CN109097648A - A kind of Mg-Al-Ca-Ce system magnesium alloy and preparation method thereof - Google Patents
A kind of Mg-Al-Ca-Ce system magnesium alloy and preparation method thereof Download PDFInfo
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- CN109097648A CN109097648A CN201811081346.3A CN201811081346A CN109097648A CN 109097648 A CN109097648 A CN 109097648A CN 201811081346 A CN201811081346 A CN 201811081346A CN 109097648 A CN109097648 A CN 109097648A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
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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
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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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
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
Abstract
It is composed of the following components by mass: Al:2.0~6.0% the invention discloses a kind of Mg-Al-Ca-Ce system magnesium alloy and preparation method thereof；Ca:1.0~4.0%；Ce:0.2~2.0%；Remaining is magnesium and inevitable impurity.It uses technical pure magnesium ingot, industrial pure Al, Mg-Ce intermediate alloy for raw material, the magnesium alloy is obtained by melting and extrusion forming.It can get the second phase of extremely tiny crystal grain and disperse under the conditions of magnesium alloy extrusion state of the present invention, tensile yield strength is up to 300MPa, compressive yield strength 260MPa, yield strength tensile pressure ratio is more than 85%, tension and compression asymmetry is low, and elongation percentage is higher, reaches 14% or more, extrusion deformation is had excellent performance, and is a kind of wrought magnesium alloy that comprehensive mechanical property is excellent.
Description
Technical field
The present invention relates to field of magnesium alloy, specially a kind of high-intensitive and high tension and compression symmetry Mg-Al-Ca-Ce system magnesium
Alloy and preparation method thereof.
Background technique
Magnesium alloy has light weight, specific strength and specific stiffness height and good casting character, electromagnetic shielding and damping property
The features such as energy, becomes the metal material that rate of rise is most fast in current industrial products application.It is produced in aerospace, automobile, electronics
The fields such as product, defense military have significant application value and broad prospect of application.Compared with cast magnesium alloy, by squeezing, forging
The wrought magnesium alloy of the plastic molding methods processing such as making, roll has higher intensity, better ductility, can satisfy more
The demand of sample structural member.However, being readily formed in extruding or the operation of rolling strong since magnesium alloy has close-packed hexagonal structure
Basal plane texture causes Mg alloy formed property and plasticity poor, and shows Mechanical Property Anisotropy and tension and compression surrender asymmetry,
This has become the bottleneck problem for hindering wrought magnesium alloy large-scale application.
The most commercial wrought magnesium alloy owner of application will have AZ, AM, ZK system at present.AZ and AM system alloy, it is cheap,
But absolute intensity and yield tensile ratio are lower, using being restricted；ZK system alloy such as ZK60, after extruding yield strength between 240~
250MPa, tensile strength reach 325~340MPa, and elongation percentage generally has stronger deformation texture between 10~12%, close
Golden tension and compression symmetry is lower.Some researches show that the addition of rare earth element ce can excite non-basal slip, become to reach reduction
Shape texture and the purpose for improving alloy property, however, when weakening texture, such as to be obtained only by addition rare earth element significant
Effect, required content of rare earth is often relatively high, thus considerably increases the cost of alloy.In consideration of it, urgently developing a kind of honest and clean
Valence, and intensity is high, tension and compression asymmetry is low, and the synthesis mechanical property with high elongation percentage, excellent extrusion deformation performance
The excellent wrought magnesium alloy of energy.
Summary of the invention
To solve the above-mentioned problems, the purpose of the present invention is to provide high-intensitive and high tension and compression symmetry Mg-Al-Ca-
Ce system magnesium alloy and preparation method thereof.Micro rare earth element ce is added in the present invention during alloy smelting and casting, and
In conjunction with two kinds of alloying elements of Al, Ca, while low cost, the tension and compression symmetry of alloy had both been improved, had been in turn ensured high strong
Degree and preferable plasticity, the alloy are a kind of good novel wrought magnesium alloys of comprehensive performance.
To achieve the goals above, the present invention adopts the following technical scheme:
The present invention provides a kind of high-intensitive and high tension and compression symmetry Mg-Al-Ca-Ce system magnesium alloy, the magnesium alloys
It is composed of the following components by mass: Al:2.0~6.0%；Ca:1.0~4.0%；Ce:0.2~2.0%；Remaining is for Mg and not
It can avoid impurity, the inevitable impurity content is lower than 1.0wt%.
Preferably, magnesium alloy described above, it is composed of the following components by mass: Al:2.0~5.0%；Ca:2.0~
3.5%；Ce:0.2~1.5%；Remaining is Mg and inevitable impurity, and the inevitable impurity content is lower than
1.0wt%.
It is further preferred that magnesium alloy described above, composed of the following components by mass: Al:2.5~4.5%；Ca:
2.5~3.5%；Ce:0.4~1.0%；Remaining is Mg and inevitable impurity, and the inevitable impurity content is lower than
1.0wt%.
The present invention is using Al, Ca as main alloy element, and wherein the mass percentage of Al is that 2.0~6.0%, Ca is
1.0~4.0%, both elements easily form sheet high-temperature stable phase Al in the magnesium alloy2Ca or Mg2Ca controls alloy
Homogenization, sheet Al2Ca or Mg2Ca gradually becomes micron order fine particle, can play pinning dislocation when being squeezed and deformed, promote
Into the effect of dynamic recrystallization, dispersion-strengthened action is played, and then improves magnesium alloy strength.The study found that in the magnesium alloy, leading to
Crossing addition mass percentage is 0.2~2.0% rare earth element ce, obviously crystal grain can be inhibited to grow up, thinning microstructure, improves casting
Room temperature and mechanical behavior under high temperature etc. can be improved in performance, meanwhile, after Ce atom is dissolved into magnesium matrix, chemistry between atom can be changed
Key, and then the generation of non-basal slip is excited, weaken magnesium alloy deformation texture.Therefore, Mg-Al-Ca-Ce system provided by the invention
Magnesium alloy has higher yield strength and high tension and compression symmetry.
The present invention also provides a kind of preparation sides of high-intensitive and high tension and compression symmetry Mg-Al-Ca-Ce system magnesium alloy
Method, comprising:
It is raw material by technical pure Mg, industrial pure Al, Mg-Ca and Mg-Ce intermediate alloy, passes through melting, casting, homogenization
Processing and extruding obtain.
Preferably, the steps include:
(1) raw material preheating: by technical pure Mg, industrial pure Al, Mg-Ca and Mg-Ce intermediate alloy raw material by content requirement into
Row is put into resistance furnace after weighing, and is preheated 30~35 minutes at 140~160 DEG C；
(2) alloy melting and casting: in mixed gas protected resistance furnace, 680~730 DEG C of heat preservations keep pure Mg all molten
Change, step (1) preheated pure Al, Mg-Ca and Mg-Ce intermediate alloy is then added, keeps the temperature 20 after being warming up to 700~750 DEG C
It~30 minutes, melts, stirs evenly, and remove surface scum completely to alloy element, dropped after standing heat preservation 20~25 minutes
Temperature is to 690~700 DEG C, in mixed gas protected lower casting ingot；
(3) Homogenization Treatments of alloy: by the ingot casting of step (2) cast molding mixed gas protected 460~500 DEG C lower
Heat preservation 4~6 hours, 80 DEG C or more hot water water quenchings；
(4) extrusion forming of alloy: by the ingot casting after step (3) homogenization by turnery processing, removing outer oxide skin,
2h being preheated at 350~450 DEG C in resistance furnace, then the extrusion forming on extruder, is air-cooled to room temperature, speed is 0.1~
5m/min, extrusion ratio are 10:1~90:1.
It is further preferred that raw material presses following quality weighing: Al:2.0~6.0% in step (1)；Ca:1.0~4.0%；
Ce:0.2~2.0%；Remaining is Mg and inevitable impurity, and the inevitable impurity content is lower than 1.0wt%.
It is further preferred that raw material presses following quality weighing: Al:2.0~5.0%；Ca:2.0~3.5%；Ce:0.2~
1.5%；Remaining is Mg and inevitable impurity, and the inevitable impurity content is lower than 1.0wt%.
It is further preferred that raw material presses following quality weighing: Al:2.5~4.5%；Ca:2.5~3.5%；Ce:0.4
~1.0%；Remaining is Mg and inevitable impurity, and the inevitable impurity content is lower than 1.0wt%.
It is further preferred that step (1) preheating temperature is 150 DEG C.
It is further preferred that the mixed gas is CO2And SF6Mixed gas, by volume percentage, CO2Account for 99~
99.5%, SF6Account for 0.5~1.0%.
It is further preferred that the temperature that step (2) pure Mg all melts is 700 DEG C；Pure Al, Mg-Ca and Mg-Ce is added
Holding temperature is 720 DEG C after intermediate alloy.
It is further preferred that holding temperature is 480 DEG C in step (3).
It is further preferred that extrusion speed is 1.5m/min in step (4), extrusion ratio is 30~61, and preferably extrusion ratio is
61。
It is three important factors in extrusion process that the present invention, which squeezes temperature, extrusion speed and extrusion ratio: squeezing temperature liter
Height, crystal grain have the tendency that growing up, and the intensity of alloy is caused to decline.Meanwhile with the raising for squeezing temperature, structural homogenity is mentioned
Height, microstructure evolution harmony of the alloy in deformation process increase, and elongation percentage improves；Increase extrusion ratio, i.e. deformation extent is larger
When, dynamic recrystallization degree becomes larger, and crystal grain is more tiny, and intensity, hardness increase.Meanwhile increasing extrusion ratio, it also will increase to crowded
The loss for pressing equipment, causes the maintenance cost of equipment to increase；Extrusion speed increases, and strain rate increases, the strain energy liter of system
Complete dynamic recrystallization occurs for height, alloy, and performance improves.And when extrusion speed further increases, due to higher strain energy,
Recrystal grain is grown up, alloy strength and elongation percentage decline.
Magnesium alloy of the present invention has comprehensively considered the grain size of alloy, the content of precipitated phase and distribution, production efficiency and cost,
Rationally control squeezes temperature, squeezes when extrusion speed, continues to optimize technological parameter, it is good novel to obtain comprehensive mechanical property
Magnesium alloy.
The present invention also provides the Mg-Al-Ca-Ce system magnesium conjunctions of high intensity and high tension and compression symmetry that the above method is prepared
Gold is in the application in industrial structure material.
Beneficial effects of the present invention
(1) main alloy element Al, Ca is steady with sheet high temperature in as cast condition in Mg-Al-Ca-Ce system of the present invention magnesium alloy
Determine phase Al2Ca or Mg2Ca form exists, after heat treatment, sheet Al2Ca or Mg2Ca gradually becomes micron order fine particle,
Play the role of pinning dislocation when being squeezed and deformed, promotes dynamic recrystallization, dispersion-strengthened action can also be played.Add rare earth member
Plain Ce obviously can inhibit crystal grain to grow up, thus have thinning microstructure, improve casting character, and improve room temperature and mechanical behavior under high temperature
The advantages that, meanwhile, after Ce atom is dissolved into magnesium matrix, chemical bond between atoms can be changed, and then excite the generation of non-basal slip,
Achieve the purpose that weaken magnesium alloy deformation texture.Therefore, the present invention has reached strong under the premise of unobvious increase cost of alloy
The purpose of change.
(2) Mg-Al-Ca-Ce system of the present invention magnesium alloy can get extremely tiny crystal grain and more under the conditions of As-extruded
The second scattered phase, tensile yield strength are more than 85% up to 300MPa, compressive yield strength 260MPa, yield strength tensile pressure ratio,
Tension and compression symmetry is higher, and elongation percentage is higher, reaches 14% or more, and extrusion deformation is had excellent performance, and is a kind of comprehensive mechanical property
The excellent wrought magnesium alloy of energy.
(3) present invention process is simple, and easy to operate and regulation, used equipment such as smelting furnace, extrusion equipment etc. is normal
Common apparatus is advised, thus has portability strong, is easy to the feature of industrial applications etc..
(4) present invention can obtain the wrought magnesium alloy of high-intensitive and high tension and compression symmetry by being squeezed and deformed, and mould
Property is excellent, and elongation percentage is up to 14% or more.
Detailed description of the invention
Fig. 1 is engineering stress-strain curve under 1 magnesium alloy room temperature of the embodiment of the present invention.
Fig. 2 is the As-extruded metallographic structure photo of magnesium alloy of the present invention, wherein (a) representative instance 1, representative instance 2 (b),
(c) representative instance 3.
Fig. 3 is that the As-extruded tissue EBSD of 3 magnesium alloy of the embodiment of the present invention analyzes crystal grain orientation maps and pole figure.
Specific embodiment
Feature of present invention and other correlated characteristics are described in further detail by the following examples, in order to the same industry
The understanding of technical staff:
Embodiment 1:
Mg-Al-Ca-Ce system magnesium alloy ingredient (mass percent) are as follows: Al 4.0%, Ca 3.5%, Ce 0.5%,
Remaining is magnesium and inevitable impurity.
The preparation method of above-mentioned Mg-Al-Ca-Ce system magnesium alloy:
(1) technical pure Mg, industrial pure Al, Mg-Ca, Mg-Ce intermediate alloy first alloy melting and casting: are pressed into component content
It is required that being weighed, and it is put into resistance furnace, is preheated 30 minutes at 150 DEG C；It is being connected with CO2And SF6Mixed gas protected electricity
Pure Mg is heated in resistance furnace, pure Mg is melted all in 680 DEG C of heat preservations, is then added in preheated pure Al, Mg-Ca, Mg-Ce
Between alloy, keep the temperature 30 minutes after being warming up to 700 DEG C, melt, stir evenly, and remove surface scum completely to alloy element,
It stands heat preservation and cools to 690~700 DEG C after twenty minutes, in CO2And SF6Mixed gas protected lower casting ingot； CO2And SF6It is mixed
It closes in gas, by volume percentage, CO2Account for 99%, SF6Account for 1.0%.
(2) Homogenization Treatments of alloy: by the ingot casting of cast molding in CO2And SF6It is hot at mixed gas protected lower 460 DEG C
Processing 6 hours；80 DEG C or more hot water water quenchings.
(3) extrusion forming of alloy: by the ingot casting after homogenization by turnery processing, outer oxide skin is removed, in resistance
2h is preheated in furnace at 420 DEG C, then the extrusion forming on extruder, extrusion speed 1.5m/min, extrusion ratio 61 is air-cooled
To room temperature.
Embodiment 2:
Mg-Al-Ca-Ce system magnesium alloy ingredient (mass percent) are as follows: Al 4.5%, Ca 3.0%, Ce 1.0%,
Remaining is magnesium and inevitable impurity.
The preparation method of above-mentioned Mg-Al-Ca-Ce system magnesium alloy:
(1) technical pure Mg, industrial pure Al, Mg-Ca, Mg-Ce intermediate alloy first alloy melting and casting: are pressed into component content
It is required that being weighed, and it is put into resistance furnace, is preheated 30 minutes at 150 DEG C；It is being connected with CO2And SF6Mixed gas protected electricity
Pure Mg is heated in resistance furnace, pure Mg is melted all in 700 DEG C of heat preservations, is then added in preheated pure Al, Mg-Ca, Mg-Ce
Between alloy, keep the temperature 25 minutes after being warming up to 720 DEG C, melt, stir evenly, and remove surface scum completely to alloy element,
It stands heat preservation and cools to 690~700 DEG C after twenty minutes, in CO2And SF6Mixed gas protected lower casting ingot； CO2And SF6It is mixed
It closes in gas, by volume percentage, CO2Account for 99.5%, SF6Account for 0.5%.
(2) Homogenization Treatments of alloy: by the ingot casting of cast molding in CO2And SF6It is hot at mixed gas protected lower 480 DEG C
Processing 5 hours；80 DEG C or more hot water water quenchings.
(3) extrusion forming of alloy: by the ingot casting after homogenization by turnery processing, outer oxide skin is removed, in resistance
2h is preheated in furnace at 410 DEG C, then the extrusion forming on extruder, extrusion speed 1.5m/min, extrusion ratio 61 is air-cooled
To room temperature.
Embodiment 3:
Mg-Al-Ca-Ce system magnesium alloy ingredient (mass percent) are as follows: Al 5.0%, Ca 2.5%, Ce 0.5%,
Remaining is magnesium and inevitable impurity.
The preparation method of above-mentioned Mg-Al-Ca-Ce system magnesium alloy:
(1) technical pure Mg, industrial pure Al, Mg-Ca, Mg-Ce intermediate alloy first alloy melting and casting: are pressed into component content
It is required that being weighed, and it is put into resistance furnace, is preheated 30 minutes at 150 DEG C；It is being connected with CO2And SF6Mixed gas protected electricity
Pure Mg is heated in resistance furnace, pure Mg is melted all in 730 DEG C of heat preservations, is then added in preheated pure Al, Mg-Ca, Mg-Ce
Between alloy, keep the temperature 30 minutes after being warming up to 750 DEG C, melt, stir evenly, and remove surface scum completely to alloy element,
It stands heat preservation and cools to 690~700 DEG C after twenty minutes, in CO2And SF6Mixed gas protected lower casting ingot；CO2And SF6Mixing
In gas, by volume percentage, CO2Account for 99%, SF6Account for 1.0%.
(2) Homogenization Treatments of alloy: by the ingot casting of cast molding in CO2And SF6It is hot at mixed gas protected lower 500 DEG C
Processing 4 hours；80 DEG C or more hot water water quenchings.
(3) extrusion forming of alloy: by the ingot casting after homogenization by turnery processing, outer oxide skin is removed, in resistance
2h is preheated in furnace at 400 DEG C, then the extrusion forming on extruder, extrusion speed 1.5m/min, extrusion ratio 61 is air-cooled to
Room temperature.
Comparative example 1:
Difference with embodiment 3 is, extrusion ratio 30.
As shown in table 1, embodiment 3 and comparative example 1 are that extrusion ratio is different, all the same of the same race at division of remaining technological parameter
Gold.The mechanical property of both comparisons can be seen that the intensity of embodiment 3 (extrusion ratio 61) and elongation percentage is above comparative example 1
(extrusion ratio 30), this is primarily due to, and big extrusion ratio can be such that dynamic recrystallization degree increases, crystal grain more fine uniform,
Thus intensity and elongation percentage are higher.
Comparative example 2:
The difference from example 2 is that Mg-Al-Ca-Ce system magnesium alloy ingredient (mass percent) are as follows: Al 7%, Ca
For 3.0%, Ce 1.0%, remaining is magnesium and inevitable impurity.
Comparative example 3:
The difference of embodiment 2 is, Mg-Al-Ca-Ce system magnesium alloy ingredient (mass percent) are as follows: Zn 4.5%, Ca
For 3.0%, Ce 1.0%, remaining is magnesium and inevitable impurity.
Comparative example 4:
The difference of embodiment 2 is, Mg-Al-Ca-Ce system magnesium alloy ingredient (mass percent) are as follows: Al 4.5%, Ca
It is 3%, remaining is magnesium and inevitable impurity.
Comparative example 5
The difference from example 2 is that extrusion speed 10m/min.
Comparative example 6
The difference from example 2 is that squeezing temperature is 500 DEG C.
As a result: the room-temperature mechanical property under 1~6 As-extruded of the embodiment of the present invention 1~3 and comparative example is as shown in table 1.
The room-temperature mechanical property of the magnesium alloy materials of the present invention of table 1
As shown in Figure 1, can be seen that alloy yield strength from the load-deformation curve of 1 As-extruded alloy of embodiment and be more than
300MPa, and surrender after can continue to stretch under suitable intensity, elongation percentage is more than 15%, this to raising workpiece safety very
Favorably.
As shown in Fig. 2, the As-extruded microscopic structure from embodiment 1 to embodiment 3, which can be seen that alloy, has occurred dynamic
Recrystallization, uniform small grains, second-phase dispersion distribution.
As shown in figure 3, can be seen that extruded Magnesium Alloy of the present invention still from the distribution of the pole figure of 3 As-extruded alloy of embodiment
For typical basal plane texture, but maximum pole density is 4.65, and texture intensity is weaker, and the c-axis of portion crystal is no longer normal to squeeze
Direction is pressed, starts to deflect to the direction of extrusion, this is primarily due to, and after Ce atom is dissolved into magnesium matrix, chemistry between atom can be changed
Key can excite the generation of non-basal slip in extrusion process used for forming, to achieve the purpose that weaken deformation texture.Therefore, phase
For conventional extruded magnesium alloy, magnesium alloy texture of the present invention obviously weakens, shows in mechanical property, yield strength tensile pressure ratio
Higher, tension and compression symmetry is good.
By embodiment, the result shows that, available intensity height, tension and compression symmetry are good under the conditions of magnesium alloy extrusion state of the present invention,
The wrought magnesium alloy of excellent plasticity is had both simultaneously, and there is good comprehensive mechanical property.
Finally it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not limited to this hair
It is bright, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still
It can modify to technical solution documented by previous embodiment, or part is equivalently replaced.It is all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not to the scope of the present invention
Limitation, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not required to
Make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of high-intensitive and high tension and compression symmetry Mg-Al-Ca-Ce system magnesium alloy, which is characterized in that the magnesium alloy presses matter
Meter is composed of the following components: Al:2.0~6.0%；Ca:1.0~4.0%；Ce:0.2~2.0%；Remaining is Mg and can not keep away
Exempt from impurity, the inevitable impurity content is lower than 1.0wt%.
2. Mg-Al-Ca-Ce system according to claim 1 magnesium alloy, which is characterized in that by mass by following components group
At: Al:2.0~5.0%；Ca:2.0~3.5%；Ce:0.2~1.5%；Remaining be Mg and inevitable impurity, it is described can not
Avoid impurity content lower than 1.0wt%.
3. Mg-Al-Ca-Ce system according to claim 2 magnesium alloy, which is characterized in that by mass by following components group
At: Al:2.5~4.5%；Ca:2.5~3.5%；Ce:0.4~1.0%；Remaining be Mg and inevitable impurity, it is described can not
Avoid impurity content lower than 1.0wt%.
4. a kind of system of the Mg-Al-Ca-Ce system magnesium alloy of claims 1 to 3 any high intensity and high tension and compression symmetry
Preparation Method characterized by comprising
By the pure Mg of raw and semifinished materials industries, industrial pure Al, Mg-Ca and Mg-Ce intermediate alloy by raw material preheating, melting, casting, uniformly
Change processing and squeeze and obtains.
5. the preparation method according to claim 4, which is characterized in that specific steps are as follows:
(1) raw material preheating: technical pure Mg, industrial pure Al, Mg-Ca and Mg-Ce intermediate alloy raw material are claimed by content requirement
Amount, and be put into resistance furnace, it is preheated 30~35 minutes at 140~160 DEG C；
(2) alloy melting and casting: in mixed gas protected resistance furnace, 680~730 DEG C of heat preservations melt pure Mg all,
Then step (1) preheated pure Al, Mg-Ca and Mg-Ce intermediate alloy is added, 20~30 are kept the temperature after being warming up to 700~750 DEG C
Minute, it melts, stirs evenly, and remove surface scum completely to alloy element, cooled to after standing heat preservation 20~25 minutes
690~700 DEG C, in mixed gas protected lower casting ingot；
(3) Homogenization Treatments of alloy: by the ingot casting of step (2) cast molding in mixed gas protected lower 460~500 DEG C of heat preservations
4~6 hours, 80 DEG C or more hot water water quenchings；
(4) extrusion forming of alloy: by the ingot casting after step (3) homogenization by turnery processing, outer oxide skin is removed, in electricity
2h is preheated at 350~450 DEG C in resistance furnace, then the extrusion forming on extruder, be air-cooled to room temperature, extrusion speed is 0.1~5m/
Min, extrusion ratio are 10:1~90:1.
6. preparation method according to claim 5, which is characterized in that raw material presses following quality weighing: Al in step (1):
2.0~6.0%；Ca:1.0~4.0%；Ce:0.2~2.0%；Remaining is Mg and inevitable impurity, described inevitable miscellaneous
Prime element content is lower than 1.0wt%；Preferably raw material presses following quality weighing: Al:2.0~5.0%；Ca:2.0~3.5%；
Ce:0.2~1.5%；Remaining is Mg and inevitable impurity, and the inevitable impurity content is lower than 1.0wt%；Into one
Step is preferably that raw material presses following quality weighing: Al:2.5~4.5%；Ca:2.5~3.5%；Ce:0.4~1.0%；Remaining is Mg
With inevitable impurity, the inevitable impurity content is lower than 1.0wt%.
7. preparation method according to claim 5, which is characterized in that step (1) preheating temperature is 150 DEG C.
8. preparation method according to claim 5, which is characterized in that the mixed gas is CO2And SF6Mixed gas is pressed
Volume percentage, CO2Account for 99~99.5%, SF6Account for 0.5~1.0%.
9. preparation method according to claim 5, which is characterized in that the temperature that step (2) pure Mg all melts is 700
℃；Holding temperature is 720 DEG C after pure Al, Mg-Ca and Mg-Ce intermediate alloy is added；Preferably, holding temperature is in step (3)
480℃；Preferably, extrusion speed is 1.5m/min in step (4), and extrusion ratio is 30~61, and preferably extrusion ratio is 61.
10. the Mg-Al-Ca-Ce system magnesium alloy that any the method for claim 4~9 is prepared is in industrial structure material
Application.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155011A (en) * | 2020-02-21 | 2020-05-15 | 江苏理工学院 | High-performance Mg-Al-Ca magnesium alloy and preparation method thereof |
| CN113913658A (en) * | 2021-10-08 | 2022-01-11 | 成都伍零三科技集团有限公司 | Magnesium-based barrier explosion-proof alloy material and preparation method thereof |
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| CN1965099A (en) * | 2004-06-15 | 2007-05-16 | 株式会社东京大学Tlo | High toughness magnesium-base alloy, drive component using same, and method for producing high toughness magnesium-base alloy material |
| JP2008001921A (en) * | 2006-06-20 | 2008-01-10 | Kyocera Chemical Corp | Magnesium alloy, and oa equipment parts |
| CN105779834A (en) * | 2014-12-17 | 2016-07-20 | 宝山钢铁股份有限公司 | Low-cost high-strength anti-fatigue nonflammable wrought magnesium alloy and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1965099A (en) * | 2004-06-15 | 2007-05-16 | 株式会社东京大学Tlo | High toughness magnesium-base alloy, drive component using same, and method for producing high toughness magnesium-base alloy material |
| JP2008001921A (en) * | 2006-06-20 | 2008-01-10 | Kyocera Chemical Corp | Magnesium alloy, and oa equipment parts |
| CN105779834A (en) * | 2014-12-17 | 2016-07-20 | 宝山钢铁股份有限公司 | Low-cost high-strength anti-fatigue nonflammable wrought magnesium alloy and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155011A (en) * | 2020-02-21 | 2020-05-15 | 江苏理工学院 | High-performance Mg-Al-Ca magnesium alloy and preparation method thereof |
| CN113913658A (en) * | 2021-10-08 | 2022-01-11 | 成都伍零三科技集团有限公司 | Magnesium-based barrier explosion-proof alloy material and preparation method thereof |
| CN113913658B (en) * | 2021-10-08 | 2022-06-10 | 成都伍零三科技集团有限公司 | Magnesium-based barrier explosion-proof alloy material and preparation method thereof |
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