CN115141945A - Preparation method of aluminum-strontium intermediate alloy coiled material with strontium content of more than 10wt% - Google Patents
Preparation method of aluminum-strontium intermediate alloy coiled material with strontium content of more than 10wt% Download PDFInfo
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- CN115141945A CN115141945A CN202210913666.0A CN202210913666A CN115141945A CN 115141945 A CN115141945 A CN 115141945A CN 202210913666 A CN202210913666 A CN 202210913666A CN 115141945 A CN115141945 A CN 115141945A
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- 239000000463 material Substances 0.000 title claims abstract description 36
- 239000000956 alloy Substances 0.000 title claims abstract description 35
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 34
- YNDGDLJDSBUSEI-UHFFFAOYSA-N aluminum strontium Chemical compound [Al].[Sr] YNDGDLJDSBUSEI-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052712 strontium Inorganic materials 0.000 title claims abstract description 26
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 44
- 229910001278 Sr alloy Inorganic materials 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 19
- 238000005266 casting Methods 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 238000007670 refining Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000005275 alloying Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 230000004048 modification Effects 0.000 abstract description 18
- 238000012986 modification Methods 0.000 abstract description 18
- 239000002245 particle Substances 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 5
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- 238000009776 industrial production Methods 0.000 abstract 1
- 238000011081 inoculation Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 14
- 239000000047 product Substances 0.000 description 10
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- 239000000155 melt Substances 0.000 description 8
- 238000003723 Smelting Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000005496 eutectics Effects 0.000 description 3
- 238000011534 incubation Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910017143 AlSr Inorganic materials 0.000 description 1
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
-
- 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
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
Abstract
The invention provides a preparation method of an aluminum-strontium intermediate alloy coiled material with the strontium content of more than 10wt%, which enables high-concentration aluminum-strontium intermediate alloy Al to be obtained by designing a large-variable extrusion channel and a cavity temperature control system in an extrusion cavity and designing parameters of an extrusion process 4 The size and the mechanical property of Sr particles are greatly improved, the production of the high-concentration aluminum-strontium alloy coiled material which can be added on line is realized, meanwhile, the modification inoculation period is short, the modification recession rate is slow, and the product quality is improved. The obtained Al-Sr intermediate alloy contains Sr (14.0-16.0 wt.%) and Sr (less than 0.20 wt.%) by massSi, < 0.30wt% Fe, and the balance Al. Experimental results show that Al in the aluminum-strontium intermediate alloy provided by the invention 4 The Sr particles are 2-5 μm in average size; the optimal metamorphic effect can be achieved within 5 s; the actual yield is more than 95% under the condition of online addition; compared with the conventional aluminum-strontium alloy, the deterioration rate is low, the 60-minute burning loss rate is less than 20 percent, and the preparation method provided by the invention is simple, easy to control and suitable for large-scale industrial production.
Description
Technical Field
The invention belongs to the field of metal materials, and particularly relates to a preparation method of an aluminum-strontium intermediate alloy coiled material.
Background
In the cast Al-Si alloy, flaky eutectic silicon and coarse primary crystal silicon with complex shape exist, the coarse Si phase seriously cracks a matrix, the strength and the plasticity of the alloy are reduced, and the performance of the alloy is deteriorated. Modification treatment is adopted industrially to change the microstructure morphology of the Si phase, so that the Si phase is uniformly distributed in a matrix in a smaller size, and the comprehensive performance of the alloy is further improved. The strontium has good modification effect, small dosage, long-acting property, remelting property and wide modification temperature range. Generally, al-Sr master alloys are used for modification of hypoeutectic and eutectic aluminum-silicon alloys.
Traditional aluminum-strontium master alloys include ingot, strip, wire and coil products. Wherein the ingot, the casting bar and the wire are generally added in a smelting furnace and an aluminum-turning ladle. Due to the active chemical property of strontium, the phenomenon that the strontium gradually attenuates along with the prolonging of the smelting time can occur after the strontium is added, so that the Sr content in the alloy after the aluminum-strontium intermediate alloy is added cannot be accurately controlled, and the modification effect is unstable; the coiled material product is generally added on line in an aluminum transferring bag or a launder, so that the oxidation attenuation phenomenon of strontium is avoided, but due to the characteristic that the strontium is deteriorated and has a slightly longer incubation period, the deterioration effect is unstable, and the quality of the final product is influenced.
Meanwhile, the mechanical property of the aluminum-strontium alloy is influenced by the strontium content, the traditional processing mode can only produce coiled material products with the strontium content of 10 percent at most, when the strontium content is further improved, the mechanical property of the products can not reach the level of coiling, and meanwhile, the phenomenon of rod breakage can occur during online addition, so that continuous production can not be realized on site.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the preparation method of the aluminum-strontium intermediate alloy coiled material with the strontium content of more than 10wt%, has more excellent mechanical property, and meets the requirements of coiling. The quality change effect is more stable during online addition, and the quality control of products is facilitated.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the invention discloses a first aspect of a preparation method of an aluminum-strontium intermediate alloy coiled material, which comprises the following steps of:
firstly, adding aluminum material with the purity of 99.7-99.95% into an electric furnace to be melted into aluminum liquid, and adding a refining agent to remove gas and refine under the condition that the temperature of the aluminum liquid reaches 700-800 ℃ to prepare the aluminum liquid;
further, the degassing time is preferably 10-15min, and slag removal treatment is carried out after degassing is finished.
Secondly, adding metal strontium into the aluminum liquid at 700-1300 ℃, keeping the temperature of the aluminum liquid at 700-1300 ℃, and alloying for 30-60 minutes to prepare aluminum-strontium alloy liquid, wherein the mass ratio of aluminum to strontium is 84-86;
preferably, the metal strontium is added by using a feeder at 700 to 1100 ℃, further, the feeding time is set to 5 to 30min, and the electromagnetic stirring voltage during the feeding is set to 200 to 400v. Preferably, the melt temperature is adjusted to 800-1200 ℃ after the feeding is finished, the alloying is carried out for 30-60 minutes, and the electromagnetic stirring voltage is adjusted to 200v during the alloying period. Further, adjusting the temperature of the melt to 700-1200 ℃ for the second degassing refining operation, and cleaning the scum on the surface after the degassing refining operation is finished.
Thirdly, casting the aluminum-strontium alloy liquid at 700-1300 ℃ to prepare a plate;
preferably, the temperature of the melt is adjusted to 700-1000 ℃ for casting, and the rotating speed of a casting machine is 2-5r/min, so that the alloy liquid is rapidly solidified.
And fourthly, forming the plate into a wire through the extruding machine, installing the cavity of the extruding machine into the extruding machine in advance, and opening the extruding machine to idle. The temperature of the cast strip is controlled between 350 and 450 ℃ by controlling the water spray of the crystallization wheel. After the extrusion is started, the cooling water of the extrusion cavity is started, and the extrusion temperature is controlled to be 350-450 ℃.
Furthermore, in order to increase the deformation amount of the metal fluid in the extrusion process, the shearing force of the cavity to the metal fluid in the extrusion process is increased, and a more excellent particle crushing effect is achieved. The invention improves the structure of the extrusion cavity of the extruder, designs the large variable extrusion channel, and increases the proportion of the cavity sectional area to the extrusion outlet sectional area to 8-10, wherein the proportion range greatly increases the shearing stress at the outlet compared with the original extrusion cavity, and ensures that the metal fluid can be normally extruded under the state that the extrusion wheel keeps the maximum extrusion force, and the abrasion of the workpiece does not obviously deteriorate. The deformation quantity in the extrusion process is larger, and the extrusion crushing effect is better.
And the shunting deformation area at the front end of the extrusion cavity is designed into a porous mode, the number of the shunting deformation areas is 2-9, the size of the shunting deformation areas is 5mm-10mm, and each hole can be rectangular, circular, trapezoidal or triangular.
The rear end shunting area of the extrusion cavity is designed to be rectangular, circular, trapezoidal or triangular. The front end of the extrusion cavity is provided with 2-9 holes, the rear end of the extrusion cavity is welded with materials crushed from the 2-9 holes at the front end, the shapes of the materials can be the same, and the ratio of the cross sectional area to the cross sectional area of the plate is 1:1.1-1.2. If the ratio is less than 1.1, for example, 1.
If the ratio is larger than 1.2, such as 1.4, the feeding amount is too much, the subsequent extrusion is not performed, and the front end material is prevented from entering, so that the equipment cannot normally operate.
And a water-cooling channel is added in the extrusion cavity, and the cross section area of the water-cooling channel is 25-35% of the area of the cavity. The water cooling channel is added to mainly reduce the temperature of the metal fluid, the extrusion process is to physically crush a second phase structure (Al 4Sr phase) in the product, the yield limit of Al4Sr particles is reduced along with the increase of the temperature, and the shearing force applied during deformation is reduced, so that the phenomenon of no fracture or incomplete fracture exists during deformation, the size of the second phase particles of the final product is increased, and the mechanical property is simultaneously deteriorated.
On the other hand, the extrusion process is carried out at high temperature, and enough pressure needs to be ensured to extrude the metal, so that the stress of the cavity is large, if the water-cooling channel occupies too large proportion, the bearing capacity of the cavity is reduced, and the service life is shortened or the normal use cannot be realized.
And fifthly, winding the wire into a coiled material through a winding machine.
The second aspect of the invention discloses an aluminum-strontium intermediate alloy coiled material product prepared by the preparation method. Comprises 14.0-16.0wt% of Sr, less than 0.20 wt% of Si, less than 0.30wt% of Fe and the balance of Al by mass. The second phase in the Al-Sr intermediate alloy is distributed and dispersed, and the average size is less than 5 μm. The mechanical property of the material is more excellent, and the requirement of winding is met.
The invention has the advantages and positive effects that:
1. the aluminum-strontium intermediate alloy coiled material prepared by the method has short modification incubation period, and the time for achieving the optimal modification effect is within 5 s. The aluminum-strontium intermediate alloy can realize the purpose of online addition, has more stable quality change effect during online addition, is beneficial to the quality control of products, and meets the production requirements of aluminum alloys with excellent performance, particularly special aluminum alloy materials for aerospace, military industry and the like.
2. The aluminum-strontium intermediate alloy coiled material prepared by the method has high strontium content, can effectively reduce the usage amount and reduce the use cost.
3. The second phase particles of the aluminum-strontium intermediate alloy coiled material prepared by the method are more uniform and fine, and the average size of the particles is less than 5um. The real yield of the on-line addition is more than 95 percent. The deterioration rate is low, and the burning loss rate is less than 20 percent in 60 minutes.
Drawings
FIG. 1 is a schematic view of an extrusion chamber configuration of an extruder according to an embodiment of the disclosure;
FIG. 2 is a microstructure diagram of an AlSr10 coil produced in comparative example 1;
FIG. 3 is a microstructure diagram of an AlSr15 wire produced in comparative example 1;
FIG. 4 is a microstructure diagram of AlSr15 coils produced in example 1 of the present invention;
FIG. 5 is a graph showing the modification effect of AlSr15,5s produced in comparative example 1;
FIG. 6 is a graph showing the modification effect of AlSr155s produced in accordance with example 1 of the present invention;
FIG. 7 is a comparison of the actual yields of AlSr15 produced in comparative example 1 and AlSr15 produced in example 1 according to the present invention;
fig. 8 is a graph comparing the elongation of AlSr15 produced in example 1 of the present invention with that of AlSr15 produced in comparative example 1;
FIG. 9 is a graph showing the continuous 10-heat Sr element yield in the AlSr15 on-line feeding mode produced in example 1 of the present invention.
Reference numbers in the figures:
1 is an extrusion cavity, 2 is a cold water channel, 3 is a porous die, 4 is a welding area, 5 is a cavity cover, and 6 is a single-hole die.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The invention relates to an aluminum-strontium intermediate alloy production system which comprises smelting equipment, a launder, a casting machine and an extruder. The smelting equipment is an induction furnace or a resistance furnace, and an electromagnetic stirring device is arranged at the bottom of the electric furnace. The upper part of the chute is covered with a heat-resistant plate, the lower part of the chute is provided with an electromagnetic heating device, and the connecting part of the chute and the casting machine is provided with a melt flow control device. The material of the casting machine crystallization wheel is red copper, and the cross section of the groove is in a wide plate belt shape.
The invention designs a cavity structure of an extruder, and as shown in figure 1, a porous die 3 is adopted in a front-end shunting deformation area of an extrusion cavity 1 of the extruder, so that the deformation in the extrusion process is increased, and the size of a second phase is physically refined.
The outlet end of the rear end welding area 4 of the extrusion cavity 1 of the extruder adopts a single-hole die 6, the function of alloy welding is realized on the basis of increasing the deformation in the extrusion process, the size of the second phase is physically refined, and the compactness of the blank is increased.
In addition, a multi-pass water cooling channel 2 is arranged in an extrusion cavity of the extruder to take away redundant heat generated in the deformation process, so that the function of extrusion deformation at low temperature is realized.
The production process of the aluminum-strontium master alloy coiled material is further illustrated by the following embodiments.
Example 1
A method for preparing an aluminum-strontium intermediate alloy coiled material with the strontium content of more than 10wt% comprises the following steps:
firstly, putting an aluminum ingot with the purity of 99.7-99.95% into smelting equipment for melting, adjusting the temperature of aluminum liquid to 750 ℃ for degassing and refining, wherein the degassing time is 15min, and performing slag removal treatment after degassing.
And secondly, adding metal strontium by using a feeder at 750 ℃, setting the adding time to be 5min, and setting the electromagnetic stirring voltage to be 300v in the adding process. The mass ratio of aluminum to strontium was 85.
And thirdly, adjusting the temperature of the melt to 1200 ℃ after the feeding is finished, alloying for 20 minutes, and adjusting the electromagnetic stirring voltage to 200v during the alloying period.
And fourthly, adjusting the temperature of the melt to 1200 ℃ to carry out degassing refining operation, and cleaning the scum on the surface after the degassing refining is finished.
Step five, casting, namely adjusting the temperature of the melt to 950 ℃ for casting, wherein the rotating speed of a casting machine is 4r/min, so that the alloy liquid is rapidly solidified and cast into a platy blank, and the size of the plate is the long edge: 10mm, 5mm wide side and round-cornered rectangle shape. The temperature of the cast strip is between 350 and 450 ℃ through controlling the spray water of the crystallization wheel.
And sixthly, extruding, namely installing an extrusion cavity into the extruder in advance, and starting the extruder to idle. A9-hole die is adopted in a shunting deformation area at the front end of the extrusion cavity, and each hole is rectangular and is 5mm by 5mm in size. The single-hole die at the rear end of the extrusion cavity is designed into a rectangular hole, and the ratio of the cross section area to the cross section area of the plate is 1:1.1. starting cooling water of extrusion cavity after extrusion, controlling extrusion temperature at 350-450 deg.C (extrusion temperature is unstable, and can be in the range), water cooling channel cross-sectional area in extrusion cavity is 25% of cavity area, and cooling water flow is 0.6m 3 And h, the temperature of the blank is ensured to be consistent in the physical deformation process, so that the toughness of the second phase structure is kept consistent, and the crushing effect is optimal in the deformation process.
As shown in FIG. 4, which is a microstructure diagram of the AlSr15 coiled material produced by the process, it can be seen that the second phase particles of the microstructure are distributed in a fine and uniform manner, and the average size can reach below 5 μm.
As shown in FIG. 6, in order to obtain the modification effect of AlSr155S produced by the process, it can be seen that the modification effect is optimal when AlSr155S is added to AlSi7, and the modification incubation period is extremely short.
The change curve of the actual yield of AlSr15 produced by the process along with time is shown in FIG. 7, and it can be seen from the graph that when the modification time is 60min, the actual yield of Sr element of AlSr15 produced by the process is still more than 85%, and the actual yield is obviously improved compared with the actual yield of less than 40% of the traditional AlSr 15.
When the addition was performed by the on-line addition method, the calculation result of the actual yield of Sr element in the continuous 10-heat product is shown in fig. 9, and it is understood that when the addition of AlSr15 produced by the present process was performed by the on-line addition method, the actual yield of Sr element was 95% or more.
The toughness of the AlSr15 coiled material produced by the process better meets the coiling requirement, the sampling is carried out in the front, middle and later periods of the production process, the elongation is detected, and the detection result is shown in figure 8: the elongation of the AlSr15 coiled material produced by the process is about 9 percent, the coiling requirement is met, and the elongation of the traditional AlSr15 is less than 7 percent, and the coiling requirement cannot be met.
Example 2
The difference from example 1 is: each hole at the front end of the extrusion cavity is circular in shape and has the size of d =5mm.
The AlSr15 coiled material produced by the process has the following main indexes:
| index (es) | Average size of particles | Sr content | Elongation percentage | Modified actual yield (60 min) | On-line addition yield |
| Data of | 3μm | 14.8wt.％ | 8.5％ | 84.5％ | 97.3％ |
Example 3
Different from the embodiment 2, the ratio of the cross-sectional area of the single hole at the rear end of the extrusion cavity to the cross-sectional area of the plate is 1:1.2.
the AlSr15 coiled material produced by the process has the following main indexes:
| index (I) | Average size of particles | Sr content | Elongation percentage | Modified actual yield (60 min) | On-line addition yield |
| Data of | 3.4μm | 15.2wt.％ | 8.1％ | 82.8％ | 95.3％ |
Example 4
Unlike example 3, the extrusion cavity rear end single hole die was designed as a triangular hole.
The AlSr15 coiled material produced by the process has the following main indexes:
| index (I) | Average size of particles | Sr content | Elongation percentage | Modified actual yield (60 min) | On-line addition yield |
| Data of | 2.8μm | 15.1wt.％ | 8.2％ | 83.4％ | 95.7％ |
Comparative example 1
The difference from example 1 is that: the traditional process is adopted, cooling water is not needed in the extrusion process, and the extrusion temperature is over 500 ℃. The extruded wire is rolled and cut into products.
As shown in FIG. 2, the microstructure of AlSr10 coil prepared by the method of comparative example 1 is shown, and Al in the microstructure can be seen 4 The average size of Sr particles is about 30-50 μm. The particle size is large.
As shown in FIG. 3, the microstructure of the AlSr15 wire rod prepared by the method of comparative example 1 is shown, and Al in the microstructure can be seen 4 The average size of the Sr particles is about 100 to 150 μm. The particle size is large.
As shown in fig. 5, the modification effect of AlSr15,5s produced by the method of comparative example 1 is shown, and it can be seen from the figure that eutectic silicon in the AlSi alloy is not completely modified, at a level of 4 or 5.
The actual yield of the AlSr15 produced by the method of the comparative example 1 is shown in the graph of FIG. 7, and the graph shows that the decay rate of Sr element is very fast after the AlSr15 produced by the method of the comparative example 1 is added into aluminum liquid, and the actual yield is only about 45 percent after 60 min.
Comparative example 2
In contrast to example 1, the electromagnetic stirring voltage during the second addition was set at 150v.
The AlSr15 coiled material produced by the process has the following main indexes:
| index (I) | Average size of particles | Sr content | Elongation percentage | Modified actual yield (60 min) | On-line addition actual yield |
| Data of | 80μm | 13.5wt.％ | 6.8％ | 68.1％ | 92.1％ |
Comparative example 3
In a difference from example 1, in the fifth step, casting, the melt temperature was adjusted to 1050 ℃.
The AlSr15 coiled material produced by the process has the following main indexes:
| index (I) | Average size of particles | Sr content | Elongation percentage | Modified actual yield (60 min) | On-line addition yield |
| Data of | 70μm | 14.7wt.％ | 6.4％ | 62.1％ | 90.6％ |
Comparative example 4
Different from the embodiment 1, a single-hole die is adopted in the shunting deformation area at the front end of the extrusion cavity.
The AlSr15 coiled material produced by the process has the following main indexes:
| index (I) | Average size of particles | Sr content | Elongation percentage | Modified actual yield (60 min) | On-line addition actual yield |
| Data of | 90μm | 15.2wt.％ | 6.3％ | 60.1％ | 88.9％ |
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept, and these changes and modifications are all within the scope of the present invention.
Claims (7)
1. A method for preparing an aluminum-strontium intermediate alloy coiled material with the strontium content of more than 10wt% comprises the following steps:
firstly, adding aluminum material with the purity of 99.7-99.95% into an electric furnace to be melted into aluminum liquid, and adding a refining agent under the condition that the temperature of the aluminum liquid reaches 700-800 ℃ to prepare the aluminum liquid;
secondly, adding metal strontium into the aluminum liquid at 700-1300 ℃, keeping the temperature of the aluminum liquid at 700-1300 ℃, and alloying for 30-60 minutes to prepare aluminum-strontium alloy liquid, wherein the mass ratio of aluminum to strontium is 84-86;
thirdly, casting the aluminum-strontium alloy liquid at 700-1300 ℃ to prepare a plate;
fourthly, forming the plate into a wire by an extruder, and controlling the extrusion temperature to be 350-450 ℃;
fifthly, coiling the wire into a coiled material through a coiler;
the front end shunting deformation area of the extrusion cavity of the extruder is designed into a porous mode, the number of the shunting deformation areas is 2-9, the aperture is 5mm-10mm, and the ratio of the cavity sectional area to the extrusion outlet sectional area is 8-10;
the ratio of the cross-sectional area of the rear end of the extrusion cavity to the cross-sectional area of the plate is 1:1.1-1.2;
a water-cooling channel is arranged in the extrusion cavity, and the cross-sectional area of the water-cooling channel is 25-35% of the area of the cavity.
2. The method according to claim 1, wherein the charging time of the strontium metal of step two is 5-30min, and the voltage of the electromagnetic stirring during the charging process is set to 200-400v.
3. The preparation method according to claim 1, wherein the temperature of the aluminum-strontium alloy liquid in the third step is adjusted to 700-1000 ℃ for casting, and the rotating speed of a casting machine is 2-5r/min.
4. The method for preparing the composite material of claim 1, wherein the shape of the front end hole of the extrusion cavity is rectangular, circular, trapezoidal or triangular.
5. The method of claim 4, wherein the shape of the extrusion chamber rear end orifice is the same as or different from the shape of the extrusion chamber front end orifice.
6. The method of claim 1, wherein the cooling water flow rate is 0.5-0.7m 3 /h。
7. An aluminum-strontium intermediate alloy coiled material with the strontium content of more than 10wt% prepared by the preparation method of any one of claims 1 to 6, wherein the aluminum-strontium intermediate alloy comprises 14.0 to 16.0 mass percent of Sr, 0.01 to 0.3 mass percent of Fe, 0.01 to 0.3 mass percent of Si, less than 0.15 mass percent of impurities and the balance of Al, the second phase in the aluminum-strontium intermediate alloy is dispersed and distributed, the average size is less than 2 to 5 mu m, and the elongation of the aluminum-strontium intermediate alloy coiled material is 8 to 9.5 percent.
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO902193D0 (en) * | 1989-05-19 | 1990-05-16 | Shell Int Research | PROCEDURE FOR THE PREPARATION OF AN ALUMINUM / STRONTRIUM ALLOY. |
| CN1322854A (en) * | 2001-05-10 | 2001-11-21 | 山东大学 | Intermediate Al-Sr alloy and its prepn |
| CN101240381A (en) * | 2007-02-09 | 2008-08-13 | 江苏凯特汽车部件有限公司 | Composite thinning for aluminum alloy units of low-pressure casting automobile wheel |
| CN101352806A (en) * | 2008-09-05 | 2009-01-28 | 湖南金联星冶金材料技术有限公司 | Method for producing aluminum strontium alloy wire rod with high content of strontium and without deterioration latency stage |
| CN103740958A (en) * | 2014-01-09 | 2014-04-23 | 佛山市深达美特种铝合金有限公司 | 4032 aluminum alloy and modification method thereof |
| CN105154697A (en) * | 2015-09-29 | 2015-12-16 | 河北四通新型金属材料股份有限公司 | Production system of intermediate alloy wires and production technology of intermediate alloy wires |
| CN105925825A (en) * | 2016-05-23 | 2016-09-07 | 沈阳工业大学 | Preparation method for high-tenacity efficient Al-Sr intermediate alloy alterant |
| CN106148769A (en) * | 2016-07-26 | 2016-11-23 | 西安科技大学 | A kind of Al-Sr serial alloy bar and preparation technology thereof |
| CN106636697A (en) * | 2016-12-09 | 2017-05-10 | 重庆固鼎合金材料有限公司 | Aluminum strontium alloy production process |
| CN109112366A (en) * | 2018-10-29 | 2019-01-01 | 长春工业大学 | A kind of processing method of aluminum-silicon alloy alterative |
| CN109266885A (en) * | 2018-10-17 | 2019-01-25 | 中国科学院青海盐湖研究所 | One kind is containing 6063 aluminium alloy of strontium and preparation method thereof |
| CN109772922A (en) * | 2019-03-12 | 2019-05-21 | 广东省材料与加工研究所 | A kind of crowded upsetting mold squeezes upsetting processing method and magnesium alloy center collet |
| CN111004935A (en) * | 2019-12-23 | 2020-04-14 | 河北四通新型金属材料股份有限公司 | Preparation method of high-purity aluminum-strontium intermediate alloy wire |
| CN111363939A (en) * | 2020-03-27 | 2020-07-03 | 山东滨州华创金属有限公司 | Preparation process of aluminum-strontium intermediate alloy wire rod |
| CN211660772U (en) * | 2019-12-31 | 2020-10-13 | 徐州市新东电电工机械有限公司 | Continuous casting and continuous extrusion production line for aluminum-strontium alloy rods |
-
2022
- 2022-08-01 CN CN202210913666.0A patent/CN115141945B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO902193D0 (en) * | 1989-05-19 | 1990-05-16 | Shell Int Research | PROCEDURE FOR THE PREPARATION OF AN ALUMINUM / STRONTRIUM ALLOY. |
| CN1322854A (en) * | 2001-05-10 | 2001-11-21 | 山东大学 | Intermediate Al-Sr alloy and its prepn |
| CN101240381A (en) * | 2007-02-09 | 2008-08-13 | 江苏凯特汽车部件有限公司 | Composite thinning for aluminum alloy units of low-pressure casting automobile wheel |
| CN101352806A (en) * | 2008-09-05 | 2009-01-28 | 湖南金联星冶金材料技术有限公司 | Method for producing aluminum strontium alloy wire rod with high content of strontium and without deterioration latency stage |
| CN103740958A (en) * | 2014-01-09 | 2014-04-23 | 佛山市深达美特种铝合金有限公司 | 4032 aluminum alloy and modification method thereof |
| CN105154697A (en) * | 2015-09-29 | 2015-12-16 | 河北四通新型金属材料股份有限公司 | Production system of intermediate alloy wires and production technology of intermediate alloy wires |
| CN105925825A (en) * | 2016-05-23 | 2016-09-07 | 沈阳工业大学 | Preparation method for high-tenacity efficient Al-Sr intermediate alloy alterant |
| CN106148769A (en) * | 2016-07-26 | 2016-11-23 | 西安科技大学 | A kind of Al-Sr serial alloy bar and preparation technology thereof |
| CN106636697A (en) * | 2016-12-09 | 2017-05-10 | 重庆固鼎合金材料有限公司 | Aluminum strontium alloy production process |
| CN109266885A (en) * | 2018-10-17 | 2019-01-25 | 中国科学院青海盐湖研究所 | One kind is containing 6063 aluminium alloy of strontium and preparation method thereof |
| CN109112366A (en) * | 2018-10-29 | 2019-01-01 | 长春工业大学 | A kind of processing method of aluminum-silicon alloy alterative |
| CN109772922A (en) * | 2019-03-12 | 2019-05-21 | 广东省材料与加工研究所 | A kind of crowded upsetting mold squeezes upsetting processing method and magnesium alloy center collet |
| CN111004935A (en) * | 2019-12-23 | 2020-04-14 | 河北四通新型金属材料股份有限公司 | Preparation method of high-purity aluminum-strontium intermediate alloy wire |
| CN211660772U (en) * | 2019-12-31 | 2020-10-13 | 徐州市新东电电工机械有限公司 | Continuous casting and continuous extrusion production line for aluminum-strontium alloy rods |
| CN111363939A (en) * | 2020-03-27 | 2020-07-03 | 山东滨州华创金属有限公司 | Preparation process of aluminum-strontium intermediate alloy wire rod |
Non-Patent Citations (2)
| Title |
|---|
| 侯俊波: "锶变质在消失模铝合金铸造生产中的应用", 《中国铸造装备与技术》, no. 4, pages 73 - 75 * |
| 毕胜: "铝锶中间合金连续挤压过程中的组织演变（英文）", 《TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA》, vol. 27, no. 2, pages 305 - 311 * |
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