CN106435315A - Europium-contained high-strength casting magnesium alloy and preparation method thereof - Google Patents
Europium-contained high-strength casting magnesium alloy and preparation method thereof Download PDFInfo
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- CN106435315A CN106435315A CN201610905098.4A CN201610905098A CN106435315A CN 106435315 A CN106435315 A CN 106435315A CN 201610905098 A CN201610905098 A CN 201610905098A CN 106435315 A CN106435315 A CN 106435315A
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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
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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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Abstract
The invention discloses a europium-contained high-strength casting magnesium alloy and a preparation method thereof. The alloy is prepared from, by weight percentage, 1.0-6.0% of Zn, 1.0-6.0% of Gd, 1.0-3.0% of Y, 0.1-1.0% of Eu, 0.1-1.0% of Zr and the balance magnesium and impurities, and the sum of the impurities is equal to or smaller than 0.15%. According to the magnesium alloy, the addition of the element Gd and the element Y can generate precipitated phases which grow along a prism face and are distributed on a matrix in a dispersion manner, the addition of the element Eu can remarkably refine the precipitated phases and increase the density of the precipitated phases, and therefore the high-density precipitated phases can be formed when a small number of the elements Gd and the elements Y are added, the alloy strength is improved, and the raw material cost is reduced. The element Zn jointly acts with the element Gd and the element Y, a larger number of long-range order stacking structures can be formed, sliding of dislocated base faces can be hindered, the matrix is intensified, and the alloy strength is further improved.
Description
Technical field
The invention belongs to field of magnesium alloy, and in particular to a kind of high-strength cast magnesium alloy containing europium and preparation method thereof.
Background technology
With China's aerospace, the fast development of car industry, the light weight of the vehicles such as spacecraft and automobile is melted into
For the problem of urgent need to resolve, magnesium alloy is had broad application prospects as most promising light-alloy, and at present on automobile
Magnesium alloy component is essentially all die casting, in existing cast magnesium alloy, with being most widely used for the alloys such as AZ91D, AM50,
These magnesium alloys have good mechanical property, decay resistance and die casting performance.However, when operating temperature is more than 120 DEG C,
The croop property of these alloys drastically declines, and is therefore not used to produce car transmissions part.Existing at present automobile-used resistance to
Hot magnesium alloy mainly has Mg-Al-RE, Mg-Al-Ca, Mg-Zn-Al-Ca, Mg-Al-Ca-RE, Mg-Al-Sr, Mg-Al-Sn, Mg-
The heat resistance magnesium alloys such as Zn-Al, Mg-Zn-RE, Mg-Zn-Si and Mg-Zn-Sn.
Rare earth element be considered as improving the important element of magnesium alloy strength, such as having obtained the WE54 of commercial applications
And WE43.Due to their excellent specific strengths and good heat resistance, to the field such as space flight and aviation, war industry and racing car it is
Very attractive.Wherein, Mg-Gd system alloy is because having excellent aging hardening behavior, and at 250 DEG C with good anti-
Croop property, becomes one of most potential alloy.In recent years, in order to improve its mechanical property further and reduce rare earth element
The consumption of Gd, the element such as Y, Nd, Sm, Sc and Zn is added in the middle of Mg-Gd alloy, presents the trend of diverse development.
《The Microstructure evolution of Mg-Gd-Y-Zr (- Ca) alloy, performance and fracture behaviour research》(2007, Shanghai traffic
University Ph.D. Dissertation) microstructure and the mechanical property of Mg-Gd-Y-Zr alloy is have studied, which finds that the interpolation of Gd and Y can
The tensile property of magnesium alloy is significantly improved, Mg-10Gd-3Y-0.4Zr alloy is after peak value Ageing Treatment, and tensile strength, surrender are strong
Change and elongation percentage is respectively reached：370MPa, 241MPa and 4.0%.But face another problem again, rare earth Gd and Y's
Total addition level reaches 13mass.%, increased cost, limits industrial applications.So reducing always adding for rare earth Gd and Y
Dosage does not affect the technical problem that the performance of magnesium alloy is existing skilled person's urgent need to resolve again.
Content of the invention
In view of this, it is an object of the invention to provide a kind of high-strength cast magnesium alloy containing europium, by a small amount of gadolinium of interpolation
And yttrium, the disperse educt phase for prolonging prismatic surface growth is formed in magnesium alloy substrate, the addition of europium element can significantly refine analysis
Go out phase, reduce the size of precipitated phase, increase the density of precipitated phase, lift alloy strength.Additionally, zinc element is common with gadolinium and/or yttrium
With adding, the orderly stacking provisions of a large amount of long periods can be formed in intra-die, the structure has symbiosis and epibiosis, Neng Gouyou with Mg matrix
Effect hinders the basal slip of dislocation, further improve alloy strength.Present invention also offers the preparation method of above-mentioned alloy.This
The bright preparation method for additionally providing above-mentioned alloy.
For reaching above-mentioned purpose, the present invention specifically provides following technical scheme：
1st, high-strength cast magnesium alloy containing europium, each component is by weight percentage：Zn 1.0～6.0%, Gd 1.0～
6.0%, Y 1.0～3.0%, Eu 0.1～1.0%, Zr 0.1～1.0%, remaining is magnesium and impurity, impurity summation≤
0.15%.
Preferably, each component is by weight percentage：Zn 5.3%, Gd 5.4%, Y 2.7%, Eu 0.2%, Zr
0.41%, other impurity element summation≤0.15%, remaining is magnesium.
Preferably, each component is by weight percentage：Zn 2.2%, Gd 1.7%, Y 2.4%, Eu 0.4%, Zr
0.43%, other impurity element summation≤0.15%, balance of Mg.
Preferably, each component is by weight percentage：Zn 4.3%, Gd 3.5%, Y 1.8%, Eu 0.4%, Zr
0.32%, other impurity element summation≤0.15%, balance of Mg.
Preferably, each component is by weight percentage：Zn 3.1%, Gd 4.9%, Y 0.7%, Eu 0.7%, Zr
0.35%, other impurity element summation≤0.15%, balance of Mg.
Preferably, impurity element includes Fe, Cu, Ni.
Preferably, by weight percentage, Fe<0.005%, Cu<0.015%, Ni<0.002%.
2nd, the preparation method containing europium high-strength cast magnesium alloy, it is characterised in that concretely comprise the following steps：By pure magnesium plus
Heat adds technical pure Zn at 700 DEG C to after be completely melt, after melt temperature reaches 720 DEG C, adds Mg-Gd, Mg-Y and Mg-
Eu intermediate alloy, after intermediate alloy fusing, melt temperature gos up to 780 DEG C to add Mg-Zr intermediate alloy, and stirring 2min makes
Which fully melts, then is warming up to 780 DEG C, is cooled to 750 DEG C after insulation 20min, and refine 6min stands 20min after refine, treats gold
Category liquid temp is cooled to 740 DEG C and skims surface scum is cast.
The beneficial effects of the present invention is：The addition of magnesium alloy disclosed by the invention wherein Gd and Y element can be produced prolongs rib
Cylinder growth, in the precipitated phase of matrix Dispersed precipitate, the addition of Eu can significantly refine this precipitated phase, increase the close of precipitated phase
Degree, therefore can form highdensity precipitated phase, lift alloy strength, and reduce raw material when less Gd and Y element is added
Cost.Zn and Gd and Y collective effect can form a large amount of long-range order stacking provisions, can hinder the basal slip of dislocation, reinforcing
Matrix, further increases alloy strength.In addition, add Zr as grain refiner can notable crystal grain thinning, carry heavy alloyed
Yield strength.The performance of high-strength cast magnesium alloy containing europium disclosed by the invention is good, and in room in the case that Gd and Y addition is not high
Gentle high temperature obtains high intensity, is possibly realized the alloy extensive application in the automotive industry.
Description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below：
Fig. 1 represents the metal die schematic diagram that alloy casting is adopted；
Fig. 2 represents the metallograph of alloy described in embodiment 1；
Fig. 3 represents the metallograph of alloy described in embodiment 2；
Fig. 4 represents the metallograph of alloy described in embodiment 3；
Fig. 5 represents the metallograph of alloy described in embodiment 4.
Specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.Unreceipted concrete bar in embodiment
The experimental technique of part, generally according to normal condition or according to the condition proposed by manufacturer.
Alloy preparation method is as follows：Industrial-purity zinc is added after pure magnesium is heated to being completely melt, when melt temperature reaches
To after 720 DEG C, Mg-Gd, Mg-Y and Mg-Eu intermediate alloy is added, melt temperature gos up to 780 DEG C again after intermediate alloy fusing
Mg-Zr intermediate alloy is added, stirring 2min makes which fully melt, then 780 DEG C are warming up to, after insulation 20min, 750 DEG C is cooled to,
Refine 6min, stands 20min after refine, treats that metal liquid temp is cooled to 740 DEG C and skims surface scum and is cast.Fig. 1 represents
The metal die schematic diagram that alloy casting is adopted.
Each embodiment and GWK103 alloying component are as shown in the table, and component content is represented with percentage by weight.
Note：In table "～" represent without.
The room temperature tensile intensity of GWK103 alloy is 370MPa, and it is 4.0% that yield strength is 241MPa, elongation percentage；250
DEG C, yield strength 206MPa, elongation percentage 12.4%；At 300 DEG C, under the conditions of yield strength 163MPa, elongation percentage 28%.
The metallograph of alloy described in embodiment 1 is as shown in Fig. 2 the Alloy At Room Temperature tensile strength is 384MPa, yield strength
For 265MPa, elongation percentage is 5.6%；At 250 DEG C, yield strength 237MPa, elongation percentage 10.3%；At 300 DEG C, yield strength
Under the conditions of 172MPa, elongation percentage 23%.
The metallograph of alloy described in embodiment 2 is as shown in figure 3, the Alloy At Room Temperature tensile strength is 368MPa, yield strength
For 244MPa, elongation percentage is 6.9%；At 250 DEG C, yield strength 214MPa, elongation percentage 13.5%；At 300 DEG C, yield strength
Under the conditions of 146MPa, elongation percentage 31%.
The metallograph of alloy described in embodiment 3 is as shown in figure 4, the Alloy At Room Temperature tensile strength is 392MPa, yield strength
For 252MPa, elongation percentage is 5.3%；At 250 DEG C, yield strength 229MPa, elongation percentage 9.8%；At 300 DEG C, yield strength
Under the conditions of 170MPa, elongation percentage 20%.
The metallograph of alloy described in embodiment 4 is as shown in figure 5, the room temperature tensile intensity of the alloy is 361MPa, and surrender is strong
Spend for 263MPa, elongation percentage be；At 250 DEG C, yield strength 231MPa, elongation percentage 8.3%；At 300 DEG C, yield strength
Under the conditions of 159MPa, elongation percentage 18%.
Alloy prepared by the present invention is kept compared with GWK103 alloy while the total addition level of Gd and Y is substantially reduced
The room temperature of alloy and high temperature tensile properties.This is because the addition of Eu can significantly refine this precipitated phase, increase precipitated phase
Density, therefore can form highdensity precipitated phase, lift alloy strength when less Gd and Y element is added.Zn and Gd and Y are common
Effect can form a large amount of long-range order stacking provisions, can hinder the basal slip of dislocation, strengthen matrix, further increase conjunction
Golden intensity.
Finally illustrate, preferred embodiment above is only unrestricted in order to technical scheme to be described, although logical
Cross above preferred embodiment to be described in detail the present invention, it is to be understood by those skilled in the art that can be
Various changes are made in form and to which in details, without departing from claims of the present invention limited range.
Claims (8)
1. high-strength cast magnesium alloy containing europium, it is characterised in that each component is by weight percentage：Zn 1.0～6.0%, Gd 1.0
～6.0%, Y 1.0～3.0%, Eu 0.1～1.0%, Zr 0.1～1.0%, remaining is magnesium and impurity, impurity summation≤
0.15%.
2. high-strength cast magnesium alloy containing europium according to claim 1, it is characterised in that each component is by weight percentage：Zn
5.3%, Gd 5.4%, Y 2.7%, Eu 0.2%, Zr 0.41%, other impurity element summation≤0.15%, remaining is magnesium.
3. high-strength cast magnesium alloy containing europium according to claim 1, it is characterised in that each component is by weight percentage：Zn
2.2%, Gd 1.7%, Y 2.4%, Eu 0.4%, Zr 0.43%, other impurity element summation≤0.15%, balance of Mg.
4. high-strength cast magnesium alloy containing europium according to claim 1, it is characterised in that each component is by weight percentage：Zn
4.3%, Gd 3.5%, Y 1.8%, Eu 0.4%, Zr 0.32%, other impurity element summation≤0.15%, balance of Mg.
5. high-strength cast magnesium alloy containing europium according to claim 1, it is characterised in that each component is by weight percentage：Zn
3.1%, Gd 4.9%, Y 0.7%, Eu 0.7%, Zr 0.35%, other impurity element summation≤0.15%, balance of Mg.
6. high-strength cast magnesium alloy containing europium according to claim 1, it is characterised in that impurity element includes Fe, Cu, Ni.
7. high-strength cast magnesium alloy containing europium according to claim 6, it is characterised in that by weight percentage, Fe<
0.005%, Cu<0.015%, Ni<0.002%.
8. the preparation method described in any one of claim 1～7 containing europium high-strength cast magnesium alloy, it is characterised in that concrete steps
For：After pure magnesium is heated to being completely melt, technical pure Zn being added at 700 DEG C, after melt temperature reaches 720 DEG C, adds
Mg-Gd, Mg-Y and Mg-Eu intermediate alloy, after intermediate alloy fusing, melt temperature gos up to 780 DEG C to add in the middle of Mg-Zr
Alloy, stirring 2min makes which fully melt, then is warming up to 780 DEG C, is cooled to 750 DEG C after insulation 20min, refine 6min, refine
Stand 20min afterwards, treat that metal liquid temp is cooled to 740 DEG C and skims surface scum and cast.
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| CN201610905098.4A CN106435315B (en) | 2016-10-17 | 2016-10-17 | High-strength cast magnesium alloy containing europium and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610905098.4A CN106435315B (en) | 2016-10-17 | 2016-10-17 | High-strength cast magnesium alloy containing europium and preparation method thereof |
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| CN106435315A true CN106435315A (en) | 2017-02-22 |
| CN106435315B CN106435315B (en) | 2018-03-16 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464913A (en) * | 2001-08-13 | 2003-12-31 | 本田技研工业株式会社 | Magnesium alloy |
| CN102057068A (en) * | 2008-06-06 | 2011-05-11 | 斯恩蒂斯有限公司 | Resorbable magnesium alloy |
| CN102392166A (en) * | 2011-10-27 | 2012-03-28 | 哈尔滨工业大学 | Mg-Gd-Y-Zn-Zr-series alloy large ingot and preparation method thereof |
| CN103889474A (en) * | 2011-08-15 | 2014-06-25 | Meko激光材料加工公司 | Magnesium alloy and resorbable stents containing the same |
-
2016
- 2016-10-17 CN CN201610905098.4A patent/CN106435315B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464913A (en) * | 2001-08-13 | 2003-12-31 | 本田技研工业株式会社 | Magnesium alloy |
| CN102057068A (en) * | 2008-06-06 | 2011-05-11 | 斯恩蒂斯有限公司 | Resorbable magnesium alloy |
| CN103889474A (en) * | 2011-08-15 | 2014-06-25 | Meko激光材料加工公司 | Magnesium alloy and resorbable stents containing the same |
| CN102392166A (en) * | 2011-10-27 | 2012-03-28 | 哈尔滨工业大学 | Mg-Gd-Y-Zn-Zr-series alloy large ingot and preparation method thereof |
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Granted publication date: 20180316 Termination date: 20191017 |