NL2029725B1 - Method for preparing high-entropy alloy - Google Patents

Method for preparing high-entropy alloy Download PDF

Info

Publication number
NL2029725B1
NL2029725B1 NL2029725A NL2029725A NL2029725B1 NL 2029725 B1 NL2029725 B1 NL 2029725B1 NL 2029725 A NL2029725 A NL 2029725A NL 2029725 A NL2029725 A NL 2029725A NL 2029725 B1 NL2029725 B1 NL 2029725B1
Authority
NL
Netherlands
Prior art keywords
sheet
titanium
tantalum
zirconium
minutes
Prior art date
Application number
NL2029725A
Other languages
Dutch (nl)
Other versions
NL2029725A (en
Inventor
He Yuan
Guo Lei
Pan Xuchao
Jiao Junjie
He Yong
Fang Zhong
Wang Chuanting
Original Assignee
Univ Nanjing Sci & Tech
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Nanjing Sci & Tech filed Critical Univ Nanjing Sci & Tech
Priority to NL2029725A priority Critical patent/NL2029725B1/en
Publication of NL2029725A publication Critical patent/NL2029725A/en
Application granted granted Critical
Publication of NL2029725B1 publication Critical patent/NL2029725B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The present disclosure discloses a method for preparing a molybdenum—tungsten—tantalum—titanium—zirconium high—entropy alloy, comprising the steps of: weighing a high—purity tungsten powder, a molybdenum block, a tantalum block, a titanium block, and a zirconium block according to the stoichiometric proportion of alloy elements; mixing the tungsten powder and the tantalum block evenly and mixing the titanium block and the zirconium block uniformly and placing the molybdenum block separately; reducing the power step by step and smelting the raw materials in batches by using a vacuum suspension melting furnace, and then performing alloy refining, cooling, and repeated smelting, to obtain a molybdenum—tungsten—tantalum—titanium—zirconium high—entropy alloy. The method makes full use of the suspension smelting technology, and the prepared molybdenum—tungsten—tantalum— titanium—zirconium high—entropy alloy has uniform structure, high purity, excellent mechanical properties and large size. The preparation process is simple, easy to form, and efficient, and is suitable for industrial production of molybdenum—tungsten— tantalum—titanium—zirconium high—entropy alloys.

Description

P790/NLpd METHOD FOR PREPARING HIGH-ENTROPY ALLOY
TECHNICAL FIELD The present disclosure relates to the field of high-entropy alloys, and more particularly to a method for preparing a high- entropy alloy.
BACKGROUND ART Traditional alloy mainly comprises one or two elements as main components, and the mechanical property of the alloy is im- proved by adding a small amount of other elements. High-entropy alloy generally comprises multiple main elements, and the atomic percent of each component is 5-35%. The high-entropy alloy is sim- ple in structure due to high mixed entropy effect, so that the high-entropy alloy has multiple unique characteristics compared with the traditional alloy. Molybdenum-tungsten-tantalum-titanium- zirconium high-entropy alloys have wide application prospects in multiple fields such as aerospace, military and industry and has great development potential due to its good mechanical property, high strength, fatigue resistance, good conductivity, high temper- ature resistance, etc. Therefore, selecting a reasonable prepara- tion method of a high-entropy alloy material is of great signifi- cance to the material application, and particularly to the prepa- ration of large-size cast ingots with uniform structures.
At present, the high-entropy alloy material is often prepared by adopting powder metallurgy technology and energy beam melting technologies such as electron beams and electric arcs in China.
When the high-entropy alloy is prepared by adopting the powder metallurgy technology, due to the process limitation, the prepared material is low in structure uniformity and high in impurity con- tent and easily has obvious defects. The energy beam melting tech- nologies used for preparing the high-entropy alloy are often used for preparing small and medium-sized cast ingots, which are diffi- cult to achieve high uniformity. Therefore, a better preparation method is needed at present, which can not only fully melt the high melting point components of the high-entropy alloy, but also prepare a large-size ingot with uniform structure.
SUMMARY Aiming at the defects in the prior art, the present disclo- sure provides a method for preparing a high-entropy alloy, to sovle the problems of high impurity content, large coarse grain, non-uniform structure of high-entropy alloys during the prepara- tion. The molybdenum-tungsten-tantalum-titanium-zirconium high- entropy alloy prepared by the method is uniform in structure and excellent in mechanical property.
In order to achieve the object, the present disclosure pro- vides the following technical solution: a method for preparing a high-entropy alloy, comprising the following steps: Step 1, preparing materials: removing oxide skin layers of a molybdenum sheet, a tantalum sheet, a titanium sheet and a zirco- nium sheet, and cleaning by using an ultrasonic cleaning machine; and uniformly mixing tungsten powder with a size of 100-300 meshes and a pure tantalum sheet, and uniformly mixing a pure titanium sheet and a pure zirconium sheet, wherein the atom molar ratio of the raw materials is that Mo: W: Ta: Ti: Zr = 1: 1: 1: 1: 1.
Step 2, vacuumizing a vacuum suspension smelting furnace: vacuumizing until the low vacuum is to 100-110 Pa, and vacuumizing until the high vacuum is below 1x10" Pa.
Step 3, filling protective gas into the vacuum suspension smelting furnace: filling high-purity argon into the vacuum sus- pension smelting furnace to 450-750 Pa.
Step 4, gradually reducing power and smelting raw materials in batches: firstly, increasing the heating power to 120-130 kW and maintaining for 2-3 minutes; secondly, increasing the heating power to 210-220 kW and maintaining for 2-3 minutes; thirdly, in- creasing the heating power to 300-310 kW and maintaining for 2-3 minutes; finally, increasing the heating power to 350 kW; and keeping the power unchanged, continuously heating to fully melt the pure tungsten powder and the pure tantalum sheet, maintaining the temperature at 3,050-3,250 °C and heating for 5-10 minutes.
Reducing the heating power to 280-300 kW, gradually adding the pure molybdenum sheet into the melt through a feeder, fully melting, maintaining the temperature at 2,650-3,000 °C and heating for 3-5 minutes.
Reducing the heating power to 180-210 kW, gradually adding the zirconium sheet and the titanium sheet into the melt through the feeder, continuously heating to fully melt the uniform mixture of the zirconium sheet and the titanium sheet, maintaining the temperature at 1,600-1,850 °C and heating for 3-5 minutes.
Step 5, refining the alloy: increasing the heating power to 280-300 kW and continuously heating for 8-10 minutes.
Step 6, cooling the alloy: gradually reducing the power of the power supply by taking every 40-60 kW as a step, cooling to below 60 °C along with the furnace to obtain an ingot. And Step 7, repeatedly smelting the alloy ingot: in order to ob- tain an alloy ingot with uniform structure and high purity, heat- ing and smelting the cast ingot again; firstly, increasing the heating power to 75-85 kW and maintaining for 1-2 minutes; second- ly, increasing the heating power to 130-150 kW and maintaining for 1-2 minutes; finally, increasing the heating power to 170-210 kW, maintaining the temperature at 1500-1850 °C and heating for 10-15 minutes; cooling the alloy to obtain the alloy ingot again; and repeatedly smelting for more than 3 times to obtain a molybdenum- tungsten-tantalum-titanium-zirconium high-entropy alloy with uni- form structure.
Further, the molybdenum sheet, the tungsten powder, the tan- talum sheet, the titanium sheet and the zirconium sheet in the step 1 have a purity higher than 99.99%wt%.
Compared with the prior art, the method has the following re- markable advantages: (1) The molybdenum-tungsten-tantalum-titanium-zirconium high-entropy alloy prepared through the method is uniform in structure and can achieve uniformity of the submicron scale and even the nanoscale.
(2) The molybdenum-tungsten-tantalum-titanium-zirconium high-entropy alloy prepared through the method has excellent me- chanical performance, high strength, corrosion resistance, abra-
sion resistance and oxidation resistance; (3) The molybdenum-tungsten-tantalum-titanium-zirconium high-entropy alloy prepared through the method is large in size and high in purity, impurities and defects are controlled on the surface layer of the ingot, the material utilization rate is high, and machining is facilitated. And (4) The method is simple in process, high in speed and effi- ciency and capable of facilitating batch production.
BRIEF DESCRIPTION OF THE DRAWINGS FIG.1 is a flow chart of a method for preparing a molyb- denum-tungsten-tantalum-titanium-zirconium high-entropy alloy in the present disclosure.
DETAILED DESCRIPTION OF THE EMBODIMENTS The present disclosure is further described in detail in con- Junction with the accompanying drawings.
Referring to FIG.1, a method for preparing a high-entropy al- loy; comprising the following steps: Step 1, preparing materials: removing oxide skin layers of a molybdenum sheet, a tantalum sheet, a titanium sheet and a zirco- nium sheet, and cleaning by using an ultrasonic cleaning machine; and uniformly mixing tungsten powder with a size of 100-300 meshes and a pure tantalum sheet, and uniformly mixing a pure titanium sheet and a pure zirconium sheet, wherein the atom molar ratio of the raw materials is that Mo: W: Ta: Ti: Zr = 1: 1: 1: 1: 1.
Step 2, vacuumizing a vacuum suspension smelting furnace: vacuumizing until the low vacuum is to 100-110 Pa, and vacuumizing until the high vacuum is below 1210? Pa.
Step 3, filling protective gas into the vacuum suspension smelting furnace: filling high-purity argon into the vacuum sus- pension smelting furnace to 450-750 Pa.
Step 4, gradually reducing power and smelting raw materials in batches: firstly, increasing the heating power to 120-130 kW and maintaining for 2-3 minutes; secondly, increasing the heating power to 210-220 kW and maintaining for 2-3 minutes; thirdly, in- creasing the heating power to 300-310 kW and maintaining for 2-3 minutes; finally, increasing the heating power to 350 kW; and keeping the power unchanged, continuously heating to fully melt the pure tungsten powder and the pure tantalum sheet, maintaining the temperature at 3,050-3,250 °C and heating for 5-10 minutes.
5 Reducing the heating power to 280-300 kW, gradually adding the pure molybdenum sheet into the melt through a feeder, fully melting, maintaining the temperature at 2,650-3,000 °C and heating for 3-5 minutes.
Reducing the heating power to 180-210 kW, gradually adding the zirconium sheet and the titanium sheet into the melt through the feeder, continucusly heating to fully melt the uniform mixture of the zirconium sheet and the titanium sheet, maintaining the temperature at 1,600-1,850 °C and heating for 3-5 minutes.
Step 5, refining the alloy: increasing the heating power to 280-300 kW and continuously heating for 8-10 minutes.
Step 6, cooling the alloy: gradually reducing the power of the power supply by taking every 40-60 kW as a step, cooling to below 60 °C along with the furnace to obtain an ingot.
Step 7, repeatedly smelting the alloy ingot: in order to ob- tain an alloy ingot with uniform structure and high purity, heat- ing and smelting the cast ingot again; firstly, increasing the heating power to 75-85 kW and maintaining for 1-2 minutes; second- ly, increasing the heating power to 130-150 kW and maintaining for 1-2 minutes; finally, increasing the heating power to 170-210 kW, maintaining the temperature at 1,500-1,850 °C and heating for 10-15 minutes; cooling the alloy to obtain an alloy ingot again; and re- peatedly smelting for more than 3 times to obtain a molybdenum- tungsten-tantalum-titanium-zirconium high-entropy alloy with uni- form structure.
The method for preparing a molybdenum-tungsten-tantalum- titanium-zirconium high-entropy alloy according to claim 1, where- in the molybdenum sheet, the tungsten powder, the tantalum sheet, the titanium sheet and the zirconium sheet in the step 1 have a purity higher than 99. 99wts.
Example 1: Step 1, preparing materials: taking the molybdenum sheet, the tungsten powder, the tantalum sheet, the titanium sheet and the zirconium sheet with a purity of 99.99% as raw materials, grinding oxide skin layers on the surfaces of flaky raw materials by using a file or a grinding wheel, adding absolute ethanol to wash and dry the flaky raw materials by using an ultrasonic cleaning ma- chine, calculating the mass ratio of each component according to an equimolar ratio, with total mass of 2.5 Kg, and batching ac- cording to the mass percentage (wt®%) of 15.99% of Mo, 30.65% of W,
30.17% of Ta, 7.98% of Ti and 15.21% of Zr; and fully and uniform- ly mixing the tungsten powder with the size of 300 meshes and the tantalum sheet, placing the mixture into a crucible with the diam- eter of 60 mm of a suspension smelting furnace, placing the molyb- denum sheet into a feeder, and placing the uniformly mixed zirco- nium sheet and titanium sheet into the feeder; Step 2, vacuumizing the vacuum suspension smelting furnace: Opening a mechanical pump, opening a rough vacuumizing valve, opening a roots pump when vacuumizing to 350 Pa, and continuously vacuumizing to 100 Pa.
Opening a pilot valve and cooling water inlet and return valves of a diffusion pump, and pre-vacuumizing the diffusion pump; starting an oil diffusion pump heating system when the vacu- um degree reaches 400 Pa; and preheating the diffusion pump for 40 minutes until the oil temperature increases to the oil evaporation temperature, closing the rough vacuumizing valve, and opening a precise vacuumizing valve until the pressure is 5x107° Pa.
Step 3, filling protective gas into the vacuum suspension smelting furnace: opening a pressure reducing valve, and opening an argon filling control valve to fill high-purity argon to 600 Pa.
Step 4, reducing the power step by step and smelting the raw materials in batches: Starting a water pump, heating and smelting the pure tungsten powder and the pure tantalum sheet; increasing the heating power to 130 kW, and maintaining for 3 minutes; then increasing the heating power to 220 kW, and maintaining for 3 minutes; increasing the heating power to 310 kW, and maintaining for 3 minutes; and finally increasing the heating power to 350 kW; and keeping the heating power unchanged, continuously heating the pure tungsten powder and the pure tantalum sheet, fully smelting, maintaining the temperature at 3200 °C, and heating for 6 minutes.
Reducing the heating power to 300 kW, gradually adding the pure molybdenum sheet into the melt through the feeder, fully melting, maintaining the temperature at 3,000 °C and heating for 4 minutes.
Reducing the heating power to 210 kW, adding the mixture of the zirconium sheet and the titanium sheet into the melt through the feeder, continuously heating to fully melt the uniform mixture of the zirconium sheet and titanium sheet, maintaining the temper- ature at 1,800 °C and heating for 4 minutes.
Step 5, refining the alloy: increasing the heating power to 300 kW and continuously heating for 15 minutes.
Step 6, cooling the alloy: gradually reducing the power of the power supply by taking every 60 kW as a step, and cooling to below 55 °C along with the furnace to obtain the ingot. And Step 7, repeatedly smelting the alloy ingot: in order to ob- tain the alloy ingot with uniform structure and high purity, heat- ing and smelting the cast ingot again; firstly, increasing the heating power to 80 kW and maintaining for 2 minutes; secondly, increasing the heating power to 150 kW and stabilizing for 2 minutes; finally, increasing the heating power to 200 kW, main- taining the temperature at 1800 °C and heating for 15 minutes; cooling the alloy to obtain the alloy ingot again; and repeatedly smelting for more than 3 times to obtain a molybdenum-tungsten- tantalum-titanium-zirconium high-entropy alloy with uniform struc- ture.
Example 2: Step 1, preparing materials: taking the molybdenum sheet, the tungsten powder, the tantalum sheet, the titanium sheet and the zirconium sheet with a purity of 99.99% as raw materials, grinding oxide skin layers on the surfaces of flaky raw materials by using a file or a grinding wheel, adding absolute ethanol to wash and dry the flaky raw materials by using an ultrasonic cleaning ma- chine, calculating the mass ratio of each component according to an equimolar ratio, with total mass of 2.5 Kg, and batching ac- cording to the mass percentage (wt%) of 15.99% of Mo, 30.65% of W,
30.17% of Ta, 7.98% of Ti and 15.21% of Zr; and fully and uniform- ly mixing the tungsten powder with the size of 200 meshes and the tantalum sheet, placing the mixture into a crucible with the diam- eter of 60 mm of a suspension smelting furnace, placing the molyb- denum sheet into a feeder, and placing the uniformly mixed zirco- nium sheet and titanium sheet into the feeder; Step 2, vacuumizing the vacuum suspension smelting furnace: Opening a mechanical pump, opening a rough vacuumizing valve, opening a roots pump when vacuumizing to 350 Pa, and continuously vacuumizing to 95 Pa.
Opening a pilot valve and cooling water inlet and return valves of a diffusion pump, and pre-vacuumizing the diffusion pump; starting an oil diffusion pump heating system when the vacu- um degree reaches 300 Pa; and preheating the diffusion pump for 40 minutes until the oil temperature increases to the oil evaporation temperature, closing the rough vacuumizing valve, and opening a precise vacuumizing valve until the pressure is 4 x10 Pa.
Step 3, filling protective gas into the vacuum suspension smelting furnace: opening a pressure reducing valve, and opening an argon filling control valve to fill high-purity argon to 500 Pa.
Step 4, reducing the power step by step and smelting the raw materials in batches: Starting a water pump, heating and smelting the pure tungsten powder and the pure tantalum sheet; increasing the heating power to 120 kW, and maintaining for 2 minutes; then increasing the heating power to 210 kW, and maintaining for 2 minutes; increasing the heating power to 300 kW, and maintaining for 2 minutes; and finally increasing the heating power to 350 kW; and keeping the heating power unchanged, continuously heating the pure tungsten powder and the pure tantalum sheet, fully smelting, maintaining the temperature at 3,150 °C, and heating for 8 minutes.
Reducing the heating power to 280 kW, gradually adding the pure molybdenum sheet into the melt through the feeder, fully melting, maintaining the temperature at 2,700 °C and heating for 3 minutes.
Reducing the heating power to 180 kW, adding the mixture of the zirconium sheet and the titanium sheet into the melt through the feeder, continuously heating to fully melt the uniform mixture of the zirconium sheet and titanium sheet, maintaining the temper- ature at 1,600 °C and heating for 3 minutes.
Step 5, refining the alloy: increasing the heating power to 290 kW and continuously heating for 10 minutes.
Step 6, cooling the alloy: gradually reducing the power of the power supply by taking every 50 kW as a step, and cooling to below 50 °C along with the furnace to obtain the ingot. And Step 7, repeatedly smelting the alloy ingot: in order to ob- tain the alloy ingot with uniform structure and high purity, heat- ing and smelting the cast ingot again; firstly, increasing the heating power to 75 kW and maintaining for 1 minute; secondly, in- creasing the heating power to 140 kW and stabilizing for 1 minute; finally, increasing the heating power to 190 kW, maintaining the temperature at 1,700 °C and heating for 10 minutes; cooling the alloy to obtain the alloy ingot again; and repeatedly smelting for more than 3 times to obtain a molybdenum-tungsten-tantalum- titanium-zirconium high-entropy alloy with uniform structure.

Claims (2)

CONCLUSIESCONCLUSIONS 1. Werkwijze voor het bereiden van een molybdeen-wolfraam-tantaal- titanium-zirkonium-legering met hoge entropie, die de volgende stappen omvat: Stap 1, materialen voorbereiden: verwijderen van oxidehuidlagen van een molybdeenblad, een tantaalblad, een titaniumblad en een zirkoniumblad en reinigen met behulp van een ultrasone reinigings- machine; en het uniform mengen van wolfraampoeder met een grootte van 100-300 mesh en een puur tantaalvel, en het uniform mengen van een puur titaniumvel en een puur zirkoniumvel; waarbij de atoom- molverhouding van de grondstoffen Mo:W:Ta:Ti:Zr = 1:1:1:1:1 is; Stap 2, vacuümeren van een smeltoven met vacuümsuspensie: vacume- ren tot het lage vacuüm 100-110 Pa is, en vacumeren tot het hoge vacuüm lager is dan 1x10° Pa; Stap 3, beschermend gas in de smeltoven met vacuümsuspensie vul- len: argon met hoge zuiverheid in de smeltoven met vacuümsuspensie vullen tot 450-750 Pa; Stap 4, het geleidelijk verminderen van het vermogen en het la- dingsgewijs smelten van grondstoffen: ten eerste, het verhogen van het verwarmingsvermogen tot 120-130 kW en het gedurende 2-3 minu- ten daarop handhaven; ten tweede, het verhogen van het verwar- mingsvermogen tot 210-220 kW en het gedurende 2-3 minuten daarop handhaven; ten derde, het verhogen van het verwarmingsvermogen tot 300-310 kW en het gedurende 2-3 minuten daarop handhaven; tot slot het verhogen van het verwarmingsvermogen tot 350 kW; en het ver- mogen onveranderd houden, het continu verwarmen om het pure wol- fraampoeder en het pure tantaalblad volledig te smelten, het hand- haven van de temperatuur op 3.050-3.250 °C en het 5-10 minuten te verwarmen; het verminderen van het verwarmingsvermogen tot 280-300 kW, het via een feeder geleidelijk aan de smelt toevoegen van het pure mo- lybdeenblad, het geheel smelten, het handhaven van de temperatuur op 2.650-3.000 °C en het 3-5 minuten te verwarmen; het vermindering van het verwarmingsvermogen tot 180-210 kW, het via de feeder geleidelijk aan de smelt toevoegen van de zirkonium-A method for preparing a molybdenum-tungsten-tantalum-titanium-zirconium alloy with high entropy, comprising the following steps: Step 1, preparing materials: removing oxide skin layers from a molybdenum sheet, a tantalum sheet, a titanium sheet and a zirconium sheet and cleaning using an ultrasonic cleaning machine; and uniformly mixing tungsten powder with a size of 100-300 mesh and a pure tantalum sheet, and uniformly mixing a pure titanium sheet and a pure zirconium sheet; wherein the atomic-mole ratio of the raw materials is Mo:W:Ta:Ti:Zr = 1:1:1:1:1; Step 2, evacuating a melting furnace with vacuum slurry: evacuating until the low vacuum is 100-110 Pa, and evacuating until the high vacuum is less than 1x10° Pa; Step 3, filling protective gas into the melting furnace with vacuum slurry: filling high purity argon into the melting furnace with vacuum slurry to 450-750 Pa; Step 4, gradually reducing the power and batch melting of raw materials: firstly, increasing the heating power to 120-130 kW and maintaining it for 2-3 minutes; secondly, increase the heating power to 210-220 kW and maintain it for 2-3 minutes; third, increasing the heating power to 300-310 kW and maintaining it for 2-3 minutes; finally increasing the heating capacity to 350 kW; and keeping the power unchanged, heating continuously to completely melt the pure tungsten powder and pure tantalum sheet, maintaining the temperature at 3,050-3,250°C, and heating for 5-10 minutes; reducing the heating power to 280-300 kW, gradually adding the pure molybdenum sheet to the melt through a feeder, melting the whole, maintaining the temperature at 2,650-3,000 °C and heating it for 3-5 minutes ; reducing the heating power to 180-210 kW, gradually adding the zirconium plaat en de titaniumplaat, het continu verwarmen om het uniforme mengsel van de zirkoniumplaat en de titaniumplaat volledig te smelten, waarbij de temperatuur op 1.600-1.850 °C wordt gehouden en het 3-5 minuten te verwarmen; Stap 5, raffineren van de legering: verhoging van het verwarmings- vermogen tot 280-300 kW en het continu verwarmen gedurende 8-10 minuten; Stap 6, afkoeling van de legering: het geleidelijk verminderen van het vermogen van de voeding door telkens 40-60 kW als een stap te nemen, het samen met de oven afkoelen tot onder 60 °C om een staaf te verkrijgen; en Stap 7, het herhaaldelijk smelten van de legeringsstaaf: om een legeringsstaaf te verkrijgen met een uniforme structuur en hoge zuiverheid, het opnieuw verwarmen en smelten van de gegoten staaf; ten eerste, het verwarmingsvermogen verhogen tot 75-85 kW en 1-2 minuten aanhouden; ten tweede, het verwarmingsvermogen ver- hogen tot 130-150 kW en 1-2 minuten handhaven; ten slotte, het verwarmingsvermogen verhogen tot 170-210 kW, de temperatuur op 1500-1850 °C houden en 10-15 minuten verwarmen; het afkoelen van de legering om de legeringsstaaf opnieuw te verkrijgen; en het herhaaldelijk smelten gedurende meer dan 3 keer om een molybdeen- wolfraam-tantaal-titanium-zirkonium legering met hoge entropie en uniforme structuur te verkrijgen.plate and the titanium plate, heating continuously to completely melt the uniform mixture of the zirconium plate and titanium plate, keeping the temperature at 1,600-1,850 °C and heating it for 3-5 minutes; Step 5, refining the alloy: increasing the heating power to 280-300 kW and heating continuously for 8-10 minutes; Step 6, cooling the alloy: gradually reducing the power of the power supply by taking 40-60 kW each time as a step, cooling it down to below 60 °C together with the furnace to obtain a bar; and Step 7, repeatedly melting the alloy ingot: to obtain an alloy ingot with a uniform structure and high purity, reheating and melting the cast ingot; first, increase the heating power to 75-85 kW and hold for 1-2 minutes; second, increase the heating power to 130-150 kW and maintain it for 1-2 minutes; finally, increase the heating power to 170-210 kW, keep the temperature at 1500-1850 °C and heat for 10-15 minutes; cooling the alloy to recover the alloy bar; and melting repeatedly for more than 3 times to obtain a molybdenum-tungsten-tantalum-titanium-zirconium alloy with high entropy and uniform structure. 2. Werkwijze voor het bereiden van een molybdeen-wolfraam-tantaal- titaan-zirkonium-legering met hoge entropie volgens conclusie 1, waarbij het molybdeenvel, het wolfraampoeder, het tantaalvel, het titaniumvel en het zirkoniumvel in stap 1 een zuiverheid hebben. hoger dan 99,99 gew.%.The method for preparing a high entropy molybdenum-tungsten-tantalum-titanium-zirconium alloy according to claim 1, wherein the molybdenum sheet, the tungsten powder, the tantalum sheet, the titanium sheet and the zirconium sheet in step 1 have a purity. higher than 99.99% by weight.
NL2029725A 2021-11-11 2021-11-11 Method for preparing high-entropy alloy NL2029725B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL2029725A NL2029725B1 (en) 2021-11-11 2021-11-11 Method for preparing high-entropy alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2029725A NL2029725B1 (en) 2021-11-11 2021-11-11 Method for preparing high-entropy alloy

Publications (2)

Publication Number Publication Date
NL2029725A NL2029725A (en) 2021-12-13
NL2029725B1 true NL2029725B1 (en) 2022-10-20

Family

ID=79170518

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2029725A NL2029725B1 (en) 2021-11-11 2021-11-11 Method for preparing high-entropy alloy

Country Status (1)

Country Link
NL (1) NL2029725B1 (en)

Also Published As

Publication number Publication date
NL2029725A (en) 2021-12-13

Similar Documents

Publication Publication Date Title
CN107935596B (en) MAX-phase ceramic Ti prepared by low-temperature sintering by molten salt method3AlC2Method for producing powder
CN105463222B (en) A kind of endogenous TiC Ti5Si3The preparation method of granule intensified titanium-base compound material
CN113046595B (en) High-strength and high-toughness titanium alloy with good additive manufacturing forming performance and used at high temperature of 600 DEG C
CN112553501B (en) Titanium-niobium shape memory alloy with adjustable negative thermal expansion and preparation method thereof
JP6393696B2 (en) Cu-Ga-In-Na target
CN100575521C (en) A kind of aluminium-titanium-carbon-boron-nitrogen master alloy and preparation method thereof
CN112458336B (en) Titanium-niobium-oxygen alloy with negative thermal expansion and preparation method thereof
Fujieda et al. Electron beam melting of boron-modified Ti–6Al–2Sn–4Zr–2Mo–0.1 Si alloy with superior tensile strength and oxidation resistance at elevated temperatures
JP2020519761A (en) Method for producing refractory metal powder by multi-stage and advanced reduction
CN114774727B (en) Preparation method of nano zirconium dioxide reinforced NbMoTaW refractory high-entropy alloy
CN106636746A (en) High-strength and high-elongation high-temperature titanium alloy and preparing technology thereof
KR20220021763A (en) High Entropy Alloy with Heterogenous Complex Microstructure and The Manufacturing Method Thereof
CN113373366A (en) Multi-element refractory high-entropy alloy and preparation method thereof
CN112592183B (en) Preparation method of Zr-Al-C series MAX phase ceramic powder product
CN113025843B (en) Ti-Al-V-Zr high-temperature-resistant high-strength and high-toughness titanium alloy with good additive manufacturing performance and application thereof
CN113025844B (en) High-temperature titanium alloy and preparation method thereof
NL2029725B1 (en) Method for preparing high-entropy alloy
CN104651696A (en) TiC dispersion-strengthened molybdenum alloy and preparation method thereof
CN108251670A (en) The preparation method of compound alloy between refractory metal
CN109722584B (en) Method for preparing molybdenum-tungsten-tantalum-titanium-zirconium high-entropy alloy
CN104475747A (en) Method for sintering preparation of tantalum powder for high-purity tantalum ingots by carbon reduction process
CN114855048B (en) High-strength plastic self-passivation refractory high-entropy alloy and preparation method thereof
JP7139418B2 (en) Alloy turbine parts containing MAX phase
CN114892033B (en) Preparation method of high-temperature wear-resistant refractory high-entropy alloy
CN115011844A (en) Rhenium-containing tungsten-free low-specific gravity nickel-based single crystal superalloy and heat treatment process thereof