CN109402422B - Aluminum-magnesium-zirconium alloy wire and manufacturing method thereof - Google Patents
Aluminum-magnesium-zirconium alloy wire and manufacturing method thereof Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/131—Wire arc spraying
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Abstract
The invention provides an aluminum magnesium zirconium alloy wire and a manufacturing method thereof, wherein the aluminum magnesium zirconium alloy wire comprises the following chemical components in percentage by mass: zr element content of 0.05-0.15wt.%, Mg element content of 4.5-5.5wt.%, Mn element content of 0.1-0.15wt.%, Cr element content of 0.06-0.12wt.%, Ti element content of 0.05-0.15wt.%, and the balance Al element. The invention adds trace Zr element on the basis of aluminum-magnesium alloy wire (containing Cr, Mn and Ti element) to combine with Al element to form Al3Zr and Al3(Zr, Ti) particles, optionally with Al3The Ti particles are used as heterogeneous nucleation cores, so that the tensile strength and the elongation after breakage of the wire are improved, and the surface hardness uniformity and the surface quality after mechanical scraping of the wire are improved. The hot spraying coating prepared by the wire has the characteristics of compact structure, high bonding strength with a matrix, high surface microhardness, excellent corrosion resistance and the like, particularly has excellent corrosion resistance and wear resistance in a seawater environment, and is suitable for popularization and application.
Description
Technical Field
The invention relates to the technical field of thermal spraying materials, in particular to an aluminum-magnesium-zirconium alloy wire and a manufacturing method thereof.
Background
The seawater pipeline is widely applied to the fields of nuclear power, ships, seawater desalination and the like, seawater is an electrolyte solution with extremely high salinity, the corrosivity is strong, and meanwhile, a large amount of silt is contained in the seawater, so that serious scouring and abrasion and corrosion risks are caused to the seawater pipeline. Practice proves that the thermal spraying alloy coating can provide abrasion and corrosion protection for the steel matrix and prolong the service life of the seawater pipeline. At present, the alloy coating materials used in large quantities at home and abroad include zinc-aluminum, zinc-nickel, aluminum-magnesium, pure aluminum and other wire materials.
The Al-Mg alloy wire is one of the main thermal spraying materials for the abrasion and corrosion protection of steel matrix, is listed in the national standard and is widely applied in engineering. The aluminum-magnesium alloy coating plays double roles of isolation protection and cathode protection for a steel matrix, and Mg plays a role of microalloy strengthening and toughening for the aluminum-magnesium alloy, so that the surface hardness and the bonding strength of the coating can be improved; meanwhile, the self-sealing function of the aluminum magnesium oxide film can improve the corrosion resistance of the coating. In order to improve various performances of aluminum magnesium alloy wires and coatings thereof, the method mainly focuses on the field of rare earth modification in recent years. For example, the Jiangsu middling major front surface engineering technology company Limited invented a rare earth aluminum magnesium alloy wire for thermal spraying, compared with the traditional aluminum magnesium alloy wire, the prepared coating has lower porosity, higher bonding strength with a substrate, better corrosion resistance, and especially has better corrosion resistance in marine environment. Li Chengyu et al adopt the electric arc spraying technique to prepare the aluminum magnesium and rare earth aluminum magnesium coating on the surface of Q235 steel, and tests show that the corrosion resistance of the rare earth aluminum magnesium coating is obviously superior to that of the aluminum magnesium coating.
At present, the modification of the aluminum magnesium coating by the rare earth elements is mainly reflected in the aspect of improving the corrosion resistance, but the improvement of the wear resistance of the coating is limited. The coating on the inner wall of the seawater pipeline needs to have both excellent wear resistance and corrosion resistance, and particularly, the seawater pipeline of a nuclear power station has long service life and bad working conditions, and needs to have long-acting wear resistance and corrosion resistance, which is not possessed by the traditional aluminum-magnesium coating or rare earth aluminum-magnesium coating. Meanwhile, the pure rare earth additive is expensive, easy to burn during smelting addition and thermal spraying, and the rare earth aluminum magnesium coating is not suitable for large-scale engineering application.
The above information is presented merely as background information to aid in understanding the present invention. With respect to the present disclosure, it is not determined whether any of the above is applicable as a prior art of the present invention.
Disclosure of Invention
The invention aims to provide an aluminum-magnesium-zirconium alloy wire suitable for a seawater pipeline inner wall coating and a manufacturing method thereof, so that the seawater pipeline inner wall coating has excellent wear resistance and corrosion resistance.
In order to solve the technical problems, the embodiment of the invention provides an aluminum magnesium zirconium alloy wire, which comprises the following chemical components in percentage by mass:
zr element content 0.05-0.15 wt.%;
mg element content 4.5-5.5 wt.%;
mn element content of 0.1-0.15 wt.%;
the content of Cr element is 0.06-0.12 wt.%;
ti content 0.05-0.15% wt.%;
the balance of Al element.
In one example, the aluminum-magnesium-zirconium alloy wire comprises the following chemical components in percentage by mass:
zr element content 0.1 wt.%;
mg element content 4.5 wt.%;
mn element content 0.12 wt.%;
element Cr content 0.11 wt.%;
ti content 0.1 wt.%;
the Al element content was 95.07 wt.%.
In one example, the aluminum-magnesium-zirconium alloy wire comprises the following chemical components in percentage by mass:
zr element content 0.05 wt.%;
mg element content 5.0 wt.%;
mn element content 0.12 wt.%;
element Cr content 0.11 wt.%;
ti content 0.15 wt.%;
the Al element content was 94.57 wt.%.
In one example, the aluminum-magnesium-zirconium alloy wire comprises the following chemical components in percentage by mass:
zr element content 0.1 wt.%;
mg element content 5.0 wt.%;
mn element content 0.12 wt.%;
element Cr content 0.11 wt.%;
ti content 0.1 wt.%;
the Al element content was 94.57 wt.%.
In one example, the aluminum-magnesium-zirconium alloy wire comprises the following chemical components in percentage by mass:
zr element content 0.15 wt.%;
mg element content 5.0 wt.%;
mn element content 0.12 wt.%;
element Cr content 0.11 wt.%;
ti content 0.05 wt.%;
the Al element content was 94.57 wt.%.
In one example, the aluminum-magnesium-zirconium alloy wire comprises the following chemical components in percentage by mass:
zr element content 0.1 wt.%;
mg element content 5.5 wt.%;
mn element content 0.12 wt.%;
element Cr content 0.11 wt.%;
ti content 0.1 wt.%;
the Al element content was 94.07 wt.%.
The embodiment of the invention also provides a method for manufacturing the aluminum-magnesium-zirconium alloy wire, which comprises the following steps:
s1, selecting a Zr agent with the purity of 75%, a Mn agent with the purity of 75%, a Ti agent with the purity of 75%, a Cr agent with the purity of 75%, an Al ingot with the purity of 99.9% and an Mg ingot, and preparing smelting raw materials according to the mass percentage;
s2, putting the Al ingot into a flame reflection type melting furnace, heating, and controlling the heating temperature to be a preset first temperature so that the Al ingot is completely melted to form Al liquid;
s3, sequentially adding the Mg ingot, the Zr agent, the Mn agent, the Ti agent and the Cr agent into the Al liquid, pressing and immersing until the Mg ingot, the Zr agent, the Mn agent, the Ti agent and the Cr agent are completely melted, standing for a preset first time range, and then stirring a molten pool for a preset second time range to obtain a melt;
s4, removing hydrogen from the melt by adopting a chloride refining-rotary argon blowing composite method, wherein the temperature of the melt is controlled at a preset second temperature;
s5, continuously casting and continuously drawing an aluminum alloy wire blank with a preset first size after slagging off the melt, annealing for a preset first time within a preset first temperature range, then roughly drawing to a preset second size, annealing for a preset second time within a preset second temperature range, and obtaining a finished wire material after multiple times of fine drawing and mechanical scraping.
Wherein the preset first temperature is 760 ℃.
Wherein the preset first time range is 20-30min, and the preset second time range is 7-15 min.
Wherein the preset second temperature is 740 ℃.
In the step S4, the rotating speed for removing hydrogen from the melt by adopting a chloride refining-rotary argon blowing composite method is 350r/min, the argon flow is 1.5L/S, and the argon blowing time is 10 min.
In step S5, the preset first size is Φ 8.0mm, the preset first temperature range is 400-.
The embodiment of the invention has the following beneficial effects:
1. the aluminum-magnesium-zirconium alloy wire material provided by the embodiment of the invention has the advantages of excellent comprehensive mechanical property, excellent processing property and lower cost, and is suitable for large-scale production and engineering application.
2. The aluminum-magnesium-zirconium wire material prepared by the embodiment of the invention is used for preparing the thermal spraying coating, the coating has compact structure, low porosity, high bonding strength with a substrate, high surface hardness and excellent corrosion resistance, and can meet the performance requirements of long-term wear resistance and corrosion resistance of seawater pipelines.
3. The aluminum-magnesium-zirconium alloy wire provided by the embodiment of the invention solves the problem of poor processing performance of the traditional aluminum-magnesium alloy wire, and the hot spraying coating prepared by adopting the wire provided by the embodiment of the invention improves the comprehensive performance of the traditional aluminum-magnesium coating.
4. In the embodiment of the invention, Zr element is adopted to carry out microalloying modification on the aluminum-magnesium alloy wire and the thermal spraying coating thereof, compared with rare earth element modification, the performance-to-cost ratio is higher, and the coating not only retains excellent corrosion resistance, but also greatly enhances the wear resistance of the coating.
In addition, other advantageous effects not described in detail will be further apparent hereinafter.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic surface topography of two coatings before etching according to one embodiment of the present invention.
FIG. 2 is a graph showing the bonding strength and microhardness of the two coatings according to the first embodiment of the present invention.
Fig. 3 is a schematic view of the surface topography of two coatings after the seawater immersion corrosion test in the first embodiment of the invention. Fig. 4 is a schematic diagram of a relationship curve between self-corrosion potential and time of two coatings in the seawater immersion corrosion process in the first embodiment of the present invention.
FIG. 5 is a schematic view of the surface micro-topography of two coatings after the neutral salt spray corrosion test in the first embodiment of the present invention.
FIG. 6 is a flowchart of a method for manufacturing an Al-Mg-Zr alloy wire according to a second embodiment of the present invention.
Detailed Description
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.
The embodiment of the invention provides an aluminum magnesium zirconium alloy wire, which comprises the following chemical components in percentage by mass:
zr element content 0.05-0.15 wt.%;
mg element content 4.5-5.5 wt.%;
mn element content of 0.1-0.15 wt.%;
the content of Cr element is 0.06-0.12 wt.%;
ti content 0.05-0.15% wt.%;
the balance of Al element.
In the embodiment, the inventor finds that the Zr element has special chemical characteristics, and has a great effect of improving the mechanical property and the corrosion resistance of the aluminum alloy material in metallurgy. In the research on the modification of the aluminum-magnesium coating, Zr is used for replacing expensive rare earth elements, so that excellent corrosion resistance can be obtained; meanwhile, the wear resistance of the coating can be improved, and the seawater pipeline steel matrix can be effectively protected from scouring wear and corrosion of seawater. In addition, Cr, Mn and Ti are added into the aluminum-magnesium alloy for alloying treatment, so that coating particles can be further refined, and the wear resistance and corrosion resistance of the coating are improved.
Specifically, based on the above mixture ratio, the aluminum-magnesium-zirconium alloy wire material of the first embodiment has excellent comprehensive performance, good processing performance and high cost performance; the hot spraying coating prepared by the wire has compact structure, low porosity, high bonding strength and microhardness and excellent corrosion resistance, is suitable for being used as a hot spraying coating of a seawater pipeline, and can prolong the service life of the seawater pipeline.
The chemical composition ratios of some preferred examples are shown in table 1 below (unit: wt.%).
| Composition ratio | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Aluminum Al | 95.07 | 94.57 | 94.57 | 94.57 | 94.07 |
| Magnesium Mg | 4.5 | 5.0 | 5.0 | 5.0 | 5.5 |
| Zr of zirconium | 0.1 | 0.05 | 0.1 | 0.15 | 0.1 |
| Titanium Ti | 0.1 | 0.15 | 0.1 | 0.05 | 0.1 |
| Mn manganese | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 |
| Chromium Cr | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 |
TABLE 1
The alloy wires listed in the table have the combined modification effect of the added Zr element and the Ti element on the basis of the conventional alloy elements of Ti, Cr and Mn, so that the processing performance of the wires is optimized, and the size, tolerance, mechanical property and surface property of the alloy wires can meet the requirements of the current national standard according to the detection of the project specified by the national standard GB/T12608-2003.
The existing electric arc spraying technology is adopted, the wires (phi 2.0mm) of the examples listed in the table above are selected, the preparation of the thermal spraying coating is carried out on the surface of the carbon steel treated by corundum sand blasting, the thickness of the coating is 200 +/-20 mu m, and the hole sealing treatment is not carried out. The electric arc spraying voltage is 35V, the current is 155-175A,
the spraying distance is 150mm, and the air pressure is 0.6 MPa. Observing the microstructure of the coating, and determining the bonding strength, microhardness, porosity and corrosion resistance of the coating, wherein the test result shows that: the coating has compact structure, fine particles, 24 +/-2 MPa of bonding strength, 28 +/-2 HV of microhardness, porosity lower than 2.5 percent, unchanged appearance of the coating after 120d seawater immersion test, no corrosion product and no corrosion after 1920h neutral salt spray corrosion test.
Referring to fig. 1-5, the advantages of the products of the examples of the present invention were analyzed by comparing the structure and properties of the conventional al-mg coating with those of the al-mg-zr coating of the examples of the present invention.
Fig. 1 shows the surface structure and appearance of the conventional al-mg coating and the al-mg-zr coating according to the embodiment of the present invention before corrosion, and the surface structure and performance of the al-mg-zr coating are greatly improved, specifically, the structure is dense, the particles are fine, the porosity is low, the wear resistance of the coating can be effectively enhanced, and the invasion of corrosive media can be effectively prevented.
Wherein, fig. 2 shows the bonding strength and the surface micro-hardness of the two coatings and the substrate, and the bonding strength and the surface micro-hardness of the aluminum-magnesium-zirconium coating are obviously improved compared with the traditional aluminum-magnesium coating.
Wherein, fig. 3 and fig. 5 are the micro-morphologies of the two coatings after seawater immersion corrosion and neutral salt spray corrosion, respectively, and both advantageously illustrate the excellent corrosion resistance of the al-mg-zr coating according to the embodiment of the present invention.
Wherein, fig. 4 is a relation curve of the self-corrosion potential E and the time T of the two coatings in the seawater immersion corrosion process, and the self-corrosion potential of the al-mg-zr coating in the embodiment of the present invention is more positive than that of the conventional al-mg coating, which qualitatively illustrates that the passive film is formed more densely and the corrosion is more difficult to occur in the corrosion process of the al-mg-zr coating.
As shown in FIG. 6, an embodiment of the present invention further provides a method of manufacturing the Al-Mg-Zr alloy wire of the first embodiment, the method including the steps of:
s1, selecting a Zr agent with the purity of 75%, a Mn agent with the purity of 75%, a Ti agent with the purity of 75%, a Cr agent with the purity of 75%, an Al ingot with the purity of 99.9% and an Mg ingot, and preparing smelting raw materials according to the mass percentage;
s2, putting the Al ingot into a flame reflection type melting furnace, heating, and controlling the heating temperature to be a preset first temperature so that the Al ingot is completely melted to form Al liquid;
s3, sequentially adding the Mg ingot, the Zr agent, the Mn agent, the Ti agent and the Cr agent into the Al liquid, pressing and immersing until the Mg ingot, the Zr agent, the Mn agent, the Ti agent and the Cr agent are completely melted, standing for a preset first time range, and then stirring a molten pool for a preset second time range to obtain a melt;
s4, removing hydrogen from the melt by adopting a chloride refining-rotary argon blowing composite method, wherein the temperature of the melt is controlled at a preset second temperature;
s5, continuously casting and continuously drawing an aluminum alloy wire blank with a preset first size after slagging off the melt, annealing for a preset first time within a preset first temperature range, then roughly drawing to a preset second size, annealing for a preset second time within a preset second temperature range, and obtaining a finished wire material after multiple times of fine drawing and mechanical scraping.
In one embodiment, the preset first temperature is 760 ℃.
In an embodiment, the preset first time range is 20-30min, and the preset second time range is 7-15 min.
In one embodiment, the predetermined second temperature is 740 ℃.
In one embodiment, the rotation speed of the step S4 for removing hydrogen from the melt by using the chloride refining-rotary argon blowing composite method is 350r/min, the flow rate of argon is 1.5L/S, and the argon blowing time is 10 min.
In an embodiment, in step S5, the preset first size is Φ 8.0mm, the preset first temperature range is 400-.
Based on the first and second embodiments of the invention, specifically, the embodiment of the invention combines Al element with trace Zr element to form Al on the basis of aluminum-magnesium alloy wire (containing Cr, Mn and Ti elements)3Zr and Al3(Zr, Ti) particles, optionally with Al3Ti particles are used as heterogeneous nucleation cores, so that the heterogeneous nucleation capability is improved, the as-cast alloy grain structure of the wire is refined, the tensile strength and the elongation after breakage of the wire are improved, and the surface hardness uniformity and the surface quality after mechanical scraping of the wire are improved. The addition of Zr in the embodiment of the invention improves the comprehensive performance of the aluminum magnesium alloy wire and improves the processing performance of the wire.
The aluminum-magnesium-zirconium alloy wire prepared by the embodiment of the invention is used for preparing the thermal spraying coating by the existing electric arc spraying technology, the surface tension of aluminum-magnesium molten drops is reduced due to the existence of Zr element in the coating, particles are atomized to be finer in the thermal spraying process, and the effective contact area between coating particles and between the coating and a substrate is increased; meanwhile, Zr element and Ti element in the coating are used as the modification inoculant of the aluminum-magnesium alloy, and coating particles are refined. The Zr element modifies the aluminum-magnesium coating, improves the tight combination degree of the coating and the matrix, reduces the porosity of the coating, and enhances the surface hardness of the coating, thereby improving the seawater scouring and abrasion resistance of the coating. Meanwhile, the compact structure and low porosity of the aluminum-magnesium-zirconium alloy coating cuts off a seawater corrosion channel, so that the surface of the coating shows stable self-sealing capability; in addition, Zr is a corrosion-resistant element, which not only can improve the compactness of the Al2O3 oxide film, but also can form a passive film to enable the coating to have a passive region. The Zr element modifies the aluminum-magnesium coating, so that the seawater corrosion resistance of the coating is improved.
As can be seen from the above description of the embodiments, the embodiments of the present invention have the following advantages:
the aluminum-magnesium-zirconium alloy wire material disclosed by the embodiment of the invention has the advantages of good comprehensive performance, excellent processing performance, simple preparation process and high quality of the alloy wire material; the hot spraying coating prepared by the method has compact structure, low porosity, high surface hardness, high bonding strength with a substrate and excellent corrosion resistance, particularly has excellent corrosion resistance in a seawater corrosion environment, and can be used for wear protection and corrosion protection of a seawater pipeline and service life extension of the seawater pipeline. The Zr element and other alloy elements added in the embodiment of the invention have moderate price and less dosage, and are suitable for engineering application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (6)
1. The aluminum magnesium zirconium alloy wire is characterized by comprising the following chemical components in percentage by mass:
zr element content 0.1 wt.%;
mg element content 4.5 wt.%;
mn element content 0.12 wt.%;
element Cr content 0.11 wt.%;
ti content 0.1 wt.%;
the Al element content was 95.07 wt.%.
2. The aluminum magnesium zirconium alloy wire is characterized by comprising the following chemical components in percentage by mass:
zr element content 0.05 wt.%;
mg element content 5.0 wt.%;
mn element content 0.12 wt.%;
element Cr content 0.11 wt.%;
ti content 0.15 wt.%;
the Al element content was 94.57 wt.%.
3. The aluminum magnesium zirconium alloy wire is characterized by comprising the following chemical components in percentage by mass:
zr element content 0.1 wt.%;
mg element content 5.0 wt.%;
mn element content 0.12 wt.%;
element Cr content 0.11 wt.%;
ti content 0.1 wt.%;
the Al element content was 94.57 wt.%.
4. The aluminum magnesium zirconium alloy wire is characterized by comprising the following chemical components in percentage by mass:
zr element content 0.15 wt.%;
mg element content 5.0 wt.%;
mn element content 0.12 wt.%;
element Cr content 0.11 wt.%;
ti content 0.05 wt.%;
the Al element content was 94.57 wt.%.
5. The aluminum magnesium zirconium alloy wire is characterized by comprising the following chemical components in percentage by mass:
zr element content 0.1 wt.%;
mg element content 5.5 wt.%;
mn element content 0.12 wt.%;
element Cr content 0.11 wt.%;
ti content 0.1 wt.%;
the Al element content was 94.07 wt.%.
6. A method of making an Al-Mg-Zr alloy wire as claimed in any one of claims 1 to 5, comprising the steps of:
s1, selecting a Zr agent with the purity of 75%, a Mn agent with the purity of 75%, a Ti agent with the purity of 75%, a Cr agent with the purity of 75%, an Al ingot with the purity of 99.9% and an Mg ingot, and preparing smelting raw materials according to the mass percentage;
step S2, putting the Al ingot into a flame reflection type melting furnace, heating, and controlling the heating temperature to be a preset first temperature so that the Al ingot is completely melted to form Al liquid; the preset first temperature is 760 ℃;
s3, sequentially putting the Mg ingot, the Zr agent, the Mn agent, the Ti agent and the Cr agent into the Al liquid, pressing and immersing until the Mg ingot, the Zr agent, the Mn agent, the Ti agent and the Cr agent are completely melted, standing for a preset first time range, and then stirring a molten pool for a preset second time range to obtain a melt; the preset first time range is 20-30min, and the preset second time range is 7-15 min;
step S4, removing hydrogen from the melt by a chloride refining-rotary argon blowing composite method, wherein the rotating speed of removing hydrogen from the melt is 350r/min, the argon flow is 1.5L/S, and the argon blowing time is 10 min; controlling the temperature of the melt at a preset second temperature; the preset second temperature is 740 ℃;
step S5, continuously casting and continuously drawing an aluminum alloy wire blank with a preset first size after slagging off the melt, annealing for a preset first time within a preset first temperature range, then roughly drawing to a preset second size, annealing for a preset second time within a preset second temperature range, and obtaining a finished wire material after multiple times of fine drawing and mechanical scraping; wherein the preset first size is phi 8.0mm, the preset first temperature range is 400-.
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