CN110004341A - The high-intensitive magnesium alloy and preparation method thereof containing rare earth - Google Patents
The high-intensitive magnesium alloy and preparation method thereof containing rare earth Download PDFInfo
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- CN110004341A CN110004341A CN201910357927.3A CN201910357927A CN110004341A CN 110004341 A CN110004341 A CN 110004341A CN 201910357927 A CN201910357927 A CN 201910357927A CN 110004341 A CN110004341 A CN 110004341A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
- B21C29/003—Cooling or heating of work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- 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
- 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
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Abstract
The invention discloses a kind of magnesium alloys and preparation method thereof containing rare earth of high intensity, component content are as follows: Al is 3~8wt%, Ca is 0.5~6.5wt%, Mn is 0.1~1.2wt%, Zn is 1.5~4.5wt%, and Zr is 0.02~2.5wt%, and Nd is 0.05~1.5wt%, Sm is 0.05~1.5wt%, and surplus is Mg and inevitable impurity.The present invention by pure magnesium ingot melt, alloying；Casting is made, carries out solution treatment；Homogenization heat treatment is carried out, using squeezing, carry out ageing treatment after forging technology deformation processing.Its gain effect is: the present invention provides a kind of magnesium alloy with high intensity, and the magnesium alloy materials of many sizes can be gone out by being plastically deformed processing, can satisfy requirement of the components such as automobile to light-weight high-strength material, and that expands magnesium alloy utilizes field.
Description
Technical field
The present invention relates to a kind of magnesium alloy materials and preparation method, more particularly to a kind of magnesium alloy materials containing rare earth and
Preparation method is applied to nonferrous materials technical field.
Background technique
With the raising that material lighting requires, for magnesium alloy because of its lesser density, good machinability is higher
Specific strength, good heat dissipation performance, referred to as " green engineering material ", now increasingly by sphere of learning and manufacture
The concern in industry field, becomes research hotspot.In order to adapt to adapt to lightweight requirements, magnesium alloy answering in the industrial production is improved
With high-intensitive research and development of magnesium alloy has become inevitable development trend.The micromechanism for verifying magnesium alloy Strengthening and Toughening develops high property
Energy, inexpensive novel high-strength magnesium alloy have become one of material science section and industry focus of attention in recent years.
At present for high-strength magnesium alloy research in, CN104233030A disclose invented it is a kind of age-hardenable
Mg-Zn-Al-Cr-Bi-Ca alloy and preparation method thereof has the group of following proportion to be grouped as (wt%): 4%~
10%Zn,
2%~4%Al, 0.1%~0.5%Cr, 0.1%~1.0%Bi, 0.5%~2.0%Ca, surplus Mg.The hair
The bright casting magnesium with aging hardening effect that can obtain relatively thin as-cast structure, high thermal stability and mechanical property closes
Gold.CN105200292A discloses a kind of Mg-Al-Zn alloy and preparation method thereof of high intensity, has the group of following proportion to be grouped
At (wt%):
8.3%~9.7%Al, 0.35%~1.0%Zn, 0.1%~0.8%Mn, 0.1%~1.0%Cu, remaining is magnesium
With inevitable impurity.Alloy mechanical property after using T6 heat treatment is further improved, and tensile strength reaches as high as
240MPa, yield strength are up to 148MPa, and hardness is up to 107HB.It can thus be seen that the magnesium alloy studied at present is strong
Though degree is improved, but still is not able to satisfy the requirement industrialized to high-strength light material.
ZA system magnesium alloy is the more active magnesium alloy of Recent study, and main hardening constituent is Mg32(Al,Zn)49, melt
535 DEG C of point.The main hardening constituent Mg of AZ91D alloy17Al12, compared with AZ91D alloy, ZA system magnesium alloy have higher fusing point and
Thermal stability, thus improve high-temerature creep drag, and have with the comparable casting character of AZ series magnesium alloy, have very strong
Application prospect.But existing magnesium alloy is participated in crystal grain and is not enough refined, and Mg alloy castings are easy to generate shrinkage cavity, segregation, mechanics
Performance is also undesirable, is not able to satisfy requirement of the components such as automobile to light-weight high-strength material, and lead to magnesium alloy utilizes field
It is restricted.
Summary of the invention
In order to solve prior art problem, it is an object of the present invention to overcome the deficiencies of the prior art, and to provide one kind
Mn, Ca is added by changing ingredient and processing technology in the high-intensitive magnesium alloy and preparation method thereof containing rare earth in the magnesium alloy
Reduce crystallite dimension with rare earth element, regulates and controls alloy grain using the synergistic effect of a variety of refinement crystal grain elements, play thin
Brilliant invigoration effect, while passing through manufacturing process of both heat treatment and plastic processing and improving alloy strength, obtain high intensity
Add the magnesium alloy of rare earth element.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of magnesium alloy containing rare earth of high intensity, main component are formed according to following mass percent (%): Al contains
Amount is 3~8wt%, and Ca content is 0.5~6.5wt%, and Mn content is 0.1~1.2wt%, and Zn content is 1.5~4.5wt%,
Zr content be 0.02~2.5wt%, Nd content be 0.05~1.5wt%, Sm content be 0.05~1.5wt%, surplus be Mg and
Inevitable impurity.
It is preferred that above-mentioned Al content is 4.5~6.5wt%.
It is preferred that above-mentioned Ca content is 1.0~4.5wt%.
It is preferred that above-mentioned Mn content is 0.25~1.0wt%.
It is preferred that above-mentioned Zn content is 2.0~3.5wt%.
It is preferred that above-mentioned Zr content is 0.03~1.2wt%.
It is preferred that the content of above-mentioned Nd, Sm are 0.1~1.0wt%.
A kind of preparation method for the magnesium alloy containing rare earth that the present invention is high-intensitive, includes the following steps:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material,
It is 100% calculating with total mass of raw material when feed proportioning, primary raw material ingredient is formed according to following mass percent (%) and carried out
Feed proportioning: Al content is 3~8wt%, and Ca content is 0.5~6.5wt%, and Mn content is 0.1~1.2wt%, and Zn content is
1.5~4.5wt%, Zr content be 0.02~2.5wt%, Nd content be 0.05~1.5wt%, Sm content be 0.05~
1.5wt%, surplus are Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace are not less than 350 DEG C to temperature in crucible
When, open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:(150~350)；It is warming up to 350~
At 450 DEG C, Mg ingot, Zn ingot, Al ingot and Mn ingot is first added；650~720 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot are added
With Nd ingot；Above-mentioned raw materials are added on a small quantity several times, while opening agitating paddle and being stirred；Complete melting sources and alloying
Afterwards, alloy casting is carried out, casting time control alloyage melt superheat degree is higher than at least 40 DEG C of magnesium fusing point, and uses protection in casting
Gas hood protection；Magnesium alloy slab is obtained after casting tissue coagulation；
C. plastic working technique:
Using extrusion-processing technology or forging processing technology, magnesium alloy slab will be prepared in the step b and carries out plasticity
Processing, obtains magnesium alloy profiles；
D. heat treatment process:
The magnesium alloy profiles obtained by plastic processing are subjected to heat treatment process, are obtained using solution treatment and ageing treatment
To the high-intensitive magnesium alloy finished product containing rare earth；Wherein, solid solution temperature is 360~550 DEG C, and the processing time is 4~12 small
When；Aging temperature is 140~300 DEG C, and aging time is 2~100 hours.
As a preferred technical solution of the present invention, the preparation method of the high-intensitive magnesium alloy containing rare earth, step is such as
Under:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material,
It is 100% calculating with total mass of raw material when feed proportioning, primary raw material ingredient is formed according to following mass percent (%) and carried out
Feed proportioning: Al content is 3~8wt%, and Ca content is 0.5~6.5wt%, and Mn content is 0.1~1.2wt%, and Zn content is
1.5~4.5wt%, Zr content be 0.02~2.5wt%, Nd content be 0.05~1.5wt%, Sm content be 0.05~
1.5wt%, surplus are Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace are not less than 350 DEG C to temperature in crucible
When, open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:(150~350)；It is warming up to 350~
At 450 DEG C, Mg ingot, Zn ingot, Al ingot and Mn ingot is first added；650~720 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot are added
With Nd ingot；Above-mentioned raw materials are added on a small quantity several times, while opening agitating paddle and being stirred；Complete melting sources and alloying
Afterwards, alloy casting is carried out, casting time control alloyage melt superheat degree is higher than at least 40 DEG C of magnesium fusing point, and uses protection in casting
Gas hood protection；Magnesium alloy slab is obtained after casting tissue coagulation；
C. plastic working technique:
Using extrusion-processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing, obtains magnesium alloy
Profile, specific embodiment are as follows:
Magnesium alloy slab is subjected to homogenization heat treatment, the homogenization heat treatment process is to be heated to magnesium alloy slab
275~480 DEG C, heat preservation 6~12 hours；Magnesium alloy slab after homogenization heat treatment is squeezed, extrusion ratio is controlled
It is 8~22,5~20mm/s of extrusion speed, squeezing temperature is 175~240 DEG C, and makes magnesium alloy slab drawn straightening processing,
Obtain the extrudate of magnesium-rare earth；
D. heat treatment process:
The magnesium alloy profiles obtained by extrusion process are subjected to heat treatment process, are obtained using solution treatment and ageing treatment
To the high-intensitive magnesium alloy finished product containing rare earth；Wherein, solid solution temperature is 360~510 DEG C, and the processing time is 4~12 small
When；Aging temperature is 220~300 DEG C, and aging time is 2~100 hours.
As another preferred technical solution of the invention, the preparation method of the high-intensitive magnesium alloy containing rare earth, step
It is as follows:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material,
It is 100% calculating with total mass of raw material when feed proportioning, primary raw material ingredient is formed according to following mass percent (%) and carried out
Feed proportioning: Al content is 3~8wt%, and Ca content is 0.5~6.5wt%, and Mn content is 0.1~1.2wt%, and Zn content is
1.5~4.5wt%, Zr content be 0.02~2.5wt%, Nd content be 0.05~1.5wt%, Sm content be 0.05~
1.5wt%, surplus are Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace are not less than 350 DEG C to temperature in crucible
When, open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:(150~350)；It is warming up to 350~
At 450 DEG C, Mg ingot, Zn ingot, Al ingot and Mn ingot is first added；650~720 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot are added
With Nd ingot；Above-mentioned raw materials are added on a small quantity several times, while opening agitating paddle and being stirred；Complete melting sources and alloying
Afterwards, alloy casting is carried out, casting time control alloyage melt superheat degree is higher than at least 40 DEG C of magnesium fusing point, and uses protection in casting
Gas hood protection；Magnesium alloy slab is obtained after casting tissue coagulation；
C. plastic working technique:
Using forging processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing, obtains magnesium alloy
Profile, specific embodiment are as follows:
Magnesium alloy slab is subjected to homogenization heat treatment, the homogenization heat treatment process is to be heated to magnesium alloy slab
300~480 DEG C, heat preservation 6~12 hours；Magnesium alloy slab after homogenization heat treatment is subjected to isothermal forging, forging temperature
Degree is 325~450 DEG C, forges 2~16 passages；Sample is fetched into whole forging processes for the first time out of heating furnace to be terminated to be no more than
50s, wherein two passages of every forging, are put into furnace annealing at least 10min, finally obtain the forging profile of magnesium-rare earth；
D. heat treatment process:
The magnesium alloy profiles obtained by extrusion process are subjected to heat treatment process, are obtained using solution treatment and ageing treatment
To the high-intensitive magnesium alloy finished product containing rare earth；Wherein, solid solution temperature is 450~550 DEG C, and the processing time is 4~12 small
When；Aging temperature is 140~280 DEG C, and aging time is 2~100 hours.
Magnesium alloy slab of the present invention carries out plastic processing plastic processing, by magnesium alloy since it is with close-packed hexagonal structure,
Slip system is less, therefore its plastic deformation ability is poor, is utilized heat dissipation magnesium alloy preferably, plastic deformation ability
Raising be a Research Points.Technology of Plastic Processing common at present has hydrogenation treatment, electro plasticity processing, large plastometric set three
Big method.Magnesium alloy of the present invention is using extrusion process or forging processing.
Wherein, extrusion process is to refine crystal grain under the action of three-dimensional extruding force, improves its plastic deformation ability.It will be above-mentioned
The casting of step preparation carries out homogenization heat treatment, and Homogenization Treatments process is that casting is heated to 275~425 DEG C, heat preservation 6
~12 hours；Sample after heat treatment is squeezed, extrusion ratio is 8~22,5~20mm/s of extrusion speed, and squeezing temperature is
175~225 DEG C, and drawn alignment is handled, and can obtain the hot extruded shapes that diameter is 20~50mm magnesium-rare earth.
Wherein, forging be produce high quality wrought magnesium alloy important process, magnesium alloy can be forged into different sizes and
The forging of shape has higher mechanical property and lower mechanics cost.Casting is subjected to homogenization heat treatment, at homogenization
Reason process is that casting is heated to 300~450 DEG C, heat preservation 6~12 hours；Gained alloy is subjected to isothermal forging, forging temperature
It is 325~450 DEG C, forges 2~16 passages.Sample is fetched into experiment out of heating furnace terminates overall process no more than 50s, wherein often
Two passages are forged, furnace annealing 10min is put into, wait the hot extruded shapes for obtaining magnesium-rare earth.
Sample Jing Guo extrusion process is carried out heat treatment process by the present invention, and magnesium alloy heat treatment is mainly with T5 and T6
It is main.T5 is artificial aging, and most magnesium alloys are insensitive to natrual ageing, and part magnesium alloy is after casting or shaping
Artificial aging is directly carried out without solution treatment, this can eliminate the stress of workpiece.T6 is artificial aging after solution treatment,
The yield point of alloy usually can be improved in this technique.Carrying out T6 processing is that the supersaturated solid solution that solution treatment obtains is in people
It decomposes during working hour effect and the second phase is precipitated.
The present invention compared with prior art, has following obvious prominent substantive distinguishing features and remarkable advantage:
1. high-intensitive magnesium-rare earth of the invention, due to rare earth element and other alloys member added with specific components
Element, refined crystalline strengthening effect are significantly stronger than traditional magnesium alloy；
2. the magnesium alloy that high-intensitive magnesium alloy preparation process of the invention goes out many sizes by being plastically deformed processing
Material obtains the magnesium alloy that high heat dispersion has both mechanical property and is made it have by the means of forging, extruding and heat treatment
Higher-strength and excellent plasticity can satisfy requirement of the components such as automobile to light-weight high-strength material, expands magnesium alloy
Utilize field；
3. the technique of the preparation method of high-intensitive magnesium-rare earth of the invention requires simply, being able to satisfy industrialized production is needed
It wants, and can reduce the shrinkage cavity of Mg alloy castings, segregation, greatly improve its mechanical property, be very suitable for being widely popularized.
Specific embodiment
Above scheme is described further below in conjunction with specific implementation example, the preferred embodiment of the present invention is described in detail such as
Under:
Embodiment one:
In the present embodiment, a kind of magnesium alloy containing rare earth of high intensity, main component is according to following mass percent
(%) composition: Al content 3.5wt%, Ca content is 4.5wt%, and Mn content is 0.5wt%, and Zn content is 3.0wt%, and Zr contains
Amount is 0.1wt%, and Nd content is 0.9wt%, and Sm content is 0.5wt%, and surplus is Mg and inevitable impurity.
In the present embodiment, a kind of preparation method of the magnesium alloy containing rare earth of the present embodiment high intensity, steps are as follows:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material,
It is 100% calculating with total mass of raw material when feed proportioning, primary raw material ingredient is formed according to following mass percent (%) and carried out
Feed proportioning: Al content 3.5wt%, Ca content is 4.5wt%, and Mn content is 0.5wt%, and Zn content is 3.0wt%, and Zr contains
Amount is 0.1wt%, and Nd content is 0.9wt%, and Sm content is 0.5wt%, and surplus is Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace are greater than 350 DEG C to temperature in crucible
When, open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:350；When being warming up to 350 DEG C, first it is added
Mg ingot, Zn ingot, Al ingot and Mn ingot；650 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot and Nd ingot are added；Above-mentioned raw materials point are more
Secondary a small amount of addition, while opening agitating paddle and being stirred；After completing melting sources and alloying, alloy casting, casting are carried out
Time control alloyage melt superheat degree is higher than 40 DEG C of magnesium fusing point, and is protected in casting using protection gas hood；After casting tissue coagulation
Obtain magnesium alloy slab；
C. plastic working technique:
Using extrusion-processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing, obtains magnesium alloy
Profile, specific embodiment are as follows:
Magnesium alloy slab is subjected to homogenization heat treatment, the homogenization heat treatment process is to be heated to magnesium alloy slab
480 DEG C, heat preservation 8 hours；Magnesium alloy slab after homogenization heat treatment is squeezed, control extrusion ratio is 16, is squeezed
Speed 10mm/s, squeezing temperature is 240 DEG C, and makes magnesium alloy slab drawn straightening processing, obtains the rare earth that diameter is 20mm
The extruded bars of magnesium alloy；
D. heat treatment process:
The magnesium alloy profiles obtained by extrusion process are subjected to heat treatment process, are obtained using solution treatment and ageing treatment
To the high-intensitive magnesium alloy finished product containing rare earth；Wherein, solid solution temperature is 510 DEG C, and the processing time is 10 hours；At timeliness
Managing temperature is 220 DEG C, and aging time is 50 hours.
Experimental test and analysis:
Using the magnesium alloy finished product containing rare earth of high intensity manufactured in the present embodiment as sample, material mechanics experiment point is carried out
Analysis, the mechanical property of resulting materials are as follows: tensile strength is 560MPa~595MPa, and yield strength is 515MPa~530MPa,
Elongation percentage is 12.3%~13.6%.
Embodiment two:
The present embodiment is basically the same as the first embodiment, and is particular in that:
In the present embodiment, a kind of magnesium alloy containing rare earth of high intensity, main component is according to following mass percent
(%) composition: Al content 3.5wt%, Ca content is 4.5wt%, and Mn content is 0.5wt%, and Zn content is 3.0wt%, and Zr contains
Amount is 0.1wt%, and Nd content is 0.8wt%, and Sm content is 0.3wt%, and surplus is Mg and inevitable impurity.
In the present embodiment, the preparation method of the magnesium alloy containing rare earth of the present embodiment high intensity, steps are as follows:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material,
It is 100% calculating with total mass of raw material when feed proportioning, primary raw material ingredient is formed according to following mass percent (%) and carried out
Feed proportioning: Al content 3.5wt%, Ca content is 4.5wt%, and Mn content is 0.5wt%, and Zn content is 3.0wt%, and Zr contains
Amount is 0.1wt%, and Nd content is 0.8wt%, and Sm content is 0.3wt%, and surplus is Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace are not less than 350 DEG C to temperature in crucible
When, open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:350；When being warming up to 350 DEG C, first it is added
Mg ingot, Zn ingot, Al ingot and Mn ingot；650 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot and Nd ingot are added；Above-mentioned raw materials point are more
Secondary a small amount of addition, while opening agitating paddle and being stirred；After completing melting sources and alloying, alloy casting, casting are carried out
Time control alloyage melt superheat degree is higher than 40 DEG C of magnesium fusing point, and is protected in casting using protection gas hood；After casting tissue coagulation
Obtain magnesium alloy slab；
C. plastic working technique:
Using forging processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing, obtains magnesium alloy
Profile, specific embodiment are as follows:
Magnesium alloy slab is subjected to homogenization heat treatment, the homogenization heat treatment process is to be heated to magnesium alloy slab
480 DEG C, heat preservation 9 hours；Magnesium alloy slab after homogenization heat treatment is subjected to isothermal forging, forging temperature is 410 DEG C,
Forge 8 passages；Sample is fetched into whole forging processes out of heating furnace for the first time to be terminated to be no more than 50s, wherein every forging twice
It is secondary, it is put into furnace annealing 10min, finally obtains the forging profile of magnesium-rare earth；
D. heat treatment process:
The magnesium alloy profiles obtained by extrusion process are subjected to heat treatment process, are obtained using solution treatment and ageing treatment
To the high-intensitive magnesium alloy finished product containing rare earth；Wherein, solid solution temperature is 510 DEG C, and the processing time is 10 hours；At timeliness
Managing temperature is 220 DEG C, and aging time is 50 hours.
Using the magnesium alloy finished product containing rare earth of high intensity manufactured in the present embodiment as sample, material mechanics experiment point is carried out
Analysis, the mechanical property of resulting materials are as follows: tensile strength is 460MPa~495MPa, and yield strength is 420MPa~435MPa,
Elongation percentage is 10.5%~11.7%.
Embodiment three:
The present embodiment is substantially the same as in the previous example, and is particular in that:
In the present embodiment, a kind of magnesium alloy containing rare earth of high intensity, main component is according to following mass percent
(%) composition: Al content 4.5wt%, Ca content is 1.0wt%, and Mn content is 0.25wt%, and Zn content is 2.0wt%, Zr
Content is 0.03wt%, and Nd content is 0.1wt%, and Sm content is 0.1wt%, and surplus is Mg and inevitable impurity.
In the present embodiment, a kind of preparation method of the magnesium alloy containing rare earth of the present embodiment high intensity, steps are as follows:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material,
It is 100% calculating with total mass of raw material when feed proportioning, primary raw material ingredient is formed according to following mass percent (%) and carried out
Feed proportioning: Al content 4.5wt%, Ca content is 1.0wt%, and Mn content is 0.25wt%, and Zn content is 2.0wt%, Zr
Content is 0.03wt%, and Nd content is 0.1wt%, and Sm content is 0.1wt%, and surplus is Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace are greater than 350 DEG C to temperature in crucible
When, open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:150~350；When being warming up to 350 DEG C,
Mg ingot, Zn ingot, Al ingot and Mn ingot is first added；650 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot and Nd ingot are added；Above-mentioned original
Material is a small amount of several times to be added, while being opened agitating paddle and being stirred；After completing melting sources and alloying, carries out alloy and pour
Casting, casting time control alloyage melt superheat degree is higher than 40 DEG C of magnesium fusing point, and is protected in casting using protection gas hood；Casting tissue
Magnesium alloy slab is obtained after solidification；
C. plastic working technique:
Using extrusion-processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing, obtains magnesium alloy
Profile, specific embodiment are as follows:
Magnesium alloy slab is subjected to homogenization heat treatment, the homogenization heat treatment process is to be heated to magnesium alloy slab
275 DEG C, heat preservation 6 hours；Magnesium alloy slab after homogenization heat treatment is squeezed, control extrusion ratio is 8, squeezes speed
5mm/s is spent, squeezing temperature is 175 DEG C, and makes magnesium alloy slab drawn straightening processing, obtains the rare earth magnesium that diameter is 20mm and closes
The extruded bars of gold；
D. heat treatment process:
The magnesium alloy profiles obtained by extrusion process are subjected to heat treatment process, are obtained using solution treatment and ageing treatment
To the high-intensitive magnesium alloy finished product containing rare earth；Wherein, solid solution temperature is 360 DEG C, and the processing time is 4 hours；At timeliness
Managing temperature is 220 DEG C, and aging time is 2 hours.
Experimental test and analysis:
Using the magnesium alloy finished product containing rare earth of high intensity manufactured in the present embodiment as sample, material mechanics experiment point is carried out
Analysis, the mechanical property of resulting materials are as follows: tensile strength is 370MPa~415MPa, and yield strength is 305MPa~320MPa,
Elongation percentage is 9.6%~10.8%.
Example IV:
The present embodiment is substantially the same as in the previous example, and is particular in that:
In the present embodiment, a kind of magnesium alloy containing rare earth of high intensity, main component is according to following mass percent
(%) composition: Al content 6.5wt%, Ca content is 4.5wt%, and Mn content is 1.0wt%, and Zn content is 3.5wt%, and Zr contains
Amount is 1.2wt%, and Nd content is 1.0wt%, and Sm content is 1.0wt%, and surplus is Mg and inevitable impurity.
In the present embodiment, a kind of preparation method of the magnesium alloy containing rare earth of the present embodiment high intensity, steps are as follows:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material,
It is 100% calculating with total mass of raw material when feed proportioning, primary raw material ingredient is formed according to following mass percent (%) and carried out
Feed proportioning: Al content 6.5wt%, Ca content is 4.5wt%, and Mn content is 1.0wt%, and Zn content is 3.5wt%, and Zr contains
Amount is 1.2wt%, and Nd content is 1.0wt%, and Sm content is 1.0wt%, and surplus is Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace are greater than 350 DEG C to temperature in crucible
When, open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:150；When being warming up to 450 DEG C, first it is added
Mg ingot, Zn ingot, Al ingot and Mn ingot；720 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot and Nd ingot are added；Above-mentioned raw materials point are more
Secondary a small amount of addition, while opening agitating paddle and being stirred；After completing melting sources and alloying, alloy casting, casting are carried out
Time control alloyage melt superheat degree is higher than 40 DEG C of magnesium fusing point, and is protected in casting using protection gas hood；After casting tissue coagulation
Obtain magnesium alloy slab；
C. plastic working technique:
Using extrusion-processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing, obtains magnesium alloy
Profile, specific embodiment are as follows:
Magnesium alloy slab is subjected to homogenization heat treatment, the homogenization heat treatment process is to be heated to magnesium alloy slab
480 DEG C, heat preservation 12 hours；Magnesium alloy slab after homogenization heat treatment is squeezed, control extrusion ratio is 22, is squeezed
Speed 20mm/s, squeezing temperature is 240 DEG C, and makes magnesium alloy slab drawn straightening processing, obtains the rare earth that diameter is 50mm
The extruded bars of magnesium alloy；
D. heat treatment process:
The magnesium alloy profiles obtained by extrusion process are subjected to heat treatment process, are obtained using solution treatment and ageing treatment
To the high-intensitive magnesium alloy finished product containing rare earth；Wherein, solid solution temperature is 510 DEG C, and the processing time is 12 hours；At timeliness
Managing temperature is 300 DEG C, and aging time is 100 hours.
Experimental test and analysis:
Using the magnesium alloy finished product containing rare earth of high intensity manufactured in the present embodiment as sample, material mechanics experiment point is carried out
Analysis, the mechanical property of resulting materials are as follows: tensile strength is 580MPa~615MPa, and yield strength is 535MPa~545MPa,
Elongation percentage is 12.8%~14.2%.
Embodiment five:
The present embodiment is substantially the same as in the previous example, and is particular in that:
In the present embodiment, a kind of magnesium alloy containing rare earth of high intensity, main component is according to following mass percent
(%) composition: Al content 4.5wt%, Ca content is 1.0wt%, and Mn content is 0.25wt%, and Zn content is 2.0wt%, Zr
Content is 0.03wt%, and Nd content is 0.1wt%, and Sm content is 0.1wt%, and surplus is Mg and inevitable impurity.
In the present embodiment, a kind of preparation method of the magnesium alloy containing rare earth of the present embodiment high intensity, steps are as follows:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material,
It is 100% calculating with total mass of raw material when feed proportioning, primary raw material ingredient is formed according to following mass percent (%) and carried out
Feed proportioning: Al content 4.5wt%, Ca content is 1.0wt%, and Mn content is 0.25wt%, and Zn content is 2.0wt%, Zr
Content is 0.03wt%, and Nd content is 0.1wt%, and Sm content is 0.1wt%, and surplus is Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace are greater than 350 DEG C to temperature in crucible
When, open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:350；When being warming up to 350 DEG C, first it is added
Mg ingot, Zn ingot, Al ingot and Mn ingot；650 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot and Nd ingot are added；Above-mentioned raw materials point are more
Secondary a small amount of addition, while opening agitating paddle and being stirred；After completing melting sources and alloying, alloy casting, casting are carried out
Time control alloyage melt superheat degree is higher than 40 DEG C of magnesium fusing point, and is protected in casting using protection gas hood；After casting tissue coagulation
Obtain magnesium alloy slab；
C. plastic working technique:
Using forging processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing, obtains magnesium alloy
Profile, specific embodiment are as follows:
Magnesium alloy slab is subjected to homogenization heat treatment, the homogenization heat treatment process is to be heated to magnesium alloy slab
300 DEG C, heat preservation 6 hours；Magnesium alloy slab after homogenization heat treatment is subjected to isothermal forging, forging temperature is 325 DEG C,
Forge 16 passages；Sample is fetched into whole forging processes out of heating furnace for the first time to be terminated to be no more than 50s, wherein every forging twice
It is secondary, it is put into furnace annealing 10min, finally obtains the forging profile of magnesium-rare earth；
D. heat treatment process:
The magnesium alloy profiles obtained by extrusion process are subjected to heat treatment process, are obtained using solution treatment and ageing treatment
To the high-intensitive magnesium alloy finished product containing rare earth；Wherein, solid solution temperature is 450 DEG C, and the processing time is 4 hours；At timeliness
Managing temperature is 140 DEG C, and aging time is 2 hours.
Experimental test and analysis:
Using the magnesium alloy finished product containing rare earth of high intensity manufactured in the present embodiment as sample, material mechanics experiment point is carried out
Analysis, the mechanical property of resulting materials are as follows: tensile strength is 485MPa~520MPa, and yield strength is 435MPa~450MPa,
Elongation percentage is 8.5%~9.7%.
Embodiment six:
The present embodiment is substantially the same as in the previous example, and is particular in that:
In the present embodiment, a kind of magnesium alloy containing rare earth of high intensity, main component is according to following mass percent
(%) composition: Al content 6.5wt%, Ca content is 4.5wt%, and Mn content is 1.0wt%, and Zn content is 3.5wt%, and Zr contains
Amount is 1.2wt%, and Nd content is 1.0wt%, and Sm content is 1.0wt%, and surplus is Mg and inevitable impurity.
In the present embodiment, a kind of preparation method of the magnesium alloy containing rare earth of the present embodiment high intensity, steps are as follows:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material,
It is 100% calculating with total mass of raw material when feed proportioning, primary raw material ingredient is formed according to following mass percent (%) and carried out
Feed proportioning: Al content 6.5wt%, Ca content is 4.5wt%, and Mn content is 1.0wt%, and Zn content is 3.5wt%, and Zr contains
Amount is 1.2wt%, and Nd content is 1.0wt%, and Sm content is 1.0wt%, and surplus is Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace are greater than 350 DEG C to temperature in crucible
When, open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:150；When being warming up to 450 DEG C, first it is added
Mg ingot, Zn ingot, Al ingot and Mn ingot；720 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot and Nd ingot are added；Above-mentioned raw materials point are more
Secondary a small amount of addition, while opening agitating paddle and being stirred；After completing melting sources and alloying, alloy casting, casting are carried out
Time control alloyage melt superheat degree is higher than 40 DEG C of magnesium fusing point, and is protected in casting using protection gas hood；After casting tissue coagulation
Obtain magnesium alloy slab；
C. plastic working technique:
Using forging processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing, obtains magnesium alloy
Profile, specific embodiment are as follows:
Magnesium alloy slab is subjected to homogenization heat treatment, the homogenization heat treatment process is to be heated to magnesium alloy slab
480 DEG C, heat preservation 12 hours；Magnesium alloy slab after homogenization heat treatment is subjected to isothermal forging, forging temperature 450
DEG C, forge 16 passages；Sample is fetched into whole forging processes out of heating furnace for the first time to be terminated to be no more than 50s, wherein every forging
Two passages are put into furnace annealing 10min, finally obtain the forging profile of magnesium-rare earth；
D. heat treatment process:
The magnesium alloy profiles obtained by extrusion process are subjected to heat treatment process, are obtained using solution treatment and ageing treatment
To the high-intensitive magnesium alloy finished product containing rare earth；Wherein, solid solution temperature is 550 DEG C, and the processing time is 12 hours；At timeliness
Managing temperature is 280 DEG C, and aging time is 100 hours.
Experimental test and analysis:
Using the magnesium alloy finished product containing rare earth of high intensity manufactured in the present embodiment as sample, material mechanics experiment point is carried out
Analysis, the mechanical property of resulting materials are as follows: tensile strength is 510MPa~545MPa, and yield strength is 460MPa~475MPa,
Elongation percentage is 7.8%~8.7%.
Comparative example one:
A kind of magnesium-rare earth preparation method, comprising the following steps:
(1) raw material preparation: by weight per distribution ratio calculate, by 5% Al, 3% Ca, 0.5% Mn, 3% Zn,
0.1% Zr, 0.08% Nd, 0.08% Sm, surplus are matched for Mg takes alloy raw material；
(2) alloy melting: melting magnesium ingot first with Mg alloy smelting furnace, when temperature in crucible is greater than 350 DEG C, opens
Open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:350, when being warming up to 350 DEG C, first be added magnesium ingot,
Zinc ingot metal, aluminium ingot and metal Mn, are continuously heating to 650 DEG C, add metal Ca, Zr ingot, Sm ingot and Nd ingot, a small amount of several times to add
Enter, while opening agitating paddle and being stirred；After completing alloying, it is ready for alloy casting, alloy superheat degree is molten higher than magnesium
40 DEG C of point is protected using protection gas hood when casting.
The mechanical property of this comparative example resulting materials is as follows: tensile strength is 185MPa~215MPa, and yield strength is
121MPa~132MPa.
Comparative example two:
A kind of magnesium-rare earth preparation method, comprising the following steps:
(1) raw material preparation: by weight per distribution ratio calculate, by 5% Al, 3% Ca, 0.5% Mn, 3% Zn,
0.1% Zr, 0.08% Nd, 0.08% Sm, surplus are matched for Mg takes alloy raw material；
(2) alloy melting: melting magnesium ingot first with Mg alloy smelting furnace, when temperature in crucible is greater than 350 DEG C, opens
Open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:350, when being warming up to 350 DEG C, first be added magnesium ingot,
Zinc ingot metal, aluminium ingot and metal Mn, are continuously heating to 650 DEG C, add metal Ca, Zr ingot, Sm ingot and Nd ingot, a small amount of several times to add
Enter, while opening agitating paddle and being stirred；After completing alloying, it is ready for alloy casting, alloy superheat degree is molten higher than magnesium
40 DEG C of point is protected using protection gas hood when casting；
(3) above-mentioned as cast condition sample heat treatment process: is subjected to heat treatment process.Solid solution temperature is 520 DEG C, when processing
Between be 8 hours；Aging temperature is 180 DEG C, and aging time is 40 hours.
The mechanical property of resulting materials is as follows: tensile strength be 320MPa~355MPa, yield strength be 150MPa~
170MPa, elongation percentage are 6.3%~7.5%.
Based on the above embodiments with comparative example it is found that the tension of the magnesium-rare earth of high intensity prepared in the above embodiments is strong
Degree, yield strength and elongation percentage mechanical property are substantially better than the magnesium alloy of above-mentioned comparative example preparation.The above embodiment of the present invention system
For the magnesium-rare earth with high intensity, due to rare earth element and other alloying elements added with specific components, fine grain
Invigoration effect is significantly stronger than traditional magnesium alloy.The above embodiment of the present invention provides a kind of with high-intensitive magnesium-rare earth
The technique of preparation method requires simply, to be able to satisfy industrialized production needs, and can reduce the shrinkage cavity of Mg alloy castings, segregation,
Its mechanical property is greatly improved, is very suitable for being widely popularized.
The embodiment of the present invention is illustrated above, but the present invention is not limited to the above embodiments, it can also be according to this hair
The purpose of bright innovation and creation makes a variety of variations, and that does under the Spirit Essence and principle of all technical solutions according to the present invention changes
Become, modification, substitution, combination or simplified, should be equivalent substitute mode, as long as meeting goal of the invention of the invention, as long as not
Away from the technical principle and inventive concept of the high-intensitive magnesium alloy containing rare earth of the invention and preparation method thereof, the present invention is belonged to
Protection scope.
Claims (10)
1. a kind of magnesium alloy containing rare earth of high intensity, which is characterized in that its main component is according to following mass percent (%)
Composition: Al content be 3~8wt%, Ca content be 0.5~6.5wt%, Mn content be 0.1~1.2wt%, Zn content be 1.5~
4.5wt%, Zr content are 0.02~2.5wt%, and Nd content is 0.05~1.5wt%, and Sm content is 0.05~1.5wt%, remaining
Amount is Mg and inevitable impurity.
2. the high-intensitive magnesium alloy containing rare earth according to claim 1, it is characterised in that: Al content is 4.5~
6.5wt%.
3. the high-intensitive magnesium alloy containing rare earth according to claim 1, it is characterised in that: Ca content is 1.0~
4.5wt%.
4. the high-intensitive magnesium alloy containing rare earth according to claim 1, it is characterised in that: Mn content is 0.25~
1.0wt%.
5. the high-intensitive magnesium alloy containing rare earth according to claim 1, it is characterised in that: Zn content is 2.0~
3.5wt%.
6. the high-intensitive magnesium alloy containing rare earth according to claim 1, it is characterised in that: Zr content is 0.03~
1.2wt%.
7. the high-intensitive magnesium alloy containing rare earth according to claim 1, it is characterised in that: the content of Nd, Sm is 0.1~
1.0wt%.
8. the preparation method of the high-intensitive magnesium alloy containing rare earth described in a kind of claim 1, which is characterized in that steps are as follows:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material, in raw material
It is 100% calculating with total mass of raw material when ingredient, primary raw material ingredient forms according to following mass percent (%) and carries out raw material
Ingredient: Al content be 3~8wt%, Ca content be 0.5~6.5wt%, Mn content be 0.1~1.2wt%, Zn content be 1.5~
4.5wt%, Zr content are 0.02~2.5wt%, and Nd content is 0.05~1.5wt%, and Sm content is 0.05~1.5wt%, remaining
Amount is Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace, when temperature in crucible is not less than 350 DEG C,
Open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:(150~350)；It is warming up to 350~450 DEG C
When, Mg ingot, Zn ingot, Al ingot and Mn ingot is first added；650~720 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot and Nd are added
Ingot；Above-mentioned raw materials are added on a small quantity several times, while opening agitating paddle and being stirred；After completing melting sources and alloying, into
Row alloy casting, casting time control alloyage melt superheat degree is higher than at least 40 DEG C of magnesium fusing point, and protection gas hood is used in casting
Protection；Magnesium alloy slab is obtained after casting tissue coagulation；
C. plastic working technique:
Using extrusion-processing technology or forging processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing,
Obtain magnesium alloy profiles；
D. heat treatment process:
The magnesium alloy profiles obtained by plastic processing are subjected to heat treatment process, height is obtained using solution treatment and ageing treatment
The magnesium alloy finished product containing rare earth of intensity；Wherein, solid solution temperature is 360~550 DEG C, and the processing time is 4~12 hours；When
Imitating treatment temperature is 140~300 DEG C, and aging time is 2~100 hours.
9. the preparation method of the high-intensitive magnesium alloy containing rare earth according to claim 8, which is characterized in that steps are as follows:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material, in raw material
It is 100% calculating with total mass of raw material when ingredient, primary raw material ingredient forms according to following mass percent (%) and carries out raw material
Ingredient: Al content be 3~8wt%, Ca content be 0.5~6.5wt%, Mn content be 0.1~1.2wt%, Zn content be 1.5~
4.5wt%, Zr content are 0.02~2.5wt%, and Nd content is 0.05~1.5wt%, and Sm content is 0.05~1.5wt%, remaining
Amount is Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace, when temperature in crucible is not less than 350 DEG C,
Open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:(150~350)；It is warming up to 350~450 DEG C
When, Mg ingot, Zn ingot, Al ingot and Mn ingot is first added；650~720 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot and Nd are added
Ingot；Above-mentioned raw materials are added on a small quantity several times, while opening agitating paddle and being stirred；After completing melting sources and alloying, into
Row alloy casting, casting time control alloyage melt superheat degree is higher than at least 40 DEG C of magnesium fusing point, and protection gas hood is used in casting
Protection；Magnesium alloy slab is obtained after casting tissue coagulation；
C. plastic working technique:
Using extrusion-processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing, obtains magnesium alloy type
Material, specific embodiment are as follows:
Magnesium alloy slab is subjected to homogenization heat treatment, the homogenization heat treatment process is that magnesium alloy slab is heated to 275
~480 DEG C, heat preservation 6~12 hours；Magnesium alloy slab after homogenization heat treatment is squeezed, control extrusion ratio is 8
~22,5~20mm/s of extrusion speed, squeezing temperature is 175~240 DEG C, and makes magnesium alloy slab drawn straightening processing, is obtained
The extrudate of magnesium-rare earth；
D. heat treatment process:
The magnesium alloy profiles obtained by extrusion process are subjected to heat treatment process, height is obtained using solution treatment and ageing treatment
The magnesium alloy finished product containing rare earth of intensity；Wherein, solid solution temperature is 360~510 DEG C, and the processing time is 4~12 hours；When
Imitating treatment temperature is 220~300 DEG C, and aging time is 2~100 hours.
10. the preparation method of the high-intensitive magnesium alloy containing rare earth according to claim 8, which is characterized in that steps are as follows:
A. raw material preparation:
Using pure Mg ingot, pure Al ingot, pure Ca ingot, pure Mn ingot, pure Zn ingot, pure Zr ingot, pure Sm ingot and pure Nd ingot as raw material, in raw material
It is 100% calculating with total mass of raw material when ingredient, primary raw material ingredient forms according to following mass percent (%) and carries out raw material
Ingredient: Al content be 3~8wt%, Ca content be 0.5~6.5wt%, Mn content be 0.1~1.2wt%, Zn content be 1.5~
4.5wt%, Zr content are 0.02~2.5wt%, and Nd content is 0.05~1.5wt%, and Sm content is 0.05~1.5wt%, remaining
Amount is Mg and inevitable impurity；
B. alloy smelting process:
The melting sources that will be prepared in the step a using Mg alloy smelting furnace, when temperature in crucible is not less than 350 DEG C,
Open SF6And CO2Mixed gas, wherein SF6And CO2Mixed volume ratio be 1:(150~350)；It is warming up to 350~450 DEG C
When, Mg ingot, Zn ingot, Al ingot and Mn ingot is first added；650~720 DEG C are continuously heating to, Ca ingot, Zr ingot, Sm ingot and Nd are added
Ingot；Above-mentioned raw materials are added on a small quantity several times, while opening agitating paddle and being stirred；After completing melting sources and alloying, into
Row alloy casting, casting time control alloyage melt superheat degree is higher than at least 40 DEG C of magnesium fusing point, and protection gas hood is used in casting
Protection；Magnesium alloy slab is obtained after casting tissue coagulation；
C. plastic working technique:
Using forging processing technology, magnesium alloy slab will be prepared in the step b and carries out plastic processing, obtains magnesium alloy type
Material, specific embodiment are as follows:
Magnesium alloy slab is subjected to homogenization heat treatment, the homogenization heat treatment process is that magnesium alloy slab is heated to 300
~480 DEG C, heat preservation 6~12 hours；Magnesium alloy slab after homogenization heat treatment is subjected to isothermal forging, forging temperature is
325~450 DEG C, forge 2~16 passages；Sample is fetched into whole forging processes out of heating furnace for the first time to be terminated to be no more than 50s,
Wherein two passages of every forging, are put into furnace annealing at least 10min；Finally obtain the forging profile of magnesium-rare earth；
D. heat treatment process:
The magnesium alloy profiles obtained by extrusion process are subjected to heat treatment process, height is obtained using solution treatment and ageing treatment
The magnesium alloy finished product containing rare earth of intensity；Wherein, solid solution temperature is 450~550 DEG C, and the processing time is 4~12 hours；When
Imitating treatment temperature is 140~280 DEG C, and aging time is 2~100 hours.
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| US20230117724A1 (en) * | 2021-10-14 | 2023-04-20 | Shandong University | Processing technology for inhibiting weld coarse grains of magnesium alloy profiles |
| US11697868B2 (en) * | 2021-10-14 | 2023-07-11 | Shandong University | Processing technology for inhibiting weld coarse grains of magnesium alloy profiles |
| CN115044812A (en) * | 2022-06-17 | 2022-09-13 | 北京机科国创轻量化科学研究院有限公司 | High-elongation microalloyed modified AZ31 magnesium alloy sheet material and preparation method thereof |
| CN115449682A (en) * | 2022-09-28 | 2022-12-09 | 广东汇天航空航天科技有限公司 | Magnesium-based alloy compounded by rare earth and alkaline earth elements and preparation method thereof |
| CN115449682B (en) * | 2022-09-28 | 2024-04-26 | 广东汇天航空航天科技有限公司 | Rare earth and alkaline earth element compounded magnesium-based alloy and preparation method thereof |
| CN116162874A (en) * | 2023-02-17 | 2023-05-26 | 中国科学院长春应用化学研究所 | Deformable magnesium alloy and preparation method thereof |
| CN116555650A (en) * | 2023-05-29 | 2023-08-08 | 中国科学院金属研究所 | High-strength high-toughness deformation flame-retardant magnesium alloy and preparation method and application thereof |
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