CN106834815B - A kind of aluminium zirconium carbon rare earth fining agent and preparation method thereof - Google Patents
A kind of aluminium zirconium carbon rare earth fining agent and preparation method thereof Download PDFInfo
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- CN106834815B CN106834815B CN201710105945.3A CN201710105945A CN106834815B CN 106834815 B CN106834815 B CN 106834815B CN 201710105945 A CN201710105945 A CN 201710105945A CN 106834815 B CN106834815 B CN 106834815B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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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
- C22C1/026—Alloys based on aluminium
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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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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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
Abstract
A kind of aluminium zirconium carbon rare earth fining agent and preparation method thereof, the aluminium zirconium carbon rare earth fining agent is made up of the composition of following mass percent：Zr 4.5~5.5%, C 0.8~1.2%, RE 0.1~0.5%, surplus are Al and inevitable impurity.The preparation method of the aluminium zirconium carbon rare earth fining agent includes：Mixing zirconium powder and carbon dust, fusing fine aluminium ingot, aluminium zirten liquid, addition rare earth RE, casting or continuous casting and rolling are prepared into aluminium zirconium carbon rare earth fining agent.Aluminium zirconium carbon rare earth fining agent of the present invention has the advantages of ZrC particles are evenly distributed, grain refining capability is strong and cleanliness factor is high, magnesium alloy can be made to obtain the grain structure of more fine uniform, meet high-cleanness, the production needs of high bright, high-accuracy magnesium alloy deep processed product, there is wide market application foreground.
Description
Technical field
The invention belongs to fining agent technical field, is specifically related to a kind of aluminium zirconium carbon rare earth fining agent and preparation method thereof.
Background technology
Magnesium alloy is structural metallic materials most light in current commercial Application, have density is small, specific strength and specific stiffness are high,
The advantages that damping shock absorption is good, effectiveness is good, in automobile, motorcycle, electronic information, track traffic, Aero-Space etc.
Field has very big application potential.But the absolute intensity of most of magnesium alloys is still relatively low, secondly, magnesium alloy is close-packed hexagonal
Crystal structure, its temperature-room type plasticity deformability is poor, limits the products such as wrought magnesium alloy strip, tubing, section bar and forging
Production and application.Crystal grain refinement is the effective ways for improving magnesium alloy mechanical property and improving magnesium alloy plastic deformation ability, together
When crystal grain refinement also contribute to the uniformity of Magnesium Alloy, improve the decay resistance of magnesium alloy, reduce hot tearing and group
Knit the casting flaw such as loose.
Early in 1931, people found that element Zr has obvious grain refining effect to pure magnesium, are added in pure magnesium liquid
Minimal amount of zirconium, so that it may greatly improve the nucleation rate of pure magnesium, play the effect of crystal grain thinning.But the element such as Zr and Al, Mn can shape
Into stable compound, the effect of crystal grain thinning is not had.For example, adding Zr in the magnesium alloy containing Al, Zr and Al can be formed
Stable Al3Zr compounds, and Al3Zr B.C.T. shape crystal structure and the Patterns for Close-Packed Hexagonal Crystal structure of magnesium are entirely different, and
The lattice constant of the two differs greatly, therefore, Al3Zr cannot function as the heterogeneous forming core core of magnesium crystal grain, while form Al3Zr will
Cause the loss of Al and Zr in magnesium alloy.Therefore, the crystal grain that single Zr elements cannot function as the magnesium alloy containing Al, Mn element is thin
Agent.Later it is found that it is all solid matter six that ZrC particles, which have the characteristics of fusing point is high, stability is good, particularly ZrC particles and magnesium,
The square crystal structure and lattice constant of the two is close, lattice constant mismatch degree is very low, according to metallography lattice match principle,
ZrC particles are the excellent heterogeneous nucleis of magnesium, are developed the aluminium zirten of the particle containing ZrC accordingly as magnesium alloy
Grain refiner, solve the problems, such as the crystal grain refinement of the magnesium alloy containing elements such as Al, Mn.
At present, aluminium zirten is mainly prepared using thermit reaction method, i.e., using zirconium source and carbon source as raw material, by zirconium source and carbon
Source is added in aluminum melt, and the aluminium alloy containing ZrC particles is generated by reacting, and aluminium alloy then is cast as into aluminium zirconium carbon again closes
Ingot or continuous casting and rolling are into aluminium zirten bar.But in the preparation method, due to ZrC particles large number of in aluminium alloy and
Size is tiny, has very strong compatibility between particle, along with nonequilibrium freezing characteristic be present in aluminium alloy process of setting, most
Cause serious ZrC particle segregations reunion in aluminium zirten be present eventually, and the segregation of ZrC particles reunion can not only reduce crystal grain
The grain refining capability of fining agent, accelerate the decline of grain refining capability, also result in the surface production of magnesium alloy deep processed product
The defects of greensand eye, pin hole.In addition, this method can produce substantial amounts of hydrogen and oxidation because temperature is high and thermit reaction is violent
The slags such as aluminium, serious environmental pollution is not only resulted in, can also increase the nonmetal inclusion such as hydrogen, aluminum oxide in aluminium zirten
The content of the metallic impurity elements such as thing and Fe, Si, the cleanliness factor of grain refiner is reduced, and finally influence whether to use crystal grain
The cleanliness factor of the magnesium alloy of fining agent, high-cleanness, the production need of high bright, high-accuracy magnesium alloy deep processed product can not be met
Will.
The content of the invention
It is an object of the invention to problem and shortage be present for above-mentioned, there is provided a kind of ZrC particles are evenly distributed, crystal grain is thin
Aluminium zirconium carbon rare earth fining agent that change ability is strong and cleanliness factor is high and preparation method thereof.
The technical proposal of the invention is realized in this way：
Aluminium zirconium carbon rare earth fining agent of the present invention, is characterized in being made up of the composition of following mass percent：Zr
4.5~5.5%, C 0.8~1.2%, RE 0.1~0.5%, surplus is Al and inevitable impurity, wherein the composition of the RE
And mass percent is：Pr 8.5%, Nd 9.2%, Pm 12.5%, Sm 6.7%, Tb 15.9%, Dy 11.4%, Ho 10.7%, Tm
7.5%, Yb 13.2%, Lu 4.4%.
The preparation method of aluminium zirconium carbon rare earth fining agent of the present invention, is characterized in comprising the following steps：
The first step：It is 1 by mass percentage by zirconium powder and carbon dust:0.15~0.27 ratio is well mixed, and is then suppressed
Into prefabricated section；
Second step：Technical pure aluminium ingot is accounted for into aluminium ingot weight as 5.6~7.2% in 800~850 DEG C of heating fusings, then addition
Prefabricated section, stirring reaction 30~90 minutes removes scum silica frost above, aluminium zirten liquid obtained after refined degasification removal of impurities；
3rd step：The rare earth RE for accounting for that aluminium zirten liquid weight is 0.1~0.5%, stirring are added in aluminium zirten liquid
Obtain aluminium zirconium carbon rare earth alloy liquid；
4th step：Aluminium zirconium carbon rare earth alloy liquid is cooled to 700~740 DEG C and stands 30~60 minutes, is then cast as
Aluminium zirconium carbon rare earth alloy ingot or continuous casting and rolling obtain aluminium zirconium carbon rare earth fining agent into aluminium zirconium carbon rare earth alloy bar.
The present invention compared with prior art, has advantages below：
There is the aluminium zirconium carbon rare earth fining agent of the present invention ZrC particles to be more evenly distributed, grain refining capability is stronger and clean
The advantages of degree is higher, magnesium alloy can be made to obtain the grain structure of more fine uniform, meet that high-cleanness, height are bright, high-accuracy
Magnesium alloy deep processed product production need, there is wide market application foreground.
Embodiment
To make the purpose of the present invention, technical scheme and effect clearer, clear and definite, the present invention is made below further detailed
Describe in detail bright.
Aluminium zirconium carbon rare earth fining agent of the present invention, is made up of the composition of following mass percent：Zr 4.5~5.5%,
C 0.8~1.2%, RE 0.1~0.5%, surplus are Al and inevitable impurity.
Wherein, the composition of the RE and mass percent are：Pr 8.5%, Nd 9.2%, Pm 12.5%, Sm 6.7%, Tb
15.9%, Dy 11.4%, Ho 10.7%, Tm 7.5%, Yb 13.2%, Lu 4.4%.
The preparation method of aluminium zirconium carbon rare earth fining agent of the present invention, is comprised the steps of：
The first step：It is 1 by mass percentage by zirconium powder and carbon dust:0.15~0.27 ratio is well mixed, and is then suppressed
Into prefabricated section；
Second step：Technical pure aluminium ingot is fused into fine aluminium liquid in 800~850 DEG C of heating, is then added and is accounted for aluminium ingot weight and be
5.6~7.2% prefabricated section, stirring reaction 30~90 minutes, scum silica frost above is removed, aluminium zirconium is obtained after refined degasification removal of impurities
Carbon alloy liquid；
3rd step：The rare earth RE for accounting for that aluminium zirten liquid weight is 0.1~0.5%, stirring are added in aluminium zirten liquid
Obtain aluminium zirconium carbon rare earth alloy liquid；
4th step：Aluminium zirconium carbon rare earth alloy liquid is cooled to 700~740 DEG C and stands 30~60 minutes, is then cast as
Aluminium zirconium carbon rare earth alloy ingot or continuous casting and rolling obtain aluminium zirconium carbon rare earth fining agent into aluminium zirconium carbon rare earth alloy bar.
Wherein, Zr and C is the main alloy element of aluminium zirconium carbon rare earth fining agent, by zirconium powder and the mixture and aluminium liquid of carbon dust
Reaction obtains, and mainly exists in fining agent with ZrC particulate forms.ZrC particles have the characteristics of fusing point is high, stability is strong, special
It is not that ZrC particles have same Patterns for Close-Packed Hexagonal Crystal structure with magnesium and lattice constant is close, lattice constant mismatch degree is low, is magnesium
The excellent heterogeneous nuclei of crystal grain, play magnesium alloy grains effect.Zr and C content is higher, the quantity of ZrC particles
Also more, grain refining effect is also better.But Zr and C content is too high, the solidifying segregation of aluminium zirten is also more difficult, melting
Prepare and cast or continuous casting and rolling is all extremely difficult.Therefore, the selection of Zr contents is 4.5~5.5%, C content selection 0.8~
1.2%。
RE is mixed containing six kinds of heavy rare earth elements of tetra- kinds of LREEs of Pr, Nd, Pm, Sm and Tb, Dy, Ho, Tm, Yb, Lu
Rare earth is closed, the physicochemical properties of mischmetal are very active, have following main function in aluminium zirten：（1）First,
Rare earth is surface active element, can reduce the surface tension of aluminium zirten liquid, improves the mobility of aluminium zirten liquid, drop
The surface energy of low ZrC particles, so as to reduce the segregation of ZrC particles reunion tendency, ZrC particles are made to be more evenly distributed in aluminium zirconium
In carbon alloy, increase effective number of nuclei of ZrC particles, and then improve the grain refining capability of aluminium zirten.In addition, ZrC
Particle distribution is more uniform, with regard to that can slow down sinking speed of the ZrC particles in liquid magnesium alloy, so as to improve the anti-of aluminium zirten
Fading of refinement ability.（2）Secondly, rare earth element has very high chemism, with the metal such as hydrogen, oxygen, iron, silicon and nonmetallic miscellaneous
Prime element has very strong chemical affinity, and the rare earth chemical combination of high stability can be generated with impurity reactions such as hydrogen, oxygen, iron, silicon
Thing, and eventually through floating or sinking to being removed, so as to have the catharsis of depth to aluminium zirten liquid, make aluminium zirconium
Carbon alloy obtains higher cleanliness factor, meets high-cleanness, the production needs of high bright, high-accuracy magnesium alloy deep processed product,
With wide market application foreground.
The lot of experiments of inventor shows, addition containing tetra- kinds of LREEs of Pr, Nd, Pm, Sm and Tb, Dy, Ho,
The effect of the mischmetal of six kinds of heavy rare earth elements of Tm, Yb, Lu is all better than adding a kind of or a few rare earth element effect.
It also requires it is realized that, expensive due to rare earth element, excessive addition rare earth element can also increase aluminium zirten
Production cost.Through considering effect and cost factor, the addition of RE mischmetals is selected 0.1~0.5%.
The preparation method of the present invention, by optimizing the mixed proportion and addition of zirconium powder and carbon dust, first prepares aluminium zirconium carbon
Aluminium alloy, after removing the gred and refining degasification removal of impurities, rare earth is added, be advantageous to give full play to rare earth to improving aluminium zirten
ZrC particles distributing homogeneity, grain refining capability and cleanliness factor effect, it is ensured that it is equal can finally to obtain the distribution of ZrC particles
Even property, the aluminium zirconium carbon rare earth fining agent that grain refining capability is strong and cleanliness factor is high.
In order to more describe aluminium zirconium carbon rare earth fining agent of the present invention and preparation method thereof in detail, several implementations are exemplified below
Example is further described.
Embodiment 1：
Aluminium zirconium carbon rare earth fining agent of the present invention, is made up of the composition of following mass percent：Zr 5%, C 1.0%,
RE 0.3%, surplus is Al and inevitable impurity, wherein the composition of the RE and mass percent are：Pr 8.5%, Nd
9.2%, Pm 12.5%, Sm 6.7%, Tb 15.9%, Dy 11.4%, Ho 10.7%, Tm 7.5%, Yb 13.2%, Lu 4.4%.
The preparation method of the aluminium zirconium carbon rare earth fining agent comprises the steps of：
The first step：It is 1 by mass percentage by zirconium powder and carbon dust:0.2 ratio is well mixed, and is then pressed into prefabricated
Block；
Second step：Technical pure aluminium ingot is fused into fine aluminium liquid in 825 DEG C of heating, it is 6.4% then to add and account for aluminium ingot weight
Prefabricated section, stirring reaction 60 minutes, removes scum silica frost above, and aluminium zirten is obtained after being cleaned with carbon trichloride refining degasification
Liquid；
3rd step：The mixed rare earth for accounting for that aluminium zirten liquid weight is 0.3%, stirring are added in aluminium zirten liquid
Obtain aluminium zirconium carbon rare earth alloy liquid；
4th step：Aluminium zirconium carbon rare earth alloy liquid is cooled to 720 DEG C and stands 45 minutes, is then cast as aluminium zirconium carbon rare earth
Alloy pig or continuous casting and rolling obtain the aluminium zirconium carbon rare earth fining agent into aluminium zirconium carbon rare earth alloy bar.
Embodiment 2：
Aluminium zirconium carbon rare earth fining agent of the present invention, is made up of the composition of following mass percent：Zr 4.5%, C
0.8%, RE 0.1%, surplus is Al and inevitable impurity, wherein the composition of the RE and mass percent are：Pr 8.5%,
Nd 9.2%, Pm 12.5%, Sm 6.7%, Tb 15.9%, Dy 11.4%, Ho 10.7%, Tm 7.5%, Yb 13.2%, Lu 4.4%.
The preparation method of the aluminium zirconium carbon rare earth fining agent comprises the steps of：
The first step：It is 1 by mass percentage by zirconium powder and carbon dust:0.18 ratio is well mixed, and is then pressed into prefabricated
Block；
Second step：Technical pure aluminium ingot is fused into fine aluminium liquid in 800 DEG C of heating, it is 5.6% then to add and account for aluminium ingot weight
Prefabricated section, stirring reaction 30 minutes, removes scum silica frost above, and aluminium zirten is obtained after being cleaned with carbon trichloride refining degasification
Liquid；
3rd step：The mixed light rare earth RE for accounting for that aluminium zirten liquid weight is 0.1% is added in aluminium zirten liquid, is stirred
Mix to obtain aluminium zirconium carbon rare earth alloy liquid；
4th step：Aluminium zirconium carbon rare earth alloy liquid is cooled to 700 DEG C and stands 30 minutes, is then cast as aluminium zirconium carbon rare earth
Alloy pig or continuous casting and rolling obtain the aluminium zirconium carbon rare earth fining agent into aluminium zirconium carbon rare earth alloy bar.
Embodiment 3：
Aluminium zirconium carbon rare earth fining agent of the present invention, is made up of the composition of following mass percent：Zr 5.5%, C
1.2%, RE 0.5%, surplus is Al and inevitable impurity, wherein the composition of the RE and mass percent are：Pr 8.5%,
Nd 9.2%, Pm 12.5%, Sm 6.7%, Tb 15.9%, Dy 11.4%, Ho 10.7%, Tm 7.5%, Yb 13.2%, Lu 4.4%.
The preparation method of the aluminium zirconium carbon rare earth fining agent comprises the steps of：
The first step：It is 1 by mass percentage by zirconium powder and carbon dust:0.22 ratio is well mixed, and is then pressed into prefabricated
Block；
Second step：Technical pure aluminium ingot is fused into fine aluminium liquid in 850 DEG C of heating, it is 7.2% then to add and account for aluminium ingot weight
Prefabricated section, stirring reaction 90 minutes, removes scum silica frost above, and aluminium zirten is obtained after being cleaned with carbon trichloride refining degasification
Liquid；
3rd step：The mixed light rare earth RE for accounting for that aluminium zirten liquid weight is 0.5% is added in aluminium zirten liquid, is stirred
Mix to obtain aluminium zirconium carbon rare earth alloy liquid；
4th step：Aluminium zirconium carbon rare earth alloy liquid is cooled to 740 DEG C and stands 60 minutes, is then cast as aluminium zirconium carbon rare earth
Alloy pig or continuous casting and rolling obtain the aluminium zirconium carbon rare earth fining agent into aluminium zirconium carbon rare earth alloy bar.
Embodiment 4：
Aluminium zirconium carbon rare earth fining agent of the present invention, is made up of the composition of following mass percent：Zr 4.5%, C
1.2%, RE 0.2%, surplus is Al and inevitable impurity, wherein the composition of the RE and mass percent are：Pr 8.5%,
Nd 9.2%, Pm 12.5%, Sm 6.7%, Tb 15.9%, Dy 11.4%, Ho 10.7%, Tm 7.5%, Yb 13.2%, Lu 4.4%.
The preparation method of the aluminium zirconium carbon rare earth fining agent comprises the steps of：
The first step：It is 1 by mass percentage by zirconium powder and carbon dust:0.27 ratio is well mixed, and is then pressed into prefabricated
Block；
Second step：Technical pure aluminium ingot is fused into fine aluminium liquid in 815 DEG C of heating, then add account for aluminium ingot weight be 6% it is pre-
Clamp dog, stirring reaction 45 minutes, removes scum silica frost above, and aluminium zirten liquid is obtained after being cleaned with carbon trichloride refining degasification；
3rd step：The mixed rare earth for accounting for that aluminium zirten liquid weight is 0.2%, stirring are added in aluminium zirten liquid
Obtain aluminium zirconium carbon rare earth alloy liquid；
4th step：Aluminium zirconium carbon rare earth alloy liquid is cooled to 710 DEG C and stands 40 minutes, is then cast as aluminium zirconium carbon rare earth
Alloy pig or continuous casting and rolling obtain the aluminium zirconium carbon rare earth fining agent into aluminium zirconium carbon rare earth alloy bar.
Embodiment 5：
Aluminium zirconium carbon rare earth fining agent of the present invention, is made up of the composition of following mass percent：Zr 5.5%, C
0.8%, RE 0.4%, surplus is Al and inevitable impurity, wherein the composition of the RE and mass percent are：Pr 8.5%,
Nd 9.2%, Pm 12.5%, Sm 6.7%, Tb 15.9%, Dy 11.4%, Ho 10.7%, Tm 7.5%, Yb 13.2%, Lu 4.4%.
The preparation method of the aluminium zirconium carbon rare earth fining agent comprises the steps of：
The first step：It is 1 by mass percentage by zirconium powder and carbon dust:0.15 ratio is well mixed, and is then pressed into prefabricated
Block；
Second step：Technical pure aluminium ingot is fused into fine aluminium liquid in 840 DEG C of heating, it is 6.7% then to add and account for aluminium ingot weight
Prefabricated section, stirring reaction 75 minutes, removes scum silica frost above, and aluminium zirten is obtained after being cleaned with carbon trichloride refining degasification
Liquid；
3rd step：The mixed rare earth for accounting for that aluminium zirten liquid weight is 0.4%, stirring are added in aluminium zirten liquid
Obtain aluminium zirconium carbon rare earth alloy liquid；
4th step：Aluminium zirconium carbon rare earth alloy liquid is cooled to 730 DEG C and stands 50 minutes, is then cast as aluminium zirconium carbon rare earth
Alloy pig or continuous casting and rolling obtain the aluminium zirconium carbon rare earth fining agent into aluminium zirconium carbon rare earth alloy bar.
The present invention is described by embodiment, but is not limited the invention, with reference to description of the invention, institute
Other changes of disclosed embodiment, are such as readily apparent that, such change should belong to for the professional person of this area
Within the scope of the claims in the present invention limit.
Claims (1)
1. a kind of preparation method of aluminium zirconium carbon rare earth fining agent, aluminium zirconium carbon rare earth fining agent prepared by this method is by following quality hundred
Divide the composition composition of ratio：Zr 4.5~5.5%, C 0.8~1.2%, RE 0.1~0.5%, surplus be Al and inevitably it is miscellaneous
Matter, the composition and mass percent of the RE are：Pr 8.5%, Nd 9.2%, Pm 12.5%, Sm 6.7%, Tb 15.9%, Dy
11.4%, Ho 10.7%, Tm 7.5%, Yb 13.2%, Lu 4.4%, it is characterised in that this method comprises the following steps：
The first step：It is 1 by mass percentage by zirconium powder and carbon dust:0.15~0.27 ratio is well mixed, and is then pressed into pre-
Clamp dog；
Second step：By technical pure aluminium ingot 800~850 DEG C heating fusing, then add account for aluminium ingot weight be 5.6~7.2% it is pre-
Clamp dog, stirring reaction 30~90 minutes, scum silica frost above is removed, aluminium zirten liquid is obtained after refined degasification removal of impurities；
3rd step：The rare earth RE for accounting for that aluminium zirten liquid weight is 0.1~0.5% is added in aluminium zirten liquid, stirring obtains
Aluminium zirconium carbon rare earth alloy liquid；
4th step：Aluminium zirconium carbon rare earth alloy liquid is cooled to 700~740 DEG C and stands 30~60 minutes, is then cast as aluminium zirconium
Carbon rare earth alloy ingot or continuous casting and rolling obtain aluminium zirconium carbon rare earth fining agent into aluminium zirconium carbon rare earth alloy bar.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1485451A (en) * | 2002-09-28 | 2004-03-31 | 东南大学 | Composite grain refiner for aluminium, aluminum alloy and preparing process therefor |
| CN102146530A (en) * | 2011-03-15 | 2011-08-10 | 新星化工冶金材料(深圳)有限公司 | Magnesium and magnesium alloy grain refining agent and preparation method thereof |
| CN106319263A (en) * | 2016-11-03 | 2017-01-11 | 四川大学 | Aluminum titanium carbonitride alloy grain refiner and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090260724A1 (en) * | 2008-04-18 | 2009-10-22 | United Technologies Corporation | Heat treatable L12 aluminum alloys |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1485451A (en) * | 2002-09-28 | 2004-03-31 | 东南大学 | Composite grain refiner for aluminium, aluminum alloy and preparing process therefor |
| CN102146530A (en) * | 2011-03-15 | 2011-08-10 | 新星化工冶金材料(深圳)有限公司 | Magnesium and magnesium alloy grain refining agent and preparation method thereof |
| CN106319263A (en) * | 2016-11-03 | 2017-01-11 | 四川大学 | Aluminum titanium carbonitride alloy grain refiner and preparation method thereof |
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