CN109252080A - A kind of high temperature resistant rare earth-magnesium alloy material and preparation method thereof - Google Patents
A kind of high temperature resistant rare earth-magnesium alloy material and preparation method thereof Download PDFInfo
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- CN109252080A CN109252080A CN201811377446.0A CN201811377446A CN109252080A CN 109252080 A CN109252080 A CN 109252080A CN 201811377446 A CN201811377446 A CN 201811377446A CN 109252080 A CN109252080 A CN 109252080A
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- rare earth
- magnesium alloy
- high temperature
- temperature resistant
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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
- C22C23/06—Alloys based on magnesium with a rare earth metal 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 present invention provides a kind of high temperature resistant rare earth-magnesium alloy material and preparation method thereof, belongs to structural metallic materials field, and the rare earth-magnesium alloy material composition and its proportion are as follows: Sn:0.5-2.0wt.%；Y:2.0-4.0wt.%；Er:2.0-4.0wt.%, Ni:3-5wt.%, remaining is Mg, and other impurity content≤0.03wt.% are inevitably added.The alloy is prepared by casting+homogeneity processing+rolling.The present invention forms a kind of novel hardening constituent (Mg in rare earth-magnesium alloy12Er (Y) Ni phase), this can mutually improve the intensity and plasticity of rare earth-magnesium alloy simultaneously, also, this mutually has high thermal stability, can assign rare earth-magnesium alloy good heat resistance.Gained alloy is a kind of high temperature resistant rare earth-magnesium alloy material.
Description
Technical field
The invention belongs to structural metallic materials fields, and in particular to a kind of high temperature resistant rare earth-magnesium alloy material and its preparation
Method.
Background technique
As most light structural metallic materials, magnesium alloy is by feat of high specific strength, specific stiffness and good electromagnetic screen
It covers performance and presents wide application prospect in the fields such as auto industry, aerospace, weaponry and electronics 3C.But
So far, most of magnesium alloy materials using temperature when being increased, intensity often sharp fall, therefore is limited significantly
Application of the magnesium alloy under high temperature operating conditions.For example, at present in the automotive industry most widely used AZ (refer mainly to AZ31,
AZ91) and the serial magnesium alloy of AM (referring mainly to AM50, AM60), they have certain intensity and plasticity at room temperature, but work as
When being more than 150 DEG C using temperature, their intensity meeting sharp fall, therefore, this kind of alloy can only be to manufacture auto meter
The components such as disk, manual transmission.Currently, the heat resistance magnesium alloy industrially used is mainly WE series.It accounts for and bright etc. reports WE54
The mechanical property of alloy at room temperature are as follows: yield strength 182-205MPa, tensile strength 272-305MPa, elongation are
3.8%-4.3%.High-temperature behavior of the alloy at 250 DEG C are as follows: yield strength 165Mpa, tensile strength 225MPa stretch
Long rate (accounts for bright, Wang Wei, Gao Dan, Zhang Jie, Jiang Zhengao, Li Yongheng heat-resistance high-strength magnesium alloy WE54 composition range optimization for 7.8%
Cast .60 (2011) 126-128).Although WE54 alloy has certain room temperature and 250 DEG C of elevated temperature strengths, resultant force
Learning performance, it still needs further improvement.
Summary of the invention
It is an object of the present invention to provide one kind to form a kind of novel reinforced phase (Mg in the magnesium alloy12Er(Y)Ni
Phase), the intensity and plasticity of magnesium alloy, and Mg can be improved simultaneously12Er (Y) Ni phase has high thermal stability, can assign
The high temperature resistant rare earth-magnesium alloy material of the good heat resistance of magnesium alloy.
The technical solution that the present invention is taken to achieve the above object are as follows:
A kind of high temperature resistant rare earth-magnesium alloy material includes two kinds of rare earth elements of Y and Er, wherein the total content of rare earth element
For 4.0-8.0wt%.
Preferably, including the Ni element of 3.0-5.0wt% in alloy.
Preferably, including the Sn element of 0.5-2.0wt% in alloy.The addition of Sn element can further promote
Mg12The generation of Er (Y) Ni phase.
Preferably, magnesium alloy materials include the ingredient of following weight percent: Sn:0.5-2.0wt%；Y:2.0-
4.0wt%；Er:2.0-4.0wt%, Ni:3.0-5.0wt%, remaining is Mg, be inevitably added other impurity contents≤
0.03wt%.The present invention forms one by reasonably selecting alloying element and controlling its content and proportion in rare earth-magnesium alloy
The novel Mg of kind12Er (Y) Ni phase, this is mutually the novel reinforced phase of one of rare earth-magnesium alloy, is moulded in rare earth-magnesium alloy
Property deformation during, this can mutually improve the intensity and plasticity of rare earth-magnesium alloy simultaneously, in addition, Mg12Er (Y) Ni phase has
High thermal stability can assign rare earth-magnesium alloy good heat resistance.
Preferably, the weight ratio of rare earth element and Ni element is 1:0.3-0.6 in rare earth-magnesium alloy material.Rare-earth and Mg
The reasonable weight ratio of rare earth element and Ni element can be in casting process to the maximum extent by Mg in alloy material12Er(Y)Ni
Mutually it is introduced into alloy substrate.
Preferably, the yield strength of magnesium alloy materials at room temperature is 240-280MPa, tensile strength 320-
360MPa, elongation percentage 6.0%-9.0%.
Preferably, yield strength of the magnesium alloy materials at 250 DEG C is 225-260MPa, tensile strength 260-
310MPa, elongation percentage 12%-16%.
It is another object of the present invention to provide assign under conditions of a kind of mechanical property that can improve rare earth-magnesium alloy
The preparation method of the high temperature resistant rare earth-magnesium alloy material of the good heat resistance of rare earth-magnesium alloy.
The technical solution that the present invention is taken to achieve the above object are as follows:
A kind of preparation method of high temperature resistant rare earth-magnesium alloy material, 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 multi- pass rolling, n >=2 time.
Preparation method of the present invention can form a kind of novel Mg in rare earth-magnesium alloy12Er (Y) Ni phase, this is mutually dilute
The novel reinforced phase of one of soil-magnesium alloy, during rare earth-magnesium alloy is plastically deformed, this can mutually be mentioned simultaneously
The intensity and plasticity of high rare earth-magnesium alloy, in addition, Mg12Er (Y) Ni phase has high thermal stability, can assign rare-earth and Mg
The good heat resistance of alloy.
Above-mentioned homogeneity treatment temperature is 220-250 DEG C, soaking time 8-10h.The condensed tissue of as-cast magnesium alloy
In different degrees of nonequilibrium condition, it is primarily present microsegregation, influences the performance of magnesium alloy, when carrying out Homogenization Treatments,
Element in alloy carries out solid-state diffusion, the defect of magnesium alloy can be eliminated or mitigate, so that the chemical component and tissue of alloy
Homogenization, so as to improve the performance of magnesium alloy.
The step of the rolling are as follows: homogeneity treated rare earth-magnesium alloy is subjected to multi- pass rolling, rolling temperature is
320-360 DEG C, drafts 20-25%.Homogeneity processing: 250 DEG C of heat preservation 0.5-2h is carried out between per pass.The rolling is advantageous
Uniformly tiny crystal grain is formed in magnesium alloy, in plastic history, uniformly on the one hand tiny crystal grain is conducive to alloy
Plastic deformation, on the one hand increase the quantity of crystal boundary, improve the intensity of magnesium alloy.
The invention has the benefit that
1) a kind of novel Mg is formd in rare earth-magnesium alloy of the present invention12Er (Y) Ni hardening constituent, can improve dilute simultaneously
Soil-magnesium alloy intensity and plasticity, and Mg12Er (Y) Ni phase has high thermal stability, and it is good can to assign rare earth-magnesium alloy
Good heat resistance；
2) addition of Sn element can further promote Mg in rare earth-magnesium alloy of the present invention12The generation of Er (Y) Ni phase,
It can assign magnesium alloy good heat resistance while improving the intensity and plasticity of magnesium alloy.
Present invention employs above-mentioned technical proposals to provide a kind of high temperature resistant rare earth-magnesium alloy material 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 that the microscopic structure of the rolling state Mg-0.5Sn-4.0Er-2.0Y-3.0Ni alloy of the embodiment of the present invention 1 is shone
Piece.
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.
The application discloses a kind of high temperature resistant rare earth-magnesium alloy material, includes two kinds of rare earth elements of Y and Er, wherein rare earth member
The total content of element is 4.0-8.0wt%.
It include the Ni element of 3.0-5.0wt% in above-mentioned alloy.
It include the Sn element of 0.5-2.0wt% in above-mentioned alloy.The addition of Sn element can further promote Mg12Er(Y)
The generation of Ni phase.
Above-mentioned magnesium alloy materials include the ingredient of following weight percent: Sn:0.5-2.0wt%；Y:2.0-4.0wt%；
Er:2.0-4.0wt%, Ni:3.0-5.0wt%, remaining is Mg, and other impurity content≤0.03wt% are inevitably added.
The present invention is formd a kind of novel by reasonably selecting alloying element and controlling its content and proportion in rare earth-magnesium alloy
Mg12Er (Y) Ni phase, this is mutually the novel reinforced phase of one of rare earth-magnesium alloy, is plastically deformed in rare earth-magnesium alloy
In the process, this can mutually improve the intensity and plasticity of rare earth-magnesium alloy simultaneously, in addition, Mg12Er (Y) Ni phase has high heat
Stability can assign rare earth-magnesium alloy good heat resistance.
The weight ratio of rare earth element and Ni element is 1:0.3-0.6 in above-mentioned rare earth-magnesium alloy material.Rare earth-magnesium alloy
The reasonable weight ratio of rare earth element and Ni element can be in casting process to the maximum extent by Mg in material12Er (Y) Ni coupling
Enter into alloy substrate.
The yield strength of above-mentioned magnesium alloy materials at room temperature is 240-280MPa, and tensile strength 320-360MPa prolongs
Stretch rate 6.0%-9.0%；Yield strength of the magnesium alloy materials at 250 DEG C is 225-260MPa, tensile strength 260-
310MPa, elongation percentage 12%-16%.
A kind of preparation method of high temperature resistant rare earth-magnesium alloy material 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 carried out multi-pass to roll twice, multi-pass >=2 time.
The preparation method can form a kind of novel Mg in rare earth-magnesium alloy12Er (Y) Ni phase, this is mutually rare-earth and Mg
The novel reinforced phase of one of alloy, during rare earth-magnesium alloy is plastically deformed, this can mutually improve dilute simultaneously
Soil-magnesium alloy intensity and plasticity, in addition, Mg12Er (Y) Ni phase has high thermal stability, can assign rare earth-magnesium alloy
Good heat resistance.
Above-mentioned homogeneity treatment temperature is 220-250 DEG C, soaking time 8-10h.The condensed tissue of as-cast magnesium alloy
In different degrees of nonequilibrium condition, it is primarily present microsegregation, influences the performance of magnesium alloy, when carrying out Homogenization Treatments,
Element in alloy carries out solid-state diffusion, the defect of magnesium alloy can be eliminated or mitigate, so that the chemical component and tissue of alloy
Homogenization, so as to improve the performance of magnesium alloy.
The step of the rolling are as follows: homogeneity treated rare earth-magnesium alloy is subjected to multi- pass rolling, rolling temperature is
320-360 DEG C, drafts 20-25%.Homogeneity processing: 250 DEG C of heat preservation 0.5-2h is carried out between per pass.The rolling is advantageous
Uniformly tiny crystal grain is formed in magnesium alloy, in plastic history, uniformly on the one hand tiny crystal grain is conducive to alloy
Plastic deformation, on the one hand increase the quantity of crystal boundary, improve the intensity of magnesium alloy.
Present invention is further described in detail with reference to embodiments:
Embodiment 1:
A kind of high temperature resistant rare earth-magnesium alloy material, the ingredient comprising following weight percent: Sn:0.5wt%；Y:
2.0wt%；Er:4.0wt%, Ni:3wt%, remaining is Mg, and other impurity content≤0.03wt% are inevitably added.
A kind of preparation method of high temperature resistant rare earth-magnesium alloy material, including,
1) the raw metal melting after preheating is cast into obtain as cast condition rare earth-magnesium alloy；
2) by the processing of obtained as cast condition rare earth-magnesium alloy homogeneity；
3) homogeneity treated rare earth-magnesium alloy is subjected to 2 passes；Rolling temperature is 340 DEG C, and drafts is
22%, per pass between carry out homogeneity processing: 250 DEG C of heat preservation 1h.
As-extruded rolls the microstructure picture of state Mg-0.5Sn-4.0Er-2.0Y-3.0Ni alloy as shown in Figure 1, from figure
In it can be seen that a large amount of Mg12The crystal grain of Er (Y) Ni phase and fine uniform.
The yield strength of above-mentioned rare earth-magnesium alloy material at room temperature is 280MPa, tensile strength 360MPa, elongation percentage
9.0%；Yield strength at 250 DEG C is 260MPa, tensile strength 310MPa, elongation percentage 16%.
Embodiment 2:
A kind of high temperature resistant rare earth-magnesium alloy material, the ingredient comprising following weight percent: Sn:1.3wt%；Y:
3.0wt%；Er:3.0wt%, Ni:4.0wt%, remaining is Mg, and other impurity content≤0.03wt% are inevitably added.
A kind of preparation method of high temperature resistant rare earth-magnesium alloy material, including,
1) the raw metal melting after preheating is cast into obtain as cast condition rare earth-magnesium alloy；
2) by the processing of obtained as cast condition rare earth-magnesium alloy homogeneity；
3) homogeneity treated rare earth-magnesium alloy is subjected to 3 passes；Rolling temperature is 320 DEG C, and drafts is
20%, per pass between carry out homogeneity processing: 250 DEG C of heat preservation 0.5h.
The yield strength of above-mentioned rare earth-magnesium alloy material at room temperature is 268MPa, tensile strength 351MPa, elongation percentage
7.8%；Yield strength at 250 DEG C is 252MPa, tensile strength 300MPa, elongation percentage 15.2%.
Embodiment 3:
A kind of high temperature resistant rare earth-magnesium alloy material, the ingredient comprising following weight percent: Sn:2.0wt%；Y:
4.0wt%；Er:4.0wt%, Ni:4.8wt%, remaining is Mg, and other impurity content≤0.03wt% are inevitably added.
A kind of preparation method of high temperature resistant rare earth-magnesium alloy material, including,
1) the raw metal melting after preheating is cast into obtain as cast condition rare earth-magnesium alloy；
2) by the processing of obtained as cast condition rare earth-magnesium alloy homogeneity；
3) homogeneity treated rare earth-magnesium alloy is subjected to 2 passes；Rolling temperature is 360 DEG C, and drafts is
25%, per pass between carry out homogeneity processing: 250 DEG C of heat preservation 2h.
The yield strength of above-mentioned rare earth-magnesium alloy material at room temperature is 275MPa, tensile strength 337MPa, elongation percentage
8.1%；Yield strength at 250 DEG C is 258MPa, tensile strength 297MPa, elongation percentage 14.5%.
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 temperature resistant rare earth-magnesium alloy material, it is characterised in that: include two kinds of rare earth elements of Y and Er, the rare earth element
Total content be 4.0-8.0wt%.
2. a kind of high temperature resistant rare earth-magnesium alloy material according to claim 1, it is characterised in that: include 3.0- in alloy
The Ni element of 5.0wt%.
3. a kind of high temperature resistant rare earth-magnesium alloy material according to claim 1, it is characterised in that: include 0.5- in alloy
The Sn element of 2.0wt%.
4. a kind of high temperature resistant rare earth-magnesium alloy material according to claim 1, it is characterised in that: the magnesium alloy materials
Ingredient comprising following weight percent: Sn:0.5-2.0wt%；Y:2.0-4.0wt%；Er:2.0-4.0wt%, Ni:3.0-
5.0wt%, remaining is Mg, and other impurity content≤0.03wt% are inevitably added.
5. a kind of high temperature resistant rare earth-magnesium alloy material according to Claims 2 or 3 or 4, it is characterised in that: the rare earth-
The weight ratio of rare earth element and Ni element is 1:0.3-0.6 in magnesium alloy materials.
6. a kind of high temperature resistant rare earth-magnesium alloy material according to claim 1 or 2 or 3 or 4, it is characterised in that: the magnesium
The yield strength of alloy material at room temperature is 240-280MPa, tensile strength 320-360MPa, elongation percentage 6.0%-
9.0%.
7. a kind of high temperature resistant rare earth-magnesium alloy material according to claim 1 or 2 or 3 or 4, it is characterised in that: the magnesium
Yield strength of the alloy material at 250 DEG C is 225-260MPa, tensile strength 260-310MPa, elongation percentage 12%-16%.
8. a kind of preparation method of such as described in any item high temperature resistant 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；Obtained as cast condition rare earth-magnesium alloy is homogeneous
Change processing；
Homogeneity treated rare earth-magnesium alloy is subjected to multi- pass rolling (n >=2).
9. a kind of preparation method of high temperature resistant rare earth-magnesium alloy material according to claim 8, 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 temperature resistant rare earth-magnesium alloy material according to claim 8, it is characterised in that: will be even
Matterization treated rare earth-magnesium alloy carries out multi- pass rolling, and rolling temperature is 320-360 DEG C, drafts 20-25%, institute
State progress homogeneity processing between per pass: 250 DEG C of heat preservation 0.5-2h.
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| US20100049299A1 (en) * | 2006-03-18 | 2010-02-25 | Acrostak Corp. Bvi | Magnesium-based alloy with improved combination of mechanical and corrosion characteristics |
| CN103060649A (en) * | 2013-01-16 | 2013-04-24 | 燕山大学 | Magnesium alloy sheet with high toughness at low temperature |
| CN103131925A (en) * | 2013-03-14 | 2013-06-05 | 河南科技大学 | High-strength heat-resisting composite rare earth magnesium alloy |
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