CN114855031A - Technological method for casting and rolling novel aluminum-magnesium-silicon alloy - Google Patents
Technological method for casting and rolling novel aluminum-magnesium-silicon alloy Download PDFInfo
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- CN114855031A CN114855031A CN202210384381.2A CN202210384381A CN114855031A CN 114855031 A CN114855031 A CN 114855031A CN 202210384381 A CN202210384381 A CN 202210384381A CN 114855031 A CN114855031 A CN 114855031A
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- 229910000676 Si alloy Inorganic materials 0.000 title claims abstract description 123
- -1 aluminum-magnesium-silicon Chemical compound 0.000 title claims abstract description 122
- 238000005266 casting Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000005096 rolling process Methods 0.000 title claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 27
- 238000000465 moulding Methods 0.000 claims abstract description 24
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 18
- 239000000956 alloy Substances 0.000 claims abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000007797 corrosion Effects 0.000 claims abstract description 12
- 238000005260 corrosion Methods 0.000 claims abstract description 12
- 239000002893 slag Substances 0.000 claims abstract description 12
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 230000003647 oxidation Effects 0.000 claims abstract description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 229910021365 Al-Mg-Si alloy Inorganic materials 0.000 claims description 46
- 238000005554 pickling Methods 0.000 claims description 16
- 239000003112 inhibitor Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000006068 polycondensation reaction Methods 0.000 claims description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 5
- 238000010309 melting process Methods 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 239000006172 buffering agent Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 229910017464 nitrogen compound Inorganic materials 0.000 claims description 3
- 150000002830 nitrogen compounds Chemical class 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 150000003464 sulfur compounds Chemical class 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MKPXGEVFQSIKGE-UHFFFAOYSA-N [Mg].[Si] Chemical compound [Mg].[Si] MKPXGEVFQSIKGE-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910001068 laves phase Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/003—Rolling non-ferrous metals immediately subsequent to continuous casting, i.e. in-line rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/18—Finishing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
-
- C—CHEMISTRY; METALLURGY
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
-
- C—CHEMISTRY; METALLURGY
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
Abstract
The invention relates to the technical field of alloy casting, and discloses a process method for casting and rolling a novel aluminum-magnesium-silicon alloy, which comprises the steps of filling the aluminum-magnesium-silicon alloy into a molding tool, gradually reducing the temperature of the aluminum-magnesium-silicon alloy, and modifying the detail shape by using a file or a carving knife in a matching way, thereby achieving the purpose of molding and core making of the aluminum-magnesium-silicon alloy, immersing the aluminum-magnesium-silicon alloy into an aqueous solution containing sulfuric acid, carrying out oxidation treatment on the surface of the aluminum-magnesium-silicon alloy when black slag on the surface of the aluminum-magnesium-silicon alloy needs to be eliminated, thereby effectively treating the black slag on the surface of the aluminum-magnesium-silicon alloy, finally carrying out cold continuous rolling after removing oxide skin on the molded aluminum-magnesium-silicon alloy through acid washing, and carrying out continuous rolling on the aluminum-magnesium-silicon alloy under the mutual extrusion among rollers, thereby improving the tensile strength and toughness of the aluminum-magnesium-silicon alloy, meanwhile, the corrosion resistance of the aluminum-magnesium-silicon alloy is improved.
Description
Technical Field
The invention relates to the technical field of alloy casting, in particular to a process method for casting and rolling a novel aluminum-magnesium-silicon alloy.
Background
The alloy is a solid product with metal property obtained by mixing and melting one metal and another metal or nonmetal, cooling and solidifying, is macroscopically uniform, contains a plurality of chemical substances of metal elements and generally has metal characteristics. Any element can be used as the alloy element, but a large amount of metal is still added. The most basic, independent substances that make up an alloy are called components, or simply elements. An alloy composed of two components is called a binary alloy, an alloy composed of three components is called a ternary alloy, and an alloy composed of three or more components is called a multicomponent alloy. In the solid state, the alloy may be a single phase or a mixture of multiple phases; may be in a crystalline state, or may be in a quasicrystalline state or an amorphous state. Depending on the difference in atomic radius, electronegativity, electron concentration, and the like of the constituent elements in the crystalline alloy, there may occur a phase such as a solid solution maintaining the same structure as the pure element of the substrate and an intermediate phase not having the same structure as any constituent element, including a normal valence compound, an electron compound, a laves phase, a sigma phase, a gap phase, a complex structure gap compound, and the like. The phases of the alloy that may occur in the equilibrium state can be known from the phase equilibrium diagram.
The existing novel process method for casting and rolling the aluminum-magnesium-silicon alloy has the disadvantages of complicated process and high cost, and the cast and rolled aluminum-magnesium-silicon alloy has poor tensile strength and toughness, so that the quality of the aluminum-magnesium-silicon alloy is low.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a process method for casting and rolling a novel aluminum-magnesium-silicon alloy, which has the advantages of strong tensile strength and toughness and the like and solves the problem of low quality of the magnesium-silicon alloy.
(II) technical scheme
In order to achieve the purpose of strong tensile strength and toughness, the invention provides the following technical scheme:
a process method for casting and rolling a novel aluminum-magnesium-silicon alloy comprises the following steps:
s1, high-temperature smelting
The Al-Mg-Si alloy is placed in a casting furnace, the temperature in the casting furnace is 700-850 ℃, the Al-Mg-Si alloy in the casting furnace is gradually converted into liquid from solid, the inside of the casting furnace is pumped to vacuum in the melting process, impurities in the Al-Mg-Si alloy can escape from the Al-Mg-Si alloy under the action of vacuum due to the fact that the volatility of the Al-Mg-Si alloy is high at high temperature, and the Al-Mg-Si alloy is secondarily smelted through a vacuum consumable furnace, so that good degassing conditions and a strong deoxidizing atmosphere are created, and the quality of the Al-Mg-Si alloy is further improved.
S2, cooling and casting
Taking out the smelted Al-Mg-Si alloy, standing for 15-30 minutes, controlling the temperature near the Al-Mg-Si alloy to be 100-350 ℃, extracting the vacuum in the casting furnace before casting, carrying out polymerization or polycondensation reaction on the Al-Mg-Si alloy when the interior of the casting furnace reaches a certain vacuum degree, wherein the reaction time is 15 minutes, and adding additives into the Al-Mg-Si alloy to improve the quality of the Al-Mg-Si alloy.
S3 core making by moulding
The aluminum-magnesium-silicon alloy is filled into the molding tool, the flow quantity of the aluminum-magnesium-silicon alloy is 250-220Kg, the molding tool is kept still for a period of time, the temperature of the aluminum-magnesium-silicon alloy is gradually reduced, the shape of the molding tool is changed by a hard wax method, a file or a carving knife is used for correcting the detailed shape, and the shape of the aluminum-magnesium-silicon alloy is changed under the condition that the fluidity of the aluminum-magnesium-silicon alloy is not influenced, so that the purpose of molding and core making of the aluminum-magnesium-silicon alloy is achieved.
S4 oxidizing and pickling
The aluminum-magnesium-silicon alloy is immersed into an aqueous solution containing sulfuric acid, the volume of the aqueous solution is 10% -20%, the temperature is 40 ℃, a proper amount of buffering agent is added, the surface of the cleaned aluminum-magnesium-silicon alloy is silvery white, and in order to eliminate small black slag on the surface of the aluminum-magnesium-silicon alloy, the aluminum-magnesium-silicon alloy can be placed in a normal-temperature environment and subjected to oxidation treatment, so that the black slag on the surface of the aluminum-magnesium-silicon alloy is effectively treated.
S5 rolling metal
The formed aluminum-magnesium-silicon alloy is pickled to remove oxide skin and then is subjected to cold continuous rolling, the temperature of the aluminum-magnesium-silicon alloy is controlled to be 10-15 ℃, due to continuous cooling, the aluminum-magnesium-silicon alloy can be continuously rolled under the mutual extrusion between rollers, and the diameters and the speeds of the two rollers are required to be the same, namely the horizontal speeds are the same.
Preferably, the aluminum-magnesium-silicon alloy can be smelted for three times in the smelting process, so that the quality of the aluminum-magnesium-silicon alloy is continuously improved.
Preferably, the aluminum-magnesium-silicon alloy should accurately control the high-temperature alloy part and prevent the alloy elements in the aluminum-magnesium-silicon alloy from being burnt out due to oxidation.
Preferably, the general steps of molding and core making are mould assembling, casting, sand shakeout, cleaning and checking, the mould is taken as the whole shape, and the parting surface is positioned on a certain section of the mould.
Preferably, the higher the temperature used in the pickling process, the longer the pickling time, and conversely, the lower the temperature, the shorter the pickling time.
Preferably, the corrosion inhibitor used in the pickling process is mainly divided into two types, one is a corrosion inhibitor containing a nitrogen compound, and the other is a corrosion inhibitor containing a sulfur compound.
Preferably, in the process of rolling the aluminum-magnesium-silicon alloy, the deformation zone of the roller is a rigid end, and the thickness of the roller is 2 CM.
Preferably, the speed of the two rollers in the front sliding area of the rollers is the same, and the two rollers have no relative sliding state.
(III) advantageous effects
Compared with the prior art, the invention provides a process method for casting and rolling the novel aluminum-magnesium-silicon alloy, which has the following beneficial effects:
1. the process method for casting and rolling the novel aluminum-magnesium-silicon alloy comprises the steps of placing the aluminum-magnesium-silicon alloy into a casting furnace, smelting the aluminum-magnesium-silicon alloy at a high temperature to enable the aluminum-magnesium-silicon alloy to be converted from a solid into a liquid, simultaneously enabling impurities in the aluminum-magnesium-silicon alloy to escape from the interior of the aluminum-magnesium-silicon alloy under the action of vacuum, improving the quality of the aluminum-magnesium-silicon alloy, taking out the smelted aluminum-magnesium-silicon alloy, and placing the smelted aluminum-magnesium-silicon alloy into a space with the temperature of 100 ℃ plus 350 ℃, wherein the aluminum-magnesium-silicon alloy can undergo polymerization or polycondensation reaction at the moment, and the crystal structure of the aluminum-magnesium-silicon alloy is improved.
2. The process method for casting and rolling the novel aluminum-magnesium-silicon alloy comprises the steps of filling the aluminum-magnesium-silicon alloy into a molding tool, gradually reducing the temperature of the aluminum-magnesium-silicon alloy, and correcting the detailed shape by using a file or a carving tool in a matching manner, thereby achieving the purpose of molding and core making of the aluminum-magnesium-silicon alloy, and when the black slag on the surface of the aluminum-magnesium-silicon alloy needs to be eliminated by immersing the aluminum-magnesium-silicon alloy into the aqueous solution containing sulfuric acid, the surface of the aluminum-magnesium-silicon alloy is oxidized, thereby effectively treating the black slag on the surface of the aluminum-magnesium-silicon alloy, finally removing oxide skin by pickling the formed aluminum-magnesium-silicon alloy, then carrying out cold continuous rolling, under the mutual extrusion between the rollers, the aluminum-magnesium-silicon alloy can be continuously rolled, so that the tensile strength and the toughness of the aluminum-magnesium-silicon alloy are improved, and the corrosion resistance of the aluminum-magnesium-silicon alloy is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.
A process method for casting and rolling a novel aluminum-magnesium-silicon alloy comprises the following steps:
s1, high-temperature smelting
The Al-Mg-Si alloy is placed in a casting furnace, the temperature in the casting furnace is 700-850 ℃, the Al-Mg-Si alloy in the casting furnace is gradually converted into liquid from solid, the inside of the casting furnace is pumped to vacuum in the melting process, impurities in the Al-Mg-Si alloy can escape from the Al-Mg-Si alloy under the action of vacuum due to the fact that the volatility of the Al-Mg-Si alloy is high at high temperature, and the Al-Mg-Si alloy is secondarily smelted through a vacuum consumable furnace, so that good degassing conditions and a strong deoxidizing atmosphere are created, and the quality of the Al-Mg-Si alloy is further improved.
S2, cooling and casting
Taking out the smelted Al-Mg-Si alloy, standing for 15-30 minutes, controlling the temperature near the Al-Mg-Si alloy to be 100-350 ℃, extracting the vacuum in the casting furnace before casting, carrying out polymerization or polycondensation reaction on the Al-Mg-Si alloy when the interior of the casting furnace reaches a certain vacuum degree, wherein the reaction time is 15 minutes, and adding additives into the Al-Mg-Si alloy to improve the quality of the Al-Mg-Si alloy.
S3 core making by moulding
The aluminum-magnesium-silicon alloy is filled into the molding tool, the flow quantity of the aluminum-magnesium-silicon alloy is 250-220Kg, the molding tool is kept still for a period of time, the temperature of the aluminum-magnesium-silicon alloy is gradually reduced, the shape of the molding tool is changed by a hard wax method, a file or a carving knife is used for correcting the detailed shape, and the shape of the aluminum-magnesium-silicon alloy is changed under the condition that the fluidity of the aluminum-magnesium-silicon alloy is not influenced, so that the purpose of molding and core making of the aluminum-magnesium-silicon alloy is achieved.
S4 oxidizing and pickling
The method comprises the steps of immersing the aluminum-magnesium-silicon alloy into an aqueous solution containing sulfuric acid, wherein the volume of the aqueous solution is 10-20%, the temperature is 40 ℃, a proper amount of buffering agent is added, the surface of the cleaned aluminum-magnesium-silicon alloy is silvery white, and in order to eliminate small black slag on the surface of the aluminum-magnesium-silicon alloy, the aluminum-magnesium-silicon alloy can be placed in a normal-temperature environment and subjected to oxidation treatment, so that the black slag on the surface of the aluminum-magnesium-silicon alloy can be effectively treated.
S5 rolling metal
The formed aluminum-magnesium-silicon alloy is pickled to remove oxide skin and then is subjected to cold continuous rolling, the temperature of the aluminum-magnesium-silicon alloy is controlled to be 10-15 ℃, due to continuous cooling, the aluminum-magnesium-silicon alloy can be continuously rolled under the mutual extrusion between rollers, and the diameters and the speeds of the two rollers are required to be the same, namely the horizontal speeds are the same.
The Al-Mg-Si alloy can be smelted for three times in the smelting process so as to continuously improve the quality of the Al-Mg-Si alloy, the Al-Mg-Si alloy needs to accurately control a high-temperature alloy part to prevent alloy elements in the Al-Mg-Si alloy from being burnt and damaged due to oxidation, the general steps of molding and core making comprise box closing, pouring, sand shakeout, cleaning and inspection, a mold is taken as the whole shape, a parting surface is positioned on a certain section of the mold, the higher the temperature used in the pickling process is, the longer the pickling time is, on the contrary, the lower the temperature is, the shorter the pickling time is, in the pickling process, the used corrosion inhibitors are mainly divided into two types, one type is a corrosion inhibitor containing nitrogen compounds, the other type is a corrosion inhibitor containing sulfur compounds, in the rolling process of the Al-Mg-Si alloy, the deformation area of a roller is a rigid end, the thickness of the roller is 2CM, in the front slip area of the roller, the speeds of the two types are the same, and the two rollers have no relative sliding state.
The process method for casting and rolling the novel aluminum-magnesium-silicon alloy comprises the steps of placing the aluminum-magnesium-silicon alloy into a casting furnace, smelting the aluminum-magnesium-silicon alloy at a high temperature to convert the aluminum-magnesium-silicon alloy from solid into liquid, enabling impurities in the aluminum-magnesium-silicon alloy to escape from the interior of the aluminum-magnesium-silicon alloy under the action of vacuum, improving the quality of the aluminum-magnesium-silicon alloy, taking out the smelted aluminum-magnesium-silicon alloy, placing the smelted aluminum-magnesium-silicon alloy into a space with the temperature of 100 ℃ and 350 ℃, enabling the aluminum-magnesium-silicon alloy to undergo polymerization or polycondensation reaction to improve the crystalline structure of the aluminum-magnesium-silicon alloy, filling the aluminum-magnesium-silicon alloy into a molding tool, gradually reducing the temperature of the aluminum-magnesium-silicon alloy, and modifying the detailed shape by using a file or a carving knife in a matching manner, so as to achieve the purpose of molding and core-making of the aluminum-magnesium-silicon alloy, and immersing the aluminum-magnesium-silicon alloy into a water solution containing sulfuric acid, when black slag on the surface of the aluminum-magnesium-silicon alloy needs to be eliminated, the surface of the aluminum-magnesium-silicon alloy is subjected to oxidation treatment, so that the black slag on the surface of the aluminum-magnesium-silicon alloy is effectively treated, and finally, the formed aluminum-magnesium-silicon alloy is subjected to acid washing to remove oxide skin and then is subjected to cold continuous rolling, so that the aluminum-magnesium-silicon alloy can be continuously rolled under the mutual extrusion between rollers, the tensile strength and the toughness of the aluminum-magnesium-silicon alloy are improved, and the corrosion resistance of the aluminum-magnesium-silicon alloy is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A process method for casting and rolling a novel aluminum-magnesium-silicon alloy is characterized by comprising the following steps:
s1, high-temperature smelting
The Al-Mg-Si alloy is placed in a casting furnace, the temperature in the casting furnace is 700-850 ℃, the Al-Mg-Si alloy in the casting furnace is gradually converted into liquid from solid, the inside of the casting furnace is pumped to vacuum in the melting process, impurities in the Al-Mg-Si alloy can escape from the Al-Mg-Si alloy under the action of vacuum due to the fact that the volatility of the Al-Mg-Si alloy is high at high temperature, and the Al-Mg-Si alloy is secondarily smelted through a vacuum consumable furnace, so that good degassing conditions and a strong deoxidizing atmosphere are created, and the quality of the Al-Mg-Si alloy is further improved.
S2, cooling and casting
Taking out the smelted Al-Mg-Si alloy, standing for 15-30 minutes, controlling the temperature near the Al-Mg-Si alloy to be 100-350 ℃, extracting the vacuum in the casting furnace before casting, carrying out polymerization or polycondensation reaction on the Al-Mg-Si alloy when the interior of the casting furnace reaches a certain vacuum degree, wherein the reaction time is 15 minutes, and adding additives into the Al-Mg-Si alloy to improve the quality of the Al-Mg-Si alloy.
S3 core making by moulding
The aluminum-magnesium-silicon alloy is filled into the molding tool, the flow quantity of the aluminum-magnesium-silicon alloy is 250-220Kg, the molding tool is kept still for a period of time, the temperature of the aluminum-magnesium-silicon alloy is gradually reduced, the shape of the molding tool is changed by a hard wax method, a file or a carving knife is used for correcting the detailed shape, and the shape of the aluminum-magnesium-silicon alloy is changed under the condition that the fluidity of the aluminum-magnesium-silicon alloy is not influenced, so that the purpose of molding and core making of the aluminum-magnesium-silicon alloy is achieved.
S4 oxidizing and pickling
The aluminum-magnesium-silicon alloy is immersed into an aqueous solution containing sulfuric acid, the volume of the aqueous solution is 10% -20%, the temperature is 40 ℃, a proper amount of buffering agent is added, the surface of the cleaned aluminum-magnesium-silicon alloy is silvery white, and in order to eliminate small black slag on the surface of the aluminum-magnesium-silicon alloy, the aluminum-magnesium-silicon alloy can be placed in a normal-temperature environment and subjected to oxidation treatment, so that the black slag on the surface of the aluminum-magnesium-silicon alloy is effectively treated.
S5, rolling metal
The formed aluminum-magnesium-silicon alloy is pickled to remove oxide skin and then is subjected to cold continuous rolling, the temperature of the aluminum-magnesium-silicon alloy is controlled to be 10-15 ℃, due to continuous cooling, the aluminum-magnesium-silicon alloy can be continuously rolled under the mutual extrusion between rollers, and the diameters and the speeds of the two rollers are required to be the same, namely the horizontal speeds are the same.
2. The process method for casting and rolling the novel aluminum-magnesium-silicon alloy as claimed in claim 1, wherein the aluminum-magnesium-silicon alloy can be melted for three times during the melting process, so as to continuously improve the quality of the aluminum-magnesium-silicon alloy.
3. The process method for casting and rolling the novel aluminum-magnesium-silicon alloy as claimed in claim 1, wherein the aluminum-magnesium-silicon alloy is used for precisely controlling the high-temperature alloy part and preventing the alloy elements in the aluminum-magnesium-silicon alloy from being burnt by oxidation.
4. A novel process for casting and rolling Al-Mg-Si alloy as claimed in claim 1, wherein the general steps of moulding and core making are mould assembling, pouring, shakeout, cleaning and checking, the mould is used as the whole shape, and the parting plane is located on a certain section of the mould.
5. The process for casting and rolling of the novel Al-Mg-Si alloy according to claim 1, wherein the pickling process is performed at a higher temperature for a longer pickling time, and vice versa at a lower temperature for a shorter pickling time.
6. A novel process for casting and rolling Al-Mg-Si alloy as claimed in claim 1, wherein during pickling, the corrosion inhibitor is mainly divided into two types, one is corrosion inhibitor containing nitrogen compound, and the other is corrosion inhibitor containing sulfur compound.
7. A novel process for casting and rolling Al-Mg-Si alloy as claimed in claim 1, wherein during the rolling of Al-Mg-Si alloy, the deformation zone of the roller is at the end and the thickness of the roller is 2 CM.
8. The process for casting and rolling the novel aluminum-magnesium-silicon alloy as claimed in claim 1, wherein the speed of the two rolls in the front slip region of the rolls is the same, and the two rolls have no relative slip state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210384381.2A CN114855031A (en) | 2022-04-13 | 2022-04-13 | Technological method for casting and rolling novel aluminum-magnesium-silicon alloy |
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| CN202210384381.2A CN114855031A (en) | 2022-04-13 | 2022-04-13 | Technological method for casting and rolling novel aluminum-magnesium-silicon alloy |
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