CN101347833A - Sine waveform device for preparing semi-solid metal slurry - Google Patents
Sine waveform device for preparing semi-solid metal slurry Download PDFInfo
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- CN101347833A CN101347833A CNA2008101412643A CN200810141264A CN101347833A CN 101347833 A CN101347833 A CN 101347833A CN A2008101412643 A CNA2008101412643 A CN A2008101412643A CN 200810141264 A CN200810141264 A CN 200810141264A CN 101347833 A CN101347833 A CN 101347833A
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- 239000002184 metal Substances 0.000 title claims abstract description 86
- 239000007787 solid Substances 0.000 title claims abstract description 32
- 239000002002 slurry Substances 0.000 title claims abstract description 31
- 230000000694 effects Effects 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 239000013078 crystal Substances 0.000 claims abstract description 10
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 27
- 238000005266 casting Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 235000013527 bean curd Nutrition 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 235000011962 puddings Nutrition 0.000 claims description 4
- 238000004512 die casting Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 33
- 230000008569 process Effects 0.000 abstract description 13
- 238000002360 preparation method Methods 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 229910000861 Mg alloy Inorganic materials 0.000 abstract description 2
- 238000013019 agitation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000006911 nucleation Effects 0.000 abstract description 2
- 238000010899 nucleation Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 229910000838 Al alloy Inorganic materials 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 14
- 239000000956 alloy Substances 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
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- 230000003647 oxidation Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a sine waveform device used for preparing semi-solid metal slurry and a preparation method thereof. A flow channel of liquid metal is designed into sine waveform in the device. The flow direction of the liquid metal can be changed constantly and realize automatic even agitation when low superheat liquid metal flows through. In addition, due to the cooling effect at the bottom and the sidewall, a large number of primary crystals are produced from the liquid metal, the primary crystals which do not grow up yet detach from the container wall to enter into the liquid metal under the impact of the subsequent liquid metal, and finally form semi-solid slurry with large amount of globular crystals at the outlet of the channel of a sine waveform container. By adjusting the number of waveform and the inclination angle of the sine waveform container, and the indenter height of the liquid metal inside an inlet container, the number of nucleation can be controlled, as well as grain refinement and equiaxial effect can also be affected. The sine waveform device of the invention has the advantages of simple structure, compact process, high efficiency on energy saving, short process, wide application range, and can realize the preparation of semi-solid metal slurry such as iron and steel materials, aluminum alloy, magnesium alloy, etc.
Description
Technical field
The invention belongs to the metal material processing forming technique, particularly the semi-solid-state metal process technology relates to a kind of sine waveform device for preparing semi-solid metal slurry and preparation method thereof.
Background technology
The semi-solid metal forming technique is a technology of the awfully hot door of the research over nearly 20 years, this technology can reach nearly end form and produce complex parts, good product performance, energy savings, enhance productivity, enlarge product scope, energy-efficient short flow process meets the direction of modern manufacturing industry greenization, therefore has wide industrial foundation and potentiality.
The key of semi-solid processing forming technique and prerequisite are to produce semi solid slurry.At present, the method for preparing semi solid slurry has multiple, as (machinery, electromagnetism) paddling process, strain activation method, ultrasonic agitation method, chemical grain refinement method, thermomechanical process etc.With regard to stirring technique, need the complicated stirring system of a cover, mechanical mixing method equipment is simple, but operating difficulties, stirring rod is polluted alloy, and gas, the impurity brought in the slurry are difficult for discharging, and directly have influence on the quality and the production efficiency of casting slurry.Electromagnetic agitating technology can the pollution metal slurry, can not be involved in gas, but equipment investment is big yet; complex process causes cost higher thereby energy consumption is high, in addition because " kelvin effect "; the ingot casting billet size of producing is restricted, and realizes that the difficulty of large-scale industrial production is bigger.The metal stock of strain activation method preparation is pure, output is big, but owing to increase by one predeformation operation, not only makes the cost raising but also billet size is restricted, thereby also be unfavorable for large-scale industrial production.Also there is the problem such as semi solid slurry preparation, conveying, solid rate control in additive method, makes this technology fail to obtain extensive use in industry.
Therefore, the researcher continually develops new semi solid slurry technology of preparing.Preparation method as a kind of ferroalloy semi solid slurry of Chinese patent 02145565.1 exploitation, to water near the molten metal of liquidus temperature on a slide plate with certain crystallization nucleation ability, because the cooling effect of slide plate makes the liquid metals that contacts with slide plate produce a large amount of nascent crystalline substances, these nascent crystalline substances of not growing up as yet hightail slide plate and enter molten metal under molten metal impact subsequently, finally obtain semi-solid metal slurry.By adjusting the inclination angle of this slide plate, control the flow velocity of metal paste in addition, and then can control the forming core number of molten metal, finally can influence the refinement of crystal grain and wait the axle effect.The semi-solid-state metal of preparation method's preparation of the ferroalloy semi solid slurry of this invention, crystal grain obtains tangible refinement than traditional casting method, the brilliant distributions of axle shape such as crystal grain is, the performances such as tensile strength, percentage elongation of metal are improved significantly, and production efficiency far surpasses other methods such as paddling process and strain activation method.But a problem of this method is a molten metal to be had when flowing on slide plate between the oxidation of molten metal and slide plate and the molten metal and sticks together easily.Chinese patent 200710011510.9 provides a kind of Wave type inclined plate vibration device and preparation method who prepares semi-solid alloy, the advantage of this method is to have improved the stirring action effect of molten metal in flowing, solve the adhesion of swash plate and molten metal, but still had problem of oxidation.Chinese patent 200410009295.5 provides a kind of and has flowed into spare-crucible again by over-heat metal liquid directly being poured into spare-crucible or pouring into the straight vertical tube passage earlier, the method for preparing semi-solid metal slurry, directly pouring into crucible acquisition semi-solid metal slurry needs the cast of accurate control pouring temperature highly wait technological parameter, pour into the straight vertical tube passage earlier when flowing into spare-crucible again and obtaining semi-solid metal slurry, stirring that molten metal is subjected to and cooling effect effect are not remarkable, often have any problem when preparation high solid fraction slurry.Chinese patent 200710176134.9 pours into over-heat metal liquid in the tiltedly straight multiple tube passage of one tipping tube and vertical tube composition, when over-heat metal liquid is mobile along the inwall of this tiltedly straight multiple tube passage, obtain semi-solid metal slurry, be injected into crucible then and move in the temperature controller, carry out follow-up cooling or Temperature Field Control.This method has overcome many defectives of all multi-methods in the past, have good effect, but the angle of inclination of tipping tube can't change in use, and after working long hours, metal residues appears in junction at tipping tube and vertical tube easily, may blocking pipe when serious.
In a word, the above-mentioned various methods that prepare semi-solid metal slurry are constantly brought forth new ideas, each tool advantage, but the place that in use also has some to comply with one's wishes not to the utmost still needs perfect.
Summary of the invention
The object of the present invention is to provide a kind of sine waveform device for preparing semi-solid metal slurry, acquisition equipment is simple, and technology is reliable, and production cost is low, applicable to the preparation method of various semi-solid metal slurries.
For realizing purpose of the present invention, take following process program:
1, produce overheated molten metal in the crucible for smelting stove, after handling through refining and slagging-off etc., the temperature of adjusting molten metal is controlled at the above 0-200 of its liquidus temperature ℃ (composition according to molten metal is determined);
2, this molten metal is poured into the inlet container in sinusoidal waveform container path the place ahead, the fall head that keeps inlet container inner metal liquid is 200mm-800mm (composition according to molten metal is determined), has certain flow velocity to guarantee the molten metal that enters the sinusoidal waveform container path;
3, over-heat metal liquid flows downward along the sinusoidal waveform vias inner walls, enters from the passage rear exit and collects container or former, realizes thixotroping moulding or rheoforging as crucible or common casting mold, die casting machine injection chamber etc.
Sinusoidal waveform container path wavelength of the present invention is 500～5000mm, and amplitude is 100-500mm, and channel width is 50-150mm.Can adjust the sinusoidal waveform parameter according to actual needs, also can adopt two or more sinusoidal wave methods to improve the mobile mixing effect of molten metal in sinusoidal waveform.
Sine waveform device of the present invention comprises firm banking, sinusoidal waveform container path, cooling device, heater.The sinusoidal waveform container path is welded by being processed into sine-shaped metallic plate or justifying Tofu pudding line metallic plate (metal antiskid plate), and its material can be a common straightcarbon steel, also can be stainless steel or red copper etc.When low overheat metal liquid stream during through this passage, molten metal constantly changes flow direction along the sinusoidal waveform container path, realize from evenly stirring, and circle Tofu pudding line has more increased the mixing effect of metal liquid stream.Diamond plate thickness (the decorative pattern thickness of projection is disregarded) is 4-80mm, and the decorative pattern height is 0.2 times of substrate thickness, and decorative pattern will not allow burr through sand papering.This decorative pattern has also increased mixing effect, prevents the adhesion of molten metal and channel bottom simultaneously.
The sinusoidal waveform container path is fixed on the firm banking, and the height of piece is carved in the adjusting activity as required, and the angle of inclination of setting the sinusoidal waveform container path is the 0-60 degree, to regulate the flowing velocity of metal liquid.The sinusoidal waveform container path can seal, and also can be uncovered.Can add coverture, flux, additive etc., the flow regime that can also observe molten metal when uncovered.Can feed protective gas such as nitrogen, argon gas etc. during sealing.Sinusoidal waveform container path outer wall can be installed cooling device or heater as required or install cooling device and heater simultaneously, and to regulate the temperature of passage, the cooling effect that the metal liquid of flowing through is suitable obtains the microstructure of semisolid that needs.Sinusoidal waveform container path the place ahead inlet connects melting kettle, and rear exit connects and collects container or former, realizes thixotroping moulding or rheoforging as crucible or common casting mold, die casting machine incident chamber etc.
Advantage of the present invention is:
1, metal liquid stream in the flow process, need not additionaling power in the sinusoidal waveform container path.
When 2, metal liquid stream flows, can realize evenly strong stirring certainly along sinusoidal waveform in the sinusoidal waveform container path.
3, in the flow process, if metal liquid stream and channel bottom and sidewall adhesion are serious, then can be made by circle Tofu pudding line metallic plate (metal antiskid plate), can prevent the crust adhesion of metal liquid stream by the sinusoidal waveform container in the sinusoidal waveform container path for metal liquid stream.
4, can the open channels lid; Also can seal, feed protective gas, prevent high-temperature oxydation, particularly the burning during magnesium alloy.
5, metal liquid stream is in the sinusoidal waveform container path in the flow process, can switch cooling device and heater, and the temperature of regulating metal liquid stream.
6, according to actual conditions, the sinusoidal waveform container of the various sizes that designed size is different, being suitable for the various metal trade mark and flow needs.
Description of drawings
Fig. 1 is the apparatus structure schematic diagram of preparation semi-solid metal slurry of the present invention.1 is casting ladle among the figure, the 2nd, molten metal, the 3rd, sinusoidal waveform container path, the 4th, cooling device, the cooling of employing recirculated water, the 5th, semi-solid metal slurry, the 6th, heater adopts the heating of resistance wire electrothermal tube, the 7th, firm banking, the 8th, thermocouple, the 9th, piece is carved in activity, regulates the angle of inclination of sinusoidal waveform container path.
Fig. 2 is the sinusoidal waveform schematic diagram of 3 sinusoidal waveform container paths among Fig. 1.
Fig. 3 is the front view of Fig. 2.
Fig. 4 is the sinusoidal waveform container path schematic diagram of three sine waves.
Fig. 5 is the semi-solid-state metal metallographic structure figure that apparatus of the present invention prepare.
The specific embodiment
In order more to be expressly understood the present invention, be that the present invention is described in further detail for example with the 2Al2 alloy below in conjunction with accompanying drawing.The chemical composition of 2Al2 alloy is: Si---0.50%, and Fe---0.50%, Cu---4.3%, Mn---0.5%, Mg---1.5%, Al---surplus.The liquidus temperature that this alloy is measured in differential thermal analysis is 660 ℃, and solidus temperature is 620 ℃.Technical process is as follows:
(1) tested alloys is heated to 750 ℃ of high temperature melting in coffin, and refining; Then the alloy liquation is cooled to 700 ℃ of pouring temperatures, is incubated 10 minutes, make the temperature and the homogenization of composition of alloy liquation.
(2) cross hot pouring after the alloy liquation reaches technological requirement, it is poured into the inlet container in sinusoidal waveform container path the place ahead, keeping the fall head of inlet container inner metal liquid is 300mm, has certain flow velocity to guarantee the molten metal that enters the sinusoidal waveform container path.
(3) the sinusoidal waveform container path is done by No. 45 steels; include a sinusoidal waveform; cast alloy liquation was opened heater and cooling device preheating sinusoidal waveform container path temperature to 300 ℃ in the past; and make it stable; simultaneously according to the end product quality requirement; decision feeds protective gas Ar gas, and protection alloy liquation is in order to avoid oxidation.
(4) the alloy liquation sinusoidal waveform container path of flowing through, in temperature-fall period while flowing, because the cooling effect of sinusoidal waveform container path bottom and sidewall makes liquid metals produce a large amount of nascent crystalline substances, these nascent crystalline substances of not growing up as yet hightail chamber wall and enter metal liquid stream under molten metal impact subsequently, the metal liquid streams that contain a large amount of nascent nucleus are constantly rolled by sine-shaped constraint in the sinusoidal waveform container path to mix, the nascent nucleus of even metal liquid inside such as temperature concentration is only with spherical growth, and the final outlet alloy liquid stream that obtains at the sinusoidal waveform container path is the semi solid slurry that contains a large amount of globular crystals.In addition by adjusting inclination angle, the waveform quantity of sinusoidal waveform container path, the fall head of inlet container inner metal liquid, and then can control the forming core number of molten metal, finally can influence the refinement of crystal grain and wait an axle effect.
(5) outlet of sinusoidal waveform container path connects a metal mold, and after semi solid slurry flowed into the casting mold moulding, integral body was put into the pond Quench, and sampling is observed its microstructure as shown in Figure 5.Can find out obviously that from figure grain form such as obviously is at the axle shape, trend towards spherically that its result has every reason to believe the alloy semi solid slurry that adopts the present invention to obtain, its mechanicalness will be improved.
Claims (8)
1, a kind of sine waveform device for preparing semi-solid metal slurry, this device comprises firm banking, sinusoidal waveform container path, cooling device, heater.When the low overheat metal liquid stream constantly changes flow direction when this installs, realize from evenly stirring; Simultaneously because the cooling effect of bottom and sidewall makes liquid metals produce a large amount of nascent crystalline substances, these nascent crystalline substances of not growing up as yet hightail chamber wall and enter metal liquid stream under molten metal impact subsequently, finally obtain to contain the semi solid slurry of a large amount of globular crystals in the outlet of sinusoidal waveform container path.
2, the container path of metal liquid stream warp according to claim 1 is shaped as sinusoidal waveform, and size waveforms can be determined according to output, can be a sine wave, also can be the flow channel that two or more sine waves are connected to become metal.
3, sinusoidal waveform container path according to claim 1 prevents that by being processed into sine-shaped metallic plate or circle Tofu pudding line metallic plate (metal antiskid plate) is welded metal liquid stream is in the chamber wall adhesion of crusting.
4, the mobile driving force of molten metal according to claim 1 in the sinusoidal waveform container path mainly relies on self gravitation, and do not have additionaling power.
5, can pass through to adjust inclination angle, the temperature of this passage and the height of the container inner metal liquid that enters the mouth according to claim 1 is described, and then can control the forming core number of molten metal, finally can influence the refinement of crystal grain and wait an effect.
6, sinusoidal waveform container path according to claim 1 can be realized the stable control of temperature by heater and cooling device.
7, sinusoidal waveform container path according to claim 1 can seal, also can be uncovered, and can feed protective gas during sealing and prevent molten metal from being oxidized.
8, flow downward along the sinusoidal waveform vias inner walls according to the described molten metal of claim 1, enter from the passage rear exit and collect container or former, realize thixotroping moulding or rheoforging as crucible or common casting mold, die casting machine injection chamber etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101412643A CN101347833A (en) | 2008-09-03 | 2008-09-03 | Sine waveform device for preparing semi-solid metal slurry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101412643A CN101347833A (en) | 2008-09-03 | 2008-09-03 | Sine waveform device for preparing semi-solid metal slurry |
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| CN101347833A true CN101347833A (en) | 2009-01-21 |
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| CNA2008101412643A Pending CN101347833A (en) | 2008-09-03 | 2008-09-03 | Sine waveform device for preparing semi-solid metal slurry |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341596A (en) * | 2013-07-16 | 2013-10-09 | 北京科技大学 | Shunt converging pouring gate preparation semisolid slurry and rheoforming device |
| CN103962539A (en) * | 2014-03-27 | 2014-08-06 | 慈溪阿尔特新材料有限公司 | Turbulent-flow channel pouring method for preparing semi-solid metal slurry and device special for turbulent-flow channel pouring method for preparing semi-solid metal slurry |
| CN106216617A (en) * | 2016-09-14 | 2016-12-14 | 湖南涉外经济学院 | Metal semi-solid slurry preparation facilities |
| CN107350453A (en) * | 2017-07-05 | 2017-11-17 | 中北大学 | Magnesium alloy casting semi-solid composite extrusion casting molding method |
-
2008
- 2008-09-03 CN CNA2008101412643A patent/CN101347833A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341596A (en) * | 2013-07-16 | 2013-10-09 | 北京科技大学 | Shunt converging pouring gate preparation semisolid slurry and rheoforming device |
| CN103341596B (en) * | 2013-07-16 | 2015-11-11 | 北京科技大学 | A kind of shunting converges running channel and prepares semi solid slurry and rheopectic shaper |
| CN103962539A (en) * | 2014-03-27 | 2014-08-06 | 慈溪阿尔特新材料有限公司 | Turbulent-flow channel pouring method for preparing semi-solid metal slurry and device special for turbulent-flow channel pouring method for preparing semi-solid metal slurry |
| CN106216617A (en) * | 2016-09-14 | 2016-12-14 | 湖南涉外经济学院 | Metal semi-solid slurry preparation facilities |
| CN106216617B (en) * | 2016-09-14 | 2018-04-17 | 湖南涉外经济学院 | Metal semi-solid slurry preparation facilities |
| CN107350453A (en) * | 2017-07-05 | 2017-11-17 | 中北大学 | Magnesium alloy casting semi-solid composite extrusion casting molding method |
| CN107350453B (en) * | 2017-07-05 | 2019-03-05 | 中北大学 | Magnesium alloy casting semi-solid composite extrusion casting molding method |
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Open date: 20090121 |