CN109457157A - A kind of magnesium alloy profiles and preparation method thereof - Google Patents
A kind of magnesium alloy profiles and preparation method thereof Download PDFInfo
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- CN109457157A CN109457157A CN201811383057.9A CN201811383057A CN109457157A CN 109457157 A CN109457157 A CN 109457157A CN 201811383057 A CN201811383057 A CN 201811383057A CN 109457157 A CN109457157 A CN 109457157A
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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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- 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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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Abstract
The present invention relates to a kind of magnesium alloy profiles and preparation method thereof, based on mass percentage, the magnesium alloy profiles are composed of the following components: Al 2.5-3.5%, Zn 0.6-1.4%, Mn 0.2-1.0%, V 0.1-0.3%, N 0.05-0.1%, rare earth element 0.5-1.0%, surplus are Mg and inevitable impurity, impurity content≤0.1%；The rare earth element is Sm and Tm, and the molar ratio of the two is (3-4): 1.The present invention is by being adjusted alloying component, content and preparation process, the intensity of AZ31B magnesium alloy greatly improved, its tensile strength has reached 310-350MPa, provide that disproportional acceptance strength (Rp0.2) is 230-280MPa, elongation after fracture >=7%, gained alloy can be used in more harsh operating condition and environment, have a good application prospect.
Description
Technical field
The present invention relates to alloy preparation fields, and in particular to a kind of magnesium alloy profiles and preparation method thereof.
Background technique
Magnesium alloy is the alloy that other elements composition is added based on magnesium.With the small (1.8g/cm of density3Left and right), by force
Degree is high, and elasticity modulus is big, good heat dissipation, and absorb shock resistance is good, absorbs impact load-carrying ability is big, and the corrosive nature of resistance to organic matter and alkali is good etc.
Feature is mainly used for the industrial departments such as Aeronautics and Astronautics, transport, chemical industry, rocket.What use was most wide at present is magnesium alloy, secondly
It is magnesium-manganese alloy and magnesium zinc zircaloy.
By forming technology, magnesium alloy can be divided into cast magnesium alloy and wrought magnesium alloy.Wherein wrought magnesium alloy is compared to casting
Magnesium alloy is made with bigger development potentiality, by the control of material structure, the application of heat treatment process, wrought magnesium alloy can be obtained
Higher intensity, better ductility and more diversified mechanical property are obtained, to meet the application of diversified engineering structure part
Demand.In the prior art mostly with Mg-Al, Mg-Zn or Mg-Al-Zn based on, by adding suitable element or by adjusting work
The mechanical property of skill improvement wrought magnesium alloy.
CN102383013A discloses a kind of wrought magnesium alloy and preparation method thereof, each component in the wrought magnesium alloy
Weight percent are as follows: Al:2.0wt%-4.0wt%；Zn:0.40wt%-1.70wt%；Mn:0.20wt%-0.50wt%；B:
0.05wt%-1.0wt%；Surplus includes Mg, with or without impurity.Wrought magnesium alloy is first subjected to homogenizing annealing processing, so
Wrought magnesium alloy is placed in extrusion die afterwards, is squeezed by extruder, wrought magnesium alloy product is obtained.
CN108070762A discloses a kind of wrought magnesium alloy and preparation method thereof, which contains alloy member
The magnesium elements of plain, inevitable impurity element and surplus；On the basis of the total weight of the wrought magnesium alloy, the alloy member
Element includes: the Al of 3.0-4.0 weight %, Mn the and 0.5-2.5 weight %'s of the Zn of 1.0-2.0 weight %, 0.5-1.0 weight %
Sn.The tensile strength for the wrought magnesium alloy that the formula obtains is not less than 285MPa, and yield strength is not less than 185MPa, and elongation percentage is not
Lower than 15%.
CN102051509A discloses the preparation side of a kind of high-toughness heat-resistant Mg-Al-RE-Mn wrought magnesium alloy and its plate
Method, material component include aluminium, rare earth, manganese, impurity element (silicon, iron, nickel, copper) and magnesium, carry out melting, essence using smelting furnace
Refining, is then cast into ingot casting, at 280-400 DEG C before 370-410 DEG C of progress Homogenization Treatments then water quenching, plastic deformation processing
It squeezed, rolled or extruding+rolling after heat preservation a period of time, high-toughness heat-resistant Mg-Al-RE-Mn deformation magnesium alloy plate is made
Material.
CN108385007A discloses a kind of high performance heat resistant deformed magnesium alloy material and preparation method thereof of low cost,
Chemical component weight percentage are as follows: Zn:4.0-9.0%, Sn:0.5-8%, Cu:0.1-5%, Mn:0.5-2%, remaining for magnesium with
And inevitable impurity.It solves existing high strength heat resistant deformed magnesium alloy material and uses rare earth element and high price alloy member
The problems such as complicated technologies costs such as element, large plastometric set (quick solidification, powder metallurgy etc.) are excessively high.
CN102330006A discloses a kind of wrought magnesium alloy, the weight percent of each component are as follows: Al:6.15wt%-
6.84wt%；Zn:1.05wt%-1.36wt%；Mn:0.20wt%-0.45wt%；Sc:0.50wt%-1.50wt%；Surplus
For Mg.Metamorphism treatment is carried out to wrought magnesium alloy using rare earth Sc, refinement crystal grain can be reached, improve the work of alloy structure
With.
CN103469039A discloses the magnesium-aluminum-zinc series deformation magnesium alloy of a kind of calcic and rare earth samarium, the wrought magnesium alloy
Each component element mass percentage are as follows: Al 5.3-6.0%；Zn is 0.7-1.0%；Ca is 0.4-0.5%；Sm is
0.2-1.5%；Inevitable impurity content≤0.15%；Surplus is Mg, takes each component raw material by said ratio, fusing, salt
Rapid cooling is bathed, obtained alloy spindle homogenizing annealing at 400 DEG C is air-cooled to room temperature；360 DEG C, extrusion ratio 25: 1 carries out hot extrusion
Pressure, obtains the magnesium-aluminum-zinc wrought magnesium alloy of calcic, rare earth samarium.
AZ31B is a kind of wrought magnesium alloy haveing excellent performance, vibration resistance and heat absorption capacity with higher, thus is
Manufacture the ideal material of aircraft wheel hub.It is suitable for manufacture engine gear casing, oil pump and oil pipe, and because in rotation and reciprocal fortune
The inertia force generated in dynamic is smaller and is used to manufacture rocker arm, the movable members such as hatch door and rudder face.AZ31B magnesium alloy is on automobile
Application also very extensively, such as clutch housing, valve deck, gearbox body cylinder head, air conditioner shell.AZ31B magnesium alloy is answered
With relatively broad, but its intensity is poor, and existing AZ31B magnesium alloy tensile strength generally only has 220-250MPa, it is difficult to full
The some harsh operating conditions of foot of requirement under to(for) alloy property, it is therefore necessary to development mechanics better performance product.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of magnesium alloy profiles and preparation method thereof, by alloy
Ingredient, content and preparation process are adjusted, and the intensity of AZ31B magnesium alloy greatly improved, and tensile strength reaches
310-350MPa is, it is specified that disproportional acceptance strength (Rp0.2) is 230-280MPa, elongation after fracture >=7%, and gained alloy is available
In more harsh operating condition and environment, have a good application prospect.
In order to achieve the above objectives, the invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of magnesium alloy profiles, based on mass percentage, the magnesium alloy profiles by
Following components composition:
The rare earth element is Sm and Tm, and the molar ratio of the two is (3-4): 1, surplus is Mg and inevitable impurity.
The each element that the present invention is added is solid-solubilized in α-Mg matrix, due to the elasticity modulus and atom of solute and matrix element
Radius is different, and matrix generates distortion of lattice, increases the resistance of dislocation motion, makes sliding be difficult to carry out, to make alloy solid solution
The intensity and hardness of body increase.Further, since the atomic radius between solute (Zn, Mn, Tm, Al, V and Sm) is different, so that not
Difference, above-mentioned difference form the stress field of variation to the matrix lattice amount of distortion formed with solute, hinder the ability of dislocation
Enhancing, to further improve the intensity of alloy.
In the present invention, the N of part Al, Sm and addition is precipitated in the form of Al-N-Sm compound, and part V and N form V-N
Compound is precipitated, and forms two-phase precipitation, and the two is dispersed in matrix phase.Due to the effect of Tm, precipitated phase and dislocation it
Between form certain angle, to dislocation form stronger " pinning " effect, hinder dislocation and grain boundary, and then produce
Significant invigoration effect.
The essence of hardening constituent dispersion-strengtherning is that the movement of dislocation is hindered using the ultrafine dust of disperse, is existed to improve material
Mechanical property under high temperature.Therefore, have following requirement to dispersion-strengtherning particle: particle size wants (0.01-0.05 μ as small as possible
M), the spacing of particle will reach optimum degree (0.1-0.5 μm), and distribution is uniform in the base.In the present invention, due to the rush of Tm
Into effect, hardening constituent particle realizes in the base to be uniformly distributed.After extrusion process, Al-N-Sm in the hardening constituent of precipitation
The size of compound particle is 0.25-0.5 μm, and the size of V-N compound is generally less than 0.3 μm, is formed match therebetween
It closes, further improves the mechanical property of alloy.
According to the present invention, based on mass percentage, the content of Al is 2.5-3.5% in the magnesium alloy profiles, such as
It can be 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3.0%, 3.1%, 3.2%, 3.3%, 3.4% or 3.5%, and
Point value between above-mentioned numerical value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, based on mass percentage, the content of Zn is 0.6-1.4% in the magnesium alloy profiles, such as
It can be between 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3% or 1.4% and above-mentioned numerical value
Point value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, based on mass percentage, the content of Mn is 0.2-1.0% in the magnesium alloy profiles, such as
It can be between 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1.0% and above-mentioned numerical value
Point value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, based on mass percentage, the content of V is 0.1-0.3% in the magnesium alloy profiles, such as can
To be 0.1%, 0.13%, 0.15%, 0.18%, 0.2%, 0.23%, 0.25%, 0.28% or 0.3% and above-mentioned numerical value
Between point value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, based on mass percentage, the content of N is 0.05-0.1% in the magnesium alloy profiles, such as
It can be the point value between 0.05%, 0.06%, 0.07%, 0.08%, 0.09% or 0.1% and above-mentioned numerical value, be limited to a piece
Width and for concise consideration, the present invention no longer exclusive list.
N element is key component of the invention, and when being free of N element, Al-N-Sm and V-N two-phase cannot generate precipitation.When
When N content is less, precipitated phase is reduced, and the strengthening effect of alloy weakens；When N content excess, the nitrogen content that dissociates increases, alloy
Brittleness increases, and performance is difficult to meet the requirements.
According to the present invention, based on mass percentage, the content of rare earth element is 0.5- in the magnesium alloy profiles
1.0%, such as can be the point value between 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1.0% and above-mentioned numerical value,
As space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, in the rare earth element Sm and Tm molar ratio be (3-4): 1, for example, can be 3:1,3.1:1,
Point value between 3.2:1,3.3:1,3.4:1,3.5:1,3.6:1,3.7:1,3.8:1,3.9:1 or 4:1 and above-mentioned numerical value,
As space is limited and for concise consideration, the present invention no longer exclusive list.
The content of Sm and Tm is particularly important for the present invention, and when Sm too high levels, the second phase of precipitation increases, though
The intensity of right alloy gets a promotion, but plasticity reduces excessively, it is difficult to meet the requirements.When Sm content is too low, Sm is largely dissolved
In the base, it cannot be effectively formed the second phase, the strengthening effect of alloy weakens.Similar, when the too high levels of Tm, part Tm
It is precipitated, inhibition can be generated to the dispersion of hardening constituent particle, and then have an adverse effect to the intensity of alloy.When the content of Tm is insufficient
When, it is bad to the strengthening effect of alloy.
When the content of rare earth element is 0.5-1.0%, and the molar ratio of Sm and Tm is (3-4): when 1, the plasticity of alloy
It meets the requirements, and strengthening effect is best.
According to the present invention, based on mass percentage, Si≤0.05%, Fe≤0.003%, Cu in the magnesium alloy profiles
≤ 0.01%, Ni≤0.001%.
According to the present invention, based on mass percentage, impurity content≤0.1% in the magnesium alloy profiles.
The present invention is extremely stringent to the content requirement of impurity element, when impurity content is excessively high, can drop low-alloyed
Plasticity and toughness make its comprehensive mechanical property be difficult to meet the requirement of national standard.Therefore, impurity content≤0.1% is controlled, into
And the elongation after fracture of alloy is made to be maintained at 7% or more, it is the key that one of of the invention.
Second aspect, the present invention provide a kind of preparation method of magnesium alloy profiles as described in relation to the first aspect, the method
The following steps are included:
(1) Al, Zn, Mn, V, N, Mg and Sm and Tm are added in furnace by formula ratio and carry out melting, cast after melting
It makes, obtains round ingot casting；
(2) the circle ingot casting for obtaining step (1) is added in extruder, is squeezed by mold circle ingot casting, controls mould
The temperature of tool is 450-480 DEG C, after the completion of extruding, obtains the magnesium alloy profiles.
According to the present invention, step (1) V and N is added in the form of VN alloy.
According to the present invention, the temperature of step (1) described melting is 640-650 DEG C, such as can be 640 DEG C, 643 DEG C, 645
DEG C, 648 DEG C or the point value between 650 DEG C and above-mentioned numerical value, as space is limited and for concise consideration, the present invention is no longer poor
It enumerates to the greatest extent.
According to the present invention, the temperature of step (1) described casting is 650-660 DEG C, such as can be 650 DEG C, 652 DEG C, 655
DEG C, 658 DEG C or the point value between 660 DEG C and above-mentioned numerical value, as space is limited and for concise consideration, the present invention is no longer poor
It enumerates to the greatest extent.
According to the present invention, the pressure≤21MPa of step (2) described extruding.
According to the present invention, the speed of step (2) described extruding be 0.2-0.4mm/s, such as can be 0.2mm/s,
0.23mm/s, 0.25mm/s, 0.28mm/s, 0.3mm/s, 0.33mm/s, 0.35mm/s, 0.38mm/s or 0.4mm/s, Yi Jishang
The point value between numerical value is stated, as space is limited and for concise consideration, the present invention no longer exclusive list.
For the prior art during preparing AZ31B magnesium alloy, general control squeezes temperature at 380 DEG C or so, extrusion speed
For 0.5-1mm/s.Due to foring the hardening constituent Al-N-Sm and V-N of precipitation in alloy, the present invention improves temperature when extruding
(450-480 DEG C), after squeezing at such a temperature alloy, above-mentioned precipitation compounds can even dispersion be distributed in matrix
On, tiny alloy structure is obtained, the performance of alloy is improved.
Squeeze can the second phase it is broken, refine the compound of precipitation.The present invention improves to be reduced while squeezing temperature
The speed of extruding, after the speed at 450-480 DEG C with 0.2-0.4mm/s is squeezed, Al-N-Smization in the hardening constituent of precipitation
The size overwhelming majority of polymer beads is between 0.25-0.5 μm, and the size of V-N compound is less than 0.3 μm, therebetween
Cooperation is formed, the mechanical property of alloy is further improved.
As a preferred technical solution, magnesium alloy profiles of the present invention preparation method the following steps are included:
(1) Al, Zn, Mn, V, N, Mg and Sm and Tm are added in furnace by formula ratio, are warming up to 640-650 DEG C and are melted
Refining, wherein V and N is added in the form of VN alloy, is cast, is obtained to gained alloy at 650-660 DEG C after the completion of melting
To circle ingot casting；
(2) the circle ingot casting for obtaining step (1) is added in extruder, is squeezed by mold circle ingot casting, controls mould
The temperature of tool is 450-480 DEG C, and the speed of extruding is 0.2-0.4mm/s, and pressure≤21MPa after the completion of extruding, obtains the magnesium
Alloy profile.
Compared with prior art, the present invention at least has the advantages that
(1) present invention is adjusted alloying component and content on the basis of AZ31B magnesium alloy, prepares technique,
The intensity of alloy greatly improved, tensile strength is 310-350MPa, it is specified that disproportional acceptance strength (Rp0.2) is 230-
280MPa is much higher than AZ31B magnesium alloy.
(2) magnesium alloy profiles intensity prepared by the present invention is high, and elongation after fracture >=7%, plasticity meet national standard, can
For expanding application range in more harsh operating condition and environment.
Specific embodiment
In order to better illustrate the present invention, the technical scheme of the invention is further explained by means of specific implementation.
The present invention provides a kind of magnesium alloy profiles in specific embodiment part, based on mass percentage, the magnesium
Alloy profile is composed of the following components: Al 2.5-3.5%, Zn 0.6-1.4%, Mn 0.2-1.0%, V0.1-0.3%, N
0.05-0.1%, rare earth element 0.5-1.0%, surplus are Mg and inevitable impurity, impurity content≤0.1%.
The rare earth element is Sm and Tm, and the molar ratio of the two is (3-4): 1.
The present invention additionally provides a kind of preparation method of magnesium alloy profiles in specific embodiment part, the method includes
Following steps:
(1) Al, Zn, Mn, V, N, Mg and Sm and Tm are added in furnace by formula ratio, are warming up to 640-650 DEG C and are melted
Refining, wherein V and N is added in the form of VN alloy, is cast, is obtained to gained alloy at 650-660 DEG C after the completion of melting
To circle ingot casting；
(2) the circle ingot casting for obtaining step (1) is added in extruder, is squeezed by mold circle ingot casting, controls mould
The temperature of tool is 450-480 DEG C, and the speed of extruding is 0.2-0.4mm/s, and pressure≤21MPa after the completion of extruding, obtains the magnesium
Alloy profile.
Each element is added in the form of pure ingot or intermediate alloy in step (1) of the present invention, such as V and N are with VN alloy
Form is added, and Mg is added in the form of pure magnesium ingot.
Technological parameter when casting is as shown in table 1:
Table 1
| Casting rod diameter (mm) | Casting temperature (DEG C) | Casting speed (mm/min) | It casts hydraulic pressure (MPa) |
| Φ305 | 650-660 | 70-90 | 0.15-0.20 |
The typical but non-limiting embodiment of the present invention is as follows:
Embodiment 1
A kind of magnesium alloy profiles are present embodiments provided, based on mass percentage, the magnesium alloy profiles are by with the following group
Be grouped as: Al 3%, Zn 1%, Mn 0.6%, V 0.25%, N 0.08%, rare earth element 0.8%, surplus are Mg and can not
The impurity avoided, impurity content≤0.1%.
The rare earth element is Sm and Tm, and the molar ratio of the two is 3.3:1.
Above-mentioned magnesium alloy profiles are prepared in accordance with the following methods:
(1) Al, Zn, Mn, V, N, Mg and Sm and Tm are added in furnace by formula ratio, are warming up to 650 DEG C of progress meltings,
Middle V and N is added in the form of VN alloy, is cast at 660 DEG C to gained alloy after the completion of melting, and round ingot casting is obtained；
(2) the circle ingot casting for obtaining step (1) is added in extruder, is squeezed by mold circle ingot casting, controls mould
The temperature of tool is 465 DEG C, and the speed of extruding is 0.35mm/s, and pressure≤21MPa after the completion of extruding, obtains the magnesium alloy type
Material.
Embodiment 2
A kind of magnesium alloy profiles are present embodiments provided, based on mass percentage, the magnesium alloy profiles are by with the following group
Be grouped as: Al 2.5%, Zn 1.2%, Mn 0.8%, V 0.2%, N 0.1%, rare earth element 1.0%, surplus is for Mg and not
Evitable impurity, impurity content≤0.1%.
The rare earth element is Sm and Tm, and the molar ratio of the two is 3:1.
Above-mentioned magnesium alloy profiles are prepared in accordance with the following methods:
(1) Al, Zn, Mn, V, N, Mg and Sm and Tm are added in furnace by formula ratio, are warming up to 640 DEG C of progress meltings,
Middle V and N is added in the form of VN alloy, is cast at 650 DEG C to gained alloy after the completion of melting, and round ingot casting is obtained；
(2) the circle ingot casting for obtaining step (1) is added in extruder, is squeezed by mold circle ingot casting, controls mould
The temperature of tool is 460 DEG C, and the speed of extruding is 0.4mm/s, and pressure≤21MPa after the completion of extruding, obtains the magnesium alloy type
Material.
Embodiment 3
A kind of magnesium alloy profiles are present embodiments provided, based on mass percentage, the magnesium alloy profiles are by with the following group
Be grouped as: Al 3.5%, Zn 1.4%, Mn 0.45%, V 0.15%, N 0.05%, rare earth element 0.6%, surplus be Mg and
Inevitable impurity, impurity content≤0.1%.
The rare earth element is Sm and Tm, and the molar ratio of the two is 4:1.
Above-mentioned magnesium alloy profiles are prepared in accordance with the following methods:
(1) Al, Zn, Mn, V, N, Mg and Sm and Tm are added in furnace by formula ratio, are warming up to 645 DEG C of progress meltings,
Middle V and N is added in the form of VN alloy, is cast at 655 DEG C to gained alloy after the completion of melting, and round ingot casting is obtained；
(2) the circle ingot casting for obtaining step (1) is added in extruder, is squeezed by mold circle ingot casting, controls mould
The temperature of tool is 450 DEG C, and the speed of extruding is 0.3mm/s, and pressure≤21MPa after the completion of extruding, obtains the magnesium alloy type
Material.
Embodiment 4
A kind of magnesium alloy profiles are present embodiments provided, based on mass percentage, the magnesium alloy profiles are by with the following group
Be grouped as: Al 3.3%, Zn 0.6%, Mn 1.0%, V 0.3%, N 0.09%, rare earth element 0.9%, surplus is for Mg and not
Evitable impurity, impurity content≤0.1%.
The rare earth element is Sm and Tm, and the molar ratio of the two is 3.5:1.
Above-mentioned magnesium alloy profiles are prepared in accordance with the following methods:
(1) Al, Zn, Mn, V, N, Mg and Sm and Tm are added in furnace by formula ratio, are warming up to 640 DEG C of progress meltings,
Middle V and N is added in the form of VN alloy, is cast at 660 DEG C to gained alloy after the completion of melting, and round ingot casting is obtained；
(2) the circle ingot casting for obtaining step (1) is added in extruder, is squeezed by mold circle ingot casting, controls mould
The temperature of tool is 470 DEG C, and the speed of extruding is 0.2mm/s, and pressure≤21MPa after the completion of extruding, obtains the magnesium alloy type
Material.
Embodiment 5
A kind of magnesium alloy profiles are present embodiments provided, based on mass percentage, the magnesium alloy profiles are by with the following group
Be grouped as: Al 2.5%, Zn 0.6%, Mn 0.2%, V 0.1%, N 0.05%, rare earth element 0.5%, surplus is for Mg and not
Evitable impurity, impurity content≤0.1%.
The rare earth element is Sm and Tm, and the molar ratio of the two is 3.7:1.
Above-mentioned magnesium alloy profiles are prepared according to the method in embodiment 1.
Embodiment 6
A kind of magnesium alloy profiles are present embodiments provided, based on mass percentage, the magnesium alloy profiles are by with the following group
Be grouped as: Al 3.5%, Zn 1.3%, Mn 0.4%, V 0.15%, N 0.07%, rare earth element 1.0%, surplus be Mg and
Inevitable impurity, impurity content≤0.1%.
The rare earth element is Sm and Tm, and the molar ratio of the two is 3.2:1.
Above-mentioned magnesium alloy profiles are prepared according to the method in embodiment 1.
Comparative example 1
Compared with Example 1, other than not adding rare earth element (content is substituted by Mg), other components content and preparation
Method is identical with embodiment 1.
Comparative example 2
Compared with Example 1, other than not adding Sm (content is substituted by Mg), other components content and preparation method with
Embodiment 1 is identical.
Comparative example 3
Compared with Example 1, other than not adding Tm (content is substituted by Mg), other components content and preparation method with
Embodiment 1 is identical.
Comparative example 4
Compared with Example 1, other than Sm is replaced with Nd, other components content and preparation method and embodiment 1 are complete
It is exactly the same.
Comparative example 5
Compared with Example 1, other than Tm is replaced with Y, other components content and preparation method and embodiment 1 are completely
It is identical.
Comparative example 6
Compared with Example 1, other than the additive amount of rare earth element is adjusted to 1.5% (molar ratio of Sm and Tm be 3.3:
1), other components content and preparation method are identical with embodiment 1.
Comparative example 7
Compared with Example 1, other than the additive amount of rare earth element is adjusted to 0.3% (molar ratio of Sm and Tm be 3.3:
1), other components content and preparation method are identical with embodiment 1.
Comparative example 8
Compared with Example 1, other than the molar ratio of Sm and Tm is adjusted to 2:1, other components content and preparation method
It is identical with embodiment 1.
Comparative example 9
Compared with Example 1, other than the molar ratio of Sm and Tm is adjusted to 5:1, other components content and preparation method
It is identical with embodiment 1.
Comparative example 10
Compared with Example 1, other than not adding V element (content is substituted by Mg), other components content and preparation side
Method is identical with embodiment 1.
Comparative example 11
Compared with Example 1, other than not adding N element (content is substituted by Mg), other components content and preparation side
Method is identical with embodiment 1.
Comparative example 12
Compared with Example 1, other than the content of N element is adjusted to 0.15%, other components content and preparation side
Method is identical with embodiment 1.
Comparative example 13
Compared with Example 1, other than the content of N element is adjusted to 0.03%, other components content and preparation side
Method is identical with embodiment 1.
Comparative example 14
Commercially available AZ31B magnesium alloy, based on mass percentage, the magnesium alloy is composed of the following components: Al 2.5-
3.5%, Zn 0.6-1.4%, Mn 0.2-1.0%, surplus are Mg and inevitable impurity, impurity content≤0.1%.
Comparative example 15
Compared with Example 1, other than the temperature of extruding is adjusted to 380 DEG C in preparation process, alloy component content with
And others preparation condition is identical with embodiment 1.
Comparative example 16
Compared with Example 1, other than the speed of extruding is adjusted to 0.8mm/s in preparation process, alloy component content
And others preparation condition is identical with embodiment 1.
Performance test
It is each according to GB/T16865-2013 deformation aluminium, magnesium and its alloy fabricated product tension test sample and method test
The mechanical property for the magnesium alloy profiles that embodiment and comparative example obtains, acquired results are as shown in table 2.
Table 2
Data in contrast table 2 are it is found that commercially available AZ31B Properties of Magnesium Alloy are as follows: tensile strength 245MPa is, it is specified that disproportional
Acceptance strength (Rp0.2) 157MPa, elongation after fracture 8.7%.Magnesium alloy profiles produced by the present invention, tensile strength 310-
For 350MPa, it is specified that disproportional acceptance strength (Rp0.2) is 230-280MPa, and elongation after fracture >=7% meets GBT 5156-
The requirement of 2013 magnesium alloy hot extruded shapes, comprehensive performance are much higher than AZ31B magnesium alloy.
The Applicant declares that the present invention is explained by the above embodiments detailed process equipment and process flow of the invention,
But the present invention is not limited to the above detailed process equipment and process flow, that is, it is above-mentioned detailed not mean that the present invention must rely on
Process equipment and process flow could be implemented.It should be clear to those skilled in the art, any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within of the invention
Within protection scope and the open scope.
Claims (10)
1. a kind of magnesium alloy profiles, which is characterized in that based on mass percentage, the magnesium alloy profiles are by following components group
At:
The rare earth element is Sm and Tm, and the molar ratio of the two is (3-4): 1, surplus is Mg and inevitable impurity.
2. magnesium alloy profiles as described in claim 1, which is characterized in that based on mass percentage, the magnesium alloy profiles
Middle Si≤0.05%, Fe≤0.003%, Cu≤0.01%, Ni≤0.001%.
3. magnesium alloy profiles as claimed in claim 1 or 2, which is characterized in that based on mass percentage, the magnesium alloy type
Impurity content≤0.1% in material.
4. the preparation method of magnesium alloy profiles as described in any one of claims 1-3, which is characterized in that the method includes with
Lower step:
(1) Al, Zn, Mn, V, N, Mg and Sm and Tm are added in furnace by formula ratio and carry out melting, cast, obtained after melting
To circle ingot casting；
(2) the circle ingot casting for obtaining step (1) is added in extruder, is squeezed by mold circle ingot casting, controls mold
Temperature is 450-480 DEG C, after the completion of extruding, obtains the magnesium alloy profiles.
5. method as claimed in claim 4, which is characterized in that step (1) V and N is added in the form of VN alloy.
6. method as described in claim 4 or 5, which is characterized in that the temperature of step (1) described melting is 640-650 DEG C.
7. such as the described in any item methods of claim 4-6, which is characterized in that the temperature of step (1) described casting is 650-660
℃。
8. such as the described in any item methods of claim 4-7, which is characterized in that the pressure≤21MPa of step (2) described extruding.
9. such as the described in any item methods of claim 4-8, which is characterized in that the speed of step (2) described extruding is 0.2-
0.4mm/s。
10. such as the described in any item methods of claim 4-9, which is characterized in that the described method comprises the following steps:
(1) Al, Zn, Mn, V, N, Mg and Sm and Tm are added in furnace by formula ratio, are warming up to 640-650 DEG C of progress melting,
Middle V and N is added in the form of VN alloy, is cast at 650-660 DEG C to gained alloy after the completion of melting, and round casting is obtained
Ingot；
(2) the circle ingot casting for obtaining step (1) is added in extruder, is squeezed by mold circle ingot casting, controls mold
Temperature is 450-480 DEG C, and the speed of extruding is 0.2-0.4mm/s, and pressure≤21MPa after the completion of extruding, obtains the magnesium alloy
Profile.
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| CN106676355A (en) * | 2017-03-02 | 2017-05-17 | 东北大学 | High-plasticity and heat-resistant AZ system magnesium alloy extruded material and preparation method thereof |
| CN107227415A (en) * | 2017-06-26 | 2017-10-03 | 重庆文理学院 | Magnesium intermediate alloy grain refiner containing vanadium and its preparation method and application |
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| CN106676355A (en) * | 2017-03-02 | 2017-05-17 | 东北大学 | High-plasticity and heat-resistant AZ system magnesium alloy extruded material and preparation method thereof |
| CN107227415A (en) * | 2017-06-26 | 2017-10-03 | 重庆文理学院 | Magnesium intermediate alloy grain refiner containing vanadium and its preparation method and application |
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| CN109207824A (en) * | 2017-06-29 | 2019-01-15 | 比亚迪股份有限公司 | A kind of magnesium alloy and preparation method thereof and mobile phone |
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