CN110195178A - A kind of heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity and its manufacturing method - Google Patents
A kind of heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity and its manufacturing method Download PDFInfo
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- CN110195178A CN110195178A CN201810158743.XA CN201810158743A CN110195178A CN 110195178 A CN110195178 A CN 110195178A CN 201810158743 A CN201810158743 A CN 201810158743A CN 110195178 A CN110195178 A CN 110195178A
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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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/04—Alloys based on magnesium with zinc or cadmium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
Abstract
The invention discloses a kind of heat-resisting magnesium alloys of resistance to combustion of High-strength high-plasticity, its chemical element mass percent are as follows: Sn1.0~3.0%, Al0.5~2.5%, Ca0.5~2.0%, Mn0.1~0.5%, Zn0.5~2.5%, Si0.1~0.5%, Sr0.1~0.5%, surplus are Mg and other inevitable impurity.The invention also discloses a kind of manufacturing methods of magnesium alloy extrusion as made from above-mentioned High-strength high-plasticity heat-resisting resistance to combustion magnesium alloy, comprising steps of obtaining magnesium alloy blank ingot casting after raw material is carried out melting and casting by (1)；(2) magnesium alloy blank ingot casting is heated to heat treatment holding temperature with 2 DEG C/s~100 DEG C/s heating rate, temperature range is 200~450 DEG C, and soaking time is 5~1000min；(3) magnesium alloy blank ingot casting is reheated to extruding preheating setting temperature with 2 DEG C/s~100 DEG C/s heating rate, the preheated one-section time, squeezing preheating setting temperature is 50~300 DEG C；(4) magnesium alloy blank ingot casting is squeezed by magnesium alloy extrusion using extruder；(5) ageing treatment is carried out after squeezing.
Description
Technical field
The present invention relates to a kind of magnesium alloy and its manufacturing method more particularly to a kind of heat-resisting magnesium alloys of resistance to combustion of High-strength high-plasticity
And its manufacturing method.
Background technique
Magnesium is one kind most light in common metal structural material, and specific gravity is about 1.7g/cm3, it is the 1/4 of steel, the 2/3 of aluminium.
Magnesium and magnesium alloy have resourceful, energy saving, environmental-friendly three advantages, and are the very high light structures of specific strength
Material and functional material.But intensity and elongation percentage due to magnesium alloy is not high enough, ignition point is low, heat-resisting usability is inadequate, from
And the application range of magnesium alloy is subject to certain restrictions.
At present in the alloying research of high-strength magnesium alloy, the addition of alloying element be concentrated mainly on aluminium, zinc, silicon, strontium,
Copper, nickel, manganese, zirconium, calcium, lithium and bismuth or scandium, yttrium and rare earth element, strengthening mechanism be mainly solution strengthening or with magnesium shape
Strengthen at intermetallic compound.It studies and is mainly contained in more high-strength magnesium alloy (series such as Mg-Gd/Y) largely at present
The rare earth either elements such as scandium, yttrium, and add a large amount of rare earth and high price element to will lead to the series alloy price more expensive,
In general industry, it is difficult to be used widely.And the atomic number of rare earth element is all larger, the use meeting of a large amount of rare earth elements
Cause the density of the alloy bigger than normal, reduces the advantage of magnesium alloy lightweight.
In addition, in the development process of high-strength magnesium alloy, another difficult point be how holding while improving intensity
Appropriate high ductility.Magnesium is difficult at room temperature, this is determined by its essence.The primary deformable mode of magnesium has basal plane sliding
It moves, Prismatic slip, pyramidal surface sliding and twin.In addition to basal slip, other slide masses, which tie up to, to be difficult to start at room temperature.
In addition, in process, the strong basis plane texture of magnesium gradually forms so that basal slip starts more difficult.And twin
Start starting for the crystal grain suitable unsuitable twin of orientation before depending on magnesium processing, even and if twin start, the strain that can be carried
Amount is also little, and maximum only has the 8% of overall strain amount.In contrast to this, aluminium and its aluminium alloy have room temperature high formability, they can be with
Pop can is processed into from aluminium sheet at room temperature.And 30% is pushed in magnesium and magnesium alloy room temperature rolling can be broken.
Currently, adding suitable alloying element is the main means for improving magnesium alloy room temperature formability.This is because some
The addition of alloying element can weaken texture, or other slide masses in addition to basal slip can be made to tie up to and be easier at room temperature
It starts.However nonetheless, the room temperature of magnesium alloy and medium temperature formability are still bad.Although magnesium alloy is squeezed by aximal deformation value
After pressure processing (such as isogonism extruding), Grain Boundary Sliding can be started as additional deformation mode in room temperature, but it is in room temperature pressure
Maximum volume under pressure also only only has 20% in compression process.In addition, from the magnesium alloy sample size that aximal deformation value extrusion process comes out toward
Toward very little, it is not enough to industrially be applied.
In the prior art, Publication No. CN102485928A, publication date are on June 6th, 2012, entitled " mixed containing rich cerium
The Chinese patent literature of the high-strength heat-resisting magnesium alloy and its preparation processing method of conjunction rare earth " discloses a kind of cerium-rich mischmetal
High-strength heat-resisting magnesium alloy, room temperature tensile intensity reaches 380MPa, and yield strength reaches 350MPa, but in its ingredient
Rare earth adding quantity be up to 7.3wt%.
In addition, the applying date is on January 19th, 2009 application No. is 200910042537.3, entitled " one kind contains Ca and Sr
Heat-resistant deforming magnesium alloy " Chinese patent literature disclose a kind of advanced heat-resistant deforming magnesium alloy containing Ca and Sr, component
Weight percent are as follows: 6.0%~9.0%Al, 0.5%~3.0%Ca, 0.05%~0.5%Sr, 0.1%~0.8%Mn,
Remainder is magnesium.Its tensile strength is 330MPa, yield strength 200MPa, elongation percentage 14%, and be not directed to the resistance to combustion of magnesium alloy
The optimization of performance.
Based on this, it is expected that obtain a kind of magnesium alloy, the magnesium alloy have simultaneously lower cost, high intensity, high elongation,
The performance of resistance to combustion and preferable heat resistance, to be widely used in aerospace, automobile and track train grade load
Structural member, medical, happiness and outdoor sports instrument structural member, and the components required with certain heat-resisting and firing resistance
Equal fields.
Summary of the invention
One of the objects of the present invention is to provide a kind of heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity, this kind of magnesium alloy has height
Intensity, high-ductility, the performance of heat-resisting, resistance to combustion, and it is low in cost, it is widely portable in aerospace, automobile and track
Train grade load-carrying construction part, medical, happiness and outdoor sports instrument structural member, and there is certain heat-resisting and firing resistance
It is required that the fields such as components.
To achieve the goals above, the present invention provides a kind of heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity, chemical elements
Mass percent are as follows:
1.0~3.0wt% of Sn,
0.5~2.5wt% of Al,
0.5~2.0wt% of Ca,
0.1~0.5wt% of Mn,
0.5~2.5wt% of Zn,
0.1~0.5wt% of Si,
0.1~0.5wt% of Sr,
Surplus is Mg and other inevitable impurity.
Each chemical element design principle is as described below in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention:
Al, Zn are most common alloying elements in magnesium alloy, and aluminum and zinc can form limit solid solution with magnesium, improve alloy
Casting character can be improved while intensity and hardness, ageing strengthening can also be generated by heat treatment.Therefore, of the present invention
High-strength high-plasticity heat-resisting resistance to combustion magnesium alloy the mass percent of Zn is controlled in 0.5~2.5wt%.
Effective Grain Refinement Effect can occur in magnesium for Ca element, can inhibit the oxidation of molten magnesium, improve alloy melt
Ignition temperature, and the croop property of alloy can be improved.Ca element solubility in magnesium is smaller, and in magnesium alloy fused mass, Ca holds
It easily is diffused into liquid surface, is assembled.Since the atom of Ca and oxygen are affine liquid can be gathered in lower than the affine energy of magnesium and oxygen
The Ca on surface will generate the mixed oxide of fine and close magnesium and alloying element, magnesium alloy is prevented to burn preferentially in conjunction with oxygen.
In addition, will appear three kinds of second different phases in alloy when changing the ratio of Al/Ca.In particular, suitable control its
Ratio, can obtain the orderly area single layer GP in the alloy, and this strengthening effect to alloy clearly, can make alloy
Intensity is improved significantly.In addition, in order to guarantee that second-phase strength effect is in alloy to obtain compared with high alloy intensity, it is necessary to
The second phase particles of sufficient amount are generated in alloy.According to inventor's the study found that suitable control Al/Ca ratio feelings
Under condition, the amount in the second phase amount and the area GP gradually increases with the increase of Al, Ca element additive amount in alloy.A small amount of Al, Ca
In the presence of element, stronger strengthening effect can be generated to alloy, but the quantity of the second phase formed is relatively fewer；As Al, Ca
When content reaches 1.5wt% or more, second phase particles Al largely with preferable strengthening effect can be generated2Ca etc..But aluminium
When with the too high levels of calcium, will form a large amount of coarse second phase particles, intensity and plasticity to alloy also generate harmful effect,
Mechanical property is caused to reduce.Therefore, the mass percent of the Al in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention
Control is controlled in 0.5~2.5wt%, the mass percent of Ca in 0.5~2.0wt%.
Mn controls iron content by forming Fe-Mn compound precipitates, so as to improve the corrosion condition in magnesium alloy；Together
When, Mn element can increase heat resistance in the magnesium alloy, refine crystal grain, reinforced alloys.Therefore, of the present invention high-strength high-plastic
Property heat-resisting resistance to combustion magnesium alloy the mass percent of Mn element is controlled in 0.1~0.5wt%.
The eutectic temperature that matrix alloy liquid can be reduced in Sr addition magnesium alloy increases the supercooling of alloy under the same conditions
Degree, Refining Mg Alloy grain structure.A small amount of Sr element is added in the alloy of calcic can further increase the resistance to of alloy
Hot creep-resistant property.When Sr is added into Mg-Al-Ca base magnesium alloy, solid solubility of the Al in Mg matrix can be reduced, to reduce
Mg17Al12Furthermore the quantity of phase can further refine Al2Ca phase particle size, moreover it is possible to it is steady to form dystectic heat in grain boundaries
The Al set4Sr、 Mg8Al4Sr cenotype, the dispersed and tiny precipitated phase of these new formation, can play the role of pinning crystal boundary, have
Effect prevents sliding and the cracking of crystal grain, improves the heat resistance of the alloy.In addition, the tiny Mg generated8Al4Sr phase can mitigate
Micro- galvanic corrosion of magnesium alloy improves corrosion resistance of the magnesium alloy in NaCl solution.But when Sr additional amount reaches a certain content
When, Mg8Al4Sr phase amount is continuously increased, and will increase the area of cathode phase, and the galvanic corrosion rate of magnesium alloy is caused to increase.Therefore
The heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention further adds a certain amount of Sr on the basis of a small amount of Ca is added
Element, and the mass percent of Sr element is controlled in 0.1~0.5wt%.
Sn, Si element are not solid-solution in Mg substantially, can form high-melting-point stable compound Mg with magnesium2Sn、Mg2Si phase.
Mg2Sn、Mg2Si phase is both effective hardening constituent and effectively stable recrystallization crystal particle dimension, and deformed alloy is protected
Hold fine grain structure, moreover it is possible to form stable compound with other alloying elements such as Al, Zn in alloy, improve the creep of alloy
Performance.In addition, Si, Sn are also a kind of weak grain refiner, be conducive to obtain refinement casting during casting squeezes ingot casting
State tissue.Therefore, the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention controls the mass percent of Sn element 1.0
~3.0wt% controls the mass percent of Si element in 0.1~0.5wt%.
Further, in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention, microstructure has micron
And/or the second phase of Nano grade, second phase includes Mg2Ca、Mg2Sn、Mg2Si、Al2Ca、 Al8Mn5、Al4In Sr extremely
It is two kinds few.
In the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention, microstructure has micron and/or nanometer
Second phase of rank, the second phase include Mg2Ca、Mg2Sn、Mg2Si、Al2Ca、Al8Mn5、 Al4At least two in Sr.Due to this
The fusing point of a little second phases is higher, Mg2Sn、Mg2Ca、Mg2Si、 Al2Ca、Al8Mn5、Al4The fusing point of Sr is respectively 525 DEG C, 714
DEG C, 1087 DEG C, 1079 DEG C, 1160 DEG C, 936 DEG C, therefore these second phases have both preferable strengthening effect and thermal stability, have
Conducive to guaranteeing that the higher heat resistance of magnesium alloy and mechanical property are horizontal, to keep High-strength high-plasticity of the present invention heat-resisting resistance to
Magnesium alloy yield strength with higher and resistance to combustion, heat resisting temperature are fired, good comprehensive performance is made it have.
Further, the α magnesium-based in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention, in microstructure
The crystallite dimension of body is 0.1-20 μm.
In above-mentioned technical proposal, α magnesium matrix fine uniform ensure that the heat-resisting magnesium of resistance to combustion of High-strength high-plasticity of the present invention
Alloy also have while having high-intensitive high plasticity and preferably at a high temperature of heat-resistant creep-resistant performance.
Further, in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention, wherein 90% or more α magnesium
The crystallite dimension of matrix is at 1-10 μm.
Further, in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention, described in grain boundaries distribution
The size of second phase is≤20 μm.
In above-mentioned technical proposal, in the second phase fine uniform of grain boundaries distribution, high-strength height of the present invention ensure that
The heat-resisting resistance to combustion magnesium alloy of plasticity also have while having high-intensitive high plasticity and preferably at a high temperature of heat-resistant creep-resistant
Energy.
Further, in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention, described the of intra-die
The size of two-phase is≤10 μm.
In above-mentioned technical proposal, in the second phase fine uniform of intra-die, it ensure that of the present invention high-strength high-plastic
Property heat-resisting resistance to combustion magnesium alloy also have while have high-intensitive high plasticity and preferably at a high temperature of heat-resistant creep-resistant performance.
Further, in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention, surrender at room temperature is strong
Degree >=350MPa, tensile strength >=400MPa, elongation percentage >=25%.
Further, it in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention, under 150 DEG C of high temperature, bends
Take intensity >=150MPa, tensile strength >=220MPa, elongation percentage >=50%.
Further, in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention, 660 DEG C of ignition temperature >.
Further, in the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention, density is less than 1.82g/
cm3。
Correspondingly, another object of the present invention is to provide one kind is made by the heat-resisting resistance to combustion magnesium alloy of above-mentioned High-strength high-plasticity
Magnesium alloy extrusion.The magnesium alloy extrusion has high intensity, high-ductility, the performance of heat-resisting, resistance to combustion.
To achieve the goals above, the present invention provides a kind of magnesium alloy extrusions, use above-mentioned High-strength high-plasticity resistance to
The resistance to combustion magnesium alloy of heat is made.
Correspondingly, third object of the present invention is to provide a kind of manufacturing method of above-mentioned magnesium alloy extrusion, the system
Quick heating treatment process and crystal grain refinement treatment process that method designs matching optimization by reasonable ingredient are made, is effectively improved
Intensity, plasticity, the performance of heat-resisting and resistance to combustion of magnesium alloy extrusion.
To achieve the goals above, the present invention provides a kind of manufacturing methods of magnesium alloy extrusion, comprising steps of
(1) after raw material being carried out melting and casting, magnesium alloy blank ingot casting is obtained；
(2) magnesium alloy blank ingot casting is heated to heat treatment holding temperature, temperature with 2 DEG C/s~100 DEG C/s heating rate
Spending range is 200~450 DEG C, and soaking time is 5~1000min；
(3) magnesium alloy blank ingot casting is reheated to extruding preheating setting temperature with 2 DEG C/s~100 DEG C/s heating rate
Degree, the preheated one-section time, the extruding preheating setting temperature is 50~300 DEG C；
(4) magnesium alloy blank ingot casting is squeezed by magnesium alloy extrusion using extruder；
(5) ageing treatment is carried out after squeezing.
In above scheme, in step (1), raw material is subjected to ingredient according to above-mentioned element mass percent, in smelting furnace
After middle fusing, it is cast into blank, is then cut into the magnesium alloy blank ingot casting of size needed for extruder, it is spare.In step (2) and
In step (3), being all made of heating rate is the quick heating treatment process of 2 DEG C/s~100 DEG C/s, and heating speed is fast, high-efficient,
It can be effectively prevented Second Phase Precipitation or roughening of growing up in insulating process, control the size and distribution of the second phase, while can be with
Prevent the crystallite dimension of magnesium matrix from becoming larger, to effectively improve the intensity and elongation percentage of magnesium alloy extrusion.
In addition, in step (4), magnesium alloy blank ingot casting is put into extruder extrusion process into magnesium alloy extrusion,
Shape can be tubing, bar or profile.Extrusion process used for forming is the process of a refinement crystal grain, can make to be formed in casting
Coarse second phase gradually obtains broken refinement, and Dispersed precipitate is in magnesium matrix, while can also sufficiently eliminate casting flaw,
Significant refinement coarse grain, to improve the plasticity of magnesium alloy extrusion, intensity and heat resistance.This is because working as the crystal grain of magnesium
When size refine to several microns, being traditionally difficult to the magnesium shaped or its magnesium alloy becomes with the super formability of room temperature, thus easily
In forming.In coarse-grain (crystallite dimension is much larger than several microns) magnesium alloy, the deformation at room temperature mode of magnesium is grain matrix deformation, including
Dislocation movement and twin.It being influenced by the hexagonal structure of magnesium, grain matrix deformation mode is limited, it is not enough to carry a large amount of plastic deformations,
So the room temperature forming of coarse-grain magnesium alloy is poor.And when the crystallite dimension of magnesium is less than several microns, the primary deformable mould of magnesium
Formula switchs to crystal boundary deformation, such as the unitary rotation of grain-boundary sliding and crystal grain by grain matrix deformation.In Ultra-fine Grained, (crystallite dimension is less than number
A micron) magnesium alloy plastic deformation in, these crystal boundaries deformation provide additional deformation pattern.At the same time, as magnesium closes
The reduction of the crystallite dimension of gold, the increase of grain boundary area, dynamic recrystallization is more easier to occur in temperature-room type plasticity deformation, reduces
Transgranular degree of strain.Crystal boundary deformation pattern and a large amount of of room temperature dynamic recrystallization start, so that ultra-fine grained magnesium alloy is transgranular
Strain can not accumulate the degree that can lead to fracture, so that it shows room temperature high-ductility.
In addition, it should be noted that, inventor has found after study, the deformation of grain refinement process and metal alloy
Temperature is closely related.In the extrusion process of different temperatures dynamic recrystallization can occur for magnesium, in the process, coarse casting
The recrystallized structure that tissue will be changed into refinement is made, and squeezing temperature is to influence the principal element of recrystallization crystal particle dimension.?
In conventional extrusion (conventional extrusion temperature is generally greater than 300 DEG C), the crystal boundary of magnesium is easy movement, the dynamic recrystallization grain nucleation of magnesium
Afterwards, it can grow up rapidly to 10-100 microns.This case the step of in (3), squeezing preheating setting temperature is 50~300 DEG C,
Not higher than 300 DEG C, extruding temperature is lower, and so as to a large amount of forming cores of dynamic recrystallization, and the speed of crystal boundary movement is relatively slow, thus
Control the size of dynamic recrystallization crystal grain, and this case introduce lot of trace alloying element generate it is a large amount of tiny by second
Phase particle obtains a large amount of heterogeneous nucleation sites by particle triggered nucleation (PSN) mechanism, and pinning fine grain boundaries migrate, from
And the recrystallized structure of fine uniform is obtained by extrusion process used for forming, to obtain the magnesium alloy extrusion haveing excellent performance.
Further, in manufacturing method of the present invention, in the step (2), heating method is induction heating；
And/or heating method is induction heating in the step (3).
In above scheme, the heating of induction heating is high-efficient, can be realized quick heating, so as to the conjunction of strict control magnesium
The temperature and time of golden blank ingot casting heat preservation heat treatment and/or the pre-heat treatment, while electromagnetic induction magnetic field is for alloying element
Diffusion has acceleration, reduces Second Phase Precipitation quantity and size to the greatest extent.In addition, in the processing of magnesium alloy blank ingot casting preheating
Stage is rapidly heated by induction heating and preheats setting temperature to required extruding, largely can be precipitated to be formed to avoid solid solution element
Second phase improves deformation uniformity to reduce subsequent extrusion resistance of deformation, for improving the intensity of magnesium alloy extrusion and prolonging
The rate of stretching plays a significant role.
Further, in manufacturing method of the present invention, in the step (3), preheating time is 5~50min.
Further, in manufacturing method of the present invention, in the step (4), pressure-ram speed be 0.1~
20mm/s, extrusion ratio are 10~100.
In above scheme, extrusion ratio refers to total cross sectional area of the magnesium alloy blank ingot casting before extruding and makes after squeezing
The ratio between the total cross sectional area of magnesium alloy extrusion obtained.
Further, in manufacturing method of the present invention, in the step (5), the temperature of ageing treatment is
100-200 DEG C, time 0-24h.
The heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention and its manufacturing method have such as compared with prior art
It is lower the utility model has the advantages that
The heat-resisting resistance to combustion magnesium alloy advantage of lower cost of High-strength high-plasticity of the present invention, by the Conventional alloys of micro addition
Element al, Ca, Mn, Zn, Sn, Si, Sr composition, compared with the existing technology in magnesium-rare earth series, this case is by cost control
In reduced levels.
The heat-resisting resistance to combustion magnesium alloy heat resistance of High-strength high-plasticity of the present invention is good, due to introduce it is a large amount of tiny and
The heat-resisting high-melting-point second phase particles of Dispersed precipitate, the creep rate of alloy at relatively high temperatures is slower, is not higher than 25 × 10-9s-1。
The heat-resisting resistance to combustion magnesium alloy comprehensive mechanical property of High-strength high-plasticity of the present invention is excellent, have both higher-strength, compared with
High-ductility, room-temperature yield strength are higher than 350MPa, and tensile strength is higher than 400MPa, and elongation percentage is greater than 25%.150 DEG C of high temperature
Under, yield strength is greater than 150MPa, and tensile strength is greater than 220MPa, and elongation percentage is greater than 50%.
The heat-resisting resistance to combustion magnesium alloy firing resistance of High-strength high-plasticity of the present invention is good, due to containing Ca, Sn, Sr, Si etc.
The ignition point of element, alloy significantly improves, and ignition temperature is above 660 DEG C.
In preferred technical solution, the heat-resisting resistance to combustion magnesium alloy density of High-strength high-plasticity of the present invention is low, obtained
Magnesium alloy density is less than 1.82g/cm3, compared with the existing technology in high-strength magnesium-rare earth series density it is significantly smaller, and
Relatively pure magnesium density increase is smaller, preferably embodies the light feature of magnesium alloy.
In addition, the heat treatment efficiency and quality of the manufacturing method of the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of the present invention
It significantly improves, using quick induction heating technology, the middle resistance-heated furnace kept the temperature using the long period is added compared with the existing technology
Thermal process, this case heat treatment and preheating time shorten, and production efficiency improves.Heating efficiency is high, energy saving, to reduce product
Production cost is conducive to diffusion of alloy elements, heat treatment effect simultaneously as the electromagnetic induction magnetic field in heat treatment process influences
Rate and quality significantly improve, so that magnesium alloy obtained has high-strength and high ductility performance.
Specific embodiment
Resistance to combustion magnesium alloy heat-resisting to High-strength high-plasticity of the present invention and its manufacture below in conjunction with specific embodiments
Method makes further explanation, however should explanation and description do not unduly limit the technical scheme of the present invention.
Embodiment 1-6 and comparative example 1-3
Table 1 lists the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of embodiment 1-6 and the conventional magnesium alloy of comparative example 1-3
In each chemical element mass percent.
Table 1. (wt%, surplus are Mg and other inevitable impurity)
| Al | Ca | Mn | Sn | Zn | Si | Sr | |
| Embodiment 1 | 2.5 | 2.0 | 0.25 | 1.0 | 2.5 | 0.15 | 0.5 |
| Embodiment 2 | 1.5 | 0.5 | 0.4 | 2.5 | 2.2 | 0.1 | 0.1 |
| Embodiment 3 | 0.5 | 1.0 | 0.15 | 1.5 | 2.0 | 0.3 | 0.2 |
| Embodiment 4 | 1.0 | 1.5 | 0.2 | 1.0 | 1.0 | 0.5 | 0.4 |
| Embodiment 5 | 2.2 | 0.8 | 0.5 | 2.0 | 1.5 | 0.4 | 0.3 |
| Embodiment 6 | 0.8 | 1.9 | 0.1 | 3.0 | 0.5 | 0.2 | 0.25 |
| Comparative example 1 | 0.2 | 2.5 | 0.05 | 0.5 | 0.3 | 0.2 | 0.05 |
| Comparative example 2 | 3.0 | 0.1 | 0.6 | 6 | 3 | 0.2 | 0.8 |
| Comparative example 3 | 0.8 | 1.9 | 0.1 | 3.0 | 0.5 | 0.2 | 0.25 |
The manufacturer of the conventional magnesium alloy of the heat-resisting resistance to combustion magnesium alloy of the High-strength high-plasticity of embodiment 1-6 and comparative example 1-3
Method, which is adopted, to be prepared by the following steps:
(1) it is matched according to each chemical element listed by table 1 after carrying out melting and casting, obtains magnesium alloy blank ingot casting；
(2) by magnesium alloy blank ingot casting with 2 DEG C/s~100 DEG C/s heating rate induction heating to heat treatment heat preservation temperature
Degree, temperature range are 200~450 DEG C, and soaking time is 5~1000min；
(3) magnesium alloy blank ingot casting is set with 2 DEG C/s~100 DEG C/s heating rate again induction heating to preheating is squeezed
Temperature is set, preheats 5~50min, the extruding preheating setting temperature is 50~300 DEG C；
(4) magnesium alloy blank ingot casting being squeezed by magnesium alloy extrusion using extruder, pressure-ram speed is 0.1~
20mm/s, extrusion ratio are 10~100；
(5) ageing treatment is carried out after squeezing, the temperature of ageing treatment is 100-200 DEG C, time 0-24h.
Table 2-1 and table 2-2 lists the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity and comparative example 1-3 of embodiment 1-6
The specific process parameter of the manufacturing method of conventional magnesium alloy.
Table 2-1.
Table 2-2.
The room temperature of the conventional magnesium alloy of resistance to combustion magnesium alloy heat-resisting to the High-strength high-plasticity of embodiment 1-6 and comparative example 1-3
With under 150 DEG C of high temperature mechanical property (tensile strength, yield strength, elongation percentage) and ignition temperature, alloy density and
200 DEG C, the creep rate under 70MPa tested, test result is listed in Table 3 below.
Table 3.
As can be seen from Table 3, the heat-resisting resistance to combustion magnesium alloy of the High-strength high-plasticity of embodiment 1-6 uses chemistry of the present invention
Element mass percent and technological parameter, thus its tensile strength >=400MPa at room temperature, yield strength >=350MPa are prolonged
Rate >=25% is stretched, under 150 DEG C of high temperature, tensile strength >=220MPa, yield strength >=150MPa, elongation percentage >=50%,
That is its intensity and plasticity with higher；660 DEG C of its ignition temperature >, that is to say, that it is with excellent firing resistance；
Its density is less than 1.82g/cm3, light weight.Meanwhile 200 DEG C, the creep rate under 70MPa be not higher than 25 × 10-9s-1, creep
Better performances.In the microstructure of the heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity of embodiment 1-6, there is micron and/or receive
Other second phase of meter level, the second phase includes Mg2Ca、Mg2Sn、Mg2Si、Al2Ca、Al8Mn5、 Al4At least two in Sr.These
The fusing point of second phase is higher, at a high temperature of ensure that the heat-resisting resistance to combustion magnesium alloy of the High-strength high-plasticity of embodiment 1-6 also has preferably
Heat-resistant creep-resistant performance.
And the conventional magnesium alloy of comparative example 1-3, tensile strength highest at room temperature are only capable of reaching 390MPa, surrender
Intensity highest is only capable of reaching 335MPa, and elongation percentage is up to 30%, and under 150 DEG C of high temperature, tensile strength highest is only capable of reaching
210MPa, yield strength highest are only capable of reaching 150MPa, and elongation percentage is up to 40%, that is to say, that its mechanical property is poor.
It should be noted that prior art part is not limited to given by present specification in protection scope of the present invention
Embodiment, all prior arts not contradicted with the solution of the present invention, including but not limited to first patent document, formerly
Public publication, formerly openly use etc., it can all be included in protection scope of the present invention.
In addition, in this case in the combination of each technical characteristic and unlimited this case claim documented combination or
It is combination documented by specific embodiment, all technical characteristics that this case is recorded can be freely combined in any way
Or combine, unless generating contradiction between each other.
It is also to be noted that embodiment enumerated above is only specific embodiments of the present invention.The obvious present invention is not
Above embodiments are confined to, the similar variation or deformation made therewith are that those skilled in the art can be from present disclosure
It immediately arrives at or is easy to just to associate, be within the scope of protection of the invention.
Claims (17)
1. a kind of heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity, which is characterized in that its chemical element mass percent are as follows:
1.0~3.0wt% of Sn,
0.5~2.5wt% of Al,
0.5~2.0wt% of Ca,
0.1~0.5wt% of Mn,
0.5~2.5wt% of Zn,
0.1~0.5wt% of Si,
0.1~0.5wt% of Sr,
Surplus is Mg and other inevitable impurity.
2. the heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity as described in claim 1, which is characterized in that its microstructure has micron
And/or the second phase of Nano grade, second phase includes Mg2Ca、Mg2Sn、Mg2Si、Al2Ca、Al8Mn5、Al4In Sr extremely
It is two kinds few.
3. the heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity as described in claim 1, which is characterized in that the α magnesium in its microstructure
The crystallite dimension of matrix is 0.1-20 μm.
4. the heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity as claimed in claim 3, which is characterized in that wherein 90% or more α magnesium
The crystallite dimension of matrix is at 1-10 μm.
5. the heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity as claimed in claim 2, which is characterized in that described in grain boundaries distribution
The size of second phase is≤20 μm.
6. the heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity as claimed in claim 2, which is characterized in that described the of intra-die
The size of two-phase is≤10 μm.
7. the heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity as described in claim 1, which is characterized in that its surrender at room temperature is strong
Degree >=350MPa, tensile strength >=400MPa, elongation percentage >=25%.
8. the heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity as described in claim 1, which is characterized in that it bends under 150 DEG C of high temperature
Take intensity >=150MPa, tensile strength >=220MPa, elongation percentage >=50%.
9. the heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity as described in claim 1, which is characterized in that 660 DEG C of its ignition temperature >.
10. the heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity as described in claim 1, which is characterized in that its density is less than 1.82g/
cm3。
11. the heat-resisting magnesium alloy of resistance to combustion of High-strength high-plasticity as described in claim 1, which is characterized in that its 200 DEG C, under 70MPa
Creep rate is not higher than 25 × 10-9s-1。
12. magnesium made from a kind of heat-resisting resistance to combustion magnesium alloy of High-strength high-plasticity using as described in any one of claim 1-11
Alloy extrusion material.
13. the manufacturing method of magnesium alloy extrusion as claimed in claim 12, which is characterized in that comprising steps of
(1) after raw material being carried out melting and casting, magnesium alloy blank ingot casting is obtained；
(2) magnesium alloy blank ingot casting is heated to heat treatment holding temperature, temperature model with 2 DEG C/s~100 DEG C/s heating rate
Enclosing is 200~450 DEG C, and soaking time is 5~1000min；
(3) magnesium alloy blank ingot casting is reheated to extruding preheating setting temperature with 2 DEG C/s~100 DEG C/s heating rate,
The preheated one-section time, the extruding preheating setting temperature is 50~300 DEG C；
(4) magnesium alloy blank ingot casting is squeezed by magnesium alloy extrusion using extruder；
(5) ageing treatment is carried out after squeezing.
14. manufacturing method as claimed in claim 13, which is characterized in that in the step (2), heating method is that induction adds
Heat；And/or heating method is induction heating in the step (3).
15. manufacturing method as claimed in claim 13, which is characterized in that in the step (3), preheating time be 5~
50min。
16. manufacturing method as claimed in claim 13, which is characterized in that in the step (4), pressure-ram speed is
0.1~20mm/s, extrusion ratio are 10~100.
17. manufacturing method as claimed in claim 13, which is characterized in that in the step (5), the temperature of ageing treatment is
100-200 DEG C, time 0-24h.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021141169A1 (en) * | 2020-01-10 | 2021-07-15 | 엘지전자 주식회사 | Magnesium alloy |
| CN113293329A (en) * | 2020-02-21 | 2021-08-24 | 宝山钢铁股份有限公司 | Low-cost high-strength high-heat-conductivity magnesium alloy material and manufacturing method thereof |
| CN114438384A (en) * | 2020-11-02 | 2022-05-06 | 宝钢金属有限公司 | Low-cost high-toughness flame-retardant magnesium alloy and preparation method of extrusion material thereof |
| CN114875256A (en) * | 2022-05-09 | 2022-08-09 | 西安航空学院 | Magnesium-silicon-tin ternary alloy with precise component control and induction smelting method |
| CN116043084A (en) * | 2023-02-08 | 2023-05-02 | 凤阳爱尔思轻合金精密成型有限公司 | Heat-resistant magnesium alloy and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001316752A (en) * | 2000-02-24 | 2001-11-16 | Mitsubishi Alum Co Ltd | Magnesium alloy for diecasting |
| JP2004162090A (en) * | 2002-11-11 | 2004-06-10 | Toyota Industries Corp | Heat resistant magnesium alloy |
| CN1676646A (en) * | 2005-04-21 | 2005-10-05 | 上海交通大学 | High-strength heat-resisting magnesium alloy and its preparing method |
| CN101161840A (en) * | 2007-11-29 | 2008-04-16 | 哈尔滨工程大学 | Mg-Si-Sn series magnesium alloy and heat treatment process for deteriorate Chinese character shaped eutectic Mg2Si phase therein |
| CN104651692A (en) * | 2013-11-20 | 2015-05-27 | 沈阳工业大学 | High-strength and -toughness rare earth magnesium alloy and preparation method thereof |
| CN108385007A (en) * | 2018-02-09 | 2018-08-10 | 湘潭大学 | A kind of high performance heat resistant deformed magnesium alloy material of low cost and preparation method thereof |
-
2018
- 2018-02-26 CN CN201810158743.XA patent/CN110195178B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001316752A (en) * | 2000-02-24 | 2001-11-16 | Mitsubishi Alum Co Ltd | Magnesium alloy for diecasting |
| JP2004162090A (en) * | 2002-11-11 | 2004-06-10 | Toyota Industries Corp | Heat resistant magnesium alloy |
| CN1676646A (en) * | 2005-04-21 | 2005-10-05 | 上海交通大学 | High-strength heat-resisting magnesium alloy and its preparing method |
| CN101161840A (en) * | 2007-11-29 | 2008-04-16 | 哈尔滨工程大学 | Mg-Si-Sn series magnesium alloy and heat treatment process for deteriorate Chinese character shaped eutectic Mg2Si phase therein |
| CN104651692A (en) * | 2013-11-20 | 2015-05-27 | 沈阳工业大学 | High-strength and -toughness rare earth magnesium alloy and preparation method thereof |
| CN108385007A (en) * | 2018-02-09 | 2018-08-10 | 湘潭大学 | A kind of high performance heat resistant deformed magnesium alloy material of low cost and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021141169A1 (en) * | 2020-01-10 | 2021-07-15 | 엘지전자 주식회사 | Magnesium alloy |
| CN113293329A (en) * | 2020-02-21 | 2021-08-24 | 宝山钢铁股份有限公司 | Low-cost high-strength high-heat-conductivity magnesium alloy material and manufacturing method thereof |
| CN114438384A (en) * | 2020-11-02 | 2022-05-06 | 宝钢金属有限公司 | Low-cost high-toughness flame-retardant magnesium alloy and preparation method of extrusion material thereof |
| CN114875256A (en) * | 2022-05-09 | 2022-08-09 | 西安航空学院 | Magnesium-silicon-tin ternary alloy with precise component control and induction smelting method |
| CN116043084A (en) * | 2023-02-08 | 2023-05-02 | 凤阳爱尔思轻合金精密成型有限公司 | Heat-resistant magnesium alloy and preparation method thereof |
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