KR20160006320A - Magnesium alloy plate and the manufacturing method thereof - Google Patents
Magnesium alloy plate and the manufacturing method thereof Download PDFInfo
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- KR20160006320A KR20160006320A KR1020140085245A KR20140085245A KR20160006320A KR 20160006320 A KR20160006320 A KR 20160006320A KR 1020140085245 A KR1020140085245 A KR 1020140085245A KR 20140085245 A KR20140085245 A KR 20140085245A KR 20160006320 A KR20160006320 A KR 20160006320A
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- magnesium alloy
- rolled material
- alloy sheet
- rolling
- manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
Abstract
The present invention relates to a magnesium alloy rolled material and a method of manufacturing the same, comprising the steps of: preparing a molten magnesium alloy; Casting the molten metal into a magnesium alloy sheet by feeding it to a twin roll casting machine; Subjecting the magnesium alloy sheet to a solution treatment; And a step of rolling the solution-treated magnesium alloy sheet material to produce a magnesium alloy rolled material, wherein the step of rolling the magnesium alloy sheet material subjected to the solution treatment is performed a plurality of times, and in the rolling step, And an intermediate annealing step of heating the rolled material to a temperature of 300 ° C or more. In the intermediate annealing step, the precipitation phase in the rolled material can be controlled to improve strength and corrosion resistance.
Description
The present invention relates to a magnesium alloy rolled material and a manufacturing method thereof, and more particularly, to a magnesium alloy rolled material capable of improving corrosion resistance of a magnesium alloy rolled material and a method of manufacturing the same.
Magnesium is an environmentally friendly material that is excellent in electromagnetic wave shielding, dustproofing, dimensional stability, cutting workability and the like. This magnesium is processed mainly by die casting and extrusion because it is difficult to roll at room temperature. However, in recent years, as the technology for rolling magnesium has been secured, production has been facilitated and the utilization site has also been increasing. Particularly, according to the energy saving policy, studies of magnesium alloy sheet as a means of lightening automobile, aviation and ship are actively underway. However, the magnesium alloy has a serious problem that it is easily corroded by moisture or salt due to its weak corrosion resistance.
Accordingly, in order to improve the corrosion resistance of magnesium, a technique of treating a magnesium surface by a method such as a chromate treatment method, a chemical treatment method, an anodizing method, a plasma electric oxidation method (PEO) or the like has been applied. However, there is a problem that the chemical treatment technique is difficult in the process and deteriorates the quality of magnesium, and the anodic oxidation method widely used for the formation of the aluminum oxide film has a problem that when the oxide film is formed on the magnesium surface, the density is decreased and the pore is generated. In order to solve these problems, recently, a technique of plasma electrolyte oxidation which forms a dense oxide film by generating a plasma by applying a high voltage to the surface of magnesium has been proposed. However, since the plasma electrolyte oxidation method requires high voltage, But it is difficult to form a uniform oxide film, thereby causing corrosion in the oxide film.
Recently, a method of improving corrosion resistance by adding aluminum (Al) to a magnesium molten metal has been studied. At this time, the higher the aluminum content, the better the corrosion resistance of the magnesium alloy. Aluminum produces a large amount of precipitate phase during the process of casting and rolling the magnesium alloy, thereby lowering the rolling property. There is a problem that corrosion resistance is deteriorated.
The present invention provides a magnesium alloy rolled material capable of improving corrosion resistance and a method of manufacturing the same.
The present invention provides a magnesium alloy rolled material capable of improving the quality of a product and a method of manufacturing the same.
A method of manufacturing a magnesium alloy rolled material according to an embodiment of the present invention includes the steps of: preparing a molten magnesium alloy; Casting the molten metal into a magnesium alloy sheet by feeding it to a twin roll casting machine; Subjecting the magnesium alloy sheet to a solution treatment; And a step of rolling the solution-treated magnesium alloy sheet material to produce a magnesium alloy rolled material, wherein the step of rolling the magnesium alloy sheet material subjected to the solution treatment is performed a plurality of times, and in the rolling step, And an intermediate annealing step of heating the rolled material to a temperature of 300 캜 or more.
In the process of preparing the molten magnesium alloy, 8 to 10% by weight of aluminum may be included in the total weight of the molten magnesium alloy.
In the course of casting the magnesium alloy sheet material, the magnesium alloy sheet material may be cast to a thickness of 4 to 6 mm.
During the solution treatment, the magnesium alloy sheet can be maintained at a temperature of 350 ° C or higher for 48 hours or more.
And cooling the magnesium alloy sheet material subjected to the solution treatment to 100 to 200 ° C at a rate of 10 to 50 ° C / minute after the solution treatment process.
The magnesium alloy sheet material may be maintained at a temperature of 250 to 350 ° C in the course of manufacturing the magnesium alloy rolled material.
The process for producing the magnesium alloy rolled material may include multipass rolling in which the magnesium alloy sheet material is rolled a plurality of times.
In the course of manufacturing the magnesium alloy rolled material, the intermediate annealing process may be performed every 2 to 3 passes.
The intermediate annealing may be performed for 30 minutes to 90 minutes.
In the course of manufacturing the magnesium alloy rolled material, the rolled material may be manufactured to have a thickness of 0.2 to 4 mm.
The magnesium alloy sheet according to the embodiment of the present invention is manufactured using a magnesium alloy melt containing 8 to 10 wt% of aluminum and has a grain size of 10 to 20 mu m.
The magnesium alloy rolled material may have a weight loss rate of 0.1 to 0.5 mg / cm 2 · day in a solution containing NaCl.
A magnesium alloy rolled material and a method of manufacturing the same according to the embodiment of the present invention are characterized in that an intermediate annealing process is performed to heat the rolled material at a high temperature of 300 ° C or higher in the course of rolling a magnesium alloy sheet material to produce a rolled material, The existing precipitate phase can be removed by re-use. Therefore, the rolling property of the magnesium alloy can be improved, and deterioration of the corrosion resistance due to the precipitation phase can be suppressed. By such a process, the grain size of the magnesium alloy rolled material is increased compared to the grain size of the magnesium alloy rolled material produced by the conventional technique, thereby improving the corrosion resistance of the magnesium alloy rolled material.
1 is a flowchart showing a method of manufacturing a magnesium alloy rolled material according to an embodiment of the present invention.
2 is a view showing a temperature change in the process of manufacturing a magnesium alloy rolled material according to an embodiment of the present invention.
3 is a view schematically showing an apparatus for manufacturing a magnesium alloy rolled material according to an embodiment of the present invention.
4 is a photograph showing a state of crystal grains of a rolled material manufactured by a method for manufacturing a magnesium alloy rolled material according to an embodiment of the present invention and a magnesium alloy rolled material produced by a conventional method.
FIG. 5 is a graph showing a result of an experiment in which a weight loss rate is measured using a rolled material manufactured by a method of manufacturing a magnesium alloy rolled material according to an embodiment of the present invention and a magnesium alloy rolled material manufactured by a conventional method.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know.
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a flow chart showing a method of manufacturing a magnesium alloy rolled material according to an embodiment of the present invention, FIG. 2 is a view showing a temperature change in a process of manufacturing a magnesium alloy rolled material according to an embodiment of the present invention, Is a schematic view of an apparatus for manufacturing a magnesium alloy rolled material according to an embodiment of the present invention.
First, the magnesium alloy rolled material according to an embodiment of the present invention includes magnesium as the main raw material, aluminum (Al) in an amount of 8 to 10 wt%, and other unavoidable impurities. In addition, the magnesium alloy rolled material can be made to have a thickness of 0.2 to 4 mm, has a grain size of 10 to 20 μm, and has a weight loss rate of 0.1 to 0.5 mg / cm 2 · day. The magnesium alloy rolled material according to the embodiment of the present invention has a larger grain size than that of the magnesium alloy rolled material manufactured by the prior art, and thus can achieve excellent corrosion resistance.
Hereinafter, a method of manufacturing the above-described magnesium alloy rolled material will be described.
Referring to FIG. 1, a method of manufacturing a magnesium alloy rolled material according to an embodiment of the present invention includes a step (S110) of preparing a magnesium alloy melt, a step of casting a magnesium alloy melt into a magnesium alloy sheet by feeding the melt into a twin roll casting machine A step S140 of solubilizing the cast magnesium alloy plate material S130 and a step S140 of rolling the magnesium alloy plate material subjected to solution treatment to produce a magnesium alloy rolled material S140, (S144) of intermediate annealing the rolled material at a temperature of 300 DEG C or higher in the step of making the rolled material (S142). At this time, rolling can be performed multiple times by multipass, and intermediate annealing can be performed every 2 to 3 passes.
The magnesium alloy melt is produced by adding 8 to 10% by weight of aluminum (Al) to the total weight of the magnesium alloy melt in the process of melting the magnesium. The magnesium alloy melt thus prepared contains magnesium as its main raw material and contains aluminum and other unavoidable impurities. The aluminum contained in the magnesium alloy molten metal can improve the corrosion resistance of magnesium. At this time, the larger the content of aluminum is, the more the corrosion resistance of magnesium is improved. However, aluminum contains a large amount of precipitated phase together with magnesium when it contains an excessively large amount.
When the magnesium alloy molten metal is thus prepared, the magnesium alloy molten metal is supplied to the twin roll type casting machine shown in Fig. 3 to cast the magnesium alloy sheet material. The twin roll type casting machine includes a
The magnesium alloy melt is injected into a pair of
When the magnesium alloy sheet material is cast, the solution treatment of the magnesium alloy sheet material is performed as a pretreatment step for rolling the magnesium alloy sheet material. The solution treatment is a process for removing segregation occurring in the plate material during the casting of the plate material by heating the magnesium alloy plate material in a heating furnace, and homogenizing the segregation. Referring to FIG. 2, the solution treatment is performed by maintaining the temperature of the magnesium alloy sheet at 350 ° C. or higher, for example, 350 ° C. to 450 ° C. for a predetermined time, eg, 48 hours or more. By performing the solution treatment process, the center segregation can be removed by dispersing the solute which is located at a predetermined position, for example, the center of the magnesium alloy sheet material. As the solution treatment time becomes longer, the precipitation phase generated inside the plate material can be more solidly removed by solidification, and thus the rolling property can be improved.
When the solution treatment of the magnesium alloy sheet material is completed, the high-temperature magnesium sheet material subjected to the solution treatment is cooled. At this time, cooling of the magnesium alloy sheet material can be performed immediately after the solution treatment process, and can be cooled to 100 to 200 ° C at a rate of 10 to 50 ° C per minute.
Edge trimmings may be performed after cooling the magnesium alloy sheet. The edge trimming operation is performed within 30 minutes, so that the temperature of the plate material after the edge trimming is maintained at 100 DEG C or less. This is to suppress the generation of a discontinuous precipitate phase inside the plate material.
Next, the solution-treated magnesium alloy sheet material is rolled and made into a rolled material such as a coil. Rolling may be performed by multipass until the thickness of the rolled material becomes the desired thickness. Referring to FIG. 2, the rolling process is performed such that the temperature of the solution-treated magnesium alloy sheet or rolled material is maintained at a temperature of about 250 to 350 ° C. At this time, when the temperature of the solution-treated magnesium alloy sheet material or the rolled material is lower than the suggested range, there is a problem that the shear band is developed due to the concentration of stress concentrated in the solution-treated magnesium alloy sheet or rolled material. In addition, when the temperature of the solution-treated magnesium alloy sheet material or the rolled material is higher than the recommended temperature range, the size of the precipitated phase and the crystal grain excessively increases.
A rolling reduction of 5 to 15% can be applied in rolling from the initial thickness of the solution-treated magnesium alloy sheet in the rolling process to the target thickness, for example, 0.2 to 4 mm. At this time, the reduction rate can be differently applied depending on the thickness of the rolled material in the course of multi-pass rolling. For example, as the thickness of the rolled material is decreased, the reduction rate is reduced so that occurrence of surface cracks in the rolled material can be suppressed .
In this way, during the rolling process, the intermediate annealing process in which the rolled material is placed in a separate heat treatment furnace for a predetermined time can be performed. Since the physical properties of the magnesium alloy deteriorate the rolling property, the residual stress can be eliminated through the intermediate annealing process to improve the rolling property. Particularly, in the case of a magnesium alloy rolled material containing a large amount of aluminum, a large amount of precipitation phase is formed in the rolled material because it rapidly precipitates at a temperature not higher than a predetermined temperature, for example, 300 ° C or lower. Therefore, It is good to proceed with the process. In addition, since warm rolling itself is an operation of applying heat, generation of an intermetallic compound is actively generated, and therefore, a heat treatment at a high temperature of 300 ° C or more is required to suppress it. That is, by performing the intermediate annealing process during the rolling process, the precipitation phase generated in the rolling process can be reused and the precipitation phase can be removed to improve the rolling property. In the rolled material finally obtained by the intermediate annealing process, less than 10% of the intermetallic compound remains in the material. The size of the crystal grains is about 10 to 20 mu m. The magnesium alloy rolled material according to the embodiment of the present invention has a larger grain size than a general magnesium alloy rolled material having a grain size of 10 mu m or less but can maximize solubility enhancement by reusing the precipitation phase in the material by the intermediate annealing process There is an advantage that the strength can be improved.
The rolling pass may be performed continuously, and the intermediate annealing process may be performed every 2 to 3 passes. For example, in the case of performing the intermediate annealing step for each two passes, the two passes are continuously performed, and the intermediate annealing step can be performed after the two passes of rolling are completed.
The intermediate annealing step may be performed by maintaining the rolled material in a separate heat treatment furnace at a temperature of 300 ° C or higher, for example, 300-500 ° C for 30 minutes to 90 minutes. In this case, when the temperature and time of the intermediate annealing process are shorter than the suggested ranges, the effect of reusing the precipitate phase is insignificant. If the temperature and time are longer than the suggested range, the effect of reusing the precipitate phase is limited and the productivity is lowered.
The magnesium alloy rolled material thus produced is subjected to an intermediate annealing process at a high temperature of 300 DEG C or higher during the rolling process, thereby suppressing the generation of precipitation phases in the magnesium alloy rolled material, reusing the precipitated phase and removing residual stress partially accumulated by rolling It is possible to increase the rolling property. In addition, the precipitation phase in the magnesium alloy rolled material is reduced through such a process and the grain size is formed as large as about 10 to 20 mu m, resulting in high strength and high corrosion resistance.
FIG. 4 is a photograph showing the state of crystal grains of a rolled material manufactured by the method for manufacturing a magnesium alloy rolled material according to an embodiment of the present invention and a magnesium alloy rolled material produced by a conventional method, and FIG. And a magnesium alloy rolled material manufactured by a conventional method. The graphs of the results of the experiments show that the weight loss rate is measured using the rolled material manufactured by the method of manufacturing the magnesium alloy rolled material according to the present invention and the magnesium alloy rolled material manufactured by the prior art.
In order to measure the corrosion resistance of the magnesium alloy rolled material produced by the method of manufacturing the magnesium alloy rolled material according to the embodiment of the present invention, the following experiment was conducted.
A specimen is prepared from the magnesium alloy rolled material manufactured under the conditions shown in Table 1 below. Specimen 1 (Example) was prepared by cutting a part of the magnesium alloy rolled material produced according to the embodiment of the present invention. Specimen 2 (Comparative Example) was obtained by cutting a part of the magnesium alloy rolled material produced according to the prior art (Psalm 11, 12, 13, Psalm 21, 22, and 23), respectively.
First, the grain size was measured from the prepared specimen. As shown in FIG. 4, the grain size of the magnesium alloy rolled material produced by the prior art was measured to be about 2.24 μm, and the grain size of the magnesium alloy rolled material produced by the embodiment of the present invention was 17.34 μm Respectively. That is, it can be seen that the grain size of the magnesium alloy rolled material produced according to the embodiment of the present invention is formed larger than the grain size of the magnesium alloy rolled material manufactured by the prior art.
Each specimen was prepared in a size of 2 cm x 2 cm, and the surface was alternately polished at 150 rpm for 5 seconds using a sand paper of 200 and 2000 grids. At this time, the polishing of the specimen was carried out over the entire surface of the specimen, and was performed three times for each sand paper. Thereafter, the specimen was dried using a drier, and then the size (non-formed material) and the weight of each specimen were measured.
Next, the specimen was immersed in 0.25 L of a 3.5 wt% NaCl solution maintained at 28 DEG C using a thermostat, and then left for 20 hours.
Then, the specimen was taken out from the solution and immersed in chromic acid (CrO3) for 30 minutes to remove the byproducts adhering to the surface of the specimen, and then the weight of each specimen was measured. Tables 2 and 3 below show the weights of the specimens measured before and after the experiment.
Next, the weight reduction rate of the test piece was calculated by the following formula.
(g)
(g)
(Mg / cm2day)
(g)
(g)
(Mg / cm2day)
Referring to Tables 2 and 3 and FIG. 5, the weight reduction rate of the test pieces (specimens 11, 12, 13) prepared according to the embodiment of the present invention is about 0.43 mg / The weight reduction rate of specimens 21, 22, and 23 was calculated to be about 0.74 mg / ㎠day. That is, it is shown that the weight reduction rate of the specimen manufactured by the embodiment of the present invention is lower by about 0.31 mg / cm2day than the specimen manufactured by the prior art. This indicates that the magnesium alloy rolled material produced by the present invention has higher corrosion resistance than the magnesium alloy rolled material produced by the prior art, and the corrosion resistance is improved due to the increase of the grain size.
In the above description, the weight reduction rate of the specimen manufactured according to the embodiment of the present invention is 0.43 mg / cm 2 · day. However, as a result of repeating the experiment, the weight of 0.1 to 0.5 mg / cm 2 · day Respectively.
Although the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims and equivalents thereof.
10: melting furnace 20: nozzle
30: cooling roll
Claims (13)
Casting the molten metal into a magnesium alloy sheet by feeding it to a twin roll casting machine;
Subjecting the magnesium alloy sheet to a solution treatment;
And a step of rolling the solution-treated magnesium alloy sheet material to produce a magnesium alloy rolled material,
The method for manufacturing a magnesium alloy rolled material according to claim 1, wherein the magnesium alloy sheet material is rolled in a plurality of times, and the magnesium alloy rolled material is heated to a temperature of 300 ° C or higher during the rolling.
Wherein the molten magnesium alloy comprises 8 to 10% by weight of aluminum based on the total weight of the molten magnesium alloy in the process of preparing the molten magnesium alloy.
Wherein the magnesium alloy sheet material is cast to a thickness of 4 to 6 mm in the course of casting the magnesium alloy sheet material.
Wherein the magnesium alloy sheet material is maintained at a temperature of 350 DEG C or higher for at least 48 hours during the solution treatment.
And cooling the magnesium alloy sheet material subjected to the solution treatment at a rate of 10 to 50 ° C / minute to 100 to 200 ° C after the solution treatment process.
Wherein the temperature of the magnesium alloy sheet material is maintained at 250 to 350 DEG C in the course of manufacturing the magnesium alloy rolled material.
Wherein the magnesium alloy rolled material is manufactured by multipass rolling the magnesium alloy sheet material multiple times.
Wherein the intermediate annealing step is performed every 2 to 3 passes in the course of manufacturing the magnesium alloy rolled material.
Wherein the intermediate annealing is performed for 30 minutes to 90 minutes.
Wherein the magnesium alloy rolled material has a thickness of 0.2 to 4 mm in the course of manufacturing the magnesium alloy rolled material.
Wherein the magnesium alloy rolled material has a grain size of 10 to 20 占 퐉.
Wherein the magnesium alloy rolled material has a weight loss rate of 0.1 to 0.5 mg / cm 2 · day in a solution containing NaCl.
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| KR1020140085245A KR20160006320A (en) | 2014-07-08 | 2014-07-08 | Magnesium alloy plate and the manufacturing method thereof |
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| KR1020140085245A KR20160006320A (en) | 2014-07-08 | 2014-07-08 | Magnesium alloy plate and the manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190078258A (en) * | 2017-12-26 | 2019-07-04 | 주식회사 포스코 | Magnesium alloy sheet and method for manufacturing the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110130401A (en) | 2009-03-12 | 2011-12-05 | 스미토모덴키고교가부시키가이샤 | Magnesium alloy member |
| KR20130074275A (en) | 2011-12-26 | 2013-07-04 | 주식회사 포스코 | Magnesium-based metal material having excellent corrosion resistance and method for manufacturing the same |
| KR20130122943A (en) | 2010-11-16 | 2013-11-11 | 스미토모덴키고교가부시키가이샤 | Magnesium alloy sheet and process for producing same |
| KR20140002726A (en) | 2011-02-14 | 2014-01-08 | 스미토모덴키고교가부시키가이샤 | Rolled magnesium alloy material, magnesium alloy member, and method for producing rolled magnesium alloy material |
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- 2014-07-08 KR KR1020140085245A patent/KR20160006320A/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110130401A (en) | 2009-03-12 | 2011-12-05 | 스미토모덴키고교가부시키가이샤 | Magnesium alloy member |
| KR20130122943A (en) | 2010-11-16 | 2013-11-11 | 스미토모덴키고교가부시키가이샤 | Magnesium alloy sheet and process for producing same |
| KR20140002726A (en) | 2011-02-14 | 2014-01-08 | 스미토모덴키고교가부시키가이샤 | Rolled magnesium alloy material, magnesium alloy member, and method for producing rolled magnesium alloy material |
| KR20130074275A (en) | 2011-12-26 | 2013-07-04 | 주식회사 포스코 | Magnesium-based metal material having excellent corrosion resistance and method for manufacturing the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190078258A (en) * | 2017-12-26 | 2019-07-04 | 주식회사 포스코 | Magnesium alloy sheet and method for manufacturing the same |
| WO2019132452A1 (en) * | 2017-12-26 | 2019-07-04 | 주식회사 포스코 | Magnesium alloy sheet and method for producing same |
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