CN108411132A - A kind of preparation method of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys - Google Patents
A kind of preparation method of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys Download PDFInfo
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- CN108411132A CN108411132A CN201810417976.7A CN201810417976A CN108411132A CN 108411132 A CN108411132 A CN 108411132A CN 201810417976 A CN201810417976 A CN 201810417976A CN 108411132 A CN108411132 A CN 108411132A
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- 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
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- 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
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- 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
Abstract
The invention discloses a kind of preparation methods of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys.Ingredient used be equimolar than iron, manganese, nickel, cobalt and chromium metal.Preparation method is dispensing；Melting is carried out using magnetic levitation vacuum smelting furnace, smelting temperature is 1200~1500 DEG C, and smelting time is 5~20min, and air-cooled processing is used after melting；High-entropy alloy block is forged at 1000~1200 DEG C, alloy after forging is warming up to 750~1000 DEG C, keeps the temperature 2~4h, furnace cooling by sample natural cooling in air after forging.The present invention prepares high-entropy alloy using magnetic levitation vacuum melting technique; so that high-entropy alloy has splendid plasticity under the premise of keeping high rigidity and high intensity; large-sized high-entropy alloy can be prepared; it is expected to push the further development of high-entropy alloy in actual production, is conducive to industrial scale and produces.
Description
Technical field
The present invention relates to technical field of metal material, more particularly to a kind of magnetic levitation vacuum melting FeMnNiCoCr high entropys close
The preparation method of gold.
Background technology
High-entropy alloy be typically one kind is made of five kinds or five kinds or more pivots, each element ingredient equimolar ratio or close to etc.
Molar ratio, smelting or other methods prepare the novel alloy of gained；The appearance of high-entropy alloy has broken conventional alloys with a certain
Kind element is the design concept of absolute pivot, has many performances better than conventional alloys, shows high intensity, high rigidity, height
Wearability etc..
High-entropy alloy conventional preparation techniques are generally prepared using heating melting or electrochemical deposition method, two class preparation methods pair
Selected constituent element has a higher selectivity, and equipment is expensive and preparation time is longer, high energy consumption.Although high-entropy alloy has many excellent
Performance, but be not widely used at present.Reason is high-entropy alloy while obtaining high intensity, and plasticity is tight
It reduces again, brittleness is big, and intensity and plasticity can not be taken into account very well.This is urgent problem instantly,.Have so prepared by development
High intensity has the hot spot that the high-entropy alloy of good plasticity also becomes current research simultaneously.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of magnetic levitation vacuum melting FeMnNiCoCr high
The preparation method of entropy alloy.
The technical scheme is that：A kind of preparation method of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys, packet
Include following steps：
（1）Dispensing；According to equimolar than proportioning weigh iron, manganese, nickel, cobalt and chromium metal, carry out raw material preparation；
（2）Melting；The raw material prepared is put into magnetic levitation vacuum smelting furnace, parameter is set, melting, melting are carried out to raw material
After carry out air-cooled processing, temperature reduces by 3 ~ 5 DEG C in every two seconds, obtains cast alloy；
（3）Forging；Cast alloy is forged, forging temperature is 1000~1200 DEG C, and forging is forged using three-dimensional, after forging
Natural cooling in air；
（4）Annealing；Alloy after forging is put into annealing furnace and is made annealing treatment, annealing temperature is 750~1000 DEG C, heat preservation
Time is 2~4h, and room temperature is cooled to the furnace after heat preservation, obtains the FeMnNiCoCr high-entropy alloys of the present invention.
Further, the step（1）In iron, manganese, nickel, cobalt and chromium raw metal purity 99% or more.
Further, the step（2）In magnetic levitation vacuum smelting furnace arrange parameter be：Smelting temperature be 1200~
1500 DEG C, smelting time is 5~20min.
Further, the step（4）Heating rate in annealing furnace is 2~5 DEG C/min.
The beneficial effects of the invention are as follows：
1, the intensity of alloy is improved under normal conditions, and plasticity will be deteriorated, and high-entropy alloy is no exception.Although high-entropy alloy can
With with very high intensity, but its plasticity is often very low, and which also limits the applications of high-entropy alloy.The present invention is true by magnetic suspension
The method of empty melting after alloy is hot-forged and is heat-treated, can not only make high-entropy alloy have higher intensity, can be with
It is set to be provided simultaneously with high plasticity（Elongation percentage is up to 40% or more）, to make high-entropy alloy that there is preferable comprehensive performance.
2, the present invention can prepare large-sized high-entropy alloy, and the size of the high-entropy alloy of prior art preparation is very
It is limited, therefore the present invention is expected to push the further development of high-entropy alloy in actual production, is conducive to industrial scale and produces.
Description of the drawings
Fig. 1 is XRD spectrum of the high-entropy alloy of the present invention after different temperatures is heat-treated.
Fig. 2 is the load-deformation curve for the high-entropy alloy being heat-treated by different temperatures.
Fig. 3 is the high-entropy alloy stretching fracture shape appearance figure being heat-treated by different temperatures.
Reference numeral：（a）It is 800 DEG C；（b）It is 900 DEG C；（c）It is 1000 DEG C.
Specific implementation mode
Embodiment 1
A kind of preparation method of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys, includes the following steps：
（1）Dispensing；It is 1 according to equimolar ratio：1：1：1：1 weighs iron, manganese, nickel, cobalt and chromium metal, carries out raw material preparation；
（2）Melting；The raw material prepared is put into magnetic levitation vacuum smelting furnace, smelting temperature is 1350 DEG C, smelting time 10
Minute, air-cooled processing is carried out after melting, temperature reduces by 3 ~ 5 DEG C in every two seconds, obtains cast alloy；
（3）Forging；Cast alloy is forged, forging temperature is 1160 DEG C, and forging is forged using three-dimensional, in air after forging
Middle natural cooling；
（4）Annealing；Alloy after forging is put into annealing furnace and is made annealing treatment, is warming up to the heating rate of 5 DEG C/min
800 DEG C, soaking time 2h cools to room temperature with the furnace after heat preservation, obtains the FeMnNiCoCr high-entropy alloys of the present invention.
Embodiment 2
A kind of preparation method of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys, includes the following steps：
（1）Dispensing；It is 1 according to equimolar ratio：1：1：1：1 weighs iron, manganese, nickel, cobalt and chromium metal, carries out raw material preparation；
（2）Melting；The raw material prepared is put into magnetic levitation vacuum smelting furnace, smelting temperature is 1350 DEG C, smelting time 10
Minute, air-cooled processing is carried out after melting, temperature reduces by 3 ~ 5 DEG C in every two seconds, obtains cast alloy；
（3）Forging；Cast alloy is forged, forging temperature is 1160 DEG C, and forging is forged using three-dimensional, in air after forging
Middle natural cooling；
（4）Annealing；Alloy after forging is put into annealing furnace and is made annealing treatment, is warming up to the heating rate of 5 DEG C/min
900 DEG C, soaking time 2h cools to room temperature with the furnace after heat preservation, obtains the FeMnNiCoCr high-entropy alloys of the present invention.
Embodiment 3
A kind of preparation method of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys, includes the following steps：
（1）Dispensing；It is 1 according to equimolar ratio：1：1：1：1 weighs iron, manganese, nickel, cobalt and chromium metal, carries out raw material preparation；
（2）Melting；The raw material prepared is put into magnetic levitation vacuum smelting furnace, smelting temperature is 1350 DEG C, smelting time 10
Minute, air-cooled processing is carried out after melting, temperature reduces by 3 ~ 5 DEG C in every two seconds, obtains cast alloy；
（3）Forging；Cast alloy is forged, forging temperature is 1160 DEG C, and forging is forged using three-dimensional, in air after forging
Middle natural cooling；
（4）Annealing；Alloy after forging is put into annealing furnace and is made annealing treatment, is warming up to the heating rate of 5 DEG C/min
1000 DEG C, soaking time 2h cools to room temperature with the furnace after heat preservation, obtains the FeMnNiCoCr high-entropy alloys of the present invention.
FeMnNiCoCr high-entropy alloys prepared by embodiment 1 to embodiment 3 are subjected to X-ray diffraction analysis, micro- respectively
Hardness test, tensile property test and appearance analysis.
Sample is processed into the thin slice of 10 × 15 × 3mm, is tested with X-ray diffractometer after sand paper polishing；Such as Fig. 1 institutes
Show, FeMnNiCoCr high-entropy alloys of the invention are still simple face-centred cubic structure after the heat treatment of different temperatures.
Hardness test is carried out with microhardness testers after specimen surface is polished with sand paper, the hardness number of 5 points is surveyed, is averaged
Value；As shown in table 1, the hardness ratio cast alloy of the high-entropy alloy after forging and heat treatment is significantly improved, high entropy
The hardness of alloy is reduced with the raising of heat treatment temperature, but still higher than as cast condition.
The microhardness of 1 high-entropy alloy of table.
It is 50mm, a length of 15mm of gauge length, the stretching of the wide 2mm of gauge length section, thickness 1mm that alloy, which is processed into overall length, with wire cutting
Sample is stretched with the speed of 1mm/min；The high-entropy alloy after different heat treatment is can be seen that from table 2 and Fig. 2 to protect
Higher intensity is held, and there is splendid plasticity；Tensile strength reaches 728.8MPa at 800 DEG C, and elongation percentage is up to 45.09%,
Comprehensive performance is best.
The tensile property for the high-entropy alloy that table 2 is heat-treated after forging by different temperatures.
The pattern of fracture surface of sample after being stretched using scanning electron microscopic observation, the height that different temperatures is heat-treated as can be seen from Figure 3
Entropy Alloy Fracture all has a large amount of dimple, illustrates to be fractured into typical ductile rupture.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The variation expected without creative work or simple replacement should be all included within the scope of the present invention.
Claims (4)
1. a kind of preparation method of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys, which is characterized in that include the following steps：
（1）Dispensing；According to equimolar than proportioning weigh iron, manganese, nickel, cobalt and chromium metal, carry out raw material preparation；
（2）Melting；The raw material prepared is put into magnetic levitation vacuum smelting furnace, parameter is set, melting, melting are carried out to raw material
After carry out air-cooled processing, temperature reduces by 3 ~ 5 DEG C in every two seconds, obtains cast alloy；
（3）Forging；Cast alloy is forged, forging temperature is 1000~1200 DEG C, and forging is forged using three-dimensional, after forging
Natural cooling in air；
（4）Annealing；Alloy after forging is put into annealing furnace and is made annealing treatment, annealing temperature is 750~1000 DEG C, heat preservation
Time is 2~4h, and room temperature is cooled to the furnace after heat preservation, obtains the FeMnNiCoCr high-entropy alloys of the present invention.
2. the preparation method of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys according to claim 1, feature exist
In：The step（1）In iron, manganese, nickel, cobalt and chromium raw metal purity 99% or more.
3. the preparation method of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys according to claim 1, feature exist
In：The step（2）In magnetic levitation vacuum smelting furnace arrange parameter be：Smelting temperature is 1200~1500 DEG C, smelting time
For 5~20min.
4. the preparation method of magnetic levitation vacuum melting FeMnNiCoCr high-entropy alloys according to claim 1, feature exist
In：The step（4）Heating rate in annealing furnace is 2~5 DEG C/min.
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Cited By (10)
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|---|---|---|---|---|
| CN109023004A (en) * | 2018-09-03 | 2018-12-18 | 合肥工业大学 | A kind of single-phase infusibility high-entropy alloy and preparation method thereof towards plasma tungstenic |
| CN109666811A (en) * | 2019-01-29 | 2019-04-23 | 大连理工大学 | A kind of radiation resistance high-entropy alloy and preparation method thereof |
| CN109881030A (en) * | 2019-04-04 | 2019-06-14 | 合肥工业大学 | A kind of double structure high-entropy alloy and preparation method thereof |
| CN110218929A (en) * | 2019-07-08 | 2019-09-10 | 广西大学 | A kind of method of Strengthening and Toughening FeMnNiCoCr high-entropy alloy |
| CN112251660A (en) * | 2020-10-14 | 2021-01-22 | 东北大学 | High-strength forged high-entropy alloy and preparation method thereof |
| CN112522634A (en) * | 2019-09-17 | 2021-03-19 | 东北大学 | High-strength high-entropy alloy and preparation method thereof |
| CN113201678A (en) * | 2021-04-28 | 2021-08-03 | 东南大学 | Carbon-containing high-entropy alloy material and preparation method thereof |
| CN113699424A (en) * | 2021-08-31 | 2021-11-26 | 张家港江苏科技大学产业技术研究院 | High-entropy alloy material, surface laser remelting method and gradient high-entropy alloy material |
| CN114075635A (en) * | 2020-08-10 | 2022-02-22 | 北京理工大学 | High-quality heat value aluminum-silicon alloy powder material and preparation method thereof |
| CN114657435A (en) * | 2022-02-28 | 2022-06-24 | 东南大学 | Industrial pure single-phase high-entropy alloy and preparation method thereof |
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| CN107326246A (en) * | 2017-07-17 | 2017-11-07 | 西安交通大学 | A kind of high-performance high-entropy alloy and its processing method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023004A (en) * | 2018-09-03 | 2018-12-18 | 合肥工业大学 | A kind of single-phase infusibility high-entropy alloy and preparation method thereof towards plasma tungstenic |
| CN109666811B (en) * | 2019-01-29 | 2021-02-19 | 大连理工大学 | Irradiation-resistant high-entropy alloy |
| CN109666811A (en) * | 2019-01-29 | 2019-04-23 | 大连理工大学 | A kind of radiation resistance high-entropy alloy and preparation method thereof |
| CN109881030A (en) * | 2019-04-04 | 2019-06-14 | 合肥工业大学 | A kind of double structure high-entropy alloy and preparation method thereof |
| CN110218929A (en) * | 2019-07-08 | 2019-09-10 | 广西大学 | A kind of method of Strengthening and Toughening FeMnNiCoCr high-entropy alloy |
| CN112522634A (en) * | 2019-09-17 | 2021-03-19 | 东北大学 | High-strength high-entropy alloy and preparation method thereof |
| CN112522634B (en) * | 2019-09-17 | 2021-11-09 | 东北大学 | High-strength high-entropy alloy and preparation method thereof |
| CN114075635A (en) * | 2020-08-10 | 2022-02-22 | 北京理工大学 | High-quality heat value aluminum-silicon alloy powder material and preparation method thereof |
| CN112251660A (en) * | 2020-10-14 | 2021-01-22 | 东北大学 | High-strength forged high-entropy alloy and preparation method thereof |
| CN112251660B (en) * | 2020-10-14 | 2021-12-24 | 东北大学 | High-strength forged high-entropy alloy and preparation method thereof |
| CN113201678A (en) * | 2021-04-28 | 2021-08-03 | 东南大学 | Carbon-containing high-entropy alloy material and preparation method thereof |
| CN113699424A (en) * | 2021-08-31 | 2021-11-26 | 张家港江苏科技大学产业技术研究院 | High-entropy alloy material, surface laser remelting method and gradient high-entropy alloy material |
| CN114657435A (en) * | 2022-02-28 | 2022-06-24 | 东南大学 | Industrial pure single-phase high-entropy alloy and preparation method thereof |
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Application publication date: 20180817 |