and kept at this temperature for 20 minutes. Then, the temperature was raised to 1150°C at a heating rate of 10°C / min and kept at this temperature for 30 minutes.

[0061] Crushing: The heat-insulated alloy is crushed, that is, the plate-shaped alloy plate is naturally crushed along the gas quenching cracks by artificially using a hammer to obtain an alloy block.

[0062] Ultrasonic treatment stage: The crushed alloy block is placed in an ultrasonic cleaning machine. The equipment should be filled with distilled water that covers the surface of the sample. The ultrasonic intensity is set to 80% amplitude, 25kHz frequency, and time for 15 minutes.

[0063] Hydrogen charging stage: prepare a DC current supply, an electrolytic cell, a copper wire, a NiY alloy block, and a platinum electrode. One end of a wire is connected to the positive electrode of the power supply and the other end is connected to the platinum electrode, and the other end is connected to the negative electrode of the power supply and the nickel-yttrium alloy. Put the alloy and the platinum electrode into an electrolytic cell filled with a 30% mass fraction of sodium chloride solution, adjust the voltage to 5V, and adjust the current so that the current density reaches 450mA / cm 2 The power-on time is 8 hours, and the final product has a particle size greater than 50 mm.

[0064] like Figure 1As shown in the figure, the alloy structure without any treatment is intact (a), while the alloy structure after pouring → pre-vacuuming → heating → gas quenching shows more cracks (b), so the alloy pre-treated by the present invention is more easily broken. Figure 2 and Figure 3 It can be seen that compared with the products obtained after crushing in different ways, the alloy particles obtained by the method in Example 1 of the present invention have smaller particle sizes and are evenly distributed, which meets the standards.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for crushing a nickel-based rare earth master alloy, characterized in that: The crushing method The following steps are involved: S1: Casting: Casting the nickel-based rare earth master alloy into a plate-shaped alloy; S2: Pre-vacuuming: the obtained plate-shaped alloy is placed in a vacuum gas quenching furnace for pre-vacuuming after cleaning; S3: Heating: heating the vacuumed plate alloy; S4: gas quenching: gas quenching the heated alloy; S5: Crushing: crushing the gas-quenched alloy to obtain alloy blocks; S6: Ultrasonic treatment: subjecting the obtained alloy block to ultrasonic treatment; S7: hydrogen charging: subjecting the obtained alloy block to hydrogen charging and sonication treatment to obtain the final product.

2. The crushing method according to claim 1, characterized in that: In step S1, the size of the plate-shaped alloy is between 350×200×80 and 400×400×400 mm.

3. The crushing method according to claim 1, characterized in that: In step S2, the vacuum degree of the pre-vacuuming is 0.01-0.03Pa.

4. The crushing method according to claim 1, characterized in that: In step S3, the heating process is: firstly, heating to 700-900°C at a heating rate of 1-5°C / min and keeping warm for 10-30min, then heating to 1000-1300°C at a heating rate of 8-12°C / min and keeping warm for 20-40min.

5. The crushing method according to claim 1, characterized in that: In step S4, the gas quenching conditions are: using argon gas with a purity of not less than 99.999%, the inflation pressure is 80-120 kPa, the speed of the air cooling fan is 2500-3500 rpm, and the gas quenching is performed to room temperature before being taken out of the furnace.

6. The crushing method according to claim 1, characterized in that: In step S6, the ultrasonic conditions are: intensity of 80% amplitude, frequency of 20-30 kHz, and time of 10-20 min.

7. The crushing method according to claim 1, characterized in that: In step S7, the hydrogen charging is performed by electrolysis.

8. The crushing method according to claim 7, characterized in that: The electrolytic hydrogen charging conditions are: a platinum electrode is used as the positive electrode, an alloy block is used as the negative electrode, and a 30% by mass sodium chloride solution is used as the electrolyte.

9. The crushing method according to claim 8, characterized in that: The electrolysis voltage is 4-6V, and the current density is 400-500mA / cm 2 .

10. The nickel-based rare earth master alloy block obtained by crushing according to the method of any one of claims 1 to 9.

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