CN115418518A - Mixed gas protection-based refining and modification integrated smelting method for ZM5 alloy - Google Patents
Mixed gas protection-based refining and modification integrated smelting method for ZM5 alloy 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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C22C23/00—Alloys based on magnesium
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Abstract
The invention relates to a ZM5 alloy refining and modification integrated smelting method based on mixed gas protection, and belongs to the technical field of magnesium alloy smelting. The method comprises the steps of sequentially adding a scrap returns, pure magnesium ingots and pure aluminum ingots into a preheated melting furnace, introducing mixed protective gas into the melting furnace for melting, adding an aluminum-manganese intermediate alloy and pure zinc ingots after the materials are completely melted, continuously heating to 740-750 ℃, automatically finishing refining and modifying treatment on a ZM5 alloy melt according to set parameters by using a refining and modifying all-in-one machine with refining and modifying mixed gas, cooling to a pouring temperature after the treatment is finished, and slagging off and pouring. The open-chain is aimed at precisely controlling the protective refining deterioration of ZM5 alloy in smelting process by adopting two mixed gases with different components and a treatment method in the smelting process of the ZM5 alloy, and the refining and modification processes are integrally and synchronously completed, no solvent is added in the whole dissolving and refining process, and the pollution of the solvent to the environment and the alloy is avoided.
Description
Technical Field
The invention belongs to the technical field of magnesium alloy smelting, and particularly relates to a ZM5 alloy refining and modification integrated smelting method based on mixed gas protection.
Background
The ZM5 alloy belongs to Mg-AI magnesium alloy, has good heat treatment solid solution strengthening effect because the solubility of aluminum in an alpha solid solution is reduced along with the reduction of temperature, is widely applied to the industrial fields of automobiles, aviation, aerospace and the like, and is the most commonly applied alloy in the magnesium alloy at present. Because the ZM5 alloy has wide crystallization temperature range, the solute is redistributed due to unbalanced solidification under the casting condition, the solidification crystallization range is further enlarged to be at most 180 ℃, the added body has large shrinkage and low thermal conductivity, and the solidification characteristics of the ZM5 alloy cause the solidification crystallization to have obvious post-grain coarsening phenomenon, and the defects of shrinkage porosity, cracks and the like are easily generated on the crystalline structure. The ZM5 alloy can effectively alleviate or eliminate the defects by modification treatment, providing heterogeneous crystal nuclei for solidification and refining the crystal structure. Currently, the most used method for the modification of ZM5 alloys is modification with magnesite and hexachloroethane. The magnesite modification is influenced by the quality difference of magnesite and operation factors, the modification effect is unstable, and even the modification effect is poor and the structure is thick, so that the whole furnace material is scrapped; the hexachloroethane has the dual effects of deterioration and degassing refining, but harmful gases such as generated chlorine gas and the like seriously pollute practitioners, the atmospheric environment and equipment workshops. The ZM5 alloy is smelted by adopting a solvent mixed by chlorine salt and fluorine salt for protective refining, so that the pollution to the environment and the alloy is serious, and the produced parts are prematurely failed due to slag inclusion of the flux.
Disclosure of Invention
In view of the above, the invention aims to provide an integrated smelting method for a ZM5 alloy based on mixed gas protection, refining and modification. The method adopts the refining and modification mixed gas to integrally and accurately control the refining and modification of the ZM5 alloy; mixed protective gas is adopted to prevent the oxidation combustion of the ZM5 alloy melt; the melting process is free from adding a flux, so that solvent-free melting is realized, the pollution of the solvent to the environment and the alloy is avoided, and the method is an environment-friendly clean melting method.
In order to achieve the aim, the invention provides a ZM5 alloy smelting method based on mixed gas refining and modification integration, which comprises the following steps: (1) heating a resistance type crucible smelting furnace to 500-600 ℃, sequentially adding preheated ZM5 alloy foundry returns, pure magnesium ingots and pure aluminum ingots, covering a mixed gas protective cover, and connecting a pipeline filled with mixed protective gas with the protective cover, wherein the mixed protective gas is sulfur hexafluoride gas and argon gas, and the volume ratio of the mixed protective gas to the pure aluminum ingot is 1: (20 to 30), setting the flow rate of the mixed protective gas to be 10 to 15L/min, and electrifying to heat up for melting;
(2) when the temperature of the melt reaches 710 to 720 ℃, adding the aluminum-manganese intermediate alloy and the pure zinc ingot, and continuing heating and melting;
(3) when the temperature of the melt reaches 740 to 750 ℃, a slag ladle is used for beating clean oxidation slag on the surface of the melt, and the refining and modification all-in-one machine is adjusted to enable the stirring rod to be positioned at the center of the crucible; and the height of the stirring rod is adjusted;
(4) communicating a pipeline filled with refining and modifying mixed gas with a refining and modifying all-in-one machine interface, setting the flow of the refining and modifying mixed gas, the rotating speed of a stirring rod and the stirring time, adjusting the flow of mixed protective gas, starting the refining and modifying all-in-one machine, and refining and modifying the melt; the refining and modification mixed gas is argon and carbon dioxide, and the volume ratio of the argon to the carbon dioxide is 1:1, the flow of the refining and modifying mixed gas is 15 to 20L/min; the rotation speed of a stirring rod is 200 to 250r/min, the stirring time is 20 to 25min, and the stirring temperature is 740 to 750 ℃; the flow rate of the mixed protective gas is 40-60L/min;
(5) after the treatment is finished, removing the refining and modification all-in-one machine, slagging off, standing, adjusting the flow of mixed protective gas to be 20 to 25L/min, adjusting the temperature of the ZM5 alloy melt to the pouring temperature, and pouring a chemical composition sample and a fracture sample before a furnace; the standing time is 8-10min, and the standing temperature is 735-745 ℃; the casting temperature is 715 to 725 ℃;
(6) analyzing chemical components, checking the fracture in front of the furnace, and casting after meeting the requirement.
Preferably, the purity of sulfur hexafluoride is more than or equal to 99.9 percent, and the purity of argon is more than or equal to 99.99 percent.
The refining and modifying all-in-one machine has the functions of adjusting the gas flow, the rotating speed of the stirring rod, the height of the stirring rod, the stirring time and the like. Further preferably, the purity of argon is more than or equal to 99.99 percent, and the purity of carbon dioxide is more than or equal to 99.9 percent.
Preferably, the preheating is carried out at 150 to 250 ℃ for 1 to 2 hours.
Preferably, the gas protection cover is formed by welding a stainless steel plate and a stainless steel pipe, and holes with the diameter of 2mm are drilled on the stainless steel pipe and are used for connecting a mixed protection gas pipeline.
Preferably, the composition of the ZM5 alloy scrap returns meets the requirements of GB/T1177 or HB7780, and the surface is clean and pollution-free.
Further preferably, the addition amount of the returned materials accounts for 30-50% of the total charging amount. Preferably, the magnesium content of the pure magnesium ingot is more than or equal to 99.95, the aluminum content of the pure aluminum ingot is more than or equal to 99.85, the zinc content of the pure zinc ingot is more than or equal to 99.90, and the manganese content of the aluminum-manganese intermediate alloy is 10%.
Preferably, the stirring rod is made of stainless steel, a through hole with the diameter of 10mm is formed in the center of the stirring rod and used for introducing refining and deterioration mixed gas, threads are machined in the upper end of the stirring rod and connected with the refining and deterioration integrated machine, a stirring head is machined in the lower end of the stirring rod and is of a disc-shaped structure, and holes communicated with the axial through holes are radially formed in discs. Further preferably, the height of the stirring rod is 150 to 200mm from the lower end face of the stirring rod to the bottom of the crucible. Preferably, the chemical composition meets the requirements of GB/T1177 or HB 7780; preferably, the fracture tissue should be fine, uniform and free of slag inclusions.
The invention has the beneficial effects that: (1) argon and carbon dioxide gas are mixed according to the proportion of 1:1 is mixed into refining and modification mixed gas in a volume ratio and is used for treating a ZM5 alloy melt, so that the refining and modification are completed at one time, and the operation process is simplified; (2) the refining and modification treatment of the ZM5 alloy melt is automatically completed by adjusting the control parameters of the refining and modification integrated machine, so that the influence of operation factors is avoided, and the precise control of the refining and modification process is realized; (3) the optimized stirring rod shape structure and the refining modification treatment parameters enable refining modified mixed gas to generate floating small bubbles under the rotation action of the stirring rod, so that the contact area with the ZM5 alloy melt is increased, and the refining modification effect is effectively improved; (4) no solvent is added in the smelting process, so that the solvent-free smelting is realized, the alloy melt and the environment are not polluted, and the environment-friendly clean smelting is realized; (5) the metallurgical quality of the ZM5 alloy solution smelted by the smelting method reaches the requirements of national standard and navigation standard, and the method has wide application prospect. (6) The smelting method can be popularized to the smelting of A1-Mg-Zn alloy.
Drawings
FIG. 1 is a schematic view of a mixed shielding gas protection cover according to the present invention;
FIG. 2 is a schematic view of the presently open switch operating lever;
FIG. 3 is a photograph of a furnace front fracture in example 1;
FIG. 4 is a photograph of a furnace front fracture in example 2;
FIG. 5 is a photograph of a furnace front fracture in example 3;
FIG. 6 is a photograph of a forward fracture of a comparative example.
Detailed Description
For the purpose of making the objects, aspects and advantages of the present invention more apparent, there is described in detail preferred embodiments of the present invention with reference to the accompanying drawings, wherein: according to the requirements of GB/T1177 or HB7780 standard, the ZM5 alloy comprises the following chemical components: al:7.5 to 9.0%, zn:0.2 to 0.8%, mn:0.15 to 0.5 percent; less than or equal to 0.25 percent of Si, less than or equal to 0.1 percent of Cu, less than or equal to 0.08 percent of Fe, less than or equal to 0.01 percent of Ni, less than or equal to 0.002 percent of Be, less than or equal to 0.002 percent of Zr, and the balance of Mg. The present invention will be further described with reference to the following examples.
Example 1
According to the standard requirements, taking a new material, adding a returned material, adding Al:7.5 to 7.7%, zn:0.7 to 0.8%, mn:0.4 to 0.5 percent, and the balance of Mg.
(1) The furnace burden treatment comprises the steps of weighing pure magnesium ingots with the content of more than or equal to 99.95, pure aluminum ingots with the content of more than or equal to 99.85, pure zinc ingots with the content of more than or equal to 99.90, aluminum-manganese alloy with the manganese content of 10 percent and ZM5 alloy scrap returns according to a proportion, removing surface pollution, carrying out sand blasting, and then baking at 150 ℃ for 2 hours;
(2) preheating a crucible, cleaning the crucible, and heating to 500 ℃;
(3) charging, namely adding preheated magnesium ingots, aluminum ingots and foundry returns into a furnace in sequence, and covering a mixed gas protective cover;
(4) and (3) introducing and melting mixed protective gas, wherein the volume ratio of the mixed protective gas is as follows: argon gas: sulfur hexafluoride =20:1, electrifying to melt, wherein the flow is 15L/min;
(5) adding furnace charge, and adding preheated aluminum-manganese intermediate alloy and zinc ingot when the temperature of the melt reaches 710 ℃;
(6) in the refining and modifying treatment, when the temperature of the melt reaches 740 ℃, a refining and modifying mixed gas pipe orifice is connected with an interface of a refining and modifying integrated machine; adjusting the refining and modifying integrated machine to enable the center of the stirring rod to be aligned with the center of the crucible; adjusting the height of the stirring rod to ensure that the distance between the lower end surface of the stirring rod and the bottom of the crucible is 150mm; adjusting the flow of the mixed protective gas to be 40L/min; setting the flow of the refining and modification mixed gas to be 15L/min, wherein the volume ratio of the refining and modification mixed gas is argon: carbon dioxide =1:1, starting a refining and modifying integrated machine at a rotating speed of a stirring rod of 200r/min and stirring time of 25min, and performing refining and modifying treatment;
(7) after the standing refining modification treatment is finished, removing the refining modification treatment integrated machine for slag melting, and beating the oxidizing slag on the surface of the melt by using a slag beating spoon; adjusting the flow rate of the mixed protective gas to be 20L/min, and standing for 8min at 735 ℃;
(8) when the temperature is lowered to 715 ℃, the oxidizing slag on the surface of the melt is beaten by a slag beating spoon, and a chemical component sample block and a furnace front fracture sample block are cast;
(9) the chemical composition analysis was performed by a direct-reading spectrometer (model ARL 3460) for composition analysis and fracture inspection, and the results were Al:7.61%, zn:0.73%, mn:0.48 percent of Si, less than or equal to 0.25 percent of Cu, less than or equal to 0.1 percent of Fe, less than or equal to 0.08 percent of Ni, less than or equal to 0.01 percent of Be, less than or equal to 0.002 percent of Zr and less than or equal to 0.002 percent of Zr. Furnace front fractures, see fig. 3.
Example 2
According to the standard requirements, the new material is added in a proportion of 60%, the returned material is added in a proportion of 40%, and the materials are proportioned according to the proportion of 8.0-8.1% of Al, 0.4-0.5% of Zn0.2-0.3% of Mn and the balance of Mg.
(1) The furnace burden treatment comprises the steps of weighing pure magnesium ingots with the content of more than or equal to 99.95, pure aluminum ingots with the content of more than or equal to 99.85, pure zinc ingots with the content of more than or equal to 99.90 and aluminum-manganese alloy with the manganese content of 10 percent and ZM5 alloy scrap returns according to a proportion, removing surface pollution, carrying out sand blasting, and then baking for 1.5hr at the temperature of 200 ℃;
(2) preheating a crucible, cleaning the crucible, and heating to 550 ℃;
(3) charging, namely adding preheated magnesium ingots, aluminum ingots and foundry returns into a furnace in sequence, and covering a mixed gas protective cover;
(4) and (3) introducing and melting mixed protective gas, wherein the volume ratio of the mixed protective gas is as follows: argon gas: sulfur hexafluoride =25:1, electrifying to melt at the flow rate of 12L/min;
(5) adding furnace charge, and adding preheated aluminum-manganese intermediate alloy and zinc ingot when the melt temperature reaches 715 ℃;
(6) in the refining and modification treatment, when the temperature of the melt reaches 745 ℃, a refining and modification mixed gas pipe orifice is connected with an interface of a refining and modification all-in-one machine; adjusting the position of the refining and modification all-in-one machine to enable the center of the stirring rod to be aligned with the center of the crucible; adjusting the height of the stirring rod to ensure that the distance between the lower end surface of the stirring rod and the crucible bottom is 175mm; adjusting the flow of mixed protective gas to be 50L/min, setting the flow of refined and modified mixed gas to be 18L/min, wherein the volume ratio of the refined and modified mixed gas is argon: carbon dioxide =1:1, starting a refining and modifying integrated machine to carry out refining and modifying treatment, wherein the rotating speed of a stirring rod is 220r/min, the stirring time is 22 min;
(7) after the standing, refining and modifying treatment is finished, hoisting the refining and modifying treatment integrated machine to melt slag, and beating the oxidizing slag on the surface of the melt by using a slag beating spoon; adjusting the flow rate of the mixed protective gas to 22L/min, standing at 740 ℃ for 9min,
(8) when the temperature is reduced to 720 ℃, the oxidizing slag on the surface of the melt is beaten by a slag beating spoon, and a chemical component sample block and a furnace front fracture sample block are cast;
(9) the chemical composition analysis was performed by a direct-reading spectrometer (model ARL) for composition analysis and fracture inspection, and the results were Al:8.08%, zn:0.47%, mn:0.28 percent of Si is less than or equal to 0.25 percent, cu is less than or equal to 0.1 percent, fe is less than or equal to 0.08 percent, ni is less than or equal to 0.01 percent, be is less than or equal to 0.002 percent, and Zr is less than or equal to 0.002 percent. The furnace front cut is shown in figure 4.
Example 3
According to the standard requirements, the new material is taken to be added in a proportion of 50%, the returned material is added in a proportion of 50%, and the materials are proportioned according to the proportion of 8.9-9.0% of Al, 0.2-0.3% of Zn0.17-0.2% of Mn0.17-0.2% of Mg and the balance of Mg.
(1) The furnace burden treatment comprises the steps of weighing pure magnesium ingots with the content of more than or equal to 99.95, pure aluminum ingots with the content of more than or equal to 99.85, pure zinc ingots with the content of more than or equal to 99.90 and aluminum-manganese alloy with the manganese content of 10 percent and ZM5 alloy scrap returns according to a proportion, removing surface pollution, carrying out sand blasting, and then baking for 1hr at the temperature of 250 ℃;
(2) preheating a crucible, cleaning the crucible, and heating to 600 ℃;
(3) charging, namely adding preheated magnesium ingots, aluminum ingots and foundry returns into a furnace in sequence, and covering a mixed gas protective cover;
(4) and (3) introducing and melting mixed protective gas, wherein the volume ratio of the mixed protective gas is as follows: argon gas: sulfur hexafluoride =30:1, electrifying to melt, wherein the flow is 10L/min;
(5) adding furnace burden, and adding preheated aluminum-manganese intermediate alloy and zinc ingot when the melt temperature reaches 720 ℃;
(6) in the refining and modification treatment, when the temperature of the melt reaches 750 ℃, a refining and modification mixed gas pipe orifice is connected with an interface of a refining and modification integrated machine; adjusting the position of the refining and modification all-in-one machine to enable the center of the stirring rod to be aligned with the center of the crucible; adjusting the height of the stirring rod to ensure that the distance between the lower end surface of the stirring rod and the crucible bottom is 200mm; adjusting the flow of mixed protective gas to be 60L/min, setting the flow of the refining and modifying mixed gas to be 20L/min, wherein the volume ratio of the refining and modifying mixed gas is argon: carbon dioxide =1:1, starting a refining and modifying integrated machine at a rotating speed of 250r/min and a stirring time of 20min, and performing refining and modifying treatment;
(7) after the standing refining modification treatment is finished, removing the refining modification treatment integrated machine for slag melting, and beating the oxidizing slag on the surface of the melt by using a slag beating spoon; adjusting the flow rate of the mixed protective gas to be 25L/min, and standing for 10min at 745 ℃;
(8) when the temperature is reduced to 725 ℃, a slag spoon is used for beating the oxidizing slag on the surface of the melt, and a chemical component sample block and a furnace front fracture sample block are cast;
(9) component analysis and fracture inspection a direct-reading spectrometer (model ARL 3460) was used to analyze the chemical components, and the results were Al:8.95%, zn:0.26%, mn:0.19 percent, less than or equal to 0.25 percent of Si, less than or equal to 0.1 percent of Cu, less than or equal to 0.08 percent of Fe, less than or equal to 0.01 percent of Ni, less than or equal to 0.002 percent of Be and less than or equal to 0.002 percent of Zr. The furnace front cut is shown in figure 5.
Comparative example
Basically the same as the smelting method of the embodiment 2, except that no refining modification treatment is carried out during the smelting of the ZM5 alloy. The pouring fracture specimen is shown in fig. 6.
Macro fracture contrast
Compared with the fracture of the comparative example, the fracture of the examples 1 to 3 is fine and compact in structure, no slag is contained on the surface of the fracture, the fracture of the comparative example has tiny cracks and small amount of slag is distributed, and refining and deterioration are not carried out in the smelting process.
Grain size detection
The average sizes of the crystal grains of the examples 1 to 3 and the comparative example are detected by a wire loading method, and the result shows that the average diameter of the crystal grains of the example 1 is 92 micrometers, the average diameter of the crystal grains of the example 2 is 89 micrometers, the average diameter of the crystal grains of the example 3 is 96 micrometers, the average diameter of the crystal grains of the comparative example is 195 micrometers, and the effect of the example 2 is the best.
Compared with the prior art, the ZM5 alloy refining and deterioration removing integrated smelting method based on mixed gas protection has the following advantages: (1) in the process of smelting the ZM5 alloy, argon and carbon dioxide are mixed into refining and modification mixed gas, so that the refining and modification processes are completed at one time, and the operation process is simplified; (2) the refining and modification treatment is automatically completed by utilizing the refining and modification integration according to preset process parameters, so that the influence of operation factors is avoided, and the precise control of the refining and modification process is realized; (3) setting refining and modifying parameters, controlling the refining and modifying integrated machine to treat the ZM5 alloy melt, crushing refining and modifying bubbles, generating floating small bubbles, increasing the contact area with the ZM5 alloy melt, and effectively improving the refining and modifying effect; (4) no solvent is added in the smelting process, so that the solvent-free smelting is realized, the alloy melt and the environment are not polluted, and the environment-friendly clean smelting is realized; (5) the metallurgical quality of the ZM5 alloy solution smelted by the smelting method meets the requirements of national standards and navigation standards, and has wide application prospect. (6) The smelting method can be popularized to the smelting of A1-Mg-Zn alloy.
Claims (9)
1. A ZM5 alloy refining and modification integrated smelting method based on mixed gas protection is characterized by comprising the following steps: (1) heating a resistance type crucible smelting furnace to 500-600 ℃, sequentially adding preheated ZM5 alloy foundry returns, pure magnesium ingots and pure aluminum ingots, covering a mixed gas protective cover, and connecting a pipeline filled with mixed protective gas with the protective cover, wherein the mixed protective gas is sulfur hexafluoride gas and argon gas, and the volume ratio of the mixed protective gas to the pure aluminum ingot is 1: (20 to 30), setting the flow rate of the mixed protective gas to be 10 to 15L/min, and electrifying to heat up for melting;
(2) when the temperature of the melt reaches 710 to 720 ℃, adding the aluminum-manganese intermediate alloy and pure zinc to split, and continuing to heat and melt;
(3) when the temperature of the melt reaches 740 to 750 ℃, a slag ladle is used for beating clean oxidation slag on the surface of the melt, and the refining and modification all-in-one machine is adjusted to enable the stirring rod to be positioned at the center of the crucible; and adjusting the height of the stirring rod;
(4) communicating a pipeline filled with refining and modifying mixed gas with a refining and modifying all-in-one machine interface, setting the flow of the refining and modifying mixed gas, the rotating speed of a stirring rod and the stirring time, adjusting the flow of mixed protective gas, starting the refining and modifying all-in-one machine, and refining and modifying the melt; the refining and modification mixed gas is argon and carbon dioxide, and the volume ratio of the argon to the carbon dioxide is 1:1, the flow rate of refined and modified mixed gas is 15 to 20L/min; the rotation speed of a stirring rod is 200 to 250r/min, the stirring time is 20 to 25min, and the stirring temperature is 740 to 750 ℃; the flow rate of the mixed protective gas is 40 to 60L/min;
(5) after the treatment is finished, moving the refining and modification all-in-one machine away, slagging off, standing, adjusting the flow of mixed protective gas to be 20 to 25L/min, adjusting the temperature of the ZM5 alloy melt to the pouring temperature, and pouring a chemical component sample and a fracture sample in front of a furnace; the standing time is 8-10min, and the standing temperature is 735-745 ℃; the casting temperature is 715 to 725 ℃;
(6) analyzing chemical components, checking a furnace front fracture, and pouring after meeting the requirement.
2. The ZM5 alloy smelting process based on the protection of mixed gas, refining and modification integration as claimed in claim 1, wherein the purity of sulfur hexafluoride is not less than 99.9%, and the purity of argon is not less than 99.99%.
3. The ZM5 alloy smelting method based on the integration of mixed gas protection, refining and modification as set forth in claim 1, wherein the purity of argon in the refining and modification mixed gas is not less than 99.99%, and the purity of carbon dioxide in the refining and modification mixed gas is not less than 99.9%.
4. The ZM5 alloy smelting method based on mixed gas shielded refining and modification integration as claimed in claim 1, wherein the preheating in step (1) is carried out at 150 to 250 ℃ for 1 to 2 hours.
5. The ZM5 alloy smelting process based on mixed gas shielded refining and modification integration as claimed in claim 1, wherein the mixed gas protective cover is formed by welding stainless steel tube with stainless steel plate, and the stainless steel tube is drilled with small holes with diameter of 2mm to make the mixed gas uniformly dispersed and flow out.
6. The ZM5 alloy refining and modification integrated smelting method based on mixed gas protection as claimed in claim 1, wherein the components of the returned materials of the ZM5 alloy meet the requirements of GB/T1177 or HB7780, the surface is clean and pollution-free, and the added amount of the returned materials accounts for 30-50% of the total amount of the charged furnace.
7. The ZM5 alloy smelting process based on the protection of mixed gas, refining and modification integration as claimed in claim 1, wherein the magnesium content of the pure magnesium ingot is not less than 99.95%, the aluminum content of the pure aluminum ingot is not less than 99.85%, the zinc content of the pure zinc ingot is not less than 99.90%, and the manganese content of the aluminum-manganese intermediate alloy is 10% by mass.
8. The ZM5 alloy refining and modifying integrated smelting method based on mixed gas protection as claimed in claim 1, wherein the height of the stirring rod of the refining and modifying integrated machine is 150 to 200mm from the bottom of the crucible to the lower end surface of the stirring rod.
9. The ZM5 alloy smelting process based on the integration of refining and modifying under the protection of mixed gas as defined in claim 8, wherein the stirring rod is made of stainless steel, the center of the stirring rod is provided with a through hole with a diameter of 10mm along the axial direction, the upper end of the stirring rod is provided with a thread and is connected with the refining and modifying integrated machine, the lower end of the stirring rod is provided with a disk-shaped stirring head, and the stirring head is provided with a hole along the radial direction and is communicated with the axial through hole.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115418518B (en) | 2023-09-08 |
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