CN104841896A - Method for producing metal semisolid slurry - Google Patents

Method for producing metal semisolid slurry Download PDF

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Publication number
CN104841896A
CN104841896A CN201510277675.5A CN201510277675A CN104841896A CN 104841896 A CN104841896 A CN 104841896A CN 201510277675 A CN201510277675 A CN 201510277675A CN 104841896 A CN104841896 A CN 104841896A
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CN
China
Prior art keywords
metal
semi
slurrg
solid
solid metal
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CN201510277675.5A
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Chinese (zh)
Inventor
林荣英
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林荣英
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Priority to CN201510277675.5A priority Critical patent/CN104841896A/en
Publication of CN104841896A publication Critical patent/CN104841896A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00Treatment of fused masses in the ladle or the supply runners before casting

Abstract

The invention discloses a method for producing metal semisolid slurry. The method includes steps of storing fused metal or alloy (1) in a container (2); cooling the fused metal or alloy (1) in the container (2) below the liquidus; adding the fused metal or alloy (3) into the container (2) to form metal semisolid slurry (4). The method for producing metal semisolid slurry is simple in technical process, easy to control, low in production cost and easy in industrial application in large scale.

Description

A kind of method of producing semi-solid metal slurrg
Technical field
The invention belongs to the semi-solid forming technical field of metal, be specifically related to a kind of method of producing semi-solid metal slurrg.
Background technology
As everyone knows, it is large that semi-solid-state metal slurry has viscosity relative to liquid metal, the features such as solidification shrinkage is little, the corresponding part thus using the part of Semisolid Metal Forming shaping relative to ordinary liquid has many advantages, as less pore and shrinkage cavity defect, better mechanical performance etc.; Separately, relative to formed solid method, the resistance of deformation of semi-solid-state metal slurry is very little, and it is shaping to carry out Complex Parts, and processing cost is low.Therefore, Semisolid Metal Forming is called as 21 century the most promising metal material processing method with its many superiority.The making of semi-solid-state metal slurry is the key of Semisolid Metal Forming technology; At present, prepare the method with the semi-solid-state metal slurry of globular crystal structure to mainly contain: mechanical mixing method, electromagnetic stirring method, ultrasonic wave paddling process, dc-pulse method etc.The technological process relative complex of these methods, technological parameter are wayward, cause production cost relatively high, to such an extent as to up to the present, the semi-solid forming technology of metal does not also obtain industrial applications in very large scope.
Summary of the invention
The object of the present invention is to provide a kind of method of producing semi-solid metal slurrg, technological process is very simple and be easy to control, and production cost is extremely low, is easy to realize large-scale commercial application.
For achieving the above object, the present invention adopts following technical scheme:
A kind of concrete steps of producing the method for semi-solid metal slurrg are as follows:
A motlten metal or alloy (1) are placed in a container (2) by ();
B motlten metal in container (2) or alloy (1) are cooled to below its liquidus curve by ();
C () adds motlten metal or alloy (3) in container (2), form semi-solid metal slurrg (4).
Motlten metal in described step (a) or alloy (1) are identical or different with the chemical composition of the motlten metal in described step (c) or alloy (3).
Motlten metal in described step (b) or alloy (1) are in solid-liquid state or are frozen into solid completely after cooling.
The uniformity increasing this slurry is stirred to the semi-solid metal slurrg (4) formed in described step (c).
The solids content of the semi-solid metal slurrg (4) formed in described step (c) is at least 1 wt%.
The solids content of the semi-solid metal slurrg (4) formed in described step (c) is no more than 60 wt%.
Beneficial effect of the present invention is:
1) technological process of the present invention is very simple, and is easy to control;
2) apply pulping process of the present invention, the production cost of slurry is extremely low;
3) the present invention is easy to realize large-scale commercial application.
Accompanying drawing explanation
Fig. 1 is process schematic representation of the present invention;
Fig. 2 is the microphoto of the metal composites of embodiments of the invention 1, comprises the secondary solid phase formed in spherical primary solids phase and cold quenching process.
Detailed description of the invention
A kind of concrete steps of producing the method for semi-solid metal slurrg are as follows:
A motlten metal or alloy (1) are placed in a container (2) by ();
B motlten metal in container (2) or alloy (1) are cooled to below its liquidus curve by ();
C () adds motlten metal or alloy (3) in container (2), form semi-solid metal slurrg (4).
Motlten metal in described step (a) or alloy (1) are identical or different with the chemical composition of the motlten metal in described step (c) or alloy (3).
Motlten metal in described step (b) or alloy (1) are in solid-liquid state or are frozen into solid completely after cooling.
The uniformity increasing this slurry is stirred to the semi-solid metal slurrg (4) formed in described step (c).
The solids content of the semi-solid metal slurrg (4) formed in described step (c) is at least 1 wt%.
The solids content of the semi-solid metal slurrg (4) formed in described step (c) is no more than 60 wt%.
It is pointed out that the solids content when the semi-solid metal slurrg (4) formed is less than 10wt%, its viscosity is relatively low; The agitating procedure (as mechanical agitation, electromagnetic agitation etc.) added can not be needed to reach the object of slurry homogenising.But when the solids content of the semi-solid metal slurrg (4) formed is greater than 20wt%, its viscosity is relatively high, the general agitating procedure (as mechanical agitation, electromagnetic agitation etc.) added that needs is to reach the object of slurry homogenising.
The semi-solid metal slurrg (4) formed is at least 1wt% through cooled solids content, is preferably at least 10wt%, is more preferably at least 20wt%; Its key is, the selection of the solids content of the semi-solid metal slurrg (4) of formation, should guarantee its generation suppressing metal Dendritic TiC structure and network when further cooling and solidifying.
The semi-solid metal slurrg (4) formed solids content after cooling is no more than 60wt%, preferably more than 50wt%, more preferably no more than 40wt%; Higher solids content may make slurry be not easy to carry out further semi-solid processing.
The present invention's the following example further illustrates the present invention, but protection scope of the present invention is not limited to the following example.
Fig. 1 shows four independent processes of the present invention.Step 1 shows a container (2), and the motlten metal (1) of constant weight is housed in container (2).Step 2 shows container (2) in step 1 and motlten metal (1); Motlten metal (1) in container (2) has been cooled to below the liquidus curve of this metal, and namely the motlten metal (1) of part is frozen into solid.Step 3 shows container (2) in step 2 and another container (5); The metal (3) of melting is housed in container (5), and a certain amount of motlten metal (3) has been added in container (2), and mixes formation semi-solid-state metal slurry (4) with the metal (1) in step 2.Step 4 shows container (2) in step 3 and semi-solid-state metal slurry (4), and a mechanical stirring device (6); By mechanical agitation, the uniformity of semi-solid-state metal slurry (4) is increased.
The solids ratio of semi-solid-state metal slurry (4) can by the weight of the motlten metal (1) in loaded container (2) and temperature, to the cool time of the motlten metal (1) in loaded container (2), and the parameter such as weight and temperature of added motlten metal (3) is regulated control.In many cases, it is desirable that the solids ratio of semi-solid-state metal slurry (4) is controlled between 10-30%; Because in this ratio ranges, semi-solid-state metal slurry (4) has had enough solids contents and has produced Dendritic TiC to prevent it entering cold cut process, and semi-solid-state metal slurry (4) still has enough mobility from container (2), pours out (non-illustrate) simultaneously.
Embodiment 1
Below the production method of Al-7wt%Si aluminium alloy semi-solid slurry and device are illustrated.
First an internal diameter be about 130 millimeters, wall thickness is about 16 millimeters, highly for " clay-graphite " crucible heating of about 180 millimeters is to about 500 DEG C; Then pour the melting Al-7wt%Si aluminium alloy of about 2000 grams into toward this crucible, the temperature of the aluminium alloy at this moment in crucible is 625 DEG C (liquidus temperature of this Al-7wt%Si aluminium alloy is about 616 DEG C, and solidus temperature is about 572 DEG C); Then the aluminium alloy in crucible is allowed naturally to cool, when the temperature of the aluminium alloy in crucible drops to about 600 DEG C, the melting Al-7wt%Si aluminium alloy of about 3000 grams about 630 DEG C is added in crucible, the temperature of the aluminium alloy at this moment in crucible is about 612 DEG C, and namely the aluminium alloy semi-solid slurry of about 5000 grams is formed; Then carry out mechanical agitation about 30 seconds to the semisolid slurry in crucible, the temperature of about 5000 grams of semisolid slurries at this moment in crucible drops to about 601 DEG C.A small amount of semisolid slurry is by taking-up from crucible and at cold quenching-in water; The microstructure obtained as shown in Figure 2; As can be seen from Figure 2, use the semisolid slurry that the method disclosed by the present invention is produced, its primary solids is globular crystal structure mutually.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.

Claims (10)

1. produce a method for semi-solid metal slurrg, it is characterized in that: concrete steps are as follows:
A motlten metal or alloy (1) are placed in a container (2) by ();
B motlten metal in container (2) or alloy (1) are cooled to below its liquidus curve by ();
C () adds motlten metal or alloy (3) in container (2), form semi-solid metal slurrg (4).
2. the method for production semi-solid metal slurrg according to claim 1, is characterized in that: the motlten metal in described step (a) or alloy (1) are identical or different with the chemical composition of the motlten metal in described step (c) or alloy (3).
3. the method for production semi-solid metal slurrg according to claim 1, is characterized in that: the motlten metal in described step (b) or alloy (1) are in solid-liquid state or are frozen into solid completely after cooling.
4. the method for production semi-solid metal slurrg according to claim 1, is characterized in that: the uniformity semi-solid metal slurrg (4) formed in described step (c) being stirred to increase to this slurry.
5. the method for production semi-solid metal slurrg according to claim 1, is characterized in that: the solids content of the semi-solid metal slurrg (4) formed in described step (c) is at least 1 wt%.
6. the method for production semi-solid metal slurrg according to claim 5, is characterized in that: the solids content of the semi-solid metal slurrg (4) formed in described step (c) is at least 10 wt%.
7. the method for production semi-solid metal slurrg according to claim 6, is characterized in that: the solids content of the semi-solid metal slurrg (4) formed in described step (c) is at least 20 wt%.
8. the method for production semi-solid metal slurrg according to claim 1, is characterized in that: the solids content of the semi-solid metal slurrg (4) formed in described step (c) is no more than 60 wt%.
9. the method for production semi-solid metal slurrg according to claim 8, is characterized in that: the solids content of the semi-solid metal slurrg (4) formed in described step (c) is no more than 50 wt%.
10. the method for production semi-solid metal slurrg according to claim 9, is characterized in that: the solids content of the semi-solid metal slurrg (4) formed in described step (c) is no more than 40 wt%.
CN201510277675.5A 2015-05-28 2015-05-28 Method for producing metal semisolid slurry Pending CN104841896A (en)

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CN201510277675.5A CN104841896A (en) 2015-05-28 2015-05-28 Method for producing metal semisolid slurry
PCT/CN2016/070194 WO2016188125A1 (en) 2015-05-28 2016-01-05 Method of producing semi-solid metal slurry

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105537552A (en) * 2016-02-02 2016-05-04 曹海平 Method and device for producing semi-solid slurry
WO2016188125A1 (en) * 2015-05-28 2016-12-01 林荣英 Method of producing semi-solid metal slurry

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04124232A (en) * 1990-09-12 1992-04-24 Leotec:Kk Method for starting continuous type half solidified metal producing apparatus
WO2006062482A1 (en) * 2004-12-10 2006-06-15 Magnus Wessen A method of and a device for producing a liquid-solid metal composition
CN102266914A (en) * 2011-08-08 2011-12-07 昆明理工大学 Method for preparing semisolid alloy slurry
CN104084545A (en) * 2014-07-25 2014-10-08 无锡职业技术学院 Metamorphic method for casting mixed liquid of Mg-Al alloy liquid melt and semi-solid melt
CN104550888A (en) * 2015-01-30 2015-04-29 林荣英 Method capable of continuously producing semisolid metal slurry

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5094700A (en) * 1990-03-22 1992-03-10 University Of Cincinnati Solder and brazing alloys having improved properties and method of preparation
CN1308102C (en) * 2004-02-20 2007-04-04 北京有色金属研究总院 Method of preparing semisolid alloy slurry and its equipment
CN104232953B (en) * 2014-09-18 2016-10-26 珠海市润星泰电器有限公司 A kind of light metal alloy preparation method of semisolid state slurry thereof
CN104841896A (en) * 2015-05-28 2015-08-19 林荣英 Method for producing metal semisolid slurry

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04124232A (en) * 1990-09-12 1992-04-24 Leotec:Kk Method for starting continuous type half solidified metal producing apparatus
WO2006062482A1 (en) * 2004-12-10 2006-06-15 Magnus Wessen A method of and a device for producing a liquid-solid metal composition
CN102266914A (en) * 2011-08-08 2011-12-07 昆明理工大学 Method for preparing semisolid alloy slurry
CN104084545A (en) * 2014-07-25 2014-10-08 无锡职业技术学院 Metamorphic method for casting mixed liquid of Mg-Al alloy liquid melt and semi-solid melt
CN104550888A (en) * 2015-01-30 2015-04-29 林荣英 Method capable of continuously producing semisolid metal slurry

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016188125A1 (en) * 2015-05-28 2016-12-01 林荣英 Method of producing semi-solid metal slurry
CN105537552A (en) * 2016-02-02 2016-05-04 曹海平 Method and device for producing semi-solid slurry

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Application publication date: 20150819