CN109182865A - A kind of high strength rare earth-magnesium alloy materials and preparation method thereof - Google Patents

A kind of high strength rare earth-magnesium alloy materials and preparation method thereof Download PDF

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CN109182865A
CN109182865A CN201811384339.0A CN201811384339A CN109182865A CN 109182865 A CN109182865 A CN 109182865A CN 201811384339 A CN201811384339 A CN 201811384339A CN 109182865 A CN109182865 A CN 109182865A
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magnesium alloy
rare earth
strength
alloy materials
alloy
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CN109182865B (en
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冷哲
石学智
周英棠
陈立桥
龙运前
余璇
于晓明
张挥球
蔡璐
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Zhejiang Ocean University ZJOU
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C23/00Alloys based on magnesium
    • C22C23/06Alloys based on magnesium with a rare earth metal as the next major constituent
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/03Making alloys by melting using master alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C23/00Alloys based on magnesium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon

Abstract

The present invention provides a kind of high strength rare earth-magnesium alloy materials and preparation method thereof, belongs to structural metallic materials field, which includes the Dy element of 3.0-8.0wt%, the Cu element of 2.0-5.0wt% and the Sn element of 0.5-2.0wt%.Preparation method includes that the raw metal melting after preheating is cast to obtain as cast condition rare earth-magnesium alloy;By the processing of obtained as cast condition rare earth-magnesium alloy homogeneity;Homogeneity treated rare earth-magnesium alloy is subjected to hot extrusion.The composition proportion and preparation method of rare earth-magnesium alloy material of the present invention can make the novel reinforced phase (Mg that high-volume fractional is capable of forming inside alloy10Dy1Cu1Phase), this can mutually significantly improve the room temperature and mechanical behavior under high temperature of magnesium alloy.Rare earth magnesium alloy material prepared by the present invention has high-intensitive and characteristic resistant to high temperature.

Description

A kind of high strength rare earth-magnesium alloy materials and preparation method thereof
Technical field
The invention belongs to structural metallic materials fields, and in particular to a kind of high strength rare earth-magnesium alloy materials and its preparation Method.
Background technique
In recent years, with the fast development in the fields such as automobile manufacture, aerospace, weaponry and electronics 3C, China Demand to high performance structures weight-reducing material is more urgent.As most light structural metallic materials, magnesium alloy is by feat of high ratio Intensity, specific stiffness and good electromagnetic shielding performance present big advantage and potentiality in above-mentioned field.However, with The application range of magnesium alloy constantly expands, and relatively low absolute intensity is increasingly becoming the bottleneck for limiting its development.In the past Decades in, traditional cast magnesium alloy, especially AZ, AM series magnesium alloy, due to their good casting characters, by It is widely used in the structural members such as aircraft engine parts, aircraft target ship, automobile gearbox and bell housing.AZ and AM two at present The magnesium alloy of a series accounts for about the 90% of auto industry magnesium alloy, although they have good specific strength, it is absolutely Intensity is not still high, especially when being more than 120 DEG C using temperature, the intensity of alloy sharp fall with the raising of temperature, Therefore such alloy should not use for a long time at a higher temperature.The disadvantages of absolute intensity of magnesium alloy is low, and high-temperature behavior is poor All greatly limit the practical application of magnesium alloy.Therefore, exploitation high-performance magnesium-alloy has great importance.
In order to improve the intensity of magnesium alloy and improve its heat resistance.Research shows that can be with after rare earth is added in the magnesium alloy The intensity and heat resistance of magnesium alloy are significantly improved by means such as solution strengthening, dispersion-strengtherning and aging precipitation reinforcings.Rare earth It is the alloying/micro alloying element for developing novel high-performance magnesium alloy most potentiality to be exploited and practical value.Magnesium-rare earth Refer to the magnesium alloy containing rare earth element, since most of rare earth element is differed with the atomic size radius of magnesium in ± 15% range It is interior, there is larger solid solubility in magnesium, thus have the function of good solution strengthening and precipitation strength, it can effectively improve conjunction Payment organization and microstructure enhance alloy corrosion resistance and heat resistance, improve the mechanical property of Alloy At Room Temperature and high temperature.Rare earth simultaneously Elements Atom diffusivity is poor, has remarkable effect to improving magnesium alloy recrystallization temperature and slowing down recrystallization process.In addition, rare earth There are also good ageing strengthenings to act on for element, highly stable disperse phase particle can be precipitated, to increase substantially magnesium alloy Elevated temperature strength and creep resistance.The higher WE system of content of rare earth, Mg-Gd-Y-Zr system, Mg-Y-Gd-Zn- in magnesium-rare earth The alloys such as Zr system have obtained extensive concern because having good mechanical behavior under high temperature in aerospace field.
Summary of the invention
It is an object of the present invention to provide one kind by reasonably selecting alloying element and controlling its content and proportion, makes It is capable of forming the novel reinforced phase of high-volume fractional inside alloy, improves the room temperature of magnesium alloy and the high intensity of mechanical behavior under high temperature Rare earth-magnesium alloy material.
The technical solution that the present invention is taken to achieve the above object are as follows:
A kind of high strength rare earth-magnesium alloy materials include Dy element and Cu element, wherein the content of Dy element is 3.0- The content of 8.0wt%, Cu element is 2.0-5.0wt%.Novel reinforced phase (Mg is produced by specific technique10Dy1Cu1 Phase), this can mutually significantly improve the room temperature and mechanical behavior under high temperature of magnesium alloy.
Preferably, rare earth-magnesium alloy material also includes the Sn element of 0.5-2.0wt%.The addition of Sn element can be effective Ground promotes Mg10Dy1Cu1The generation of phase.
More preferably, the ingredient and mass percent of rare earth-magnesium alloy material are as follows: Sn:0.5-2.0wt%;Dy:3.0- 8.0wt%;Cu:2.0-5.0wt%, remaining is Mg and inevitable impurity;It is inevitable in the rare earth-magnesium alloy material Impurity content≤0.03wt%.The present invention is made in alloy by reasonably selecting alloying element and controlling its content and proportion Portion is capable of forming the Mg of high-volume fractional10Dy1Cu1Phase, this is mutually the novel reinforced phase of one of magnesium alloy system, can be significant The room temperature and mechanical behavior under high temperature for improving magnesium alloy have prepared high-intensitive ultralight rare earth-magnesium alloy material, while Sn element Addition can be effectively facilitated Mg10Dy1Cu1The generation of phase significantly improves the room temperature and mechanical behavior under high temperature of magnesium alloy.
Preferably, the weight ratio of Dy element and Cu element is 1:0.3-0.6 in rare earth-magnesium alloy material, rare-earth and Mg is closed The reasonable weight ratio of Dy element and Cu element can be in casting process to the maximum extent by Mg in golden material10Dy1Cu1Mutually introduce Into alloy substrate, in addition, Dy element also occurs that the substitution of atom in solid solution, phase can also occur for atom site in alloy phase Mutually replace, oversaturated solid solution can be obtained, form comparatively fine particle, play the effect of dispersion-strengtherning, improves and close The intensity of golden material, greatly push rare earth-magnesium alloy material alloys engineer application, while can effectively purify the H in melt, O, the elements such as S, and intermetallic compound can be formed with elements such as poisonous metal Fe, Ni, Cu in melt, form highdensity gold The density of compound between category, the density ratio alloy melt of the compound is big, is deposited on melt bottom, reduces impurity member in alloy The content of the elements such as plain Fe, Ni, Cu, to achieve the purpose that remove impurity and improve alloy corrosion resistance energy.
Preferably, the yield strength of rare earth-magnesium alloy material be 360-400MPa, tensile strength 390-420MPa, Elongation percentage 6.0-9.0%.
Preferably, yield strength of the rare earth-magnesium alloy material at 300 DEG C is 280-320MPa, tensile strength is 300-340MPa, elongation percentage 12.0-16.0%.
It can make to be capable of forming the novel strong of high-volume fractional inside alloy it is another object of the present invention to provide a kind of Change phase (Mg10Dy1Cu1Phase), significantly improve the room temperature of magnesium alloy and high strength rare earth-magnesium alloy materials of mechanical behavior under high temperature Preparation method.
The technical solution that the present invention is taken to achieve the above object are as follows:
A kind of preparation method of high strength rare earth-magnesium alloy materials, including,
Raw metal melting after preheating is cast into obtain as cast condition rare earth-magnesium alloy;
By the processing of obtained as cast condition rare earth-magnesium alloy homogeneity;
Homogeneity treated rare earth-magnesium alloy is subjected to hot extrusion.
Preferably, the specific steps of casting are as follows:
Under the action of protecting gas, Mg, Cu, Mg-Sn intermediate alloy and Mg-Dy alloy are cast after melting, obtained dilute Soil-Mg alloy castings.
Preferably, homogeneity treatment temperature is 220-250 DEG C, soaking time 8-10h.After rare earth-magnesium alloy condensation Tissue be in different degrees of nonequilibrium condition, be primarily present microsegregation, influence the performance of rare earth-magnesium alloy, carry out equal When homogenizing processing, element in alloy carries out solid-state diffusion, can eliminate or mitigate the defect of alloy so that the chemistry of alloy at Point and microstructure homogenization, so as to improve the performance of rare earth-magnesium alloy.
Preferably, the extruding temperature of hot extrusion is 250-300 DEG C, extruding rate 1.0-1.5m/min, extrusion ratio 20- 25%.In hot extrusion process, the tissue defects (such as shrinkage porosite, shrinkage cavity, stomata) generated in casting process can be improved, increased The consistency of alloy eliminates the segregation that part generates in casting process, while according to particle stimulated Nucleation principle, Mg10Dy1Cu1Hardening constituent can promote dynamic recrystallization tiny in alloy brilliant in hot extrusion process The generation of grain, further improves the intensity and plasticity of the rare earth-magnesium alloy material.
The invention has the benefit that 1) composition proportion of rare earth-magnesium alloy material of the present invention and preparation method phase interworking It closes, the Mg for being capable of forming high-volume fractional inside alloy can be made10Dy1Cu1Xiang Xiang, this is mutually that one of magnesium alloy system is novel Hardening constituent can significantly improve the room temperature and mechanical behavior under high temperature of magnesium alloy;2) Sn element in rare earth-magnesium alloy material of the present invention Addition can promote novel reinforced phase Mg10Dy1Cu1The generation of phase.
Present invention employs above-mentioned technical proposals to provide a kind of high strength rare earth-magnesium alloy materials and preparation method thereof, more The deficiencies in the prior art, reasonable design, easy operation are mended.
Detailed description of the invention
Fig. 1 is the micro-organization chart of the As-extruded rare earth-magnesium alloy of the embodiment of the present invention 1.
Specific embodiment
The terms "include", "comprise" used herein, " having ", " having ", " containing " or its any other variant are intended to Cover non-exclusionism includes.For example, composition, technique, method, product or equipment comprising a series of elements might not be only It is limited to those elements, but these compositions, technique, method, product or the not expressly listed element of equipment can also be included Or intrinsic other element.
The embodiment that term "comprising" is intended to include term " substantially by ... form " and " consist of " is covered. Similarly, term " substantially by ... form " is intended to include the embodiment that term " consist of " is covered.
When with range, preferred scope or a series of upper limit preferred values and lower preferable values provide quantity, concentration or other number When value or parameter, it should be understood that it is specifically disclosed by any biggish range limit or preferred value and any lesser range limit Or any pair of numerical value of preferred value is formed by all ranges, regardless of whether these ranges are disclosed respectively.For example, when retouching When stating the range of " 1 to 5 ", described range be should be interpreted that including " 1 to 4 ", " 1 to 3 ", " 1 to 2 ", " 1 to 2 and 4 to 5 ", " 1 To the ranges such as 3 and 5 ".Unless otherwise indicated, in place of numberical range is described herein, the range is intended to include range endpoints With all integers and score in range.
The exemplary embodiments for embodying inventive features and advantage will describe in detail in the following description.It should be understood that this hair It is bright to have various variations in different embodiments, it neither departs from the scope of the present invention, and description therein is at this It is to be illustrated as being used in matter, rather than to limit the present invention.
A kind of high strength rare earth-magnesium alloy materials disclosed in the present application include Dy element and Cu element, wherein Dy element Content be 3.0-8.0wt%, the content of Cu element is 2.0-5.0wt%.Novel reinforced phase is produced by specific technique (Mg10Dy1Cu1Phase), this can mutually significantly improve the room temperature and mechanical behavior under high temperature of magnesium alloy.
Above-mentioned rare earth-magnesium alloy material also includes the Sn element of 0.5-2.0wt%.The addition of Sn element can be effectively facilitated Mg10Dy1Cu1The generation of phase.
The ingredient and mass percent of above-mentioned rare earth-magnesium alloy material are as follows: Sn:0.5-2.0wt%;Dy:3.0- 8.0wt%;Cu:2.0-5.0wt%, remaining is Mg and inevitable impurity;It is inevitable in the rare earth-magnesium alloy material Impurity content≤0.03wt%.The present invention is made in alloy by reasonably selecting alloying element and controlling its content and proportion Portion is capable of forming the Mg of high-volume fractional10Dy1Cu1Phase, this is mutually the novel reinforced phase of one of magnesium alloy system, can be significant The room temperature and mechanical behavior under high temperature for improving magnesium alloy have prepared high-intensitive ultralight rare earth-magnesium alloy material, while Sn element Addition can be effectively facilitated Mg10Dy1Cu1The generation of phase significantly improves the room temperature and mechanical behavior under high temperature of magnesium alloy.
The weight ratio of Dy element and Cu element is 1:0.3-0.6, rare earth-magnesium alloy material in above-mentioned rare earth-magnesium alloy material The reasonable weight ratio of Dy element and Cu element can be in casting process to the maximum extent by Mg in material10Dy1Cu1Mutually it is introduced into conjunction In golden α phase matrix, in addition, Dy element also occurs that the substitution of atom in solid solution, phase can also occur for atom site in alloy phase Mutually replace, oversaturated solid solution can be obtained, form comparatively fine particle, play the effect of dispersion-strengtherning, improves and close The intensity of golden material, greatly push rare earth-magnesium alloy material alloys engineer application, while can effectively purify the H in melt, O, the elements such as S, and intermetallic compound can be formed with elements such as poisonous metal Fe, Ni, Cu in melt, form highdensity gold The density of compound between category, the density ratio alloy melt of the compound is big, is deposited on melt bottom, reduces impurity member in alloy The content of the elements such as plain Fe, Ni, Cu, to achieve the purpose that remove impurity and improve alloy corrosion resistance energy.
The yield strength of above-mentioned rare earth-magnesium alloy material is 360-400MPa, tensile strength 390-420MPa, elongation percentage 6.0-9.0%.
Yield strength of the above-mentioned rare earth-magnesium alloy material at 300 DEG C is 280-320MPa, tensile strength 300- 340MPa, elongation percentage 12.0-16.0%.
A kind of preparation method of high strength rare earth-magnesium alloy materials is also disclosed in the application, including,
Raw metal melting after preheating is cast into obtain as cast condition rare earth-magnesium alloy;
By the processing of obtained as cast condition rare earth-magnesium alloy homogeneity;
Homogeneity treated rare earth-magnesium alloy is subjected to hot extrusion.This application composition proportion and preparation method can make to close The golden internal Mg for being capable of forming high-volume fractional10Dy1Cu1Phase, this is mutually the novel reinforced phase of one of magnesium alloy system, can be with The room temperature and mechanical behavior under high temperature for significantly improving magnesium alloy have prepared high-intensitive ultralight rare earth-magnesium alloy material.
The specific steps of above-mentioned casting are as follows:
Under the action of protecting gas, Mg, Cu, Mg-Sn intermediate alloy and Mg-Dy intermediate alloy are added in smelting furnace, heating To 750-770 DEG C, casts after melting 1-2h, obtain rare earth-magnesium alloy casting.
Above-mentioned homogeneity treatment temperature is 220-250 DEG C, soaking time 8-10h.The condensed tissue of rare earth-magnesium alloy In different degrees of nonequilibrium condition, it is primarily present microsegregation, influences the performance of rare earth-magnesium alloy, is carried out at homogenization When reason, the element in alloy carries out solid-state diffusion, the defect of alloy can be eliminated or mitigate, so that the chemical component and group of alloy Homogenization is knitted, so as to improve the performance of rare earth-magnesium alloy.
The extruding temperature of above-mentioned hot extrusion is 250-300 DEG C, extruding rate 1.0-1.5m/min, extrusion ratio 20-25%. In hot extrusion process, the tissue defects (such as shrinkage porosite, shrinkage cavity, stomata) generated in casting process can be improved, increase alloy Consistency, eliminate the segregation that generates in casting process of part, while according to particle stimulated Nucleation principle, Mg10Dy1Cu1Hardening constituent can promote dynamic recrystallization tiny in alloy brilliant in hot extrusion process The generation of grain, further improves the intensity and plasticity of the rare earth-magnesium alloy material.
Present invention is further described in detail with reference to embodiments:
Embodiment 1:
A kind of high strength rare earth-magnesium alloy materials, the ingredient comprising following weight percent: Sn:0.5wt%;Dy: 3.8wt%;Cu:2.0wt%, remaining is Mg and inevitable impurity;Inevitable impurity in rare earth-magnesium alloy material Content≤0.03wt%.
The yield strength of above-mentioned rare earth-magnesium alloy material is 378MPa, tensile strength 396MPa, elongation percentage 8.9%;? Yield strength at 300 DEG C is 290MPa, tensile strength 315MPa, elongation percentage 15.8%.
A kind of preparation method of high strength rare earth-magnesium alloy materials, including,
1) the raw metal melting after preheating is cast into obtain as cast condition rare earth-magnesium alloy, specifically:
Under the action of protecting gas, it will cast, obtain after Mg, Cu, Mg-Sn intermediate alloy and the melting of Mg-Dy intermediate alloy Rare earth-magnesium alloy casting;
2) by the processing of obtained as cast condition rare earth-magnesium alloy homogeneity, homogeneity treatment temperature is 220 DEG C, soaking time For 8h;
3) homogeneity treated rare earth-magnesium alloy is subjected to hot extrusion, squeezing temperature is 250 DEG C, extruding rate 1.0m/ Min, extrusion ratio 20%, the microstructure picture of As-extruded alloy from figure as shown in Figure 1, can obviously observe high volume point Number Mg10Dy1Cu1Phase,
Embodiment 2:
A kind of high strength rare earth-magnesium alloy materials, the ingredient comprising following weight percent: Sn:1.5wt%;Dy: 5.0wt%;Cu:3.5wt%, remaining is Mg and inevitable impurity;Inevitable impurity in rare earth-magnesium alloy material Content≤0.03wt%.
The yield strength of above-mentioned rare earth-magnesium alloy material is 386MPa, tensile strength 412MPa, elongation percentage 6.8%;? Yield strength at 300 DEG C is 306MPa, tensile strength 320MPa, elongation percentage 12.5%.
A kind of preparation method of high strength rare earth-magnesium alloy materials, including,
1) the raw metal melting after preheating is cast into obtain as cast condition rare earth-magnesium alloy, specifically:
Under the action of protecting gas, it will cast, obtain after Mg, Cu, Mg-Sn intermediate alloy and the melting of Mg-Dy intermediate alloy Rare earth-magnesium alloy casting;
2) by the processing of obtained as cast condition rare earth-magnesium alloy homogeneity, homogeneity treatment temperature is 235 DEG C, soaking time For 9h;
3) homogeneity treated rare earth-magnesium alloy is subjected to hot extrusion, squeezing temperature is 270 DEG C, extruding rate 1.2m/ Min, extrusion ratio 22%.
Embodiment 3:
A kind of high strength rare earth-magnesium alloy materials, the ingredient comprising following weight percent: Sn:2.0wt%;Dy: 8.0wt%;Cu:5.0wt%, remaining is Mg and inevitable impurity;Inevitable impurity in rare earth-magnesium alloy material Content≤0.03wt%.
The yield strength of above-mentioned rare earth-magnesium alloy material is 396MPa, tensile strength 420MPa, elongation percentage 7.8%;? Yield strength at 300 DEG C is 318MPa, tensile strength 336MPa, elongation percentage 16.0%.
A kind of preparation method of high strength rare earth-magnesium alloy materials, including,
1) the raw metal melting after preheating is cast into obtain as cast condition rare earth-magnesium alloy, specifically:
Under the action of protecting gas, it will cast, obtain after Mg, Cu, Mg-Sn intermediate alloy and the melting of Mg-Dy intermediate alloy Rare earth-magnesium alloy casting;
2) by the processing of obtained as cast condition rare earth-magnesium alloy homogeneity, homogeneity treatment temperature is 250 DEG C, soaking time For 10h;
3) homogeneity treated rare earth-magnesium alloy is subjected to hot extrusion, squeezing temperature is 300 DEG C, extruding rate 1.5m/ Min, extrusion ratio 25%.
The prior art of routine techniques dawn known to those skilled in the art in above-described embodiment, therefore herein no longer in detail It repeats.
The above embodiments are only used to illustrate the present invention, and not limitation of the present invention, the ordinary skill people of this field Member can also make a variety of changes and modification without departing from the spirit and scope of the present invention.Therefore, all equivalent Technical solution also belong to scope of the invention, scope of patent protection of the invention should be defined by the claims.

Claims (10)

1. a kind of high strength rare earth-magnesium alloy materials include Dy element and Cu element, it is characterised in that: the Dy element contains Amount is 3.0-8.0wt%, and the content of Cu element is 2.0-5.0wt%.
2. a kind of high strength rare earth-magnesium alloy materials according to claim 1, it is characterised in that: the rare earth-magnesium alloy Material also includes the Sn element of 0.5-2.0wt%.
3. a kind of high strength rare earth-magnesium alloy materials according to claim 2, it is characterised in that: the rare earth-magnesium alloy The ingredient and mass percent of material are as follows: Sn:0.5-2.0wt%;Dy:3.0-8.0wt%;Cu:2.0-5.0wt%, remaining For Mg and inevitable impurity;Content≤0.03wt% of inevitable impurity in the rare earth-magnesium alloy material.
4. a kind of high strength rare earth-magnesium alloy materials according to claim 1, it is characterised in that: the rare earth-magnesium alloy The weight ratio of Dy element and Cu element is 1:0.3-0.6 in material.
5. a kind of high strength rare earth-magnesium alloy materials according to claim 1 or 2 or 3 or 4, it is characterised in that: described dilute Soil-magnesium alloy materials yield strength is 360-400MPa, tensile strength 390-420MPa, elongation percentage 6.0-9.0%.
6. a kind of high strength rare earth-magnesium alloy materials according to claim 1 or 2 or 3 or 4, it is characterised in that: described dilute Yield strength of the soil-magnesium alloy materials at 300 DEG C is 280-320MPa, tensile strength 300-340MPa, elongation percentage 12.0- 16.0%.
7. a kind of preparation method of such as described in any item high strength rare earth-magnesium alloy materials of claims 1-7, feature exist In: including,
Raw metal melting after preheating is cast into obtain as cast condition rare earth-magnesium alloy;
By the processing of obtained as cast condition rare earth-magnesium alloy homogeneity;
Homogeneity treated rare earth-magnesium alloy is subjected to hot extrusion.
8. a kind of preparation method of high strength rare earth-magnesium alloy materials according to claim 7, it is characterised in that: described The specific steps of casting are as follows: under the action of protecting gas, after Mg, Cu, Mg-Sn intermediate alloy and the melting of Mg-Dy intermediate alloy Casting, obtains rare earth-magnesium alloy casting.
9. a kind of preparation method of high strength rare earth-magnesium alloy materials according to claim 7, it is characterised in that: described Homogeneity treatment temperature is 220-250 DEG C, soaking time 8-10h.
10. a kind of preparation method of high strength rare earth-magnesium alloy materials according to claim 7, it is characterised in that: described The extruding temperature of hot extrusion is 250-300 DEG C, extruding rate 1.0-1.5m/min, extrusion ratio 20-25%.
CN201811384339.0A 2018-11-20 2018-11-20 High-strength rare earth-magnesium alloy material and preparation method thereof Active CN109182865B (en)

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