CN106011572B - A kind of high roll forming ability magnesium-rare earth alloy and preparation method thereof - Google Patents
A kind of high roll forming ability magnesium-rare earth alloy and preparation method thereof Download PDFInfo
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- CN106011572B CN106011572B CN201610340013.2A CN201610340013A CN106011572B CN 106011572 B CN106011572 B CN 106011572B CN 201610340013 A CN201610340013 A CN 201610340013A CN 106011572 B CN106011572 B CN 106011572B
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- 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
- C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
Abstract
The present invention provides a kind of high roll forming ability magnesium-rare earth alloy and preparation method thereof.Each element weight/mass percentage composition is respectively Gd in the magnesium-rare earth alloy：4.8 5.2%, Y：2.3 2.8%, Zn：1.9 2.3%, Al：0.8 1.2%, inevitable Fe, Cu, Ni, Si total impurities are less than 0.03%, and surplus is Mg.Preparation method is：Using pure Mg, pure Zn, pure Al, Mg Gd intermediate alloys, Mg Y intermediate alloys as raw material, it is stirred, refine, skims after melting sources, insulation cools after standing, moulding by casting obtains magnesium alloy strand or magnesium alloy ingot, magnesium alloy strand or magnesium alloy ingot are after homogeneity is handled, and hot rolling shaping obtains magnesium-rare earth alloy on milling train.The present invention provides a kind of novel low-cost, high roll forming ability magnesium-rare earth alloy, with good comprehensive mechanical performance, can be used as high-strength structure materials'use.
Description
Technical field
The invention belongs to new material technology field, a kind of magnesium base alloy and preparation method thereof is referred to, and in particular to one
Plant high roll forming ability magnesium-rare earth and preparation method thereof.
Background technology
Rare earth element is due to unique configuration of extra-nuclear electron, playing the role of uniqueness in metallurgical, Material Field, having
Purify alloy solution, improve the functions such as alloy structure, raising Alloy At Room Temperature and mechanical behavior under high temperature, enhancing alloy corrosion resistance energy.
Therefore, magnesium-rare earth has the intrinsic advantages of magnesium alloy, and such as density is small, specific strength is high, with metallic luster, while again
With the new feature that high-temperature capability is high, croop property is excellent.
Due to the humidification of rare-earth phase, magnesium-rare earth shows excellent mechanical property under room temperature and high temperature
And enjoy favor.However, just because of the high-strength performance of magnesium-rare earth, making its deformability very poor on the contrary, majority is only capable of leading to
The method for crossing extruding carries out deformation processing.In general, having three kinds of ternarys balance phase, i.e. W phases in Mg-Zn-RE alloy systems
(Mg3Zn3RE2, cubic structure), I phases (Mg3Zn6RE, icosahedral quasicrystal structure) and X phases (Mg12ZnRE, long period stacking
Structure) [Materials＆Design 87 (2015) 245-255, Journal of Alloys and Compounds 426
(2006)155-161].In these three phases, two kinds with X of I is considered as mutually effective strengthens mutually and by more concern
[Materials Science and Engineering:A 373(2004)320-327,Scripta Materialia 53
(2005)799-803].However, due to adhesion [Materials Science and weaker between matrix
Engineering:A 373 (2004) 320-327] and fracture tendency [Journal of Alloys and in drawing process
Compounds 432 (2007) 129-134], it is generally recognized that W phases are a kind of destruction phase rather than beneficial phase.In Mg-Zn-RE alloys
The formation of tri- kinds of phases of W, I and X depends on Zn (wt.%)/RE (wt.%) ratio：When Zn (wt.%)/RE (wt.%) is more than 4.38
When, only I phases are generated；When Zn (wt.%)/RE (wt.%) is located between 1.10 and 4.38, while generating I phases and W phases；When
Zn (wt.%)/RE (wt.%) only has W phases to generate when being less than 1.10；And then can when Zn (wt.%)/RE (wt.%) is fairly small
There are X phases [(2006) 155-161 of Journal of Alloys and Compounds 426].These intermetallic compounds sink
Form sediment and suppress Grain Boundary Sliding in grain boundaries, so as to improve the room temperature of alloy, mechanical behavior under high temperature.But the mode of this reinforced alloys
Low-alloyed elongation percentage will certainly be dropped, rolling for the heat processing and forming performance of alloy, the particularly magnesium-rare earth of the phase containing W is influenceed
Crystallized ability processed.
Mg-Gd-Y systems magnesium alloy has excellent mechanical property, but is due to that its cost is higher, is unfavorable for commonly used.
So, on the premise of certain mechanical property is ensured, the content of alloy rare earth elements is reduced, developing some novel alloys turns into
One of direction that Mg-RE systems alloy is given priority to.
The content of the invention
The purpose of the present invention is that there is provided a kind of high roll forming ability while magnesium-rare earth material cost is reduced
Magnesium-rare earth and preparation method thereof.
The technical scheme is that：
A kind of high roll forming ability magnesium-rare earth, the high roll forming ability magnesium-rare earth with the pure Mg of business,
Commercially pure Zn, pure Al, Mg-Gd intermediate alloy of business, Mg-Y intermediate alloys are to be stirred after raw material, melting sources, refine, take off
Slag, insulation cools after standing, and moulding by casting is obtained with high roll forming ability magnesium-rare earth；Described magnesium-rare earth
Middle each element weight/mass percentage composition is respectively Gd：4.8-5.2%, Y：2.3-2.8%, Zn：1.9-2.3%, Al：0.8-1.2%,
Inevitable Fe, Cu, Ni, Si total impurities are less than 0.03%, and surplus is Mg.
The preparation method of above-mentioned high roll forming ability magnesium-rare earth, specifically includes following steps：
Using the pure Mg of business, the pure Zn of business, pure Al, Mg-Gd intermediate alloy of business, Mg-Y intermediate alloys as raw material；According to production
The weight/mass percentage composition of product is Gd：4.8-5.2%, Y：2.3-2.8%, Zn：1.9-2.3%, Al：0.8-1.2%, unavoidably
Fe, Cu, Ni, Si total impurities be less than 0.03%, surplus mixes raw material for Mg proportioning；Melted after alloying element fusing
Refine, stir, skim, insulation cools after standing, and moulding by casting obtains magnesium alloy strand or magnesium alloy ingot；Gained magnesium alloy strand
Or magnesium alloy ingot is after homogeneity is handled, hot rolling shapes on milling train, obtains high roll forming ability magnesium-rare earth and closes
Gold；
The method of described moulding by casting is metal die moulding by casting or continuous casting forming；Poured according to continuous casting forming mode
Injection forming, during continuous casting forming, Serum Magnesium uses SF in crystallizer6/CO2Gas shield.Used in described fusion process
One of the following two kinds mode is protected：One kind is SF6/CO2Gas shield, one kind is flux protection；Described smelting technology ginseng
Number is：Melt holding temperature is 740-750 DEG C, and insulation time of repose is 25-45min, and pouring temperature is 700-740 DEG C.It is described
Homogeneity processing technological parameter be：Homogenization temperature is 420-550 DEG C, and soaking time is 5-15h, and the type of cooling is air cooling.
The main technologic parameters of the hot rolling are：Rolling temperature is that deflection is to be protected between 1-10%, passage between 420-550 DEG C, passage
The warm time is 5-15min, and total deformation is 50-85%.
Beneficial effects of the present invention are：
(1) present invention adds in the elements such as Gd, Y, Zn, Al, alloy preferentially form a large amount of cluster-shaped Al in the magnesium alloy11
(Y,Gd)3Particle phase and a small amount of polygon bulk Al2(Y, Gd) phase, this lessens the content of Gd, Y in alloy, then W is opposite
The trend of sheet growth is suppressed, and only develops into the less particle of size.Consequently, it is possible to W with respect to alloy in deformation process
Middle destructive power is significantly reduced.
(2) no matter W phases, or Al11(Y,Gd)3And Al2(Y, Gd) phase, is hard phase.Can be strong in the operation of rolling
It is strong to stimulate the generation of magnesium matrix dynamic recrystallization, significantly improve the rolling deformation ability of alloy.It is 60-80%'s in total deformation
In the case of, the side of sheet alloy is split to be suppressed with facial cleft.
(3) what the present invention was used is all conventional melting, shaping, the method, Gd, Y such as homogeneity processing and hot rolling processing
Total content is less than 8%, and low with production cost, production efficiency is high, the features such as operation is easy to carry out, raw beneficial to scale business
Production.
(4) magnesium-rare earth of the invention has certain mechanical strength simultaneously, high elongation, and beneficial to hot rolling
The characteristics of processing (split without obvious side, facial cleft feature), be the ideal material of magnesium alloy production and application.Magnesium-rare earth of the present invention
Every mechanical property after alloy rolling see the table below：
Mg-Gd-Y-Zn-Al mechanical property
Brief description of the drawings
Fig. 1 is the surface picture figure of Mg-Gd-Y-Zn-Al alloy rolled sheets in embodiment 1；
Fig. 2 is Mg-Gd-Y-Zn-Al alloy casting state microstructure picture figures in embodiment 1；
Fig. 3 is Mg-Gd-Y-Zn-Al alloys rolling state microstructure picture figure in embodiment 1.
Embodiment
Technical scheme is described in detail below by way of specific embodiment.
Embodiment 1
The chemical composition (mass percent) of alloy is：5.1%Gd, 2.6%Y, 2.1%Zn, 1.0Al, Impurity Fe,
Cu, Ni, Si total amount are less than 0.03%, and surplus is Mg.
The founding and rolling mill practice for preparing alloy be：First by proportioning weighing, by Mg, Zn, Al, Mg-Gd intermediate alloy,
Mg-Y intermediate alloys are preheating to 200 DEG C, are then put into Mg and are preheating in 100 DEG C of crucible, and are passed through SF6:CO2Volume ratio is
1:100 protective gas, Zn is added after Mg is completely melt, added when melt temperature reaches 740 DEG C Mg-Y intermediate alloys,
Mg-Gd intermediate alloys, after the intermediate alloy fusing of addition, are passed through argon gas refining stirring 10min, in 740 DEG C of standings after slagging-off
25min, after temperature is down to 700 DEG C, slab ingot is cast into using metal die.Gained slab ingot is after 450 DEG C of homogeneity processing 10h
Air cooling, is rolled after turning at 420 DEG C, deflection 3% between passage, and soaking time is 15min between passage, rolls total deformation
For 70%, finally obtain it is boundless split, the magnesium-rare earth sheet material of facial cleft.
Embodiment 2
The chemical composition (mass percent) of alloy is：5.0%Gd, 2.8%Y, 2.0%Zn, 0.9Al, Impurity Fe,
Cu, Ni, Si total amount are less than 0.03%, and surplus is Mg.
The founding and rolling mill practice for preparing alloy be：First by proportioning weighing, by Mg, Zn, Al, Mg-Gd intermediate alloy,
Mg-Y intermediate alloys are preheating to 200 DEG C, and then Mg is put into containing in the melting furnace for having melted flux, added after Mg is completely melt
Enter Zn, Al, Mg-Gd intermediate alloys, Mg-Y intermediate alloys are added when melt temperature reaches 750 DEG C, the intermediate alloy of addition melts
After change, argon gas refining stirring 15min is passed through, 30min is stood at 740 DEG C after slagging-off, after temperature is down to 720 DEG C, using electromagnetism
Continuous metal cast process obtains cylindrical blank.Continuous casting electromagnetic technological parameter is：Power is 10kW, supply frequency 2000Hz, stable throwing
Speed is that 8cm/min, cooling water inflow are 1.5m3SF is passed through in/h, crystallizer6:CO2Volume ratio is 1:100 protective gas.Institute
Obtain continuous casting billet homogeneity at 500 DEG C and handle air cooling after 8h, be machined the slab for 40mm, rolled at 450 DEG C, passage
Between deflection 5%, soaking time is 10min between passage, and rolling total deformation is 80%, finally obtain it is boundless split, the magnesium of facial cleft-
Rare-earth alloy slab.
Embodiment 3
The chemical composition (mass percent) of alloy is：5.0%Gd, 2.7%Y, 2.0%Zn, 1.0Al, Impurity Fe,
Cu, Ni, Si total amount are less than 0.03%, and surplus is Mg.
The founding and rolling mill practice for preparing alloy be：First by proportioning weighing, by Mg, Zn, Al, Mg-Gd intermediate alloy,
Mg-Y intermediate alloys are preheating to 200 DEG C, and then Mg is put into containing in the melting furnace for having melted flux, added after Mg is completely melt
Enter Zn, Al, Mg-Gd intermediate alloys, Mg-Y intermediate alloys are added when melt temperature reaches 750 DEG C, the intermediate alloy of addition melts
After change, argon gas refining stirring 15min is passed through, 30min is stood at 740 DEG C after slagging-off, after temperature is down to 720 DEG C, using common
Continuous metal cast process obtains cylindrical blank.Casting parameters are：Stable throwing speed is that 8cm/min, cooling water inflow are 1.5m3/ h, knot
SF is passed through in brilliant device6:CO2Volume ratio is 1:100 protective gas.Gained continuous casting billet is empty after homogeneity processing 8h at 500 DEG C
It is cold, the slab for 40mm is machined, is rolled at 450 DEG C, deflection 5% between passage, soaking time is between passage
10min, rolling total deformation be 80%, finally obtain it is boundless split, the magnesium-rare earth sheet material of facial cleft.
Claims (6)
1. a kind of high roll forming ability magnesium-rare earth, it is characterized in that：The high roll forming ability magnesium-rare earth is with business
The pure Mg of industry, the pure Zn of business, pure Al, Mg-Gd intermediate alloy of business, Mg-Y intermediate alloys be stirred after raw material, melting sources,
Refine, skim, insulation cools after standing, and moulding by casting is obtained with high roll forming ability magnesium-rare earth；Described magnesium-
Each element weight/mass percentage composition is respectively Gd in rare earth alloy：4.8-5.2%, Y：2.3-2.8%, Zn：1.9-2.3%, Al：
0.8-1.2%, inevitable Fe, Cu, Ni, Si total impurities are less than 0.03%, and surplus is Mg.
2. a kind of preparation method of high roll forming ability magnesium-rare earth described in claim 1, it is characterized in that：
Using the pure Mg of business, the pure Zn of business, pure Al, Mg-Gd intermediate alloy of business, Mg-Y intermediate alloys as raw material；According to product
Weight/mass percentage composition is Gd：4.8-5.2%, Y：2.3-2.8%, Zn：1.9-2.3%, Al：0.8-1.2%, inevitably
Fe, Cu, Ni, Si total impurities are less than 0.03%, and surplus mixes raw material for Mg proportioning；Be stirred after melting sources, essence
Refine, skim, insulation cools after standing, and moulding by casting obtains magnesium alloy strand or magnesium alloy ingot；Gained magnesium alloy strand or magnesium
Alloy cast ingot is after homogeneity is handled, and hot rolling shapes on milling train, obtains high roll forming ability magnesium-rare earth；
The technological parameter of the melting is：Melt holding temperature is 740-750 DEG C, and insulation time of repose is 25-45min, cast
Temperature is 700-740 DEG C；
The technological parameter of homogeneity processing is：Homogenization temperature is 420-550 DEG C, and soaking time is 5-15h, the type of cooling
For air cooling；
The main technologic parameters of the hot rolling are：Rolling temperature is that deflection is 1-10%, passage between 420-550 DEG C, passage
Between soaking time be 5-15min, total deformation is 50-85%.
3. the preparation method of high roll forming ability magnesium-rare earth according to claim 2, it is characterized in that：Described
SF is used in fusion process6/CO2Gas shield uses flux protection.
4. the preparation method according to Claims 2 or 3, it is characterised in that the method for described moulding by casting is metal pattern
Have moulding by casting or continuous casting forming.
5. the preparation method of the high roll forming ability magnesium-rare earth according to Claims 2 or 3, it is characterized in that：It is described
Moulding by casting use continuous casting forming mode when, during continuous casting forming, Serum Magnesium uses SF in crystallizer6/CO2Gas is protected
Shield.
6. the preparation method of high roll forming ability magnesium-rare earth according to claim 4, it is characterized in that：Described
When moulding by casting uses continuous casting forming mode, during continuous casting forming, Serum Magnesium uses SF in crystallizer6/CO2Gas shield.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109881064B (en) * | 2019-03-29 | 2021-09-24 | 上海交通大学 | High-strength high-toughness heat-resistant die-casting Mg-Gd-Y alloy and preparation method thereof |
| CN109930044B (en) * | 2019-03-29 | 2021-07-09 | 江苏中翼汽车新材料科技有限公司 | High-strength-toughness heat-resistant Mg-Gd-Y alloy suitable for gravity casting and preparation method thereof |
| CN109930045B (en) * | 2019-03-29 | 2021-07-09 | 南京航空航天大学 | High-strength-toughness heat-resistant Mg-Gd alloy suitable for gravity casting and preparation method thereof |
| CN109972009B (en) * | 2019-04-17 | 2021-06-04 | 上海交通大学 | High-toughness high-modulus wrought magnesium alloy and preparation method thereof |
| CN111041311A (en) * | 2019-12-31 | 2020-04-21 | 北京工业大学 | Rare earth magnesium alloy with low cost and high performance and preparation technology thereof |
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|---|---|---|---|---|
| CN101215661A (en) * | 2008-01-07 | 2008-07-09 | 吉林大学 | Tough easy-deforming magnesium alloy |
| CN101760683A (en) * | 2008-12-24 | 2010-06-30 | 沈阳铸造研究所 | High-strength casting magnesium alloy and melting method thereof |
| CN104651693A (en) * | 2013-11-22 | 2015-05-27 | 北京有色金属研究总院 | Microscale Al-containing rare earth wrought magnesium alloy and preparation method thereof |
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2016
- 2016-05-18 CN CN201610340013.2A patent/CN106011572B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215661A (en) * | 2008-01-07 | 2008-07-09 | 吉林大学 | Tough easy-deforming magnesium alloy |
| CN101760683A (en) * | 2008-12-24 | 2010-06-30 | 沈阳铸造研究所 | High-strength casting magnesium alloy and melting method thereof |
| CN104651693A (en) * | 2013-11-22 | 2015-05-27 | 北京有色金属研究总院 | Microscale Al-containing rare earth wrought magnesium alloy and preparation method thereof |
Non-Patent Citations (2)
| Title |
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| Mg-6Gd-3Y-2Zn-0.5Zr镁合金的组织和性能;房灿峰等;《特种铸造及有色合金》;20121231;第710-713页 * |
| 铸造Mg-Gd-Y-Al镁合金的拉伸与阻尼性能;高菲等;《特种铸造及有色合金》;20141231;第440-444页 * |
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