Method for producing 6013 aluminum alloy wire through continuous casting and rolling process and 6013 aluminum alloy wire

Abstract

The invention relates to the technical field of aluminum alloy wire machining, and discloses a method for producing a 6013 aluminum alloy wire through a continuous casting and rolling process. The method comprises the steps that molten aluminum with the aluminum content not lower than 99.70% is smelted at the temperature of 700-760 DEG C, and then an aluminum-manganese alloy, an aluminum-chromium alloy, an aluminum-silicon alloy, copper, magnesium and an aluminum-titanium alloy are added for alloying; and then in-furnace melt purification treatment, online degassing and refining filtration are carried out, and then continuous casting, surface milling, uniform heating, rough rolling, finish rolling, online atomization quenching and coiling are carried out. The obtained 6013 aluminum alloy wire is good in surface quality and high in geometric dimension precision, the diameter deviation is within + / -0.5 mm, the tensile strength fluctuation is within 60 MPa, the elongation is good, the fluctuation is smaller than 4%, the product quality is stable, the production efficiency is high, the continuous length of a finished product roll is 5300 m per roll, continuous production of a small extruding machine, a drawing machine and the like can be achieved, and the yield is high.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy wire processing technology, specifically to a method for producing 6013 aluminum alloy wire using a continuous casting and rolling process, and to 6013 aluminum alloy wire. Background Technology

[0002] 6013 aluminum alloy is one of the most advanced aluminum alloys in the world today. It has a series of properties such as excellent formability (castability, plastic formability, weldability), moderate specific strength, good corrosion resistance, high damage tolerance, and excellent thermal exposure stability. It has significant application prospects in large civil aircraft, military carrier-based aircraft, rail transportation and other fields.

[0003] Domestic 6013 production mainly adopts semi-continuous direct water-cooled casting (DC Casting), which limits the product length (≤15 meters). The large difference between the surface and core structure of the wire leads to large performance deviations. Downstream manufacturers need to be equipped with large extrusion presses and have high requirements for the skill level of operators. Different operators have large differences in product quality and poor stability. Summary of the Invention

[0004] This invention aims to overcome the shortcomings of existing technologies and provides a method for producing 6013 aluminum alloy wire using a continuous casting and rolling process.

[0005] A first aspect of the present invention provides a method for producing 6013 aluminum alloy wire using a continuous casting and rolling process, comprising the following steps: S1. Aluminum molten metal smelting: control the aluminum content to be not less than 99.70%, and control the temperature to be 700℃~760℃; S2, Aluminum Liquid Alloying: Add aluminum-manganese alloy, aluminum-chromium alloy, aluminum-silicon alloy, copper, magnesium, and aluminum-titanium alloy to the aluminum liquid in S1. The composition of the alloyed aluminum liquid is as follows by weight percentage: Si: 0.6%~1.0%, Fe≤0.5%, Cu: 0.6%~1.1%, Mg: 0.8%~1.2%, Mn: 0.2%~0.8%, Cr: 0.03%~0.09%, Ti: 0.02%~0.12%, and other individual elements ≤0.05%. S3. In-furnace melt purification treatment: The alloyed aluminum liquid is refined by powder spraying, and the slag is removed after completion. S4. Online degassing, grain refinement, and filtration of molten aluminum: Online degassing, grain refinement, and filtration of molten aluminum after slag removal; S5. Continuous casting of molten aluminum: The molten aluminum treated by S4 is poured into a crystallizer and continuously cast into aluminum billets. S6. Milling the aluminum billet: The surface of the aluminum billet obtained in S5 is milled to remove the oxide layer; S7. Reheating of aluminum billet: The aluminum billet after milling is homogenized and then reheated. S8. Aluminum billet rough rolling: The reheated aluminum billet is subjected to multiple passes of rough rolling. S9. Finish rolling of aluminum billet: The billet after rough rolling is subjected to multiple passes of finish rolling to obtain aluminum alloy wire rods; S10, Wire rod quenching: Online atomization quenching of the finished wire rod; S11. Winding: Winding the quenched wire rod into a coil.

[0006] Furthermore, in step S2, an aluminum-manganese alloy containing 20wt% manganese, an aluminum-chromium alloy containing 20wt% chromium, an aluminum-silicon alloy containing 15wt% silicon, and an oxygen-free copper wire blank are first added, and the mixture is left to stand for more than 20 minutes. After removing the surface slag, metallic magnesium and an aluminum-titanium alloy containing 10wt% titanium are then added.

[0007] Further, in step S4, the online degassing uses a dual-rotor degassing device to reduce the hydrogen content of the molten aluminum to below 0.20 mg / 100 ml; the grain refinement is achieved by adding a combination of AlTi5B1 aluminum titanium boron wire and aluminum lanthanum wire as a grain refiner; the filtration uses 40 ppi and 60 ppi ceramic filter plates installed in the filter box for primary and secondary filtration, and a 25 ppi ceramic filter plate installed in the intermediate casting ladle for tertiary filtration.

[0008] Furthermore, in step S5, the crystallizer is a crystallization cavity composed of a copper liner and a steel strip. During the casting process, the fluctuation of the casting liquid level is controlled at 0mm~5mm, and the casting speed is 5t / h~6.5t / h.

[0009] Furthermore, in step S6, a continuous milling machine is used for milling.

[0010] Furthermore, in step S7, the aluminum billet is reheated using a medium-frequency induction furnace.

[0011] Furthermore, in step S8, the roughing is performed using a two-roll mill in four passes; in step S9, the finishing is performed using a three-roll mill in six consecutive passes.

[0012] Furthermore, in step S10, the wire rod is quenched using atomized water, with a cooling rate of not less than 100°C / second.

[0013] In a second aspect, the present invention provides a 6013 aluminum alloy wire prepared by the above method, wherein the 6013 aluminum alloy wire has a smooth surface, is free from cracks, burrs, and peeling defects, and has a continuous length of not less than 5300 meters per roll.

[0014] Furthermore, the diameter deviation of the 6013 aluminum alloy wire is within ±0.5mm, the tensile strength is 380MPa~440MPa, and the elongation is 5%~8%.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: The method for producing 6013 aluminum alloy wire using continuous casting and rolling technology provided by this invention produces 6013 aluminum alloy wire with good surface quality, high geometric accuracy (diameter deviation within ±0.5mm), tensile strength fluctuation within 60MPa, good elongation with fluctuation of less than 4%, stable product quality, and high production efficiency. The finished coil has a continuous length of 5300 meters (per coil) and can realize continuous production using small extrusion presses, drawing machines, etc., with a high yield. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in the embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the method for producing 6013 aluminum alloy wire using the continuous casting and rolling process provided in an embodiment of the present invention. Detailed Implementation

[0018] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0019] A first aspect of this invention provides a method for producing 6013 aluminum alloy wire using a continuous casting and rolling process, comprising the following steps: S1. Aluminum molten metal smelting: control the aluminum content to be not less than 99.70%, and control the temperature to be 700℃~760℃; S2, Aluminum Liquid Alloying: Add aluminum-manganese alloy, aluminum-chromium alloy, aluminum-silicon alloy, copper, magnesium, and aluminum-titanium alloy to the aluminum liquid in S1. The composition of the alloyed aluminum liquid is as follows by weight percentage: Si: 0.6%~1.0%, Fe≤0.5%, Cu: 0.6%~1.1%, Mg: 0.8%~1.2%, Mn: 0.2%~0.8%, Cr: 0.03%~0.09%, Ti: 0.02%~0.12%, and other individual elements ≤0.05%. S3. In-furnace melt purification treatment: The alloyed aluminum liquid is refined by powder spraying, and the slag is removed after completion. S4. Online degassing, grain refinement, and filtration of molten aluminum: Online degassing, grain refinement, and filtration of molten aluminum after slag removal; S5. Continuous casting of molten aluminum: The molten aluminum treated by S4 is poured into a crystallizer and continuously cast into aluminum billets. S6. Milling the aluminum billet: The surface of the aluminum billet obtained in S5 is milled to remove the oxide layer; S7. Reheating of aluminum billet: The aluminum billet after milling is homogenized and then reheated. S8. Aluminum billet rough rolling: The reheated aluminum billet is subjected to multiple passes of rough rolling. S9. Finish rolling of aluminum billet: The billet after rough rolling is subjected to multiple passes of finish rolling to obtain aluminum alloy wire rods; S10, Wire rod quenching: Online atomization quenching of the finished wire rod; S11. Winding: Winding the quenched wire rod into a coil; S12. Packaging: 6013 aluminum alloy pole finished coil packaging.

[0020] In some embodiments, in step S2, an aluminum-manganese alloy containing 20wt% manganese, an aluminum-chromium alloy containing 20wt% chromium, an aluminum-silicon alloy containing 15wt% silicon, and an oxygen-free copper wire blank are first added, and the mixture is left to stand for more than 20 minutes. After removing the surface slag, metallic magnesium and an aluminum-titanium alloy containing 10wt% titanium are then added.

[0021] Specifically, in step S2, the aluminum liquid alloying process is carried out by adding 20wt% aluminum-manganese alloy, 20wt% aluminum-chromium alloy, 15wt% aluminum-silicon alloy, and oxygen-free copper wire blanks first, letting it stand for more than 20 minutes, removing the surface dross, and then adding metallic magnesium and 10wt% aluminum-titanium alloy. This can effectively control the generation of metal impurities, optimize the liquid structure, and reduce the generation of Mg impurities in the liquid metal.

[0022] In some embodiments, in step S4, the online degassing uses a dual-rotor degassing device to reduce the hydrogen content in the molten aluminum to below 0.20 mg / 100mlAl; the grain refinement is achieved by adding a combination of AlTi5B1 aluminum titanium boron wire and aluminum lanthanum wire as a grain refiner; the filtration uses 40ppi and 60ppi ceramic filter plates installed in the filter box for primary and secondary filtration, and a 25ppi ceramic filter plate installed in the intermediate casting ladle for tertiary filtration.

[0023] Specifically, in step S4, the online filtration of molten aluminum uses 40ppi and 60ppi ceramic filter plates installed in the filter box for primary and secondary filtration, and uses 25ppi ceramic filter plates installed in the middle ladle for tertiary filtration of oxides generated by scouring, which greatly improves the purity of molten aluminum.

[0024] In some embodiments, in step S5, the crystallizer is a crystallization cavity composed of a copper liner and a steel strip, and the fluctuation of the casting liquid level is controlled at 0mm~5mm during the casting process, and the casting speed is 5t / h~6.5t / h.

[0025] Specifically, in step S5, during the continuous casting of molten aluminum, an automatic flow control system using a balance is employed to ensure that the surface fluctuation of the molten aluminum is 0mm~5mm, thereby guaranteeing casting stability.

[0026] In some embodiments, in step S6, a continuous milling machine is used for milling.

[0027] In some embodiments, in step S7, the aluminum billet is reheated using a medium-frequency induction furnace to make the overall temperature and microstructure of the aluminum billet uniform.

[0028] In some embodiments, in step S8, the aluminum billet is rough rolled by four two-roll roughing mills; in step S9, the finish rolling is performed by six Y-type three-roll finish rolling mills to obtain 6013 aluminum alloy wire.

[0029] In some embodiments, in step S10, the aluminum alloy wire is quenched by online atomization with prepared soft water, resulting in a temperature drop of more than 100°C per second.

[0030] In some embodiments, in step S11, the 6013 aluminum alloy wire rod is wound using a close-packed automatic winding machine and a dual-disc fully automatic switching winding machine to achieve a close-packed layer winding of 1900kg~2500kg per roll.

[0031] In some embodiments, in step S12, the finished aluminum alloy wire coil is packaged with four plastic steel straps, with appropriate tightness to ensure that it does not come apart or get damaged during transportation, thus guaranteeing product quality in subsequent processing.

[0032] In a second aspect, the present invention provides a 6013 aluminum alloy wire prepared by the above method, which has a smooth surface, no cracks, no burrs, no peeling defects, and a continuous length of not less than 5300 meters per roll.

[0033] Furthermore, the diameter deviation of the 6013 aluminum alloy wire is within ±0.5mm, the tensile strength is 380MPa~440MPa, and the elongation is 5%~8%.

[0034] Example 1: Method for producing 6013 aluminum alloy wire using continuous casting and rolling process like Figure 1 As shown, the method for producing 6013 aluminum alloy wire using continuous casting and rolling process includes the following steps: S1, Aluminum liquid smelting The furnace is filled with molten aluminum with an aluminum content of 99.72% to 99.84% and a cold material ratio of 20% to 30%, and the temperature is controlled at 700℃ to 760℃. S2, aluminum liquid alloying Add 20wt% aluminum-manganese alloy, 20wt% aluminum-chromium alloy, and 15wt% aluminum-silicon alloy to the S1 smelting furnace, along with an upward-drawn oxygen-free copper wire blank. Then add Mg and 10wt% aluminum-titanium alloy to prepare an aluminum liquid with the following weight percentage composition: Si: 0.6%~1.0%, Fe≤0.5%, Cu: 0.6%~1.1%, Mg: 0.8%~1.2%, Mn: 0.2%~0.8%, Cr: 0.03%~0.09%, Ti: 0.02%~0.12%, and other single elements ≤0.05%. S3. In-furnace melt purification treatment The alloy composition and temperature of the melt in the furnace are controlled uniformly as described above. Argon gas and sodium-free refining agent are used for powder spraying refining. The refining time is 15 min to 20 min. After refining, the slag on the surface of the aluminum liquid is removed. S4. Online degassing, refining, and filtration of molten aluminum. The molten aluminum is purified using a dual-chamber, ultra-long-life dual-rotor degassing device, employing argon as the degassing medium for online casting purification, ensuring a hydrogen content of less than 0.20 mg / 100 ml Al. After degassing, AlTi5B1 aluminum-titanium-boron wire refiner and aluminum lanthanum wire refiner are added online to promote grain refinement and optimize phase transformation microstructure. A three-stage filtration process using online ceramic filters (40 ppi and 60 ppi ceramic filters are installed in the filter box for primary and secondary filtration, while a 25 ppi ceramic filter is installed in the intermediate ladle for tertiary filtration of oxides generated by scouring) further purifies the melt. S5, Continuous casting of molten aluminum The casting process employs a Ф2000mm copper cross-section encased in a 2.0mm thick steel strip to form a crystallization cavity for constant cooling and uniform speed casting on all four sides. The casting speed is 5t / h to 6.5t / h, and the surface fluctuation of the molten aluminum is 0mm to 5mm. S6, Milling the edge of the aluminum billet Milling is performed using a continuous milling machine; S7, Aluminum billet reheating Aluminum billets are reheated using a medium-frequency induction furnace; S8, aluminum billet rough rolling The process employs a two-roll, four-pass rolling technique. S9, aluminum billet precision rolling The rough-rolled billet is continuously rolled in six passes using three rolls to obtain 6013 aluminum alloy wire rods; S10 and 6013 aluminum alloy wire rods are subjected to online atomization quenching. Automatic winding of S11 and 6013 aluminum alloy wire rods; S12 and 6013 aluminum alloy poles are packaged in finished coils.

[0035] Comparative Example 1: Method for producing 6013 aluminum alloy wire using continuous casting and rolling process The method for producing 6013 aluminum alloy wire using continuous casting and rolling process includes the following steps: S1, Aluminum liquid smelting The furnace is filled with molten aluminum with an aluminum content of 99.72% to 99.84% and a cold material ratio of 20% to 30%, and the temperature is controlled at 700℃ to 760℃. S2, aluminum liquid alloying Add 20wt% aluminum-manganese alloy, 20wt% aluminum-chromium alloy, and 15wt% aluminum-silicon alloy to the S1 smelting furnace, along with an upward-drawn oxygen-free copper wire blank. Then add Mg and 10wt% aluminum-titanium alloy to prepare an aluminum liquid with the following weight percentage composition: Si: 0.6%~1.0%, Fe≤0.5%, Cu: 0.6%~1.1%, Mg: 0.8%~1.2%, Mn: 0.2%~0.8%, Cr: 0.03%~0.09%, Ti: 0.02%~0.12%, and other single elements ≤0.05%. S3. In-furnace melt purification treatment The alloy composition and temperature of the melt in the furnace are controlled uniformly as described above. Argon gas and sodium-free refining agent are used for powder spraying refining. The refining time is 15 min to 20 min. After refining, the slag on the surface of the aluminum liquid is removed. S4. Online degassing, refining, and filtration of molten aluminum. The molten aluminum is treated with a dual-chamber, ultra-long-life dual-rotor degassing device, using argon as the degassing medium for online casting purification, ensuring a hydrogen content of less than 0.20 mg / 100 ml. After degassing, AlTi5B1 aluminum-titanium-boron wire refiner and aluminum-lanthanum wire refiner are added online to promote grain refinement and optimize phase transformation structure. Three-stage filtration using online ceramic filter plates is then employed for melt purification. S5, Continuous casting of molten aluminum The casting process employs a Ф2000mm copper cross-section encased in a 2.0mm thick steel strip to form a crystallization cavity for constant cooling and uniform speed casting on all four sides. The casting speed is 5t / h to 6.5t / h, and the surface fluctuation of the molten aluminum is 0mm to 5mm. S6, Aluminum billet reheating Aluminum billets are reheated using a medium-frequency induction furnace; S7, rough rolling of aluminum billets The process employs a two-roll, four-pass rolling technique. S8, aluminum billet precision rolling The rough-rolled billet is continuously rolled in six passes using three rolls to obtain 6013 aluminum alloy wire rods; S9 and 6013 aluminum alloy wire rods are subjected to online atomization quenching. Automatic winding of S10 and 6013 aluminum alloy wire rods; S11 and 6013 aluminum alloy poles are packaged in finished coils.

[0036] Comparative Example 2: Method for producing 6013 aluminum alloy wire using continuous casting and rolling process The method for producing 6013 aluminum alloy wire using continuous casting and rolling process includes the following steps: S1, Aluminum liquid smelting The furnace is filled with molten aluminum with an aluminum content of 99.72% to 99.84% and a cold material ratio of 20% to 30%, and the temperature is controlled at 700℃ to 760℃. S2, aluminum liquid alloying Add 20wt% aluminum-manganese alloy, 20wt% aluminum-chromium alloy, and 15wt% aluminum-silicon alloy to the S1 smelting furnace, along with an upward-drawn oxygen-free copper wire blank. Then add Mg and 10wt% aluminum-titanium alloy to prepare an aluminum liquid with the following weight percentage composition: Si: 0.6%~1.0%, Fe≤0.5%, Cu: 0.6%~1.1%, Mg: 0.8%~1.2%, Mn: 0.2%~0.8%, Cr: 0.03%~0.09%, Ti: 0.02%~0.12%, and other single elements ≤0.05%. S3. In-furnace melt purification treatment The alloy composition and temperature of the melt in the furnace are controlled uniformly as described above. Argon gas and sodium-free refining agent are used for powder spraying refining. The refining time is 15 min to 20 min. After refining, the slag on the surface of the aluminum liquid is removed. S4. Online degassing, refining, and filtration of molten aluminum. The molten aluminum is treated with a dual-chamber, ultra-long-life dual-rotor degassing device, using argon as the degassing medium for online casting purification, ensuring a hydrogen content of less than 0.20 mg / 100 ml. After degassing, AlTi5B1 aluminum-titanium-boron wire refiner and aluminum-lanthanum wire refiner are added online to promote grain refinement and optimize phase transformation structure. Three-stage filtration using online ceramic filter plates is then employed for melt purification. S5, Continuous casting of molten aluminum The casting process employs a Ф2000mm copper cross-section encased in a 2.0mm thick steel strip to form a crystallization cavity for constant cooling and uniform speed casting on all four sides. The casting speed is 5t / h to 6.5t / h, and the surface fluctuation of the molten aluminum is 0mm to 5mm. S6, Milling the edge of the aluminum billet Milling is performed using a continuous milling machine; S7, rough rolling of aluminum billets The process employs a two-roll, four-pass rolling technique. S8, aluminum billet precision rolling The rough-rolled billet is continuously rolled in six passes using three rolls to obtain 6013 aluminum alloy wire rods; S9 and 6013 aluminum alloy wire rods are subjected to online atomization quenching. Automatic winding of S10 and 6013 aluminum alloy wire rods; S11 and 6013 aluminum alloy poles are packaged in finished coils.

[0037] Comparative Example 3: Method for producing 6013 aluminum alloy wire using continuous casting and rolling process The method for producing 6013 aluminum alloy wire using continuous casting and rolling process includes the following steps: S1, Aluminum liquid smelting The furnace is filled with molten aluminum with an aluminum content of 99.72% to 99.84% and a cold material ratio of 20% to 30%, and the temperature is controlled at 700℃ to 760℃. S2, aluminum liquid alloying Add 20wt% aluminum-manganese alloy, 20wt% aluminum-chromium alloy, and 15wt% aluminum-silicon alloy to the S1 smelting furnace, along with an upward-drawn oxygen-free copper wire blank. Then add Mg and 10wt% aluminum-titanium alloy to prepare an aluminum liquid with the following weight percentage composition: Si: 0.6%~1.0%, Fe≤0.5%, Cu: 0.6%~1.1%, Mg: 0.8%~1.2%, Mn: 0.2%~0.8%, Cr: 0.03%~0.09%, Ti: 0.02%~0.12%, and other single elements ≤0.05%. S3. In-furnace melt purification treatment The alloy composition and temperature of the melt in the furnace are controlled uniformly as described above. Argon gas and sodium-free refining agent are used for powder spraying refining. The refining time is 15 min to 20 min. After refining, the slag on the surface of the aluminum liquid is removed. S4. Online degassing, refining, and filtration of molten aluminum. The molten aluminum is treated with a dual-chamber, ultra-long-life dual-rotor degassing device, using argon as the degassing medium for online casting purification, ensuring a hydrogen content of less than 0.20 mg / 100 ml. After degassing, AlTi5B1 aluminum titanium boron wire (dual wire addition) is added online to promote grain refinement and optimize phase transformation structure. Three-stage filtration using online ceramic filter plates is then performed to purify the molten aluminum. S5, Continuous casting of molten aluminum The casting process employs a Ф2000mm copper cross-section encased in a 2.0mm thick steel strip to form a crystallization cavity for constant cooling and uniform speed casting on all four sides. The casting speed is 5t / h to 6.5t / h, and the surface fluctuation of the molten aluminum is 0mm to 5mm. S6, Milling the edge of the aluminum billet Milling is performed using a continuous milling machine; S7, Aluminum billet reheating Aluminum billets are reheated using a medium-frequency induction furnace; S8, aluminum billet rough rolling The process employs a two-roll, four-pass rolling technique. S9, aluminum billet precision rolling The rough-rolled billet is continuously rolled in six passes using three rolls to obtain 6013 aluminum alloy wire rods; S10 and 6013 aluminum alloy wire rods are subjected to online atomization quenching. Automatic winding of S11 and 6013 aluminum alloy wire rods; S12 and 6013 aluminum alloy poles are packaged in finished coils.

[0038] The 6013 aluminum alloy wire produced by the continuous casting and rolling process obtained in Example 1 and Comparative Examples 1-3 was subjected to standard testing, and the specific results are shown in Table 1 below. As can be seen from Table 1, the 6013 aluminum alloy wire produced according to the method of Example 1 has stable tensile strength, stable and good elongation, small diameter deviation, and smooth surface quality defects such as no burrs, no cracks, no peeling, and no oxide scale.

[0039] The difference between Comparative Example 1 and Example 1 is that the aluminum billet was not milled using a continuous milling machine after casting. The performance of the 6013 aluminum alloy wire from Comparative Example 1 shows that the final product exhibits obvious peeling and slight cracks.

[0040] The difference between Comparative Example 2 and Example 1 is that the aluminum billet was not reheated in a medium-frequency induction furnace after casting. The performance of the 6013 aluminum alloy wire in Comparative Example 2 shows that the final product exhibits obvious brittle fracture and cracks, resulting in a triangular rod.

[0041] The difference between Comparative Example 3 and Example 1 is that the aluminum lanthanum wire refining agent was replaced with AlTi5B1 aluminum titanium boron wire. The performance of the 6013 aluminum alloy wire in Comparative Example 3 shows that the final product exhibits slight peeling and minor cracks.

[0042] The results of Comparative Examples 1-3 show that: 1. Continuous milling machines can significantly reduce the peeling phenomenon of products; 2. Reheating aluminum billets in medium-frequency induction furnaces can significantly alleviate cracks, brittle fractures, and triangular rod phenomena caused by the rolling process; 3. Composite grain refiners are one of the effective ways to improve the microstructure and enhance the performance of products with complex elemental composition.

[0043] Table 1. Performance of 6013 aluminum alloy wires in Examples 1 and Comparative Examples 1-3

[0044] It will be readily understood by those skilled in the art that the above-described advantageous methods can be freely combined and superimposed without conflict. The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A method for producing 6013 aluminum alloy wire using a continuous casting and rolling process, characterized in that, Includes the following steps: S1. Aluminum molten metal smelting: control the aluminum content to be not less than 99.70%, and control the temperature to be 700℃~760℃; S2, Aluminum Liquid Alloying: Add aluminum-manganese alloy, aluminum-chromium alloy, aluminum-silicon alloy, copper, magnesium, and aluminum-titanium alloy to the aluminum liquid in S1. The composition of the alloyed aluminum liquid is as follows by weight percentage: Si: 0.6%~1.0%, Fe≤0.5%, Cu: 0.6%~1.1%, Mg: 0.8%~1.2%, Mn: 0.2%~0.8%, Cr: 0.03%~0.09%, Ti: 0.02%~0.12%, and other individual elements ≤0.05%. S3. In-furnace melt purification treatment: The alloyed aluminum liquid is refined by powder spraying, and the slag is removed after completion. S4. Online degassing, grain refinement, and filtration of molten aluminum: Online degassing, grain refinement, and filtration of molten aluminum after slag removal; S5. Continuous casting of molten aluminum: The molten aluminum treated by S4 is poured into a crystallizer and continuously cast into aluminum billets. S6. Milling the aluminum billet: The surface of the aluminum billet obtained in S5 is milled to remove the oxide layer; S7. Reheating of aluminum billet: The aluminum billet after milling is homogenized and then reheated. S8. Aluminum billet rough rolling: The reheated aluminum billet is subjected to multiple passes of rough rolling. S9. Finish rolling of aluminum billet: The billet after rough rolling is subjected to multiple passes of finish rolling to obtain aluminum alloy wire rods; S10, Wire rod quenching: Online atomization quenching of the finished wire rod; S11. Winding: Winding the quenched wire rod into a coil.

2. The method according to claim 1, characterized in that, In step S2, an aluminum-manganese alloy containing 20wt% manganese, an aluminum-chromium alloy containing 20wt% chromium, an aluminum-silicon alloy containing 15wt% silicon, and an oxygen-free copper wire blank are added first. After standing for more than 20 minutes, the surface slag is removed, and then metallic magnesium and an aluminum-titanium alloy containing 10wt% titanium are added.

3. The method according to claim 1, characterized in that, In step S4, the online degassing uses a dual-rotor degassing device to reduce the hydrogen content of the molten aluminum to below 0.20 mg / 100ml; the grain refinement is achieved by adding a combination of AlTi5B1 aluminum titanium boron wire and aluminum lanthanum wire as a grain refiner; the filtration uses 40ppi and 60ppi ceramic filter plates installed in the filter box for primary and secondary filtration, and a 25ppi ceramic filter plate installed in the intermediate casting ladle for tertiary filtration.

4. The method according to claim 1, characterized in that, In step S5, the crystallizer is a crystallization cavity composed of a copper liner and a steel strip. During the casting process, the fluctuation of the casting liquid level is controlled at 0mm~5mm, and the casting speed is 5t / h~6.5t / h.

5. The method according to claim 1, characterized in that, In step S6, a continuous milling machine is used for milling.

6. The method according to claim 1, characterized in that, In step S7, the aluminum billet is reheated using a medium-frequency induction furnace.

7. The method according to claim 1, characterized in that, In step S8, the roughing is performed using a two-roll mill in four passes; in step S9, the finishing is performed using a three-roll mill in six consecutive passes.

8. The method according to claim 1, characterized in that, In step S10, the wire rod is quenched using atomized water, and the cooling rate is not less than 100℃ / second.

9. A 6013 aluminum alloy wire prepared by the method according to any one of claims 1 to 8, characterized in that, The 6013 aluminum alloy wire has a smooth surface, free from cracks, burrs, and peeling defects, and the continuous length of a single roll is not less than 5300 meters.

10. The 6013 aluminum alloy wire according to claim 9, characterized in that, The diameter deviation of the 6013 aluminum alloy wire is within ±0.5mm, the tensile strength is 380MPa~440MPa, and the elongation is 5%~8%.

Images