CN110079691B - Molybdenum-copper alloy with low molybdenum content and preparation method thereof - Google Patents
Molybdenum-copper alloy with low molybdenum content and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a molybdenum-copper alloy with low molybdenum content and a preparation method thereof. The preparation method of the molybdenum-copper alloy with low molybdenum content comprises the following steps: molybdenum powder treatment: carrying out airflow crushing on molybdenum powder to obtain agglomeration-free molybdenum powder; spray granulation, namely adding water and a binder into the agglomeration-free molybdenum powder and the copper powder, stirring to obtain uniform slurry, and preparing the uniform slurry into spherical molybdenum-copper powder by adopting a spray granulation method; an automatic pressing step: carrying out automatic pressing molding on the spherical molybdenum-copper powder to obtain a pressed compact; rubber discharging: removing the binder in the green compact to obtain a blank; sintering: and sintering the blank to obtain the molybdenum-copper alloy. The method has the effects of high efficiency, high compactness, uniform tissue, good consistency, high yield and the like.
Description
Technical Field
The invention relates to a refractory metal powder metallurgy technology, in particular to a molybdenum-copper alloy with low molybdenum content and a preparation method thereof.
Background
Mo-Cu composites are "pseudoalloys" composed of high strength, low coefficient of thermal expansion molybdenum and high electrical and thermal conductivity copper. Although the Mo/Cu alloy has lower thermal conductivity and density compared with the W/Cu alloy, the Mo has lower melting point and hardness than the W, so that the molybdenum-copper composite material is easier to sinter and process, and therefore, the molybdenum-copper material has wider application.
The mixed powder sintering method is the most common method for preparing molybdenum-copper composite materials. The sintering process of the molybdenum-copper material is very similar to that of the tungsten-copper material, molybdenum powder and copper powder are mixed according to a proportion, pressed and sintered into a Mo/Cu blank, and different sintering temperatures can be adopted according to different proportions of the molybdenum and the copper, wherein the sintering temperature is generally 1300-1500 ℃. For the molybdenum-copper material with low molybdenum content, the powder can be mixed by adopting a mechanical alloying method, the used material is high-energy ball milling powder, and the molybdenum-copper alloy with high density, metastable phase, quasicrystal and enlarged intersolubility can be obtained.
However, due to the characteristics of high viscosity, complex microscopic shape and the like of the molybdenum-copper powder, the molybdenum-copper powder is difficult to be completely and uniformly mixed, so that agglomeration occurs inside the sintered molybdenum-copper alloy. And the molybdenum-copper powder has poor compression molding property, and the pressure distribution is not uniform in the compression molding process, so that the alloy components are segregated after sintering. And the mixed powder sintering method consumes labor and time, has high sintering temperature, and the obtained molybdenum-copper alloy has the defects of agglomeration, holes, segregation and the like easily.
Disclosure of Invention
Aiming at the defects and defects of the prior art, the invention aims to provide a preparation method of a molybdenum-copper alloy with low molybdenum content, which overcomes the defects of high cost, low efficiency and large product quality fluctuation of the existing preparation method.
The invention also aims to provide the molybdenum-copper alloy with low molybdenum content, which has uniform structure, high compactness and good performance consistency, and solves the problems that the conventional molybdenum-copper alloy with low molybdenum content has non-uniform structure and difficult performance guarantee.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a preparation method of a molybdenum-copper alloy with low molybdenum content comprises the following steps:
molybdenum powder treatment: carrying out airflow crushing on molybdenum powder to obtain agglomeration-free molybdenum powder;
spray granulation, namely adding water and a binder into the agglomeration-free molybdenum powder and the copper powder, stirring to obtain uniform slurry (which is more uniform than the slurry obtained by the traditional dry mixing), and preparing the uniform slurry into spherical molybdenum-copper powder by adopting a spray granulation method;
an automatic pressing step: carrying out automatic pressing molding on the spherical molybdenum-copper powder to obtain a pressed compact;
rubber discharging: removing the binder in the green compact to obtain a blank;
sintering: and sintering the blank to obtain the molybdenum-copper alloy.
In the method for preparing the molybdenum-copper alloy with low molybdenum content, as a preferred embodiment, in the molybdenum powder treatment step, the Freund's particle size of the molybdenum powder is 3.0-4.0 μm, and the apparent density is 1.0-1.3 g/cm3. The molybdenum powder used in the invention can ensure the compactness of the material and the performance of the prepared product, and has proper price.
In the method for preparing the molybdenum-copper alloy with low molybdenum content, as a preferred embodiment, in the spray granulation step, the Freund's particle size of the copper powder is 3.0-4.0 μm, and the apparent density is 2.0-3.0 g/cm3The Ferris particle size of the molybdenum powder and the copper powder can ensure that the molybdenum powder and the copper powder are mixed more easily and uniformly; preferably, the non-agglomerated molybdenum powder: the mass ratio of the copper powder is 1: 9-1: 1, the adding amount of the water is 10% -30% of the total mass of the agglomeration-free molybdenum powder and the copper powder, if the adding amount of the water is too much, the drying is insufficient in the spray granulation process, and if the adding amount of the water is too little, the bottom deposition is caused in the stirring process, so that a pipeline and a nozzle are blocked in the spray granulation process, and the granulation fails due to insufficient tension in the granulation process; the addition amount of the binder is 1-3% of the total mass of the agglomeration-free molybdenum powder and the copper powder.
In the above-mentioned method for producing a molybdenum-copper alloy having a low molybdenum content, as a preferred embodiment, in the spray granulation step, the diameter of a nozzle used in the spray granulation method is 0.8mm to 1.1mm, and the pressure applied to the uniform slurry is 900KPa to 1200KPa, wherein if the pressure is too high, the throughput of the slurry is increased, resulting in insufficient drying, and further, the slurry is stuck to the top of a spray tower; too low a pressure can result in nozzle plugging and low pressures can result in low slurry throughput and corresponding lower throughput; the drying temperature is 150-180 ℃, and the diameter of the spherical molybdenum-copper powder is 50-200 μm; the invention adopts a nozzle with large diameter and small pressure, can prevent the nozzle from being blocked, and the sprayed fog drops are large, so that the diameter of the obtained spherical powder is large.
In the above method for producing a molybdenum-copper alloy with a low molybdenum content, as a preferred embodiment, in the automatic pressing step, the automatic pressing is performed using a fully automatic molding press; preferably, the pressure of the automatic pressing is 50 to 80 tons, and the frequency is 10 to 20 Hz; when the pressure of the automatic pressing is 50 tons to 60 tons, the adopted full-automatic molding press is a 0PC-60TG type full-automatic powder press manufactured by Nanjing Dongtian precision machinery Co Ltd; when the pressure of the automatic pressing is 60-80 tons, the structure of the used full-automatic molding press is the improvement of the full-automatic powder pressing machine of the 0PC-60TG model, and the maximum pressure which can be provided by the full-automatic molding press is 80 tons.
In the above method for preparing a low molybdenum content molybdenum-copper alloy, as a preferred embodiment, in the step of binder removal, the step of binder removal (binder removal) is performed in a pusher furnace, preferably, the atmosphere in the pusher furnace is hydrogen, wherein the reducing atmosphere provided by hydrogen can ensure that molybdenum-copper is not oxidized, and if vacuum and nitrogen are used, the cost is increased, and the effect of preventing oxidation is not as good as that of hydrogen of the present invention; the temperature of the pusher furnace is 500-700 ℃ (for example, 520 ℃, 540 ℃, 560 ℃, 580 ℃, 600 ℃, 620 ℃, 640 ℃, 660 ℃ and 680 ℃), the speed is 5 Hz-10 Hz, the glue discharging time is 2-4 hours (for example, 2.5 hours, 3 hours and 3.5 hours, the glue discharging time is 500-700 ℃), if the temperature of the pusher furnace is too low, the glue (namely the binder) is not easy to volatilize, and if the temperature is too high, the energy is wasted; if the speed of the boat pushing furnace is too high, the glue discharging is not thorough, and if the speed is too low, the cost is increased.
In the above method for producing a molybdenum-copper alloy having a low molybdenum content, as a preferred embodiment, in the sintering step, the sintering treatment is performed in a pusher furnace in which an atmosphere is hydrogen, the pusher furnace has a temperature of 950 to 1050 ℃ (e.g., 980 ℃, 1000 ℃, 1020 ℃, 1040 ℃), a speed of 20 to 30Hz, and the sintering time is 40 to 1 hour (e.g., 45, 50, 55 minutes, the sintering time is 950 to 1050 ℃). Wherein, if the temperature of the boat pushing furnace, namely the temperature for sintering, is too high, liquid phase can appear, the density of the material can be reduced by the liquid phase sintering, and the energy waste can be caused by the high temperature; if the sintering temperature is low, the sintering driving force is insufficient, so that the material is not firmly combined and the performance is poor; if the speed of the boat pushing furnace is too high, the sintering is incomplete, the combination is not tight, the density is low and the product performance is poor; too low a speed will reduce efficiency, waste energy, and also cause crystal growth and poor product performance.
The molybdenum-copper alloy with the low molybdenum content is prepared by the preparation method of the molybdenum-copper alloy with the low molybdenum content.
Compared with the prior art, the invention has the following positive effects:
(1) the invention discloses a preparation method of a molybdenum-copper alloy with low molybdenum content.
(2) The invention uses a spray granulation method to obtain molybdenum-copper mixed powder. Firstly, the molybdenum-copper powder is mixed with water, so that the friction force between the two powders is reduced, and the molybdenum powder and the copper powder can be mixed more uniformly. Then, the spherical powder obtained by using the spray granulation method has good fluidity, can be used in an automatic molding press, and improves the production efficiency and the consistency of alloy performance. Finally, the spherical molybdenum-copper mixed powder obtained by the spray granulation method has good compression molding performance, and the condition of uneven pressure distribution can not occur even if an automatic molding press is used for carrying out large unidirectional pressure compression, thereby avoiding composition segregation.
(3) According to the invention, the molybdenum-copper green compacts are pressed by using the automatic forming press, so that the production efficiency and the product performance consistency are improved. The automatic forming press can provide larger pressure to obtain pressed compact with higher density, and higher surface potential energy exists among powder particles, so that the sintering temperature is reduced, and the sintering time is shortened.
(4) The invention has a glue discharging process, and has the effect of removing impurities in alloy while removing the colloid in the pressed compact, thereby avoiding the defects of air holes, uneven structure and the like caused by the impurities during direct sintering.
(5) The invention uses the push boat furnace for infiltration, automatically moves the boat, has good alloy performance consistency, low sintering temperature and short used time, and improves the production efficiency.
(6) The method fully considers the defects of air holes, agglomeration, uneven structure and the like possibly existing in the molybdenum-copper alloy with low molybdenum content, and can prepare the molybdenum-copper alloy with uniform structure and high density and low molybdenum content.
(7) The invention overcomes the defects of low efficiency, complex production process, large product quality fluctuation and the like of the existing preparation process, improves the production efficiency by adopting the method explained by the invention, and has good consistency of the performance of the molybdenum-copper alloy produced by the method and high yield.
Drawings
For a more clear description of the invention, reference is made herein to the accompanying drawings, which form a further part hereof. Wherein:
fig. 1 is a metallographic photograph of the molybdenum-copper alloy prepared in example 1 after surface polishing, in which molybdenum is present in bright areas and copper is present in the rest.
Detailed Description
In order to highlight the objects, technical solutions and advantages of the present invention, the present invention is further illustrated by the following examples, which are illustrative of the present invention and not limiting.
Example 1 preparation of a Mo50Cu50 alloy, comprising the steps of:
1. molybdenum powder treatment
Prepared such that the Fisher's particle size is 4.0 μm and the apparent density is 1.3g/cm3And crushing the molybdenum powder by using an airflow crusher to obtain the agglomeration-free molybdenum powder.
2. Spray granulation
Taking a Fei-Shi particle size of 4.0 μm and a bulk density of 3.0g/cm3The ultrafine copper powder is mixed with the agglomeration-free molybdenum powder obtained in the step 1, water and PEG20000 binder to form slurry. Wherein: agglomeration-free molybdenum powder: the mass ratio of the copper powder is 1:1, and the addition amount of water is 25 percent of the total mass of the agglomeration-free molybdenum powder and the copper powder; binderThe addition amount is 3 percent of the total mass of the agglomeration-free molybdenum powder and the copper powder. And (3) carrying out spray drying granulation on the slurry in a nitrogen protective atmosphere, wherein the diameter of a nozzle used for spray granulation is 1.1mm, the pressure of the slurry is 1200KPa, the drying temperature is 180 ℃, and spherical molybdenum copper powder with the diameter of 150-200 mu m is obtained after drying.
3. Press forming
Pressing the spherical molybdenum copper powder prepared in the step 3 by using an automatic pressing machine, wherein the pressure of the automatic pressing machine is 50 tons, and the speed is 20Hz to obtain a pressed compact; wherein, the automatic molding press is a full-automatic powder press with a model number of 0PC-60TG produced by Nanjing Dongtian precision machinery Limited, and the molding process of the automatic molding press specifically comprises the following steps: 1 adding spherical molybdenum-copper powder into a feeding bin; 2, the spherical molybdenum copper powder in the feeding bin flows into a die through a pipeline under the action of gravity; 3, pressing by a machine (an automatic molding press) according to the set speed and pressure, wherein 20 pieces of the product are pressed every minute (the pressurization time of each single piece is 1s, the pressure maintaining time is 1s, the pressure relief and unloading time (the unloading time is the time in the automatic demolding process) is 1s), and the pressure is 50 t; 4, automatically demoulding; 5 circulation 2-4 process.
4. Blank discharging
And (3) putting the pressed blank prepared in the step (3) into a pusher furnace to discharge the glue, wherein the atmosphere is hydrogen, the temperature is 700 ℃, the speed is 5Hz, and the glue discharging time is 4 hours, so that a blank is obtained.
5. Sintering
And (3) putting the blank into a pusher furnace for sintering, wherein the atmosphere is hydrogen, the temperature is 1050 ℃, the speed is 20Hz, and the sintering time is 1 hour.
FIG. 1 is a metallographic photograph of a Mo50Cu50 alloy produced by the method after surface polishing, wherein bright parts are molybdenum and dark parts are copper. According to the metallographic phase, the Mo50Cu50 alloy produced by the method has no closed pores, no agglomeration and no tissue unevenness.
The Mo50Cu50 alloy with phi 15 x 8mm is produced by the method, the yield per week can reach 600kg, the density can reach 99%, 5 finished products are sampled and inspected, and the results are shown in the following table 1:
TABLE 1
| Numbering | Diameter/mm | Height/mm | Density/g cm-3 |
| 1 | 15.00 | 8.00 | 9.54 |
| 2 | 15.00 | 8.00 | 9.54 |
| 3 | 14.99 | 8.02 | 9.53 |
| 4 | 15.00 | 8.00 | 9.54 |
| 5 | 15.01 | 8.00 | 9.54 |
As can be seen from the results in Table 1, the Mo-Cu alloy of the present invention has the advantages of high efficiency, high compactness, uniform structure, good consistency, high yield, etc.
Example 2 preparation of Mo30Cu70 alloy
1. Molybdenum powder treatment
Prepared with a Fisher-size of 3.5 μm and a bulk density of 1.2g/cm3And crushing the molybdenum powder by using an airflow crusher to obtain the agglomeration-free molybdenum powder.
2. Spray granulation
Taking a Fei-Shi particle size of 3.5 μm and a bulk density of 2.5g/cm3The superfine copper powder is mixed with the agglomeration-free molybdenum powder obtained in the step 1, water and PEG20000 binding agent to form slurry. Wherein: agglomeration-free molybdenum powder: the mass ratio of the copper powder is 3:7, and the addition amount of water is 20% of the total mass of the agglomeration-free molybdenum powder and the copper powder; the addition amount of the binder is 2 percent of the total mass of the agglomeration-free molybdenum powder and the copper powder. And (3) carrying out spray drying granulation on the slurry in a nitrogen protective atmosphere, wherein the diameter of a nozzle used for spray granulation is 0.96mm, the pressure of the slurry is 1050KPa, the drying temperature is 165 ℃, and drying is carried out to obtain the spherical molybdenum copper powder with the diameter of 100-150 mu m.
3. Press forming
Pressing the spherical molybdenum copper powder prepared in the step 3 by using an automatic pressing machine, wherein the pressure of the automatic pressing machine is 65 tons, and the speed is 15Hz, so as to obtain a pressed compact; the automatic molding press is a modification of a 0PC-60TG model full-automatic powder press manufactured by Nanjing Dongtian precision machinery Co., Ltd, and can provide 65t of pressure.
The specific process of pressing by using an automatic molding press comprises the following steps: 1 adding spherical molybdenum-copper powder into a feeding bin; 2, the spherical molybdenum copper powder in the feeding bin flows into a die through a pipeline under the action of gravity; 3, pressing by a machine (an automatic molding press) according to the set speed and pressure, wherein 15 pieces are pressed per minute, the pressure is 65t (the pressurization time of each single piece is 1.5s, the pressure maintaining time is 1.5s, and the pressure relief and unloading time (the unloading time is the time in the automatic demolding process) is 1 s); 4, automatically demoulding; 5 circulation 2-4 process.
4. Blank discharging
And (3) putting the pressed blank prepared in the step (3) into a pusher furnace to discharge the glue, wherein the atmosphere is hydrogen, the temperature is 600 ℃, the speed is 7Hz, and the glue discharging time is 3 hours, so that a blank is obtained.
5. Sintering
And (3) putting the blank into a push boat furnace for sintering, wherein the atmosphere is hydrogen, the temperature is 1000 ℃, the speed is 25Hz, and the sintering time is 50 min.
The density of the Mo30Cu70 alloy with phi 15 x 8mm produced by the method can reach 99%, 5 finished products are sampled and inspected, the diameter range is 15.00 +/-0.01 mm, the height range is 8.00 +/-0.02 mm, and the density can reach 9.25g/cm3
Example 3 preparation of Mo10Cu90 alloy
1. Molybdenum powder treatment
Prepared with a Fisher-size of 3.0 μm and a bulk density of 1.0g/cm3And crushing the molybdenum powder by using an airflow crusher to obtain the agglomeration-free molybdenum powder.
2. Spray granulation
Taking a Fei-Shi particle size of 3.0 μm and a bulk density of 2.0g/cm3The superfine copper powder is mixed with the agglomeration-free molybdenum powder obtained in the step 1, water and a binder to form slurry. Wherein: agglomeration-free molybdenum powder: the mass ratio of the copper powder is 1:9, and the addition amount of water is 15% of the total mass of the agglomeration-free molybdenum powder and the copper powder; the addition amount of the binder is 1 percent of the total mass of the agglomeration-free molybdenum powder and the copper powder. And (3) carrying out spray drying granulation on the slurry in a nitrogen protective atmosphere, wherein the diameter of a nozzle used for spray granulation is 0.8mm, the pressure of the slurry is 1200KPa, the drying temperature is 150 ℃, and drying is carried out to obtain spherical molybdenum copper powder with the diameter of 50-100 microns.
3. Press forming
Pressing the spherical molybdenum copper powder prepared in the step 3 by using an automatic pressing machine, wherein the pressure of the automatic pressing machine is 80 tons, and the speed is 10Hz to obtain a pressed compact; the automatic molding press is a modification of a 0PC-60TG model full-automatic powder press manufactured by Nanjing Dongtian precision machinery Co., Ltd, and can provide 80t of pressure.
The specific process of pressing by using an automatic molding press comprises the following steps: 1 adding spherical molybdenum-copper powder into a feeding bin; 2, the spherical molybdenum copper powder in the feeding bin flows into a die through a pipeline under the action of gravity; 3, pressing by a machine (an automatic molding press) according to the set speed and pressure, wherein 15 pieces are pressed every minute, the pressure is 65t (the pressurization time of each single piece is 2.5s, the pressure maintaining time is 2.5s, and the pressure relief and unloading time (the unloading time is the time in the automatic demolding process) is 1 s); 4, automatically demoulding; 5 circulation 2-4 process.
4. Blank discharging
And (3) putting the pressed blank prepared in the step (3) into a pusher furnace to discharge the glue, wherein the atmosphere is hydrogen, the temperature is 500 ℃, the speed is 10Hz, and the glue discharging time is 2 hours, so that a blank is obtained.
5. Sintering
And (3) putting the blank into a pusher furnace for sintering, wherein the atmosphere is hydrogen, the temperature is 950 ℃, the speed is 30Hz, and the sintering time is 45 min.
The density of the Mo10Cu90 alloy with phi 15 x 8mm produced by the method can reach 99%, 5 finished products are sampled and inspected, the diameter range is 15.00 +/-0.01 mm, the height range is 8.00 +/-0.02 mm, and the density can reach 8.99g/cm3。
Comparative example 1 phi 15 x 8mm Mo50Cu50 prepared by a prior process
The existing preparation method of Mo50Cu50 comprises the following steps: 1 weighing molybdenum powder and copper powder, and batching in a mixer (dry mixing in a V-shaped mixer for 12 hours); 2, mixing glue (glycerol alcohol (the volume ratio of the glycerol alcohol to the glycerol alcohol is 2: 5)) and stirring uniformly; 3, molding by steel die pressing (stainless steel die pressing) at the pressure of 10t-12 t; 4, degumming, wherein the degumming temperature is 700 ℃ and the degumming time is 4 hours; and 5, pre-burning, specifically: keeping the temperature at 960 ℃ for 1 hour; 6, sintering, specifically: incubate at 1080 ℃ for 3 hours. The Mo50Cu50 produced by the existing Mo50Cu50 method has the compactness of about 98%.
Comparing inventive example 1 with comparative example 1, the comparison results are shown in table 2 below:
TABLE 2
From the comparison of example 1 (inventive process) with comparative example 1 (prior art process) in table 1 above, it can be seen that: the method has the effects of high efficiency, high compactness, uniform tissue, good consistency, high yield and the like; compared with the prior art, the method has the following advantages that the method can still obtain the material with high density even if the sintering temperature is low and the sintering time is short in the production process: 1, crushing molybdenum powder through airflow to ensure that the powder is not agglomerated; 2, mixing materials by adding water into slurry, and compared with dry mixing, the mixing materials are easier to be mixed uniformly, especially copper powder which is easy to be bonded and agglomerated; 3 the spherical powder prepared by spray granulation has good pressing formability, the powder with the same material and the same pressure is easier to compact, and the higher pressure is used for ensuring the high stress of the powder in the pressed compact, so that the sintering can be finished at lower temperature in a shorter time, and the compactness can reach 99%.
Claims (11)
1. A preparation method of a molybdenum-copper alloy with low molybdenum content is characterized by comprising the following steps:
molybdenum powder treatment: carrying out airflow crushing on molybdenum powder to obtain agglomeration-free molybdenum powder;
spray granulation, namely adding water and a binder into the agglomeration-free molybdenum powder and the copper powder, stirring to obtain uniform slurry, and preparing the uniform slurry into spherical molybdenum-copper powder by adopting a spray granulation method;
an automatic pressing step: carrying out automatic pressing molding on the spherical molybdenum-copper powder to obtain a pressed compact; wherein the pressure of the automatic pressing is 50-80 tons;
rubber discharging: removing the binder in the green compact to obtain a blank;
sintering: and sintering the blank to obtain the molybdenum-copper alloy, wherein the sintering is carried out in a push boat furnace, and the temperature of the push boat furnace is 950-1050 ℃.
2. The method for preparing molybdenum-copper alloy with low molybdenum content according to claim 1, wherein in the molybdenum powder treatment step, before the gas stream is crushed, the molybdenum powder has a Fisher size of 3.0 to 4.0 μm and a bulk density of 1.0 to 1.3g/cm3。
3. The method of claim 1, wherein the molybdenum-copper alloy is prepared by a method comprisingIn the spray granulation step, the Fisher size of the copper powder is 3.0-4.0 mu m, and the apparent density is 2.0-3.0 g/cm3。
4. The method for preparing the molybdenum-copper alloy with low molybdenum content according to claim 1, wherein in the step of spray granulation, the agglomeration-free molybdenum powder: the mass ratio of copper powder is 1: 9-1: 1, the addition amount of water is 10% -30% of the total mass of the agglomeration-free molybdenum powder and the copper powder, and the addition amount of the binder is 1% -3% of the total mass of the agglomeration-free molybdenum powder and the copper powder.
5. The method for preparing the molybdenum-copper alloy with low molybdenum content according to claim 1, wherein in the spray granulation step, the diameter of a nozzle used in the spray granulation method is 0.8mm to 1.1mm, the pressure of the uniform slurry is 900kPa to 1200kPa, the drying temperature is 150 ℃ to 180 ℃, and the diameter of the spherical molybdenum-copper powder is 50 μm to 200 μm.
6. The method for preparing the molybdenum-copper alloy with low molybdenum content according to claim 1, wherein in the automatic pressing step, the automatic pressing is performed by using a fully automatic molding press.
7. The method for preparing the molybdenum-copper alloy with low molybdenum content according to claim 1, wherein in the automatic pressing step, the frequency of the automatic pressing is 10 to 20 Hz.
8. The method for preparing the molybdenum-copper alloy with low molybdenum content according to claim 1, wherein in the step of discharging the glue, the step of discharging the glue is carried out in a pusher furnace.
9. The method for preparing the molybdenum-copper alloy with low molybdenum content according to claim 1, wherein in the step of discharging the glue, the atmosphere in the pusher furnace is hydrogen, the temperature of the pusher furnace is 500-700 ℃, the speed is 5-10 Hz, and the glue discharging time is 2-4 hours.
10. The method for preparing the molybdenum-copper alloy with low molybdenum content according to claim 1, wherein in the sintering step, the atmosphere in the pusher furnace is hydrogen, the speed of the pusher furnace is 20 Hz-30 Hz, and the sintering time is 40 minutes-1 hour.
11. A molybdenum-copper alloy with a low molybdenum content, which is prepared by the method for preparing the molybdenum-copper alloy with a low molybdenum content according to any one of claims 1 to 10.
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| CN112705715B (en) * | 2020-11-23 | 2022-06-28 | 浙江大学 | Method for preparing Mo-Cu mixed powder by spray drying granulation |
| CN115488330B (en) * | 2021-06-02 | 2024-05-10 | 华晴材料股份有限公司 | Method for producing copper particles and copper particles |
| CN113385679B (en) * | 2021-06-17 | 2023-06-02 | 安徽寒锐新材料有限公司 | Method for preparing cobalt powder with high apparent density |
| CN117758104B (en) * | 2023-12-28 | 2024-10-11 | 余姚市爱迪升电镀科技有限公司 | Copper-molybdenum alloy wire for electronic device, manganese plating process and manganese plating solution thereof |
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