CN105331911B - A kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability - Google Patents
A kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability Download PDFInfo
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- CN105331911B CN105331911B CN201510861466.5A CN201510861466A CN105331911B CN 105331911 B CN105331911 B CN 105331911B CN 201510861466 A CN201510861466 A CN 201510861466A CN 105331911 B CN105331911 B CN 105331911B
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Abstract
The present invention provides a kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability, magnesium alloy sample is reduced to after ultralow temperature with liquid nitrogen according to certain cooling rate and carries out magnetic field processing under permanent low temperature, then the held for some time under permanent low temperature, then, it is returned to certain programming rate after room temperature and heats to temperature, tempering insulation time is after with being furnace-cooled to room temperature；Reduction magnesium alloy basal plane texture improves magnesium alloy temperature-room type plasticity processing characteristics to realize when the magnetic field compounding method of the invention using under special subzero treatment and deep cooling, particularly deep cooling and magnetic coupling effect, with low, the significant advantage of effect of input.
Description
Technical field
The present invention relates to the method for improving magnesium alloy plastic deformation ability, it is related specifically to a kind of magnesium alloy plasticity that improves and adds
The deep cooling magnetic field processing method of work performance, category new material processing preparing technical field.
Background technology
Magnesium and magnesium alloy become the metal of most light weight during current structural timber is applied with its good combination property
One of, its density is smaller, and specific strength, specific stiffness, elastic modelling quantity are all higher, thermal conductivity, damping shock absorption and electromagnetic shielding etc.
Performance comparision is superior, is widely used in the industrial production.
Because the crystal structure of magnesium alloy is mainly close-packed hexagonal, most common slip system is a/3<11-20>Bai Shi vectors
Basal slip system ({ 0001 }<11-20>) and Prismatic slip system ({ 1-100 }<11-20>), basal slip provides 3 geometry and slided
System is moved, wherein only 2 independent slip modes；Prismatic slip system is difficult to start at normal temperatures, so magnesium alloy is in, low temperature
And plasticity at room temperature, processing characteristics and forming property are all very poor, seriously limit its application.
Therefore, people do a lot of work in terms of magnesium alloy temperature-room type plasticity is improved, and these work mainly pass through addition
Alloying element, change processing mode etc. to obtain the magnesium alloy deformation material of weak basal plane texture, to improve its temperature-room type plasticity, application number
One kind is provided using hot extrusion processing preparation with high-temperature-room type plasticity magnesium alloy sheet material for CN200810058278.9 patent
Method, hot extrusion is carried out using the extrusion die with special shape die hole and prepares magnesium alloy plate, it is this have above and below
The die hole of dissymmetrical structure can produce shearing stress in magnesium alloy plate hot extrusion process, be conducive to magnesium alloy to be pressed through in hot extrusion
Shear plasticity deformation is produced in journey so that the magnesium alloy plate after hot extrusion has relatively low { 0002 } the basal plane texture of intensity, by
This improves the temperature-room type plasticity of magnesium alloy plate, and Application No. CN200910011111.1 patent is directed to current magnesium alloy plate
There is provided a kind of weak basal plane texture and low each to different for the shortcoming that the temperature-room type plasticity of presence is poor, anisotropy is big, strain hardening exponent is low
Property have room temperature formability novel magnesium alloy composition and its sheet material prepare hot rolling technology, the technique prepare Mg-Zn-RE
Magnesium alloy plate has weak basal plane texture, high strain hardening exponent and a low anisotropy factor, and room temperature elongation 30~
45%, wherein be respectively transversely 30~40% and 35~46% with longitudinal direction, the weak basal plane texture obtained by these methods
Although magnesium alloy deformation material is with higher temperature-room type plasticity, its intensity is very low, yield strength<160MPa, tensile strength<
230MPa, not only far below industrial widely used aluminum alloy plate materials, and less than industrial (pair rolling or extruding)
AZ31 magnesium alloy plate (yield strengths>180MPa, tensile strength>260MPa), the magnesium of this weak basal plane texture is greatly reduced
The competitiveness of alloy deformation material, and limit its extensive use.
This seminar early stage patent research Application No. CN201310686562.1 patent provides a kind of raising aluminium base
The method of composite plastic deformation ability, this method has referred primarily to shadow of the magnetic field to plastic deformation capacity of aluminum matrix composite
Ring；Inventor recent studies have shown that, for magnesium and magnesium alloy materials, in the process and in ultra low temperature of particularly quickly cooling
Lower application magnetic field, can make the crystal grain of magnesium and alloy occur orientation and rotate, the effect can make the yield strength of magnesium alloy and resist
Tensile strength and extension property are improved, particularly under ultra low temperature, for paramagnetic material as magnesium alloy, are surpassed in certain
Under cryogenic conditions, apply magnetic field and effect is remarkably promoted to the texture of magnesium alloy, because magnetic anisotropy crystal during externally-applied magnetic field
Acted in magnetic field by magnetic torque, when the magnetized direction of crystal and magnetic direction are not parallel, crystal can be made to rotate shape
Into texture, the present invention realizes the purpose for weakening magnesium alloy basal plane texture by integrated use deep cooling and the action effect in magnetic field, carries
A kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability is gone out.
The content of the invention
The present invention provides a kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability, i.e., by magnesium alloy sample
It is reduced to liquid nitrogen according to certain cooling rate after ultralow temperature and carries out magnetic field processing under permanent low temperature, is then incubated one under permanent low temperature
Fix time, then, be returned to certain programming rate after room temperature and heat to temperature, tempering insulation time arrive after with
It is furnace-cooled to room temperature；The present invention utilizes the magnetic field compounding method under special subzero treatment and deep cooling, particularly deep cooling and magnetic
Reduction magnesium alloy basal plane texture improves magnesium alloy temperature-room type plasticity processing characteristics to realize during the coupling of field.
The purpose of the present invention is achieved through the following technical solutions：
A kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability, it is characterised in that：First by magnesium alloy
Specimen temperature is reduced to -140 DEG C~-196 DEG C of ultralow temperature with liquid nitrogen by sample according to certain cooling rate, then -140
DEG C~the interior externally-applied magnetic field processing carried out under permanent low temperature of -196 DEG C of temperature ranges, again in -140 DEG C~-196 DEG C temperature after the processing of magnetic field
Carry out being incubated 12~36h under permanent low temperature in the range of degree, then, in the method for heating using microwave by magnesium alloy sample with certain heating
Speed heat temperature raising is returned to after room temperature to reheat to be warming up to after 176 DEG C of temperature and is incubated, and is tempered the 4 hours time of insulation,
Finally by magnesium alloy sample with room temperature is furnace-cooled to, that is, complete the deep cooling magnetic field processing of sample.
Need special instruction processing procedure be characterized in：
1) in the temperature-fall period of subzero treatment, magnesium alloy sample liquid nitrogen cooling to -140 DEG C~-196 DEG C of ultralow temperature mistake
Cooling rate in journey is using cooling rate stage by stage：From room temperature be reduced to -100 DEG C during cooling rate be 10 DEG C/
min；From -100 DEG C be cooled to -140 DEG C during cooling rate be 5 DEG C/min；Temperature is less than the cooling rate after -140 DEG C
For 1 DEG C/min, such cooling rate just can guarantee that the micro-structural of magnesium alloy changes to the direction that material plasticity is improved.
2) deep cooling and magnetic field processing procedure, i.e., described is carried out in -140 DEG C~-196 DEG C temperature ranges under permanent low temperature
Magnetic field is handled, and research shows, applies magnetic field processing in the temperature range, is had clearly to the action effect for improving magnetic field
Effect；Meanwhile, the magnetic field used can be direct current steady strong magnetic field, and magnetic field intensity is 1~10T, applies magnetic field processing
Time 10s~500s；The magnetic field used can also be impulse magnetic field, and magnetic field intensity is 1~10T, the pulse continuously applied
Number 10~200.
3) after deep cooling and magnetic field processing terminate, magnesium alloy sample wants fast temperature rising to room temperature, and the carry out temper that heats up,
To be rapidly heated, use the method for heating using microwave by magnesium alloy sample with 10 DEG C/min programming rate be returned to after room temperature again with
5 DEG C/min programming rate heats to 176 DEG C of temperature, after being then incubated 4 hours at 176 DEG C, terminates at tempering
Reason, magnesium alloy sample cools to room temperature with the furnace, that is, completes the processing of the inventive method.
It is an advantage of the invention that：The present invention can be achieved to improve its temperature-room type plasticity processability while improving magnesium alloy strength
Can, the plastic working of achievable magnesium alloy at ambient temperature；Method proposed by the present invention, relative to not controlling temperature-fall period
Subzero treatment, low-temperature process do not apply magnetic field, the draftability risen again with temper to material for the speed that do not control to rise again
There can be remarkable effect, specific data target has detailed comparative analysis in a specific embodiment.
Embodiment
The invention will be further elaborated with reference to embodiments；Embodiment is merely to illustrate the present invention, rather than with
Any mode limits the present invention.
Embodiment one
Choose AZ31 magnesium alloys (Al 3.19%, Zn0.81%, Mn0.334%, surplus are Mg) sheet material by wire cutting into
45mm standard pellet tensile sample is comparative descriptions using the present invention effect, to the standard pellet tensile sample without
Cross and tensile property test is carried out in the case of any processing, as a comparison case 1, its result is as follows：Elongation percentage 7.5%, tension is strong
Spend 220Mpa, yield strength 160MPa；Remaining sample carries out deep cooling magnetic field by the method for the present invention before tension test and returned
The parameter of fire processing, processing procedure and use is as follows.
First magnesium alloy sample is carried out being cooled to -145 DEG C with liquid nitrogen according to the cooling rate of setting, i.e., from room temperature reduction
Be 10 DEG C/min to cooling rate during -100 DEG C, from -100 DEG C be cooled to -140 DEG C during cooling rate be 5 DEG C/
Min, it is 1 DEG C/min that temperature, which is less than the cooling rate after -140 DEG C, is down to steady temperature after -145 DEG C, permanent low temperature is then carried out again
Under externally-applied magnetic field processing, the magnetic field direct current steady strong magnetic field used, magnetic field intensity is 1T, apply magnetic field processing time
200s, is incubated 12h under the permanent low temperature of progress at -145 DEG C again after the processing of magnetic field, then, is replied with 10 DEG C/min programming rate
176 DEG C of temperature is heated to 5 DEG C/min programming rate again after to room temperature, then 4 hours are incubated at 176 DEG C
Afterwards, temper is terminated, magnesium alloy sample cools to room temperature, i.e. completion with the furnace and handled.
More than handle after, to sample carry out tension test, as a result for：Elongation percentage 10.3%, tensile strength 254Mpa,
Yield strength 179MPa；The result shows that compared with comparative example 1, elongation percentage improves 37.5%, and tensile strength is improved
15.6%, yield strength improves 11.7%.
Embodiment two
Choose AZ31 magnesium alloys (Al 3.19%, Zn0.81%, Mn0.334%, surplus are Mg) sheet material by wire cutting into
45mm standard pellet tensile sample is comparative descriptions using the present invention effect, to the standard pellet tensile sample without
Cross and tensile property test is carried out in the case of any processing, as a comparison case 1, its result is as follows：Elongation percentage 7.5%, tension is strong
Spend 220Mpa, yield strength 160MPa；Remaining sample carries out deep cooling magnetic field by the method for the present invention before tension test and returned
The parameter of fire processing, processing procedure and use is as follows.
First magnesium alloy sample is carried out being cooled to -160 DEG C with liquid nitrogen according to the cooling rate of setting, i.e., from room temperature reduction
Be 10 DEG C/min to cooling rate during -100 DEG C, from -100 DEG C be cooled to -140 DEG C during cooling rate be 5 DEG C/
Min, it is 1 DEG C/min that temperature, which is less than the cooling rate after -140 DEG C, is down to steady temperature after -160 DEG C, permanent low temperature is then carried out again
Under externally-applied magnetic field processing, the magnetic field direct current steady strong magnetic field used, magnetic field intensity is 10T, apply magnetic field processing time
100s, is incubated 24h under the permanent low temperature of progress at -160 DEG C again after the processing of magnetic field, then, is replied with 10 DEG C/min programming rate
176 DEG C of temperature is heated to 5 DEG C/min programming rate again after to room temperature, then 4 hours are incubated at 176 DEG C
Afterwards, temper is terminated, magnesium alloy sample cools to room temperature, i.e. completion with the furnace and handled.
More than handle after, carry out tension test, as a result for：Elongation percentage 10.2%, tensile strength 256Mpa, surrender is strong
Spend 180MPa；The result shows that compared with comparative example 1 elongation percentage improves 36.5%, and tensile strength improves 16.6%, surrender
Intensity improves 12.7%.
Embodiment three
Choose AZ31 magnesium alloys (Al 3.19%, Zn0.81%, Mn0.334%, surplus are Mg) sheet material by wire cutting into
45mm standard pellet tensile sample is comparative descriptions using the present invention effect, to the standard pellet tensile sample without
Cross and tensile property test is carried out in the case of any processing, as a comparison case 1, its result is as follows：Elongation percentage 7.5%, tension is strong
Spend 220Mpa, yield strength 160MPa；Remaining sample carries out deep cooling magnetic field by the method for the present invention before tension test and returned
The parameter of fire processing, processing procedure and use is as follows.
First magnesium alloy sample is carried out being cooled to -190 DEG C with liquid nitrogen according to the cooling rate of setting, i.e., from room temperature reduction
Be 10 DEG C/min to cooling rate during -100 DEG C, from -100 DEG C be cooled to -140 DEG C during cooling rate be 5 DEG C/
Min, it is 1 DEG C/min that temperature, which is less than the cooling rate after -140 DEG C, is down to steady temperature after -190 DEG C, permanent low temperature is then carried out again
Under externally-applied magnetic field processing, use impulse magnetic field, magnetic field intensity is 2T, the pulse number continuously applied 30, magnetic
12h is incubated under the permanent low temperature of progress at -190 DEG C again after the processing of field, then, is returned to 10 DEG C/min programming rate after room temperature
176 DEG C of temperature is heated to 5 DEG C/min programming rate again, after being then incubated 4 hours at 176 DEG C, terminated back
Fire processing, magnesium alloy sample cools to room temperature, i.e. completion with the furnace and handled.
More than handle after, carry out tension test, as a result for：Elongation percentage 10.9%, tensile strength 258Mpa, surrender is strong
Spend 180MPa；The result shows that compared with comparative example 1 elongation percentage improves 45.8%, and tensile strength improves 17.4%, surrender
Intensity improves 12.6%.
Example IV
Choose AZ31 magnesium alloys (Al 3.19%, Zn0.81%, Mn0.334%, surplus are Mg) sheet material by wire cutting into
45mm standard pellet tensile sample is comparative descriptions using the present invention effect, to the standard pellet tensile sample without
Cross and tensile property test is carried out in the case of any processing, as a comparison case 1, its result is as follows：Elongation percentage 7.5%, tension is strong
Spend 220Mpa, yield strength 160MPa；Remaining sample carries out deep cooling magnetic field by the method for the present invention before tension test and returned
The parameter of fire processing, processing procedure and use is as follows.
First magnesium alloy sample is carried out being cooled to -150 DEG C with liquid nitrogen according to the cooling rate of setting, i.e., from room temperature reduction
Be 10 DEG C/min to cooling rate during -100 DEG C, from -100 DEG C be cooled to -140 DEG C during cooling rate be 5 DEG C/
Min, it is 1 DEG C/min that temperature, which is less than the cooling rate after -140 DEG C, is down to steady temperature after -150 DEG C, is then carried out under permanent low temperature
Externally-applied magnetic field processing, use impulse magnetic field, magnetic field intensity is 8T, the pulse number continuously applied 50, magnetic field
16h is incubated under the permanent low temperature of progress at -150 DEG C again after processing, then, is returned to 10 DEG C/min programming rate after room temperature again
176 DEG C of temperature is heated to 5 DEG C/min programming rate, after being then incubated 4 hours at 176 DEG C, terminates tempering
Processing, magnesium alloy sample cools to room temperature, i.e. completion with the furnace and handled.
More than handle after, carry out tension test, as a result for：Elongation percentage 11.1%, tensile strength 260Mpa, surrender is strong
Spend 179MPa；The result shows that compared with comparative example 1 elongation percentage improves 47.7%, and tensile strength improves 18.6%, surrender
Intensity improves 11.7%.
The deep cooling used in method to illustrate the invention uses the cool-down method and magnetic of different cooling rates stage by stage
Field action and heating drawing process have carried out following comparison example to the common important function of material deformation performance.
Comparative example 2：Using with the identical sample of embodiment 4, do not controlled in the temperature-fall period of the processing of permanent low temperature
Cooling rate, is directly cooled to steady temperature after -150 DEG C by sample, then carries out the externally-applied magnetic field processing under permanent low temperature, is adopted
It is the insulation carried out after the processing of magnetic field with the identical magnetic field parameter of embodiment 4, heating and drawing process parameter and reality
Apply that example 4 is identical, the influence with the permanent low-temperature treatment temperature-fall period of comparative illustration to material property.
More than handle after, carry out tension test, as a result for：Elongation percentage 8.4%, tensile strength 235Mpa, surrender is strong
Spend 168MPa；The result shows that compared with comparative example 1 elongation percentage improves 12%, and tensile strength improves 7%, yield strength
Improve 5%；Compared with the result of embodiment 4, elongation percentage reduces 24%, tensile strength reduction by 9.8%, yield strength reduction
6%；It can be seen that permanent low-temperature treatment temperature-fall period is using stage by stage using different cooling rates to improving material in the present invention
It can play an important role.
Comparative example 3：Using with the identical sample of embodiment 4, the temperature-fall period of permanent low-temperature treatment and insulation using with
The identical method of embodiment 4, difference is not apply magnetic fields in permanent low-temperature process, after soaking time is arrived, and is used
Heat up and be tempered with the identical method of embodiment 4；Magnetic field is applied to material property with coupling under the permanent low temperature of comparative illustration
Effect.
More than handle after, carry out tension test, as a result for：Elongation percentage 8.6%, tensile strength 237Mpa, surrender is strong
Spend 170MPa；The result shows that compared with comparative example 1 elongation percentage improves 15%, and tensile strength improves 8%, yield strength
6% is improved, compared with the result of embodiment 4, elongation percentage reduces 22%, tensile strength reduction by 9%, yield strength reduction
5%, it can be seen that apply magnetic field in permanent low-temperature process in the present invention and played an important role to improving material property.
Comparative example 4：Using with the identical sample of embodiment 4, the cooling of permanent low-temperature treatment and insulating process and perseverance
Under low temperature magnetic field processing all use with the identical method of embodiment 4, difference be permanent low temperature and magnetic field processing after, using this hair
Bright Quick-return is to tensile property test is directly carried out without temper after room temperature, with returning for the comparative illustration present invention
Effect of the fire processing to material property.
More than handle after, carry out tension test, as a result for：Elongation percentage 9.1%, tensile strength 246Mpa, surrender is strong
Spend 174MPa；The result shows that compared with comparative example 1 elongation percentage improves 21%, and tensile strength improves 12%, yield strength
9% is improved, compared with the result of embodiment 4, elongation percentage reduces 18%, tensile strength reduction by 5.6%, yield strength reduction
2.6%, it can be seen that played an important role in the present invention using temper to improving material property.
Comparative example 5：Using with the identical sample of embodiment 4, the cooling of permanent low-temperature treatment and insulating process and perseverance
Under low temperature magnetic field processing all use with the identical method of embodiment 4, after difference is permanent low temperature and magnetic field processing, do not use this
Invention is rapidly heated and is returned to room temperature, but the method risen again using nature be warming up to after room temperature carry out again it is complete with comparative example 4
Exactly the same tempering method for treating, then carries out tensile property test, and room is returned to being rapidly heated for the comparative illustration present invention
Effect of the temperature to material property.
More than handle after, carry out tension test, as a result for：Elongation percentage 9.3%, tensile strength 244Mpa, surrender is strong
Spend 176MPa；The result shows that compared with comparative example 1 elongation percentage improves 24%, and tensile strength improves 11%, yield strength
10% is improved, compared with the result of embodiment 4, elongation percentage reduces 16%, tensile strength reduction by 6.4%, yield strength drop
It is low by 1.7%, it can be seen that be rapidly heated the important function for being returned to room temperature to material property in the present invention.
Embodiment 1-4 and comparative example 1-5 experimental result are shown in Table, from table knowable to Data Comparison, side proposed by the present invention
Method, rises again relative to not controlling the subzero treatment of temperature-fall period, low-temperature process not to apply magnetic field, the speed that do not control to rise again
There is remarkable effect to the tensile property of material with temper.
Tensile Test Results contrast table
Claims (5)
1. a kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability, it is characterised in that：Magnesium alloy is tried first
Temperature is reduced to -140 DEG C~-196 DEG C of ultralow temperature according to certain cooling rate by sample, then in -140 DEG C~-196 DEG C temperature
The magnetic field processing under permanent low temperature is carried out in the range of degree, progress is permanent low in -140 DEG C~-196 DEG C temperature ranges again after the processing of magnetic field
Temperature 12~36h of lower insulation, then, is returned to reheating after room temperature with certain programming rate by magnesium alloy sample and is warming up to tempering
176 DEG C of temperature, tempering insulation time is after 4 hours, by magnesium alloy sample with being furnace-cooled to room temperature.
2. a kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability as claimed in claim 1, its feature exists
In：The ultralow temperature that magnesium alloy sample cools to -140 DEG C~-196 DEG C is to use liquid nitrogen cooling, and cooling rate is used to drop stage by stage
Warm speed：From room temperature be reduced to -100 DEG C during cooling rate be 10 DEG C/min；- 140 DEG C of mistake is cooled to from -100 DEG C
Cooling rate is 5 DEG C/min in journey；It is 1 DEG C/min that temperature, which is less than the cooling rate after -140 DEG C,.
3. a kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability as claimed in claim 1, its feature exists
In：The magnetic field processing under permanent low temperature is carried out in -140 DEG C~-196 DEG C temperature ranges, the magnetic field used is strong for direct current steady
Magnetic field, magnetic field intensity is 1~10T, applies time 10s~500s of magnetic field processing.
4. a kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability as claimed in claim 1, its feature exists
In：The magnetic field processing under permanent low temperature is carried out in -140 DEG C~-196 DEG C temperature ranges, the magnetic field used for impulse magnetic field,
Magnetic field intensity is 1~10T, the pulse number continuously applied 10~200.
5. a kind of deep cooling magnetic field processing method for improving magnesium alloy plastic deformation ability as claimed in claim 1, its feature exists
In：The method of heating using microwave is used to be returned to magnesium alloy sample after room temperature again with 5 DEG C/min with 10 DEG C/min programming rate
Programming rate heat to 176 DEG C of temperature.
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| CN106498322B (en) * | 2016-09-21 | 2019-01-08 | 江苏大学 | A kind of magnetostatic field cryogenic treating process improving copper or copper alloy obdurability |
| CN108330422B (en) * | 2017-01-17 | 2019-10-01 | 沈阳工业大学 | A kind of cryogenic treatment process improving magnesium alloy toughness |
| CN107675053B (en) * | 2017-08-29 | 2019-09-27 | 西安理工大学 | A kind of preparation method of high strength magnesium lithium alloy and its deep cooling intensive treatment |
| CN111235458B (en) * | 2020-02-28 | 2021-06-22 | 江苏大学 | Boron-containing rare earth-containing high-entropy alloy and magnetic field treatment method thereof |
| CN113477711B (en) * | 2021-06-03 | 2023-08-22 | 重庆理工大学 | Preparation method of non-basal plane texture magnesium alloy plate with superfine crystal structure |
| CN114774728B (en) * | 2022-04-13 | 2023-05-12 | 江苏大学 | Wear-resistant aluminum alloy and preparation method thereof |
| CN115323295B (en) * | 2022-08-17 | 2023-02-10 | 华融科创生物科技（天津）有限公司 | Method for preparing magnesium alloy bone nail bar by room-temperature rotary swaging and cryogenic treatment under alternating magnetic field and magnesium alloy bone nail finished product |
| CN115418588B (en) * | 2022-09-15 | 2023-04-14 | 西北工业大学 | Magnetic field deep supercooling treatment method for improving toughness of cobalt-based high-temperature alloy |
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| CN101824585B (en) * | 2010-05-14 | 2012-02-22 | 江苏大学 | Cold treatment method for preparing high-toughness metal-base composite material |
| CN102433524A (en) * | 2011-12-02 | 2012-05-02 | 华南理工大学 | Thermal treatment method for Mg-Sn-based alloy |
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