CN107083527A - It is a kind of to be heat-treated the method that plastic deformation improves single-phase high-entropy alloy intensity that combines - Google Patents
It is a kind of to be heat-treated the method that plastic deformation improves single-phase high-entropy alloy intensity that combines Download PDFInfo
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Abstract
The method that plastic deformation improves single-phase high-entropy alloy intensity that combines is heat-treated the invention discloses a kind of, belongs to high-entropy alloy reinforcing technical field of modification, by Al0.5CrCuFeNi2The method processing that high-entropy alloy is combined using Ageing Treatment and rolling compression, the heat treatment is Ageing Treatment, and high-entropy alloy sample is carried out into Ageing Treatment, and aging temp is 200 950 DEG C, and the 5h of soaking time 0.5 then takes out rear air cooling；Described to be plastic deformation to rolling compression, its deflection is 30% 80% strong hardness that high-entropy alloy is significantly improved while its plasticity is ensured.The method that the present invention is provided can make high-entropy alloy intensity while plasticity is ensured improve 10% 95%, and its comprehensive mechanical property is excellent, has widened the application of high-entropy alloy；The invention that the present invention is provided is easy to operate, and feasibility is strong, and effect is notable.
Description
Technical field
The invention belongs to high-entropy alloy reinforcing technical field of modification, more particularly to a kind of side for improving high-entropy alloy intensity
Method, refers in particular to be heat-treated with being plastically deformed the method being combined to improve single-phase high-entropy alloy intensity.
Background technology
High-entropy alloy is by n（n≥5）Kind of metal or with it is nonmetallic, with equimolar ratio or non-equimolar ratio（Each constituent element atom
Percentage is no more than 35%）Smelting, sintering or other method combine and form the material with metallic character.Because in alloy
Metallic element it is many, randomness is big, and high entropic effect promotes the mixing between element so that a variety of host elements tendency confusing arrays and
Simple body-centered cubic or face-centered cubic crystal, or even amorphization are formed, while inhibiting brittle intermetallic compound
Formed.Therefore such alloy has high rigidity, high compressive strength and superior wearability and corrosion resistance, and characteristic is substantially better than biography
Integration gold, is expected to largely be applied to make high intensity, high temperature resistant, corrosion resistant cutter, mould, or even be expected to replace high
Noble metal structures part is used under the extreme conditions such as superhigh temperature, with great industrial development potentiality.
Although high-entropy alloy has many excellent performances, most of high-entropy alloy be limited in that its fragility compared with
Greatly, low cross-intensity, the structural member under complex loading conditions is applied to which limits high-entropy alloy.Current high-entropy alloy
Reinforcing can use for reference the intensifying method of traditional metal materials, such as solution strengthening, and ageing strengthening, processing hardening and heat treatment etc. are passed
System method.Nearly stage research understands that the plasticity of the high-entropy alloy of FCC configuration is often higher than the high-entropy alloy of BCC structures；And intensity
Then be often below BCC structures high-entropy alloy, two-phase high-entropy alloy then due to the simple composite between " dendrite " of itself, and
So that intensity and plasticity are substantially therebetween, can not equally meet intensity it is moulding on double requirements.Discounting for adding
Work is hardened, and purely improves limitation to the intensity of single-phase FCC or BCC types high-entropy alloy using microalloying method.Although plasticity
The processing hardening that Zona transformans comes can significantly improve the high-entropy alloy of pure solid solution phase structure really, but as processing hardening is to passing
As the influence of integration gold, this reinforcing means are decreased obviously the plasticity of alloy, toughness, and intensity, hardness keep stabilization
Temperature range is also restricted, which limits high-entropy alloy thermal structure field possible application.Find a kind of protecting
The method that its intensity is improved while card plasticity is applied to solve the problems, such as needed for industrial production as promotion high-entropy alloy.
The content of the invention
In order to solve the problems of the prior art, the present invention provides a kind of heat treatment combination plastic deformation and improves single-phase high entropy
The method of alloy strength, improves the intensity of high-entropy alloy while its plasticity is ensured.
To achieve the above object, the technical solution adopted by the present invention is：
It is a kind of to be heat-treated the method that plastic deformation improves single-phase high-entropy alloy intensity that combines, high-entropy alloy is heat-treated and moulded
Property deformation,
The heat treatment is Ageing Treatment, and high-entropy alloy sample is carried out into Ageing Treatment, and aging temp is 200-950 DEG C, insulation
Time 0.5-5h, then takes out rear air cooling；
Described to be plastic deformation to rolling compression, its deflection is 30%-80%.
Further, the single-phase face-centred cubic structure that the high-entropy alloy is made up of aluminium, chromium, copper, iron, nickel element.
Further, the high-entropy alloy is Al0.5CrCuFeNi2Alloy.
Further, during Ageing Treatment, by high-entropy alloy sample as carrying out Ageing Treatment in resistance furnace.
Further, stress relief annealing after high-entropy alloy being heat-treated and is plastically deformed, wherein heat treatment and plasticity
Deform any one step formerly.
Further, the stress relief annealing is to be heated to the high-entropy alloy sample after Overheating Treatment and plastic deformation
180-220 DEG C, 0.5-2.0h is incubated, residual stress is eliminated.
Further, resistance will be placed in through Overheating Treatment with the high-entropy alloy sample after plastic deformation by removing in stress annealing
180-220 DEG C is heated in stove, 0.5-2.0h is incubated.
Compared with prior art, the present invention has advantages below：
The method that the present invention is provided can make high-entropy alloy intensity while plasticity is ensured improve 10%-95%, and it integrates mechanical property
Can be excellent, widen the application of high-entropy alloy；The present invention is easy to operate, and feasibility is strong, and effect is notable.
Brief description of the drawings
Fig. 1 is Al0.5CrCuFeNi2The XRD spectrum of as cast condition high-entropy alloy, its structure is FCC；
Fig. 2 is Al0.5CrCuFeNi2The Metallograph of as cast condition high-entropy alloy；
Fig. 3 is Al0.5CrCuFeNi2Metallograph of the as cast condition high-entropy alloy after 600 DEG C of insulations air cooling processing in 2 hours；
Fig. 4 is the Al that Ageing Treatment is crossed0.5CrCuFeNi2Metallographic microstructure of the as cast condition high-entropy alloy after 60% rolling deformation
Photo；
Fig. 5 is Al0.5CrCuFeNi2Metallograph of the as cast condition high-entropy alloy after 700 DEG C of insulations air cooling processing in 2 hours；
Fig. 6 is Al0.5CrCuFeNi2As cast condition high-entropy alloy Ageing Treatment, Ageing Treatment with plastic deformation combine processing after hardness with
The change curve for the treatment of temperature；
Fig. 7 is Al0.5CrCuFeNi2Firmness change curve after as cast condition high-entropy alloy is plastically deformed in various degree；
Fig. 8 is Al0.5CrCuFeNi2As cast condition high-entropy alloy is bent through room temperature compression stress before and after different temperatures Ageing Treatment-strain
Line.
Embodiment
The present invention is further described with reference to embodiment.
The Al0.5CrCuFeNi2Alloy is fabricated to diameter by the preparation of alloy using the method for electric arc furnaces suction pouring
φ 3mm Al0.5CrCuFeNi2As-cast specimen.
To Al0.5CrCuFeNi2As-cast specimen carries out X-ray diffraction analysis composition and structure, observes sample microscopic structure shape
Looks, Fig. 1 is Al0.5CrCuFeNi2As-cast specimen XRD spectrum, its structure is FCC（Face-centred cubic structure）, Fig. 2 is as-cast specimen
Microstructure picture.It is 222.9HV with microhardness testers measurement sample microhardness.
Embodiment 1
By Al0.5CrCuFeNi2As-cast specimen carries out Ageing Treatment, 600 DEG C of aging temp, soaking time 2 hours in resistance furnace
Then air cooling, its displaing micro tissue topography to sample as shown in figure 3, carry out rolling process, deflection is 60%, micro- after compression afterwards
Tissue topography is seen as shown in figure 4, measuring its microhardness value for 341.6HV, 53.3% is improved compared with before processing hardness, effect shows
Write.
Embodiment 2
By Al0.5CrCuFeNi2As-cast specimen carries out Ageing Treatment in resistance furnace, 750 DEG C of aging temp, and soaking time 2.5 is small
When after air cooling, its displaing micro tissue topography as shown in figure 5, then to sample carry out rolling process, deflection is 60%, measures its hard
Angle value is 403.8HV, and 81% is improved compared with before processing hardness.
Embodiment 3
By Al0.5CrCuFeNi2As-cast specimen is incubated 5h at a temperature of 200 DEG C, takes out air cooling, then carries out deflection 80% to it
Rolling compression processing, after processing can optionally by sample be placed at 180 DEG C be incubated 2h carry out stress relief annealing process, to subtract
Low residual stress, high-entropy alloy intensity while plasticity is ensured improves 95%.
Embodiment 4
By Al0.5CrCuFeNi2As-cast specimen is incubated 0.5h at a temperature of 950 DEG C, takes out air cooling, then carries out deflection to it
Sample, can optionally be placed at 220 DEG C and be incubated at 0.5h progress stress relief annealings by 30% rolling compression processing after processing
Reason, to reduce residual stress, high-entropy alloy intensity while plasticity is ensured improves 10%.
Embodiment 5
By Al0.5CrCuFeNi2As-cast specimen is incubated 0.5h at a temperature of 950 DEG C, takes out air cooling, then carries out deflection to it
Sample, can optionally be placed at 200 DEG C and be incubated at 1.0h progress stress relief annealings by 60% rolling compression processing after processing
Reason, to reduce residual stress, high-entropy alloy intensity while plasticity is ensured improves 80%.
As shown in fig. 6, by Al0.5CrCuFeNi2Ageing Treatment is carried out at the respectively different temperature of as-cast specimen, is then carried out
Deflection is 60% compression, and change curve of the microhardness with treatment temperature, comparison diagram 7 are measured respectively it can be seen that only
Limited to the raising of intensity using plastic deformation method, the method for the invention can increase substantially the intensity of high-entropy alloy.
Embodiment 6
By Al0.5CrCuFeNi2As-cast specimen is incubated 2.0h at a temperature of 600 DEG C, takes out air cooling, then carries out deflection to it
60% rolling compression processing.
Embodiment 7
By Al0.5CrCuFeNi2As-cast specimen is incubated 2h at a temperature of 700 DEG C, takes out air cooling, then carries out deflection 60% to it
Rolling compression processing.
Embodiment 8
By Al0.5CrCuFeNi2As-cast specimen is incubated 2h at a temperature of 750 DEG C, takes out air cooling, then carries out deflection 60% to it
Rolling compression processing.
Embodiment 9
By Al0.5CrCuFeNi2As-cast specimen is incubated 2h at a temperature of 800 DEG C, takes out air cooling, then carries out deflection 60% to it
Rolling compression processing.
As shown in figure 8, different temperatures（600℃、700℃、750℃、800℃）Compression stress strain is measured after Ageing Treatment
Curve, Fig. 8 compression stress strain curves illustrate that material plasticity is excellent without surrender in situation is risen.
Embodiment 10
By Al0.5CrCuFeNi2As-cast specimen carries out the rolling compression of deflection 60%, is then incubated air cooling after 2h, taking-up,
Hardness is measured for 362.7HV, hardness improves 62.7%, be the same as Example 1, which compares, to be understood, this method and heat treatment and plastic deformation
Sequencing it is unrelated.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of be heat-treated the method that plastic deformation improves single-phase high-entropy alloy intensity that combines, it is characterised in that：By high-entropy alloy
It is heat-treated and is plastically deformed,
The heat treatment is Ageing Treatment, and high-entropy alloy sample is carried out into Ageing Treatment, and aging temp is 200-950 DEG C, insulation
Time 0.5-5h, then takes out rear air cooling；
Described to be plastic deformation to rolling compression, its deflection is 30%-80%.
2. a kind of method for being heat-treated the single-phase high-entropy alloy intensity of combination plastic deformation raising according to claim 1, its
It is characterised by：The single-phase face-centred cubic structure that the high-entropy alloy is made up of aluminium, chromium, copper, iron, nickel element.
3. a kind of method for being heat-treated the single-phase high-entropy alloy intensity of combination plastic deformation raising according to claim 2, its
It is characterised by：The high-entropy alloy is Al0.5CrCuFeNi2Alloy.
4. a kind of method for being heat-treated the single-phase high-entropy alloy intensity of combination plastic deformation raising according to claim 1, its
It is characterised by：During Ageing Treatment, high-entropy alloy sample is placed in resistance furnace and carries out Ageing Treatment.
5. a kind of method for being heat-treated the single-phase high-entropy alloy intensity of combination plastic deformation raising according to claim 1, its
It is characterised by：Stress relief annealing after high-entropy alloy is heat-treated and is plastically deformed, wherein being heat-treated and being plastically deformed and be any
One step is formerly.
6. a kind of method for being heat-treated the single-phase high-entropy alloy intensity of combination plastic deformation raising according to claim 5, its
It is characterised by：The stress relief annealing is that the high-entropy alloy sample after Overheating Treatment and plastic deformation is heated into 180-220
DEG C, 0.5-2.0h is incubated, residual stress is eliminated.
7. a kind of method for being heat-treated the single-phase high-entropy alloy intensity of combination plastic deformation raising according to claim 6, its
It is characterised by：Remove that the high-entropy alloy sample after Overheating Treatment and plastic deformation is placed in resistance furnace in stress annealing and heat
To 180-220 DEG C, 0.5-2.0h is incubated.
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Cited By (7)
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| CN107893184A (en) * | 2017-11-08 | 2018-04-10 | 太原理工大学 | A kind of nanometer Ultra-fine Grained high-entropy alloy and preparation method thereof |
| CN108004492A (en) * | 2017-11-17 | 2018-05-08 | 北京理工大学 | A kind of efficient controlled rolling method of modifying of high-entropy alloy |
| CN111850375A (en) * | 2020-08-07 | 2020-10-30 | 沈阳航空航天大学 | Nano precipitation strengthening type high-strength high-plasticity multi-element alloy and preparation method thereof |
| CN112304478A (en) * | 2020-07-30 | 2021-02-02 | 北京航空航天大学 | Residual stress testing method based on creep profile method |
| CN113564445A (en) * | 2021-08-07 | 2021-10-29 | 中北大学 | Preparation method of high-strength low-cost aluminum-copper-iron-chromium-nickel high-entropy alloy |
| CN115522146A (en) * | 2022-10-10 | 2022-12-27 | 北京科技大学 | High-entropy alloy and thermal mechanical treatment method thereof |
| CN115717224A (en) * | 2022-12-27 | 2023-02-28 | 南京工程学院 | Heat treatment method for improving performance of high-entropy alloy |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893184A (en) * | 2017-11-08 | 2018-04-10 | 太原理工大学 | A kind of nanometer Ultra-fine Grained high-entropy alloy and preparation method thereof |
| CN107893184B (en) * | 2017-11-08 | 2019-04-16 | 太原理工大学 | A kind of nanometer of Ultra-fine Grained high-entropy alloy and preparation method thereof |
| CN108004492A (en) * | 2017-11-17 | 2018-05-08 | 北京理工大学 | A kind of efficient controlled rolling method of modifying of high-entropy alloy |
| CN112304478A (en) * | 2020-07-30 | 2021-02-02 | 北京航空航天大学 | Residual stress testing method based on creep profile method |
| CN112304478B (en) * | 2020-07-30 | 2021-09-28 | 北京航空航天大学 | Residual stress testing method based on creep profile method |
| CN111850375A (en) * | 2020-08-07 | 2020-10-30 | 沈阳航空航天大学 | Nano precipitation strengthening type high-strength high-plasticity multi-element alloy and preparation method thereof |
| CN113564445A (en) * | 2021-08-07 | 2021-10-29 | 中北大学 | Preparation method of high-strength low-cost aluminum-copper-iron-chromium-nickel high-entropy alloy |
| CN115522146A (en) * | 2022-10-10 | 2022-12-27 | 北京科技大学 | High-entropy alloy and thermal mechanical treatment method thereof |
| CN115522146B (en) * | 2022-10-10 | 2023-11-07 | 北京科技大学 | High-entropy alloy and thermo-mechanical treatment method thereof |
| CN115717224A (en) * | 2022-12-27 | 2023-02-28 | 南京工程学院 | Heat treatment method for improving performance of high-entropy alloy |
| CN115717224B (en) * | 2022-12-27 | 2024-01-30 | 南京工程学院 | Heat treatment method for improving high-entropy alloy performance |
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Application publication date: 20170822 Assignee: Shigatuobo clean power Rugao Co.,Ltd. Assignor: NANJING INSTITUTE OF TECHNOLOGY Contract record no.: X2022990000223 Denomination of invention: A method for improving the strength of single-phase high entropy alloy by heat treatment combined with plastic deformation Granted publication date: 20190305 License type: Exclusive License Record date: 20220425 |
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