CN109881060A - A kind of corrosion-resistant magnesium alloy and preparation method thereof containing Si - Google Patents
A kind of corrosion-resistant magnesium alloy and preparation method thereof containing Si Download PDFInfo
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Abstract
The invention belongs to the technical fields of magnesium alloy, disclose a kind of corrosion-resistant magnesium alloy and preparation method thereof containing Si.The corrosion-resistant magnesium alloy containing Si includes following components by weight percentage: Sn 6~10%；Si 0.7~1%；RE 0.3~1%；Mg: surplus；The RE is Nd and/or Y.Invention additionally discloses the preparation methods of corrosion-resistant magnesium alloy.Corrosion-resistant magnesium alloy of the invention is using Nd, the rotten eutectic Mg of Y element2Si phase improves eutectic Mg2Si phase morphology makes coarse Chinese character shape Mg2Si becomes dotted or rodlike, and Tissue distribution is uniform, and significant the corrosion resisting property for improving the magnesium alloy containing Si.The intermediate alloy that the present invention uses is low in cost, and processing technology is simple, it is easy to accomplish industrialized mass production.
Description
Technical field
The invention belongs to the technical fields of magnesium alloy, and in particular to a kind of corrosion-resistant magnesium alloy and preparation method thereof containing Si.
Background technique
Magnesium alloy have low-density, high specific strength and specific stiffness, it is high than elasticity modulus, thermal conductivity is good, machining property
Many advantages, such as excellent, has broad prospect of application in fields such as aerospace, automobile, electronics and defense military industry, is praised
For 21 century " environmentally protective and ecological metal material ".Therefore, magnesium alloy has become the ideal lightweight of substitution steel, aluminium alloy
Material.However compared with steel and aluminium alloy, the absolute intensity low and high temperature performance of magnesium alloy is poor, especially because the electricity of Mg element
Electrode potential is low, so that the corrosion resistance of magnesium alloy is generally poor, application is very limited, and develops the magnesium alloy pair of high corrosion-resistant
In expansion magnesium alloy using extremely important.The patent application of Publication No. CN106282706A discloses a kind of rear earth corrosion resistant magnesium
Alloy.The corrosion resistance magnesium alloy ingredient of the patent application publication is simple, excellent corrosion-proof performance, but is added to larger amount of noble metal
Element (Ag) and rare earth element (Nd, Y), higher cost are unfavorable for actual production.
Alloyage process, which has become, improves magnesium alloy high-temperature behavior, mechanics, the performances such as anti-corrosion most commonly and effectively hand
Section.Sn element has many advantages, such as that price is low, be easy to alloying and processing technology is easy.Sn solid solubility in Mg vary with temperature compared with
It greatly, is a kind of typical alloy element with precipitation strength effect.In addition, Sn produces high-melting-point Mg in Mg2Sn phase, should
On phase Dispersed precipitate and crystal boundary, it effectively can hinder dislocation movement by slip by pinning crystal boundary, be conducive to the room temperature and high temperature that improve magnesium alloy
Performance.Similar with Sn element, Si element has the advantages that low cost and physical property are good, and Si solubility in Mg is extremely low, generates
The second phase Mg2Si has the characteristics that low-density, high-melting-point and high elastic modulus, is to improve magnesium alloy high-temperature behavior, especially
Effective reinforced phase of high-temperature creep resistance.Therefore, Mg-Sn-Si system magnesium alloy is the heat resistant magnesium received significant attention in recent years
Alloy.However magnesium alloy containing Si, especially under ordinary casting condition, Mg in alloy2Coarse dendrite, polygon is often presented in Si phase
Shape and Chinese character shape, seriously isolate matrix, decline magnesium alloy mechanical property and corrosion resisting property, seriously affect its application.Therefore, it controls
System and improvement Mg2Form, size and the distribution of Si phase are the key that improve corrosion stability of magnesium alloy containing Si.Pass through addition alloying member
Element improves microstructure to improve the corrosion resistance of magnesium alloy, can effectively expand the application range of magnesium alloy.
Summary of the invention
In order to overcome the disadvantages and deficiencies of the prior art, it is an object of that present invention to provide a kind of with the low of excellent corrosion resistance
Cost magnesium alloy containing Si and preparation method thereof.
The purpose of the present invention is achieved through the following technical solutions:
A kind of corrosion-resistant magnesium alloy containing Si, including following components by weight percentage:
The RE is Nd and/or Y.
When RE is Nd and Y, the weight content of Nd is greater than the weight content of Y, the weight content >=1.5 times Y's of preferably Nd
Weight content, the weight content of the weight content >=2 times Y of more preferable Nd.
Preferably, when RE is Nd and Y, the weight of weight≤Nd weight≤10 times Y of 1.5 times of Y.
The preparation method of the corrosion-resistant magnesium alloy containing Si, comprising the following steps:
(1) it melts pure magnesium: in protective atmosphere, magnesium ingot being melted, obtains pure Serum Magnesium；
(2) alloying: magnesium-silicon intermediate alloy, pure Sn and magnesium-RE intermediate alloy being added into melt obtained by step (1), melt
Change, stirring stands heat preservation, obtains magnesium alloy fused mass；RE is Nd or Y in magnesium-RE intermediate alloy；Magnesium-RE intermediate alloy is magnesium-Nd
Intermediate alloy and/or magnesium-Y intermediate alloy；
(3) cast alloys: carrying out the magnesium alloy fused mass of step (2) to pull out slag, and casting obtains corrosion-resistant magnesium alloy containing Si.
Step (2) the specific steps are magnesium-silicon intermediate alloy and pure Sn are added into pure Serum Magnesium obtained by step (1), melt
Change and mix, magnesium-RE intermediate alloy is then added and carries out Metamorphism treatment, is stirred after fusing, stands heat preservation, obtains magnesium alloy fused mass.
The mixing stirs 1~2min after referring to sufficiently fusing；The temperature melted in the fusing mixing is 730~770
℃；
The temperature of the Metamorphism treatment is 730~770 DEG C；The time stirred after the fusing is 1~2min, the standing
The time of heat preservation is 8~12min.
For Mg-3%Si, (3% refers to Si element institute in magnesium silicon intermediate alloy to magnesium-silicon intermediate alloy described in step (2)
Account for mass percent)；Magnesium-RE intermediate alloy is Mg-20%RE intermediate alloy, i.e. closes among Mg-20%Y and/or Mg-20%Nd
Gold.
The temperature melted in step (1) is 730~770 DEG C.
Protective atmosphere described in step (1) is SF6And N2Mixed gas；Mixed volume ratio is SF6:N2=2:98.
Fusing, the temperature kept the temperature are 730~770 DEG C alone in step (2).
Casting refers in step (3) casts in the carbon steel mold after preheated；The preheating temperature of mold is 180
~210 DEG C.
Basic principle of the invention:
Sn element improves the second phase Mg after Mg-Si alloy is added2The size and distribution of Si, while being dissolved in α-Mg matrix
Sn take part in film forming procedure, the ingredient of film is magnesia and tin oxide, in addition, the Mg being evenly distributed2Sn phase can corrode
Barrier action is played in journey, reduces corrosion rate.The addition of rare earth element (Nd, Y) equally improves the anti-corrosion of Mg-Si alloy
Property.On the one hand, rare earth element affects the electrochemical corrosion course of magnesium alloy, generates Si- in the base after rare earth element is added
RE-rich phase, can be used as weak cathode reduces corrosion driving force, to inhibit the generation of galvanic corrosion.On the other hand, through dilute
In Mg-Si alloy after earth elements are rotten, eutectic Mg2Si phase becomes more uniform tiny dotted or rodlike from coarse Chinese character shape.
In corrosion process, with the dissolution of α-Mg matrix, the second phase builds up and forms continuous phase in matrix surface, at the same time
Corrosion product gradually accumulates, and forms corrosion products film, and the two can be effective as physical barriers and hinder corrosive ions (such as: Cl-)
Penetrate further into, inhibit corrosion further occurrence.Therefore, after Sn and RE element being added, the corrosion resistance of Mg-Si alloy is significant
It improves.
Compared with prior art, the present invention has the following advantages and beneficial effects:
(1) corrosion-resistant magnesium alloy of the invention is using Nd, the rotten eutectic Mg of Y element2Si phase improves eutectic Mg2Si phase morphology,
Make coarse Chinese character shape Mg2Si becomes dotted or rodlike, and Tissue distribution is uniform；
(2) present invention improves the corrosion resisting property of the magnesium alloy containing Si by alloyage process significantly；
(3) intermediate alloy that the present invention uses is low in cost, and processing technology is simple, it is easy to accomplish industrialized mass production.
Detailed description of the invention
Fig. 1 is optical microstructure's figure of Mg-0.8%Si alloy in comparative example 1；
Fig. 2 is the macrocorrosion shape appearance figure of Mg-0.8%Si alloy in comparative example 1；
Fig. 3 is the microcosmic erosion profile figure of Mg-0.8%Si alloy in comparative example 1；
Fig. 4 is optical microstructure's figure of Mg-8%Sn-0.7%Si-1.0%Y alloy in embodiment 1；
Fig. 5 is the macrocorrosion shape appearance figure of Mg-8%Sn-0.7%Si-1.0%Y alloy in embodiment 1；
Fig. 6 is the microcosmic erosion profile figure of Mg-8%Sn-0.7%Si-1.0%Y alloy in embodiment 1.
Specific embodiment
For a better understanding of the invention, the present invention is further described below with reference to embodiment and attached drawing, but this hair
Bright embodiment is without being limited thereto.
Comparative example 1:Mg-0.8%Si alloy
Raw material used in this comparative example includes high purity magnesium, Mg-3%Si intermediate alloy.The element weight percent of the alloy
Are as follows: Si:0.8%, remaining is Mg.
The preparation of Mg-0.8%Si alloy:
(1) it melting high purity magnesium: high-purity magnesium ingot (purity 99.95%) is heated to molten state, fusion temperature is 750 DEG C,
Obtain pure Serum Magnesium；
(2) alloying: Mg-3%Si intermediate alloy is added into melt obtained by step (1), stirs until completely melted
1min keeps ingredient uniform；Heat preservation 10min is stood after stirring；
(3) it cast alloys: to through step (2), treated that magnesium alloy fused mass carries out pulling out slag, is then molded into pre- through 200 DEG C
In carbon steel mold after heat, Mg-0.8%Si alloy is obtained.Whole process carried out under protective atmosphere (protection gas be SF6
And N2Mixed gas, the two volume ratio are 2%:98%).High-purity magnesium ingot, Mg-3%Si intermediate alloy dosage according to Mg-
The weight percent of element calculates in 0.8%Si alloy.
In order to characterize the tissue and performance characteristics of above-mentioned alloy, closed using optical microscopy (model: Leica DFC)
Golden as-cast structure observation；The macrocorrosion morphology observations of sample are carried out using digital camera；Utilize scanning electron microscope (type
Number: Merlin) carry out the microcosmic erosion profile observation of sample；Using electrochemical workstation (model: SP-150) to polishing after
Sample carries out dynamic potential polarization curve test, and scanning range is ± 0.3V, the sweep speed 1mV/s of open circuit potential, test temperature
Degree is 25 DEG C, carries out data analysis using EC-Lab software.In addition, carry out etch according to GB10124-1988 standard soaks examination entirely
It tests, wherein specimen size is Φ 30 × 5 (± 1) mm, and etching condition is 3.5%NaCl solution, and soaking time is for 24 hours.Test knot
Fruit is shown in Table 1.
Fig. 1 is Mg-0.8%Si alloy casting state optical microstructure figure in comparative example 1.As shown in Figure 1, Mg-0.8%Si is closed
Payment organization is mainly by α-Mg phase, nascent Mg2Si phase and α-Mg+Mg2Si phase eutectic structure is constituted.Wherein eutectic Mg2Si phase is in coarse
Chinese character shape, come into being Mg2Si phase is surrounded by α-Mg haloing, and α-Mg haloing is surrounded by biphase eutectic crystal tissue.Fig. 2 is comparative example 1
Middle Mg-0.8%Si alloy macrocorrosion shape appearance figure, it can be seen that for sample by severe pitting, matrix surface generates a large amount of corrosion
Hole, alloy integrality are destroyed.Fig. 3 is the microcosmic erosion profile figure of Mg-0.8%Si alloy in comparative example 1, as shown, α-Mg
Matrix is dissolved and a large amount of corrosion holes occurs in specimen surface.Through measuring, the soak test weight loss rate of the alloy is 6.68mg/
cm2H, corrosion current density are 145.1 μ Acm-2, the corrosion resistance of the alloy is very poor.
Embodiment 1:Mg-8%Sn-0.7%Si-1.0%Y alloy
Raw material used in the present embodiment includes closing among high purity magnesium, Mg-3%Si intermediate alloy, high-purity Sn and Mg-20%Y
Gold.The element weight percent of the alloy are as follows: Si:0.7%, Sn:8%, Y:1.0%, remaining is Mg.High purity magnesium, Mg-3%Si
The use of intermediate alloy, high-purity Sn and Mg-20%Y intermediate alloy (20% refers to Y mass percent shared in intermediate alloy)
Amount is calculated according to the element weight percent of alloy.
The preparation of Mg-8%Sn-0.7%Si-1.0%Y alloy:
(1) it melts high purity magnesium: high-purity magnesium ingot is heated to molten state, fusion temperature is 770 DEG C, obtains pure Serum Magnesium；
(2) Mg-3%Si intermediate alloy, high-purity Sn and Mg-20% alloying: are sequentially added into melt obtained by step (1)
Y intermediate alloy, stirring 1min until completely melted keeps ingredient uniform；Heat preservation 8min is stood after stirring；
(3) it cast alloys: to through step (2), treated that magnesium alloy fused mass carries out pulling out slag, is then molded into pre- through 180 DEG C
In carbon steel mold after heat, natural cooling obtains Mg-8%Sn-0.7%Si-1.0%Y alloy.Whole process is being protected
(protection gas is SF for progress under atmosphere6And N2Mixed gas, the two volume ratio are 2%:98%).
In order to characterize the tissue and performance characteristics of the present embodiment, structure observation, erosion profile observation, electricity have been carried out to alloy
Chemical curved measurement and etch total immersion test.Test and test method and comparative example 1 are consistent.Test result is shown in Table 1.
Fig. 4 is the as cast condition optical microstructure figure of Mg-8%Sn-0.7%Si-1.0%Y alloy in embodiment 1.Such as Fig. 4 institute
Show, goes out black cenotype Mg along cyrystal boundary segregation2Sn, the surrounding black area area Wei Fu Sn.Compared with comparative example 1, Mg in the alloy2Si
It is mutually refined, becomes dotted or rodlike from coarse Chinese character shape and distribution is more uniform.Fig. 5 is Mg-8%Sn- in embodiment 1
0.7%Si-1.0%Y alloy macrocorrosion shape appearance figure, it can be seen that after Sn element is added, corrosion sample is in pewter, after corrosion
Sample integrality is preferable, and matrix surface is in local corrosion, and corrosion area is small and depth is shallower.Fig. 6 is Mg-8% in embodiment 1
The microcosmic erosion profile figure of Sn-0.7%Si-1.0%Y alloy, as shown, matrix is by slight erosion, erosion profile presentation layer
Sheet or filiform.The soak test weight loss rate of the alloy is 0.43mg/cm2H, corrosion current density are 33.8 μ A
cm-2.Corrosion rate has dropped more than an order of magnitude, only about in comparative example alloy corrosion rate 1/15, i.e. corrosion resistance
Improve 15 times.Corrosion current density has dropped 76.7%.Alloyage process of the invention is aobvious to alloy structure modification effect
It writes, and improve the corrosion resistance of the magnesium alloy containing Si with can dramatically.
Embodiment 2:Mg-8%Sn-0.7%Si-1.0%Nd
Raw material used in the present embodiment includes closing among high purity magnesium, Mg-3%Si intermediate alloy, high-purity Sn and Mg-20%Nd
Gold.The element weight percent of the alloy are as follows: Si:0.7%, Sn:8%, Nd:1.0%, remaining is Mg.
The preparation of Mg-8%Sn-0.7%Si-1.0%Nd:
(1) it melts high purity magnesium: high-purity magnesium ingot is heated to molten state, fusion temperature is 770 DEG C, obtains pure Serum Magnesium；
(2) Mg-3%Si intermediate alloy, high-purity Sn and Mg-20% alloying: are sequentially added into melt obtained by step (1)
Nd intermediate alloy, manually stirring 1min keeps ingredient uniform until completely melted；Heat preservation 8min is stood after stirring；
(3) it cast alloys: to through step (2), treated that magnesium alloy fused mass carries out pulling out slag, is then molded into pre- through 180 DEG C
In carbon steel mold after heat, natural cooling obtains Mg-8%Sn-0.7%Si-1.0%Nd.Whole process is in protective atmosphere
(protection gas is SF for lower progress6And N2Mixed gas, the two volume ratio are 2%:98%).
In order to characterize the tissue and performance characteristics of the present embodiment, structure observation, erosion profile observation, electricity have been carried out to alloy
Chemical curved measurement and etch total immersion test.Test and test method and comparative example 1 are consistent.Test result is shown in Table 1.
The as cast condition optical microstructure of the present embodiment is similar in Fig. 4 (embodiment 1).It is inclined in grain boundaries after alloying
Black cenotype Mg is precipitated2Sn and the richness area Sn.Mg2Si phase is refined and is evenly distributed.Mg-8%Sn-0.7%Si-1.0%Nd alloy
Macro, microcosmic erosion profile it is similar with Fig. 5,6 (embodiments 1), for matrix only by slight local corrosion, erosion profile is in synusia
Shape or filiform.The soak test weight loss rate of the alloy is 0.61mg/cm2H, corrosion current density are 51.5 μ Acm-2。
Corrosion rate has dropped an order of magnitude, only about in comparative example alloy corrosion rate 1/10, i.e. corrosive nature improves 10 times.
Corrosion current density has dropped 64.5%.Alloyage process of the invention is significant to alloy structure modification effect, and can be significant
The corrosion resistance of ground raising magnesium alloy containing Si.
Embodiment 3:Mg-6%Sn-1.0%Si-0.7%Nd-0.3%Y
Raw material used in the present embodiment includes high purity magnesium, Mg-3%Si intermediate alloy, high-purity Sn, Mg-20%Nd and Mg-
20%Y intermediate alloy.The element weight percent of the alloy are as follows: Si:1.0%, Sn:6%, Nd:0.7%, Y:0.3%, remaining
For Mg.
The preparation of Mg-6%Sn-1.0%Si-0.7%Nd-0.3%Y:
(1) it melts high purity magnesium: high-purity magnesium ingot is heated to molten state, fusion temperature is 730 DEG C, obtains pure Serum Magnesium；
(2) Mg-3%Si intermediate alloy, high-purity Sn, Mg-20% alloying: are sequentially added into melt obtained by step (1)
Nd and Mg-20%Y intermediate alloy, manually stirring 2min keeps ingredient uniform until completely melted；12min is stood after stirring；
(3) it cast alloys: to through step (2), treated that magnesium alloy fused mass carries out pulling out slag, is then molded into pre- through 210 DEG C
In carbon steel mold after heat, natural cooling obtains alloy Mg-6%Sn-1.0%Si-0.7%Nd-0.3%Y.Whole process
(protection gas is SF for progress under protective atmosphere6And N2Mixed gas, the two volume ratio are 2%:98%).
In order to characterize the tissue and performance characteristics of the present embodiment, structure observation, erosion profile observation, electricity have been carried out to alloy
Chemical curved measurement and etch total immersion test.Test and test method and comparative example 1 are consistent.Test result is shown in Table 1.
The as cast condition optical microstructure of the present embodiment is similar in Fig. 4 (embodiment 1).It is new in brilliant black after alloying
Phase Mg2Sn is segregated in grain boundaries and is gone out, and the area Bei Fu Sn surrounds.Mg2Si phase thinning effect is significant, is become a little from coarse Chinese character shape
It shape or corynebacterium and is evenly distributed.Macro, the microcosmic erosion profile and figure of Mg-6%Sn-1.0%Si-0.7%Nd-0.3%Y alloy
5, similar in 6 (embodiments 1), for matrix only by slight local corrosion, erosion profile is in lamellar or filiform.The immersion of the alloy
Test weight loss rate is 0.37mg/cm2H, corrosion current density are 32.3 μ Acm-2.Corrosion rate has dropped more than one
A order of magnitude, only about in comparative example alloy corrosion rate 1/17, i.e. corrosive nature improves 17 times.Under corrosion current density
Drop 77.7%.Alloyage process of the invention is significant to alloy structure modification effect, and improves magnesium alloy containing Si with can dramatically
Corrosion resistance.
Embodiment 4:Mg-10%Sn-1.0%Si-0.3%Nd-0.7%Y
Raw material used in the present embodiment includes high purity magnesium, Mg-3%Si intermediate alloy, high-purity Sn, Mg-20%Nd and Mg-
20%Y intermediate alloy.The element weight percent of the alloy are as follows: Si:1.0%, Sn:10%, Nd:0.3%, Y:0.7%, remaining
For Mg.
The preparation of Mg-10%Sn-1.0%Si-0.3%Nd-0.7%Y:
(1) it melts high purity magnesium: high-purity magnesium ingot is heated to molten state, fusion temperature is 730 DEG C, obtains pure Serum Magnesium；
(2) Mg-3%Si intermediate alloy, high-purity Sn, Mg-20% alloying: are sequentially added into melt obtained by step (1)
Nd and Mg-20%Y intermediate alloy, manually stirring 2min keeps ingredient uniform until completely melted；Heat preservation 12min is stood after stirring；
(3) it cast alloys: to through step (2), treated that magnesium alloy fused mass carries out pulling out slag, is then molded into pre- through 210 DEG C
In carbon steel mold after heat, natural cooling obtains alloy Mg-10%Sn-1.0%Si-0.3%Nd-0.7%Y.Whole process
(protection gas is SF for progress under protective atmosphere6And N2Mixed gas, the two volume ratio are 2%:98%).
In order to characterize the tissue and performance characteristics of the present embodiment, structure observation, erosion profile observation, electricity have been carried out to alloy
Chemical curved measurement and etch total immersion test.Test and test method and comparative example 1 are consistent.Test result is shown in Table 1.
The as cast condition optical microstructure of the present embodiment is similar in Fig. 4 (embodiment 1).After alloying, black cenotype
Mg2Sn is segregated in grain boundaries and is gone out, and the area Bei Fu Sn surrounds.Mg2Si phase is significantly refined, from coarse Chinese character shape become it is dotted or
It corynebacterium and is evenly distributed.Macro, the microcosmic erosion profile and Fig. 5,6 of Mg-10%Sn-1.0%Si-0.3%Nd-0.7%Y alloy
Similar in (embodiment 1), for matrix only by slight local corrosion, erosion profile is in lamellar or filiform.The immersion of the alloy tries
Testing weight loss rate is 0.53mg/cm2H, corrosion current density are 47.8 μ Acm-2.Corrosion rate has dropped more than one
The order of magnitude, only about in comparative example alloy corrosion rate 1/13, i.e. corrosive nature improves 13 times.Corrosion current density decline
67.1%.Alloyage process of the invention is significant to alloy structure modification effect, and improves the magnesium alloy containing Si with can dramatically
Corrosion resistance.
The corrosion behavior of each alloy in 1 comparative example 1 of table and Examples 1 to 4
Embodiments of the present invention are simultaneously not restricted by the embodiments, other any real without departing from spirit of the invention
Made changes, modifications, substitutions, combinations, simplifications under matter and principle, should be equivalent substitute mode, are included in the present invention
Protection scope within.
Claims (8)
1. a kind of corrosion-resistant magnesium alloy containing Si, it is characterised in that: including following components by weight percentage:
Sn:6~10%；
Si:0.7~1%；
RE:0.3~1%；
Mg: surplus；
The RE is Nd and/or Y.
2. according to claim 1 containing the corrosion-resistant magnesium alloy of Si, it is characterised in that: when RE is Nd and Y, the weight content of Nd
Weight content greater than Y.
3. the preparation method of the corrosion-resistant magnesium alloy according to claim 1 or claim 2 containing Si, it is characterised in that: the following steps are included:
(1) it melts pure magnesium: in protective atmosphere, magnesium ingot being melted, obtains pure Serum Magnesium；
(2) alloying: magnesium-silicon intermediate alloy, pure Sn and magnesium-RE intermediate alloy being added into melt obtained by step (1), melt,
Stirring stands heat preservation, obtains magnesium alloy fused mass；RE is Nd or Y in magnesium-RE intermediate alloy；Magnesium-RE intermediate alloy is in magnesium-Nd
Between alloy and/or magnesium-Y intermediate alloy；
(3) cast alloys: carrying out the magnesium alloy fused mass of step (2) to pull out slag, and casting obtains corrosion-resistant magnesium alloy containing Si.
4. the preparation method of the corrosion-resistant magnesium alloy containing Si according to claim 3, it is characterised in that: the specific step of step (2)
Rapid in order magnesium-silicon intermediate alloy and pure Sn to be added into pure Serum Magnesium obtained by step (1), fusing is mixed, and is then added among magnesium-RE
Alloy carries out Metamorphism treatment, stirs after fusing, stands heat preservation, obtains magnesium alloy fused mass.
5. the preparation method of the corrosion-resistant magnesium alloy containing Si according to claim 4, it is characterised in that: the specific step of step (2)
In rapid, the mixing stirs 1~2min after referring to sufficiently fusing；The temperature melted in the fusing mixing is 730~770 DEG C；
The temperature of the Metamorphism treatment is 730~770 DEG C；The time stirred after the fusing is 1~2min, the standing heat preservation
Time be 8~12min.
6. the preparation method of the corrosion-resistant magnesium alloy containing Si according to claim 3, it is characterised in that: magnesium-described in step (2)
Silicon intermediate alloy is Mg-3%Si；Magnesium-RE intermediate alloy is Mg-20%RE intermediate alloy, i.e. Mg-20%Y and/or Mg-20%
Nd intermediate alloy.
7. the preparation method of the corrosion-resistant magnesium alloy containing Si according to claim 3, it is characterised in that: melted in step (1)
Temperature is 730~770 DEG C；
Protective atmosphere described in step (1) is SF6And N2Mixed gas.
8. the preparation method of the corrosion-resistant magnesium alloy containing Si according to claim 3, it is characterised in that: fusing, guarantor in step (2)
The temperature of temperature is 730~770 DEG C alone；
Casting refers in step (3) casts in the carbon steel mold after preheated；The preheating temperature of mold be 180~
210℃。
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070178006A1 (en) * | 2006-01-27 | 2007-08-02 | Aisin Seiki Kabushiki Kaisha | Magnesium alloy and casting |
| CN101948975A (en) * | 2010-09-21 | 2011-01-19 | 华南理工大学 | Mg-Sn-Si-La series heat-resistant magnesium alloy and preparation method thereof |
| CN101982553A (en) * | 2010-09-21 | 2011-03-02 | 华南理工大学 | Heat resistant magnesium alloy without Al and preparation method thereof |
| CN102242298A (en) * | 2011-07-04 | 2011-11-16 | 四川大学 | Al and Zn strengthened Mg-Sn-RE-based high-toughness heat-resistant magnesium alloy |
| CN102676896A (en) * | 2012-05-24 | 2012-09-19 | 狄石磊 | Corrosion resistant magnesium alloy material and preparation method thereof |
| CN104862567A (en) * | 2015-06-09 | 2015-08-26 | 太原科技大学 | High-Sn wrought magnesium alloy and preparation method of high-Sn wrought magnesium alloy panel |
| CN107739946A (en) * | 2017-12-01 | 2018-02-27 | 朱旭 | A kind of corrosion-resistant magnesium alloy and preparation method thereof |
-
2019
- 2019-03-26 CN CN201910233490.2A patent/CN109881060B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070178006A1 (en) * | 2006-01-27 | 2007-08-02 | Aisin Seiki Kabushiki Kaisha | Magnesium alloy and casting |
| CN101948975A (en) * | 2010-09-21 | 2011-01-19 | 华南理工大学 | Mg-Sn-Si-La series heat-resistant magnesium alloy and preparation method thereof |
| CN101982553A (en) * | 2010-09-21 | 2011-03-02 | 华南理工大学 | Heat resistant magnesium alloy without Al and preparation method thereof |
| CN102242298A (en) * | 2011-07-04 | 2011-11-16 | 四川大学 | Al and Zn strengthened Mg-Sn-RE-based high-toughness heat-resistant magnesium alloy |
| CN102676896A (en) * | 2012-05-24 | 2012-09-19 | 狄石磊 | Corrosion resistant magnesium alloy material and preparation method thereof |
| CN104862567A (en) * | 2015-06-09 | 2015-08-26 | 太原科技大学 | High-Sn wrought magnesium alloy and preparation method of high-Sn wrought magnesium alloy panel |
| CN107739946A (en) * | 2017-12-01 | 2018-02-27 | 朱旭 | A kind of corrosion-resistant magnesium alloy and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111455246A (en) * | 2020-03-02 | 2020-07-28 | 华南理工大学 | High-thermal-conductivity magnesium alloy and preparation method thereof |
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