CN111500880A - High-conductivity aluminum-magnesium alloy for spiral welded pipe and production method thereof - Google Patents
High-conductivity aluminum-magnesium alloy for spiral welded pipe and production method thereof Download PDFInfo
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- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
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Abstract
The invention provides a high-conductivity aluminum-magnesium alloy for a spiral welded pipe and a production method thereof, wherein the high-conductivity aluminum-magnesium alloy comprises the following components in percentage by mass: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.001 percent of copper, less than or equal to 0.001 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.001 percent of vanadium, less than or equal to 0.001 percent of chromium, and the balance of aluminum and inevitable impurities; the alloy is produced by the following steps: preparing materials, and then carrying out smelting refining; adding pure inert gas into the refined melt, stirring to remove impurity gas, and filtering the melt by using a ceramic double-stage filter plate; casting the filtered melt to form an aluminum magnesium alloy ingot, and controlling the grain size grade of the ingot to be more than or equal to grade 3; carrying out two-stage homogenization treatment on the cast ingot; and then discharging the aluminum-magnesium alloy from the furnace and carrying out hot rolling to form an aluminum-magnesium alloy hot rolled coil with the thickness of 6-10 mm. Compared with the prior art, the high-conductivity aluminum-magnesium alloy for the spiral welded pipe prepared by the production method disclosed by the invention has the advantages that the tensile strength is ensured, and the conductivity is improved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of aluminum alloy, in particular to a high-conductivity aluminum-magnesium alloy for a spiral welded pipe and a production method thereof.
[ background of the invention ]
The spiral welded pipe has high electric conduction and heat conduction capability and strong electromagnetic shielding capability, and is widely applied to power transmission buried pipelines.
In the related art, due to the special working environment, high requirements are provided for the tensile strength, the corrosion resistance and the welding performance of the used materials, so that the 5754 aluminum alloy is generally selected to manufacture the spiral welding pipe.
However, although the 5754 aluminum alloy of the related art has satisfactory tensile strength, corrosion resistance and welding performance when used for manufacturing a spiral welded pipe, it is very difficult to greatly improve the electrical conductivity due to the high alloying degree.
Therefore, there is a need to provide a new high conductivity aluminum magnesium alloy for spiral welded pipes and a method for producing the same to solve the above-mentioned problems.
[ summary of the invention ]
The invention aims to provide a high-conductivity aluminum-magnesium alloy for a spiral welded pipe with high conductivity and good tensile strength and a production method thereof.
In order to achieve the above object, the present invention provides a method for producing a high conductivity aluminum magnesium alloy for a spiral welded pipe, comprising the steps of:
step S1, batching: the aluminum magnesium alloy is prepared from the following components in percentage by mass: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.1 percent of copper, less than or equal to 0.15 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.05 percent of vanadium, less than or equal to 0.05 percent of chromium, and the balance of aluminum and inevitable impurities;
step S2, smelting and refining: smelting the aluminum magnesium alloy raw material in a smelting furnace to form an aluminum magnesium alloy melt, wherein the temperature of the aluminum magnesium alloy melt is less than or equal to 750 ℃; pouring the aluminum magnesium alloy melt into a refining furnace for refining for 30 minutes, wherein the temperature of the refined aluminum magnesium alloy melt is more than or equal to 720 ℃, and the refined aluminum magnesium alloy melt is kept stand for 30-40 minutes at the temperature of 720 ℃;
step S3, degassing and deslagging: adding pure inert gas into the refined aluminum magnesium alloy melt, stirring the aluminum magnesium alloy melt to remove impurity gas, and filtering the stirred aluminum magnesium alloy melt by using a ceramic double-stage filter plate with the combined grade of 30PPI and 50 PPI;
step S4, casting: casting the filtered aluminum magnesium alloy melt to form an aluminum magnesium alloy ingot, and controlling the grain size grade of the aluminum magnesium alloy ingot to be more than or equal to grade 3;
step S5, homogenization: sawing and milling the aluminum magnesium alloy ingot, then feeding the aluminum magnesium alloy ingot into a heating furnace for heat preservation, carrying out homogenization treatment on the aluminum magnesium alloy ingot by adopting a low-temperature and high-temperature two-stage homogenization process, and preserving heat for 6-15 hours;
step S6, hot rolling: discharging the homogenized aluminum-magnesium alloy ingot, and performing rough rolling at 480 +/-10 ℃ to form an aluminum-magnesium alloy intermediate blank with the thickness of 30-35 mm, wherein the temperature of the aluminum-magnesium alloy intermediate blank is 400-420 ℃; and finally, carrying out finish rolling on the aluminum-magnesium alloy intermediate blank at the temperature of 340 +/-10 ℃ to form an aluminum-magnesium alloy hot rolled coil with the thickness of 6-10 mm.
Preferably, in the step S1, the aluminum magnesium alloy raw material comprises the following components by mass percent: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.001 percent of copper, less than or equal to 0.001 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.001 percent of vanadium, less than or equal to 0.001 percent of chromium, and the balance of aluminum and inevitable impurities.
Preferably, step S2 further includes adding a zinc removing agent and an aluminum boron alloy during the melting process to remove zinc and vanadium from the aluminum magnesium alloy melt.
Preferably, the temperature for adding the zinc removing agent is 700-760 ℃; the temperature for adding the aluminum boron alloy is 750-850 ℃.
Preferably, when the low-temperature and high-temperature two-stage homogenization process of step S5 is performed, the temperature of the low-temperature stage is 150 ℃ to 300 ℃, and the temperature of the high-temperature stage is 450 ℃ to 550 ℃.
Preferably, when the aluminum-magnesium alloy raw material is prepared, the balance is aluminum and inevitable impurities, and the purity of the aluminum is more than or equal to 99.85%.
The invention also provides a high-conductivity aluminum-magnesium alloy for the spiral welded pipe, which comprises the following components in percentage by mass: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.001 percent of copper, less than or equal to 0.001 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.001 percent of vanadium, less than or equal to 0.001 percent of chromium, and the balance of aluminum and inevitable impurities.
Preferably, the high-conductivity aluminum-magnesium alloy for the spiral welded pipe is prepared by the production method of the high-conductivity aluminum-magnesium alloy for the spiral welded pipe.
Compared with the prior art, in the production method of the high-conductivity aluminum-magnesium alloy for the spiral welded pipe, the coarse grain structure is formed by controlling the grain size grade of the aluminum-magnesium alloy cast ingot to be more than or equal to 3 grade; meanwhile, the technological parameters such as rough rolling temperature, thickness of the aluminum-magnesium alloy hot rolled coil, finishing rolling temperature and the like are controlled, and the coarse grain structure is reserved to produce the high-conductivity aluminum-magnesium alloy for the spiral welded pipe. The high-conductivity aluminum-magnesium alloy for the spiral welded pipe further improves the conductivity of the alloy while ensuring the stronger tensile strength of the alloy.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic flow chart of the production method of the high-conductivity aluminum-magnesium alloy for the spiral welded pipe of the present invention.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, the present invention provides a method for producing a high conductivity aluminum magnesium alloy for a spiral welded pipe, the method comprising the following steps.
Step S1, batching: the aluminum magnesium alloy is prepared from the following components in percentage by mass: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.001 percent of copper, less than or equal to 0.001 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.001 percent of vanadium, less than or equal to 0.001 percent of chromium, and the balance of aluminum and inevitable impurities. In the embodiment, the balance is aluminum and inevitable impurities, and the purity of the aluminum is more than or equal to 99.85%.
Step S2, smelting and refining: smelting the aluminum magnesium alloy raw material in a smelting furnace to form an aluminum magnesium alloy melt, wherein the temperature of the aluminum magnesium alloy melt is less than or equal to 750 ℃; pouring the aluminum magnesium alloy melt into a refining furnace for refining for 30 minutes, wherein the temperature of the refined aluminum magnesium alloy melt is more than or equal to 720 ℃, and the refined aluminum magnesium alloy melt is kept stand for 30-40 minutes at the temperature of 720 ℃.
In the embodiment, a zinc removing agent and an aluminum boron alloy are added in the smelting process to remove zinc and vanadium in the aluminum magnesium alloy melt; preferably, the temperature for adding the zinc removing agent is 700-760 ℃; the temperature for adding the aluminum boron alloy is 750-850 ℃.
Step S3, degassing and deslagging: adding pure inert gas into the refined aluminum magnesium alloy melt, stirring the aluminum magnesium alloy melt to remove impurity gas, and filtering the stirred aluminum magnesium alloy melt by using a ceramic double-stage filter plate with the combined grade of 30PPI and 50 PPI.
Step S4, casting: casting the filtered aluminum magnesium alloy melt to form an aluminum magnesium alloy cast ingot, and controlling the grain size grade of the aluminum magnesium alloy cast ingot to be more than or equal to grade 3. In this embodiment, before casting, no al-ti-b wire is added to the filtered al-mg alloy melt for on-line refinement, so that the grain size of the al-mg alloy ingot is relatively large, and the finally obtained high-conductivity al-mg alloy for the spiral welded pipe has higher conductivity.
Step S5, homogenization: and sawing and milling the aluminum-magnesium alloy ingot, then feeding the aluminum-magnesium alloy ingot into a heating furnace for heat preservation, carrying out homogenization treatment on the aluminum-magnesium alloy ingot by adopting a low-temperature and high-temperature two-stage homogenization process, and preserving heat for 6-15 hours.
Namely, a low-temperature and high-temperature two-stage homogenization process is adopted during homogenization, the temperature is kept for a long enough time, so that solid solution formed in the semi-continuous ingot casting process is fully precipitated in the homogenization stage to form a dispersed second phase, and the conductivity is improved.
In this embodiment, when the low-temperature and high-temperature two-stage homogenization process of step S5 is performed, the temperature of the low-temperature stage is 150 ℃ to 300 ℃, and the temperature of the high-temperature stage is 450 ℃ to 550 ℃.
Step S6, hot rolling: discharging the homogenized aluminum-magnesium alloy ingot, and performing rough rolling at 480 +/-10 ℃ to form an aluminum-magnesium alloy intermediate blank with the thickness of 30-35 mm, wherein the temperature of the aluminum-magnesium alloy intermediate blank is 400-420 ℃; and finally, carrying out finish rolling on the aluminum-magnesium alloy intermediate blank at the temperature of 340 +/-10 ℃ to form an aluminum-magnesium alloy hot rolled coil with the thickness of 6-10 mm.
The first group of high-conductivity aluminum-magnesium alloy for the spiral welded pipe produced by the steps comprises the following components in percentage by mass: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.001 percent of copper, less than or equal to 0.001 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.001 percent of vanadium, less than or equal to 0.001 percent of chromium, and the balance of aluminum and inevitable impurities.
In the production method of the high-conductivity aluminum-magnesium alloy for the spiral welded pipe, the 5754 aluminum alloy is modified; in the ingot casting process, no grain refiner is added, and the grain size grade of the aluminum-magnesium alloy ingot casting is controlled to be more than or equal to grade 3, so that a coarse grain structure is formed; meanwhile, the technological parameters such as rough rolling temperature, thickness of the aluminum-magnesium alloy hot rolled coil, finishing rolling temperature and the like are controlled, and the coarse grain structure is reserved to produce the high-conductivity aluminum-magnesium alloy for the spiral welded pipe. The high-conductivity aluminum-magnesium alloy for the spiral welded pipe further improves the conductivity of the alloy while ensuring the stronger tensile strength of the alloy.
Example two
The second embodiment is substantially the same as the first embodiment except that, in the step S1, the mass percentages of the components in the aluminum magnesium alloy raw material may further be: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.1 percent of copper, less than or equal to 0.15 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.05 percent of vanadium, less than or equal to 0.05 percent of chromium, and the balance of aluminum and inevitable impurities.
In the first embodiment, the percentage of copper, manganese, vanadium and chromium is relatively low compared to the second embodiment, and as shown in the first table, the conductivity of the high conductivity aluminum-magnesium alloy produced in the first embodiment is higher than that of the high conductivity aluminum-magnesium alloy produced in the second embodiment; because the conductivity is inversely proportional to the alloying degree, the contents of copper, manganese, vanadium and chromium are reduced on the premise of ensuring the main alloying element magnesium, and the conductivity can be improved.
The second group of the high-conductivity aluminum-magnesium alloy for the spiral welded pipe produced by the steps comprises the following components in percentage by mass: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.001 percent of copper, less than or equal to 0.001 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.001 percent of vanadium, less than or equal to 0.001 percent of chromium, and the balance of aluminum and impurities.
EXAMPLE III
Example three is substantially the same as the production method of example one except that step S2 is performed without adding a zinc remover and an aluminum boron alloy to remove zinc and vanadium from the aluminum magnesium alloy melt during the melting process.
In the production method of the high-conductivity aluminum-magnesium alloy for the spiral welded pipe, the 5754 aluminum alloy is modified. The conductivity of the high conductivity aluminum-magnesium alloy produced in the first example is higher than that of the high conductivity aluminum-magnesium alloy produced in the third example, as shown in the first table. Since the strength is in direct proportion to the alloying degree, the conductivity is in inverse proportion to the alloying degree; in the first embodiment, on the premise of fully ensuring the main alloy element magnesium, elements which have great influence on the conductivity, such as trace elements chromium, copper, manganese and the like in the raw materials, are controlled; namely, zinc removing agent and aluminum boron alloy are added in the smelting process to remove trace elements such as zinc, vanadium and the like, thereby improving the conductivity while ensuring the tensile strength.
The third group of the high-conductivity aluminum-magnesium alloy for the spiral welded pipe produced by the steps comprises the following components in percentage by mass: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.001 percent of copper, less than or equal to 0.001 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.001 percent of vanadium, less than or equal to 0.001 percent of chromium, and the balance of aluminum and inevitable impurities.
Comparative example
Three comparative examples are provided below to further illustrate the invention.
Comparative example 1
The comparative example I is substantially the same as the production method in the example I, except that in the step of S3, an aluminum-titanium-boron wire is added into the filtered aluminum-magnesium alloy melt for online refining, so that the grain size grade of the aluminum-magnesium alloy ingot is controlled to be 1 grade. The fourth group of spiral welded pipes produced by the steps are made of the high-conductivity aluminum-magnesium alloy.
Comparative example No. two
The second comparative example is substantially the same as the first example except that the homogenization treatment in step S5 is performed by sawing, milling and heating the aluminum-magnesium alloy ingot in a heating furnace at 500 ℃ for 2 hours. The fifth group of spiral welded pipes produced by the steps are made of the high-conductivity aluminum-magnesium alloy.
Comparative example No. three
Comparative example three is substantially the same as the production method in example one except that the finish rolling temperature is 320 ± 10 ℃ when step S5 is performed. And the sixth group of the spiral welded pipes produced by the steps are made of the high-conductivity aluminum-magnesium alloy.
Table 1 shows the mechanical properties and conductivity test results of the high conductivity aluminum alloys for the spiral welded pipes obtained in examples one to three and comparative examples one to three.
As can be seen from table 1, the first embodiment is different from the second embodiment in that the first embodiment has relatively less copper, manganese, vanadium and chromium percentages, and thus the obtained high-conductivity aluminum alloy for the spiral welded pipe has the highest conductivity; namely, because the conductivity is inversely proportional to the alloying degree, the contents of copper, manganese, vanadium and chromium can be reduced to improve the conductivity on the premise of ensuring the main alloying element magnesium.
Compared with the first embodiment, the first embodiment is to perform the step S2, in the first embodiment, the zinc remover and the aluminum boron alloy are added during the melting process to remove zinc and vanadium in the aluminum magnesium alloy melt, and in the first embodiment, on the premise of fully ensuring the main alloying element magnesium, the trace elements chromium, copper, manganese and the like in the raw materials are controlled to have a large influence on the electrical conductivity; namely, zinc removing agent and aluminum boron alloy are added in the smelting process to remove trace elements such as zinc, vanadium and the like, thereby improving the conductivity while ensuring the tensile strength.
Compared with the first comparative example, in the first example, before casting, no aluminum-titanium-boron wire is added into the filtered aluminum-magnesium alloy melt for online refining, so that the grain size of the aluminum-magnesium alloy cast ingot is relatively larger, and the finally obtained high-conductivity aluminum-magnesium alloy for the spiral welded pipe has higher conductivity.
Compared with the second comparative example, the first example adopts a low-temperature and high-temperature two-stage homogenization process to carry out homogenization treatment on the aluminum-magnesium alloy ingot, so that a solid solution formed in the semi-continuous ingot casting process is fully precipitated in a homogenization stage to form a dispersed second phase, and thus the conductivity is improved.
Compared with the third comparative example, the finish rolling temperature of the first example is relatively higher, and the higher the finish rolling temperature is, the higher the conductivity is.
In conclusion, compared with the common 5754 aluminum alloy (i.e., the unmodified 5754 aluminum alloy), the high-conductivity aluminum alloy for the spiral welded pipe (i.e., the modified 5754 aluminum alloy) provided by the invention is improved in the aspects of casting process, homogenization treatment, hot rolling process, temperature and the like, so that the conductivity of the high-conductivity aluminum alloy for the spiral welded pipe can reach over 40% IACS (International Association of chemical entities), and can reach up to 41.6% IACS (International Association of chemical entities). The tensile strength is 200-240MPa, the yield strength is more than 100MPa, the elongation is more than 20 percent, and the production requirements of high conductivity and good mechanical property can be met.
TABLE 1
| First group | Second group | Third group | Fourth group | Fifth group | Sixth group | |
| Tensile strength (MPa) | 216 | 211 | 214 | 220 | 215 | 222 |
| Yield strength (MPa) | 125 | 132 | 160 | 133 | 120 | 127 |
| Elongation (%) | 33 | 35 | 33 | 30 | 36 | 28 |
| Electrical conductivity (% IACS) | 41.6 | 40.1 | 40.3 | 40.1 | 40.0 | 41.3 |
Compared with the prior art, in the production method of the high-conductivity aluminum-magnesium alloy for the spiral welded pipe, the coarse grain structure is formed by controlling the grain size grade of the aluminum-magnesium alloy cast ingot to be more than or equal to 3 grade; meanwhile, the technological parameters such as rough rolling temperature, thickness of the aluminum-magnesium alloy hot rolled coil, finishing rolling temperature and the like are controlled, and the coarse grain structure is reserved to produce the high-conductivity aluminum-magnesium alloy for the spiral welded pipe. The high-conductivity aluminum-magnesium alloy for the spiral welded pipe further improves the conductivity of the alloy while ensuring the stronger tensile strength of the alloy.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A production method of high-conductivity aluminum-magnesium alloy for a spiral welded pipe is characterized by comprising the following steps:
step S1, batching: the aluminum magnesium alloy is prepared from the following components in percentage by mass: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.1 percent of copper, less than or equal to 0.15 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.05 percent of vanadium, less than or equal to 0.05 percent of chromium, and the balance of aluminum and inevitable impurities;
step S2, smelting and refining: smelting the aluminum magnesium alloy raw material in a smelting furnace to form an aluminum magnesium alloy melt, wherein the temperature of the aluminum magnesium alloy melt is less than or equal to 750 ℃; pouring the aluminum magnesium alloy melt into a refining furnace for refining for 30 minutes, wherein the temperature of the refined aluminum magnesium alloy melt is more than or equal to 720 ℃, and the refined aluminum magnesium alloy melt is kept stand for 30-40 minutes at the temperature of 720 ℃;
step S3, degassing and deslagging: adding pure inert gas into the refined aluminum magnesium alloy melt, stirring the aluminum magnesium alloy melt to remove impurity gas, and filtering the stirred aluminum magnesium alloy melt by using a ceramic double-stage filter plate with the combined grade of 30PPI and 50 PPI;
step S4, casting: casting the filtered aluminum magnesium alloy melt to form an aluminum magnesium alloy ingot, and controlling the grain size grade of the aluminum magnesium alloy ingot to be more than or equal to grade 3;
step S5, homogenization: sawing and milling the aluminum magnesium alloy ingot, then feeding the aluminum magnesium alloy ingot into a heating furnace for heat preservation, carrying out homogenization treatment on the aluminum magnesium alloy ingot by adopting a low-temperature and high-temperature two-stage homogenization process, and preserving heat for 6-15 hours;
step S6, hot rolling: discharging the homogenized aluminum-magnesium alloy ingot, and performing rough rolling at 480 +/-10 ℃ to form an aluminum-magnesium alloy intermediate blank with the thickness of 30-35 mm, wherein the temperature of the aluminum-magnesium alloy intermediate blank is 400-420 ℃; and finally, carrying out finish rolling on the aluminum-magnesium alloy intermediate blank at the temperature of 340 +/-10 ℃ to form an aluminum-magnesium alloy hot rolled coil with the thickness of 6-10 mm.
2. The method for producing the high-conductivity aluminum-magnesium alloy for the spiral welded pipe according to claim 1, wherein the aluminum-magnesium alloy raw material comprises the following components in percentage by mass when step S1 is performed: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.001 percent of copper, less than or equal to 0.001 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.001 percent of vanadium, less than or equal to 0.001 percent of chromium, and the balance of aluminum and inevitable impurities.
3. The method for producing a high-conductivity aluminum-magnesium alloy for spiral welded pipes as claimed in claim 1, wherein step S2 further comprises adding a zinc remover and an aluminum-boron alloy during melting to remove zinc and vanadium from the aluminum-magnesium alloy melt.
4. The method for producing a high-conductivity aluminum-magnesium alloy for a spiral welded pipe as claimed in claim 3, wherein the temperature at which the dezincing agent is added is 700 ℃ to 760 ℃; the temperature for adding the aluminum boron alloy is 750-850 ℃.
5. The method for producing a high-conductivity aluminum-magnesium alloy for a spiral welded pipe according to claim 1, wherein the low-temperature and high-temperature two-stage homogenization process of step S5 is performed at a low-temperature stage temperature of 150 ℃ to 300 ℃ and at a high-temperature stage temperature of 450 ℃ to 550 ℃.
6. The method for producing a high-conductivity aluminum-magnesium alloy for a spiral welded pipe according to any one of claims 1 to 5, wherein the aluminum-magnesium alloy raw material is provided with a purity of not less than 99.85% of aluminum and inevitable impurities as the balance.
7. The high-conductivity aluminum-magnesium alloy for the spiral welded pipe is characterized by comprising the following components in percentage by mass: less than or equal to 0.10 percent of silicon, less than or equal to 0.10 percent of iron, less than or equal to 0.001 percent of copper, less than or equal to 0.001 percent of manganese, 2.6 to 3.0 percent of magnesium, less than or equal to 0.002 percent of zinc, less than or equal to 0.001 percent of vanadium, less than or equal to 0.001 percent of chromium, and the balance of aluminum and inevitable impurities.
8. The high-conductivity aluminum-magnesium alloy for a spiral welded pipe according to claim 7, which is produced by the production method for a high-conductivity aluminum-magnesium alloy for a spiral welded pipe according to any one of claims 1 to 6.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113337760A (en) * | 2021-06-04 | 2021-09-03 | 河南明晟新材料科技有限公司 | Method for improving O-state conductivity of 5754 alloy |
| CN114015916A (en) * | 2021-11-08 | 2022-02-08 | 隆达铝业（顺平）有限公司 | Aluminum-magnesium alloy material for high-toughness structural member and preparation method thereof |
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| CN114015916A (en) * | 2021-11-08 | 2022-02-08 | 隆达铝业（顺平）有限公司 | Aluminum-magnesium alloy material for high-toughness structural member and preparation method thereof |
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