CN113774257B - Short-process production process of aluminum-silicon-magnesium cast aluminum alloy - Google Patents
Short-process production process of aluminum-silicon-magnesium cast aluminum alloy Download PDFInfo
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- CN113774257B CN113774257B CN202110985498.1A CN202110985498A CN113774257B CN 113774257 B CN113774257 B CN 113774257B CN 202110985498 A CN202110985498 A CN 202110985498A CN 113774257 B CN113774257 B CN 113774257B
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C22C1/00—Making non-ferrous alloys
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Abstract
The invention relates to the technical field of casting aluminum alloy, and discloses a short-process production process of aluminum-silicon-magnesium series casting aluminum alloy, which comprises aluminum-silicon-magnesium series alloy, wherein the aluminum-silicon-magnesium series alloy comprises aluminum alloy, a refining agent and a deslagging agent; the aluminum alloy comprises the following raw materials in parts by weight: silicon: 6.5-7.5 parts of magnesium: 0.2-0.25 part of titanium: 0.1-0.2 part of iron: 0.5-0.6 part of manganese: 0.01-0.05 part of copper: 0.25-0.3 part of zinc: 0.2-0.35 part of nickel: 0.1-0.2 part of zirconium: 0.2-0.3 part of aluminum and the balance; the refining agent comprises the following raw materials in parts by weight: sodium chloride: 25-30 parts of sodium fluosilicate: 20-25 parts of calcium oxide: 1-1.5 parts of sodium fluoride: 2.5-3 parts of silicon dioxide: 1-2 parts of sodium oxide: 0.2-0.5 part of bismuth: 0.1-0.5 part of indium: 0.5-1 part. According to the invention, residues in the aluminum alloy are conveniently removed, and when residues in the aluminum alloy are cleaned, the oxide slag on the surface of the aluminum alloy is cleaned, so that the influence of the residues on the surface of the alloy on the quality of the aluminum alloy is avoided, the flow of aluminum alloy treatment is reduced, and the effect of improving the processing efficiency is achieved.
Description
Technical Field
The invention relates to the technical field of cast aluminum alloy, in particular to a short-process production process of aluminum-silicon-magnesium cast aluminum alloy.
Background
The cast aluminum alloy is an aluminum alloy obtained by filling a mold with a molten metal to obtain a blank of a part having various shapes. Has the advantages of low density, higher specific strength, good corrosion resistance and casting manufacturability, small limit by the structural design of parts, and the like. Medium strength alloys based on Al-Si and Al-Si-Mg-Cu are divided; high strength alloys based on Al-Cu; al-Mg based corrosion resistant alloys; al-Re based heat-resistant alloys. Most of the heat treatments are needed to achieve the purposes of strengthening the alloy, eliminating internal stress of the casting, stabilizing the structure and the size of the part, etc. The device is used for manufacturing beams, turbine blades, pump bodies, hanging frames, hubs, air inlet lips, engine casings and the like. The method is also used for manufacturing parts such as a cylinder cover, a gearbox and a piston of an automobile, a shell of an instrument and a booster pump body and the like.
In the existing aluminum alloy casting technology in the market at present, aluminum alloy is usually melted firstly, then deslagging agent and refining agent are added into melted aluminum alloy solution, residues are generated after deslagging agent and refining agent are mixed with the aluminum alloy solution, then residues in the aluminum alloy are taken out, when residues in the aluminum alloy solution are taken out, the aluminum alloy solution can be contacted with air, so that oxide slag is generated by contact of the surface of the aluminum alloy solution with oxygen, the quality of the aluminum alloy is reduced, the follow-up steps are needed to process the oxide slag on the aluminum alloy solution, and the process is too complicated.
Therefore, we propose a short-flow production process of aluminum-silicon-magnesium cast aluminum alloy.
Disclosure of Invention
The invention mainly solves the technical problems existing in the prior art and provides a short-flow production process of aluminum-silicon-magnesium cast aluminum alloy.
In order to achieve the above purpose, the invention adopts the following technical scheme that the short-process production process of the aluminum-silicon-magnesium cast aluminum alloy comprises the following steps of: the aluminum-silicon-magnesium alloy comprises an aluminum alloy, a refining agent and a deslagging agent;
the aluminum alloy comprises the following raw materials in parts by weight:
silicon: 6.5-7.5 parts of magnesium: 0.2-0.25 part of titanium: 0.1-0.2 part of iron: 0.5-0.6 part of manganese: 0.01-0.05 part of copper: 0.25-0.3 part of zinc: 0.2-0.35 part of nickel: 0.1-0.2 part of zirconium: 0.2-0.3 part of aluminum and the balance;
the refining agent comprises the following raw materials in parts by weight:
sodium chloride: 25-30 parts of sodium fluosilicate: 20-25 parts of calcium oxide: 1-1.5 parts of sodium fluoride: 2.5-3 parts of silicon dioxide: 1-2 parts of sodium oxide: 0.2-0.5 part of bismuth: 0.1-0.5 part of indium: 0.5-1 part;
the deslagging agent comprises the following raw materials in parts by weight:
sodium sulfate: 30-40 parts of sodium chloride: 20-25 parts of sodium fluosilicate: 15-20 parts of potassium chloride: 5-8 parts of calcium dioxide: 2-3 parts of sodium aluminate: 1-1.5 parts of sodium fluoride: 0.1-0.5 part, sodium: 0.1-0.3 part of potassium fluoride: 0.1-0.2 part;
the production process comprises the following working steps:
the first step: mixing the balance of silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum according to a certain proportion, and heating the crucible to 700-750 ℃ for 15 minutes;
and a second step of: mixing sodium chloride, sodium fluosilicate, calcium oxide, sodium fluoride, silicon dioxide, sodium oxide, bismuth and indium according to a proportion to prepare a refining agent, and mixing sodium sulfate, sodium chloride, sodium fluosilicate, potassium chloride, calcium dioxide, sodium aluminate, sodium fluoride, sodium and potassium fluoride according to a proportion to prepare a deslagging agent;
and a third step of: pouring the mixed silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum into a preheated crucible, pouring the mixed refining agent and deslagging agent in the second step into the crucible, and raising the temperature of the crucible to 750-780 ℃ and preserving the temperature for 30 minutes;
fourth step: cleaning impurities on a furnace mouth by using an air gun, and cleaning oxide slag on the surface of the alloy by using a net made of clean stainless steel;
fifth step: stirring the aluminum liquid in the crucible to fully mix the refining agent and the deslagging agent with the aluminum liquid;
sixth step: salvaging the inside of the aluminum liquid through a net made of stainless steel, and cleaning residues in the aluminum liquid;
seventh step: pouring aluminum liquid into the pressure kettle, pouring the aluminum liquid into the mold rapidly, closing the mold, opening the air inlet valve for 10 minutes, closing the air valve, opening the mold, and performing the next treatment.
Preferably, the first step is heated to a temperature at which the crucible appears dark red.
Preferably, in the fourth step, the residue generated in the third step due to the addition of the refining agent and the deslagging agent is cleaned.
Preferably, in the fifth step, insulating cotton is spread on the surface of the crucible.
Preferably, in the sixth step, the aluminum alloy melt is left to stand for 15 minutes.
Preferably, in the seventh step, the air pressure in the mold is increased to 0.5 mpa.
Advantageous effects
The invention provides a short-process production process of aluminum-silicon-magnesium cast aluminum alloy. The beneficial effects are as follows:
(1) According to the short-process production process of the aluminum-silicon-magnesium cast aluminum alloy, the refining agent and the deslagging agent are added in the process of smelting the aluminum alloy, so that residues in the aluminum alloy are conveniently removed, meanwhile, when residues in the aluminum alloy are cleaned, the oxidizing slag on the surface of the aluminum alloy is cleaned, the influence of the residues on the surface of the alloy on the quality of the aluminum alloy is avoided, the process of processing the aluminum alloy is reduced, and the effect of improving the processing efficiency is achieved.
(2) After the residues in the crucible are treated, the aluminum alloy melt is stirred through a stainless steel net, so that the mixing degree of the refining agent, the deslagging agent and the aluminum alloy melt is improved, and the cleaning effect of the refining agent and the deslagging agent is improved.
(3) According to the short-process production process of the aluminum-silicon-magnesium cast aluminum alloy, when stirring is carried out, the surface of the crucible is covered with the heat-insulating cotton, so that the condition that the aluminum alloy melt contacts with oxygen and the oxidizing slag is generated again on the surface of the aluminum alloy melt is avoided.
(4) According to the short-process production process of the aluminum-silicon-magnesium cast aluminum alloy, after secondary treatment is carried out on the inside of the aluminum alloy, the aluminum alloy melt is kept stand for 15 minutes, so that the temperature in the aluminum alloy is stabilized, the later treatment is convenient, and the effect of improving the processing speed is achieved.
(5) According to the short-process production process of the aluminum-silicon-magnesium cast aluminum alloy, the aluminum alloy melt is poured into the pressure kettle, the aluminum alloy melt is poured into the die through the pressure kettle, after pouring is finished, air pressure is injected into the die, the air pressure is maintained at 0.5 megaPa, the tightness of the die is better, meanwhile, after the air valve is closed, the air pressure does not exist in the die, so that a worker can conveniently open the die, and the effect of reducing the labor intensity of the worker is achieved.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one: a short-process production process of aluminum-silicon-magnesium series cast aluminum alloy comprises aluminum-silicon-magnesium series alloy, wherein the aluminum-silicon-magnesium series alloy comprises aluminum alloy, refining agent and deslagging agent.
The aluminum alloy comprises the following raw materials in parts by weight:
silicon (Si): 6.5-7.5 parts of magnesium (Mg): 0.2-0.25 part of titanium (Ti): 0.1-0.2 part, iron (Fe): 0.5-0.6 part of manganese (Mn): 0.01-0.05 part of copper (Cu): 0.25-0.3 part of zinc (Zn): 0.2-0.35 parts of nickel (Ni): 0.1-0.2 part of zirconium (Zr): 0.2-0.3 parts, and the balance of aluminum (Al).
The refining agent comprises the following raw materials in parts by weight:
sodium chloride (NaCl): 25-30 parts of sodium fluosilicate (Na 2SiF 6): 20-25 parts of calcium oxide (CaO): 1-1.5 parts of sodium fluoride (NaF): 2.5-3 parts of silicon dioxide (SiO 2): 1-2 parts of sodium oxide (Na 2O): 0.2-0.5 part of bismuth (Bi): 0.1-0.5 part, indium (In): 0.5-1 part.
The deslagging agent comprises the following raw materials in parts by weight:
sodium sulfate (Na 2SO 4): 30-40 parts of sodium chloride (NaCL): 20-25 parts of sodium fluosilicate (Na 2SiF 6): 15-20 parts of potassium chloride (KCl): 5-8 parts of calcium dioxide (CaF 2): 2-3 parts of sodium aluminate (NaAl): 1-1.5 parts of sodium fluoride (NaF): 0.1-0.5 part, sodium (Na): 0.1-0.3 part of potassium fluoride (KF): 0.1-0.2 parts.
The production process comprises the following working steps:
the first step: mixing the rest of silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum according to a certain proportion, heating the crucible to 700-750 ℃ for 15 minutes until the crucible turns dark red, removing water in the crucible, and simultaneously preheating the crucible.
And a second step of: sodium chloride, sodium fluosilicate, calcium oxide, sodium fluoride, silicon dioxide, sodium oxide, bismuth and indium are mixed according to the proportion to prepare a refining agent, and then sodium sulfate, sodium chloride, sodium fluosilicate, potassium chloride, calcium dioxide, sodium aluminate, sodium fluoride, sodium and potassium fluoride are mixed according to the proportion to prepare the deslagging agent.
And a third step of: pouring the mixed silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum into a preheated crucible, heating the silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum through the crucible, pouring the mixed refining agent and deslagging agent in the second step into the crucible, raising the temperature of the crucible to 750-780 ℃, and preserving the temperature for 30 minutes.
Fourth step: the impurities on the furnace mouth are cleaned by using an air gun, then the oxide slag on the surface of the alloy is cleaned by using a net made of clean stainless steel, and residues generated by adding a refining agent and a deslagging agent in the third step are cleaned.
Fifth step: stirring the aluminum liquid in the crucible to fully mix the refining agent and the deslagging agent with the aluminum liquid, and paving heat preservation cotton on the surface of the crucible to avoid contact oxidation of the aluminum liquid and oxygen.
Sixth step: salvaging the inside of the aluminum liquid through a net made of stainless steel, cleaning residues in the aluminum liquid, and standing the aluminum alloy melt for 15 minutes.
Seventh step: pouring aluminum liquid into a pressure kettle, pouring the aluminum liquid into a mould rapidly, closing the mould, opening an air inlet valve to enable the air pressure in the mould to rise to 0.5 megapascal, and continuing for 10 minutes, closing the air valve, opening the mould, and carrying out the next treatment.
Embodiment two: a short-process production process of aluminum-silicon-magnesium series cast aluminum alloy comprises aluminum-silicon-magnesium series alloy, wherein the aluminum-silicon-magnesium series alloy comprises aluminum alloy, refining agent and deslagging agent.
The aluminum alloy comprises the following raw materials in parts by weight:
silicon (Si): 7 parts of magnesium (Mg): 0.2-0.25 part of titanium (Ti): 0.1-0.2 part, iron (Fe): 0.5-0.6 part of manganese (Mn): 0.01-0.05 part of copper (Cu): 0.25-0.3 part of zinc (Zn): 0.2-0.35 parts of nickel (Ni): 0.1-0.2 part of zirconium (Zr): 0.2-0.3 parts, and the balance of aluminum (Al).
The refining agent comprises the following raw materials in parts by weight:
sodium chloride (NaCl): 28 parts of sodium fluosilicate (Na 2SiF 6): 20-25 parts of calcium oxide (CaO): 1-1.5 parts of sodium fluoride (NaF): 2.5-3 parts of silicon dioxide (SiO 2): 1-2 parts of sodium oxide (Na 2O): 0.2-0.5 part of bismuth (Bi): 0.1-0.5 part, indium (In): 0.5-1 part.
The deslagging agent comprises the following raw materials in parts by weight:
sodium sulfate (Na 2SO 4): 35 parts of sodium chloride (NaCL): 20-25 parts of sodium fluosilicate (Na 2SiF 6): 15-20 parts of potassium chloride (KCl): 5-8 parts of calcium dioxide (CaF 2): 2-3 parts of sodium aluminate (NaAl): 1-1.5 parts of sodium fluoride (NaF): 0.1-0.5 part, sodium (Na): 0.1-0.3 part of potassium fluoride (KF): 0.1-0.2 parts.
The production process comprises the following working steps:
the first step: mixing the rest of silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum according to a certain proportion, heating the crucible to 720 ℃ for 15 minutes until the crucible turns dark red, removing water in the crucible, and simultaneously preheating the crucible.
And a second step of: sodium chloride, sodium fluosilicate, calcium oxide, sodium fluoride, silicon dioxide, sodium oxide, bismuth and indium are mixed according to the proportion to prepare a refining agent, and then sodium sulfate, sodium chloride, sodium fluosilicate, potassium chloride, calcium dioxide, sodium aluminate, sodium fluoride, sodium and potassium fluoride are mixed according to the proportion to prepare the deslagging agent.
And a third step of: pouring the mixed silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum into a preheated crucible, heating the silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum through the crucible, pouring the mixed refining agent and deslagging agent in the second step into the crucible, raising the temperature of the crucible to 750-780 ℃, and preserving the temperature for 30 minutes.
Fourth step: the impurities on the furnace mouth are cleaned by using an air gun, then the oxide slag on the surface of the alloy is cleaned by using a net made of clean stainless steel, and residues generated by adding a refining agent and a deslagging agent in the third step are cleaned.
Fifth step: stirring the aluminum liquid in the crucible to fully mix the refining agent and the deslagging agent with the aluminum liquid, and paving heat preservation cotton on the surface of the crucible to avoid contact oxidation of the aluminum liquid and oxygen.
Sixth step: salvaging the inside of the aluminum liquid through a net made of stainless steel, cleaning residues in the aluminum liquid, and standing the aluminum alloy melt for 15 minutes.
Seventh step: pouring aluminum liquid into a pressure kettle, pouring the aluminum liquid into a mould rapidly, closing the mould, opening an air inlet valve to enable the air pressure in the mould to rise to 0.5 megapascal, and continuing for 10 minutes, closing the air valve, opening the mould, and carrying out the next treatment.
Embodiment III: a short-process production process of aluminum-silicon-magnesium series cast aluminum alloy comprises aluminum-silicon-magnesium series alloy, wherein the aluminum-silicon-magnesium series alloy comprises aluminum alloy, refining agent and deslagging agent.
The aluminum alloy comprises the following raw materials in parts by weight:
silicon (Si): 6.5-7.5 parts of magnesium (Mg): 0.25 part of titanium (Ti): 0.1-0.2 part, iron (Fe): 0.5-0.6 part of manganese (Mn): 0.01-0.05 part of copper (Cu): 0.25-0.3 part of zinc (Zn): 0.2-0.35 parts of nickel (Ni): 0.1-0.2 part of zirconium (Zr): 0.2-0.3 parts, and the balance of aluminum (Al).
The refining agent comprises the following raw materials in parts by weight:
sodium chloride (NaCl): 25-30 parts of sodium fluosilicate (Na 2SiF 6): 23 parts of calcium oxide (CaO): 1-1.5 parts of sodium fluoride (NaF): 2.5-3 parts of silicon dioxide (SiO 2): 1-2 parts of sodium oxide (Na 2O): 0.2-0.5 part of bismuth (Bi): 0.1-0.5 part, indium (In): 0.5-1 part.
The deslagging agent comprises the following raw materials in parts by weight:
sodium sulfate (Na 2SO 4): 30-40 parts of sodium chloride (NaCL): 20-25 parts of sodium fluosilicate (Na 2SiF 6): 18 parts of potassium chloride (KCl): 5-8 parts of calcium dioxide (CaF 2): 2-3 parts of sodium aluminate (NaAl): 1-1.5 parts of sodium fluoride (NaF): 0.1-0.5 part, sodium (Na): 0.1-0.3 part of potassium fluoride (KF): 0.1-0.2 parts.
The production process comprises the following working steps:
the first step: mixing the rest of silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum according to a certain proportion, heating the crucible to 700-750 ℃ for 15 minutes until the crucible turns dark red, removing water in the crucible, and simultaneously preheating the crucible.
And a second step of: sodium chloride, sodium fluosilicate, calcium oxide, sodium fluoride, silicon dioxide, sodium oxide, bismuth and indium are mixed according to the proportion to prepare a refining agent, and then sodium sulfate, sodium chloride, sodium fluosilicate, potassium chloride, calcium dioxide, sodium aluminate, sodium fluoride, sodium and potassium fluoride are mixed according to the proportion to prepare the deslagging agent.
And a third step of: pouring the mixed silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum into a preheated crucible, heating the silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum through the crucible, pouring the mixed refining agent and deslagging agent in the second step into the crucible, raising the temperature of the crucible to 770 ℃, and preserving the temperature for 30 minutes.
Fourth step: the impurities on the furnace mouth are cleaned by using an air gun, then the oxide slag on the surface of the alloy is cleaned by using a net made of clean stainless steel, and residues generated by adding a refining agent and a deslagging agent in the third step are cleaned.
Fifth step: stirring the aluminum liquid in the crucible to fully mix the refining agent and the deslagging agent with the aluminum liquid, and paving heat preservation cotton on the surface of the crucible to avoid contact oxidation of the aluminum liquid and oxygen.
Sixth step: salvaging the inside of the aluminum liquid through a net made of stainless steel, cleaning residues in the aluminum liquid, and standing the aluminum alloy melt for 15 minutes.
Seventh step: pouring aluminum liquid into a pressure kettle, pouring the aluminum liquid into a mould rapidly, closing the mould, opening an air inlet valve to enable the air pressure in the mould to rise to 0.5 megapascal, and continuing for 10 minutes, closing the air valve, opening the mould, and carrying out the next treatment.
Embodiment four: a short-process production process of aluminum-silicon-magnesium series cast aluminum alloy comprises aluminum-silicon-magnesium series alloy, wherein the aluminum-silicon-magnesium series alloy comprises aluminum alloy, refining agent and deslagging agent.
The aluminum alloy comprises the following raw materials in parts by weight:
silicon (Si): 6.5-7.5 parts of magnesium (Mg): 0.2-0.25 part of titanium (Ti): 0.1-0.2 part, iron (Fe): 0.55 parts of manganese (Mn): 0.01-0.05 part of copper (Cu): 0.25-0.3 part of zinc (Zn): 0.2-0.35 parts of nickel (Ni): 0.1-0.2 part of zirconium (Zr): 0.2-0.3 parts, and the balance of aluminum (Al).
The refining agent comprises the following raw materials in parts by weight:
sodium chloride (NaCl): 25-30 parts of sodium fluosilicate (Na 2SiF 6): 20-25 parts of calcium oxide (CaO): 1.25 parts of sodium fluoride (NaF): 2.5-3 parts of silicon dioxide (SiO 2): 1-2 parts of sodium oxide (Na 2O): 0.2-0.5 part of bismuth (Bi): 0.1-0.5 part, indium (In): 0.5-1 part.
The deslagging agent comprises the following raw materials in parts by weight:
sodium sulfate (Na 2SO 4): 30-40 parts of sodium chloride (NaCL): 20-25 parts of sodium fluosilicate (Na 2SiF 6): 15-20 parts of potassium chloride (KCl): 6.5 parts of calcium dioxide (CaF 2): 2-3 parts of sodium aluminate (NaAl): 1-1.5 parts of sodium fluoride (NaF): 0.1-0.5 part, sodium (Na): 0.1-0.3 part of potassium fluoride (KF): 0.1-0.2 parts.
The production process comprises the following working steps:
the first step: mixing the rest of silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum according to a certain proportion, heating the crucible to 740 ℃ for 15 minutes until the crucible turns dark red, removing water in the crucible, and simultaneously preheating the crucible.
And a second step of: sodium chloride, sodium fluosilicate, calcium oxide, sodium fluoride, silicon dioxide, sodium oxide, bismuth and indium are mixed according to the proportion to prepare a refining agent, and then sodium sulfate, sodium chloride, sodium fluosilicate, potassium chloride, calcium dioxide, sodium aluminate, sodium fluoride, sodium and potassium fluoride are mixed according to the proportion to prepare the deslagging agent.
And a third step of: pouring the mixed silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum into a preheated crucible, heating the silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum through the crucible, pouring the mixed refining agent and deslagging agent in the second step into the crucible, raising the temperature of the crucible to 750 ℃, and preserving the temperature for 30 minutes.
Fourth step: the impurities on the furnace mouth are cleaned by using an air gun, then the oxide slag on the surface of the alloy is cleaned by using a net made of clean stainless steel, and residues generated by adding a refining agent and a deslagging agent in the third step are cleaned.
Fifth step: stirring the aluminum liquid in the crucible to fully mix the refining agent and the deslagging agent with the aluminum liquid, and paving heat preservation cotton on the surface of the crucible to avoid contact oxidation of the aluminum liquid and oxygen.
Sixth step: salvaging the inside of the aluminum liquid through a net made of stainless steel, cleaning residues in the aluminum liquid, and standing the aluminum alloy melt for 15 minutes.
Seventh step: pouring aluminum liquid into a pressure kettle, pouring the aluminum liquid into a mould rapidly, closing the mould, opening an air inlet valve to enable the air pressure in the mould to rise to 0.5 megapascal, and continuing for 10 minutes, closing the air valve, opening the mould, and carrying out the next treatment.
The working principle of the invention is as follows:
according to the invention, the refining agent and the deslagging agent are added in the process of smelting the aluminum alloy, so that residues in the aluminum alloy are conveniently removed, and meanwhile, when residues in the aluminum alloy are cleaned, the oxidized slag on the surface of the aluminum alloy is cleaned, so that the influence of the residues on the surface of the alloy on the quality of the aluminum alloy is avoided, and the flow of aluminum alloy treatment is reduced; after the residues in the crucible are treated, stirring the aluminum alloy melt through a stainless steel net, so that the mixing degree of the refining agent and the deslagging agent and the aluminum alloy melt is improved, and the cleaning effect of the refining agent and the deslagging agent is improved; when stirring, the surface of the crucible is covered with heat preservation cotton, so that the condition that the aluminum alloy melt contacts with oxygen and oxide slag is generated again on the surface of the aluminum alloy melt is avoided; after secondary treatment is carried out on the inside of the aluminum alloy, standing the aluminum alloy melt for 15 minutes, so that the temperature of the inside of the aluminum alloy is stabilized, and the later treatment is convenient; through pouring aluminum alloy melt into autoclave, pour into the mould with aluminum alloy melt through autoclave in, after the pouring finishes, pour into atmospheric pressure into the mould inside, make atmospheric pressure maintain at 0.5 megaPa, make the inside leakproofness of mould better, simultaneously, after closing the pneumatic valve, the inside atmospheric pressure that does not have of mould, make things convenient for the staff to open the mould.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A short-process production process of aluminum-silicon-magnesium series cast aluminum alloy comprises the steps of: the aluminum-silicon-magnesium alloy comprises an aluminum alloy, a refining agent and a deslagging agent;
the aluminum alloy comprises the following raw materials in parts by weight:
silicon: 6.5-7.5 parts of magnesium: 0.2-0.25 part of titanium: 0.1-0.2 part of iron: 0.5-0.6 part of manganese: 0.01-0.05 part of copper: 0.25-0.3 part of zinc: 0.2-0.35 part of nickel: 0.1-0.2 part of zirconium: 0.2-0.3 part of aluminum and the balance;
the refining agent comprises the following raw materials in parts by weight:
sodium chloride: 25-30 parts of sodium fluosilicate: 20-25 parts of calcium oxide: 1-1.5 parts of sodium fluoride: 2.5-3 parts of silicon dioxide: 1-2 parts of sodium oxide: 0.2-0.5 part of bismuth: 0.1-0.5 part of indium: 0.5-1 part;
the deslagging agent comprises the following raw materials in parts by weight:
sodium sulfate: 30-40 parts of sodium chloride: 20-25 parts of sodium fluosilicate: 15-20 parts of potassium chloride: 5-8 parts of calcium dioxide: 2-3 parts of sodium aluminate: 1-1.5 parts of sodium fluoride: 0.1-0.5 part, sodium: 0.1-0.3 part of potassium fluoride: 0.1-0.2 part;
the production process comprises the following working steps:
the first step: mixing the balance of silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum according to a certain proportion, and heating the crucible to 700-750 ℃ for 15 minutes;
and a second step of: mixing sodium chloride, sodium fluosilicate, calcium oxide, sodium fluoride, silicon dioxide, sodium oxide, bismuth and indium according to a proportion to prepare a refining agent, and mixing sodium sulfate, sodium chloride, sodium fluosilicate, potassium chloride, calcium dioxide, sodium aluminate, sodium fluoride, sodium and potassium fluoride according to a proportion to prepare a deslagging agent;
and a third step of: pouring the mixed silicon, magnesium, titanium, iron, manganese, copper, zinc, nickel, zirconium and aluminum into a preheated crucible, pouring the mixed refining agent and deslagging agent in the second step into the crucible, and raising the temperature of the crucible to 750-780 ℃ and preserving the temperature for 30 minutes;
fourth step: cleaning impurities on a furnace mouth by using an air gun, and cleaning oxide slag on the surface of the alloy by using a net made of clean stainless steel;
fifth step: stirring the aluminum liquid in the crucible to fully mix the refining agent and the deslagging agent with the aluminum liquid;
sixth step: salvaging the inside of the aluminum liquid through a net made of stainless steel, and cleaning residues in the aluminum liquid;
seventh step: pouring aluminum liquid into the pressure kettle, pouring the aluminum liquid into the mold rapidly, closing the mold, opening the air inlet valve for 10 minutes, closing the air valve, opening the mold, and performing the next treatment.
2. The short-process production process of aluminum-silicon-magnesium series cast aluminum alloy according to claim 1, wherein the short-process production process is characterized in that: the first step is to heat the crucible to a dark red color.
3. The short-process production process of aluminum-silicon-magnesium series cast aluminum alloy according to claim 1, wherein the short-process production process is characterized in that: and in the fourth step, residues generated by adding the refining agent and the deslagging agent in the third step are cleaned.
4. The short-process production process of aluminum-silicon-magnesium series cast aluminum alloy according to claim 1, wherein the short-process production process is characterized in that: and in the fifth step, insulating cotton is paved on the surface of the crucible.
5. The short-process production process of aluminum-silicon-magnesium series cast aluminum alloy according to claim 1, wherein the short-process production process is characterized in that: and in the sixth step, standing the aluminum alloy melt for 15 minutes.
6. The short-process production process of aluminum-silicon-magnesium series cast aluminum alloy according to claim 1, wherein the short-process production process is characterized in that: in the seventh step, the air pressure in the mold was raised to 0.5 mpa.
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