CN102080174B - Production method of high Mg-Al alloy plate - Google Patents
Production method of high Mg-Al alloy plate Download PDFInfo
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- CN102080174B CN102080174B CN2010105935869A CN201010593586A CN102080174B CN 102080174 B CN102080174 B CN 102080174B CN 2010105935869 A CN2010105935869 A CN 2010105935869A CN 201010593586 A CN201010593586 A CN 201010593586A CN 102080174 B CN102080174 B CN 102080174B
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Abstract
The invention provides a production method of a high Mg-Al alloy plate, relating to a production method of a Mg-Al alloy plate. The method provided by the invention can be used for solving the problems that in the plate manufactured by the existing manufacturing method of the high Mg-Al alloy plate, grains are thick and large, the tensile strength of materials is low, the fluctuation of the mechanical property is large, and the finished product ratio is low. The high Mg-Al alloy plate comprises the following elements in percentage by weight: 8.3%-9.6% of Mg, 0.4%-0.8% of Mn, 0.05%-0.15% of Ti, less than or equal to 0.3% of Si, less than or equal to 0.3% of Fe, less than or equal to 0.05% of Cu, less than or equal to 0.10% of Ni, less than or equal to 0.20% of Zn and the balance of Al. The production method is as follows: carrying out smelting, casting, secondary hot rolling, intermediate annealing, cold rolling, finished product annealing, straightening and saw cutting on the weighted raw materials, thus obtaining the high Mg-Al alloy plate. The finished product ratio of the high Mg-Al alloy plate is 48%-55%, the strength of the high Mg-Al alloy plate is 390 MPa-400 MPa, and the high Mg-Al alloy plate can be used in aerospace launch vehicle structures and military guided missile warheads.
Description
Technical field
The present invention relates to a kind of working method of magnalium sheet material.
Background technology
Magnalium is the alloy that heat can not be strengthened; Have medium tenacity, processing characteristics and corrosive nature are good, in manufacturing district and ocean exposure, higher solidity to corrosion are arranged all; Being widely used in and making Aeronautics and Astronautics member (covering, framework or spar etc.), also is the preferred material of making the deck of boat, barnacle.The mechanical property of magnalium increases along with the increase of Mg content, but its solidity to corrosion deterioration, decrease ductility is prone to crackle in the preparation process.The high-magnesium aluminum alloy preparation of plates method of existing Mg content >=8% is founding, heating, hot rolling, middle temperature rolling, finished products; Finishing is checked and accepted, and the diameter of crystal grain is 2100 μ m～2300 μ m in the high-magnesium aluminum alloy sheet material of preparation, and crystal grain is thick; The tensile strength of material is 310MPa～360MPa; The mechanical property fluctuation is big, because the waste product that crackle causes is more, yield rate is merely 20%.
Summary of the invention
The present invention is, a mechanical property fluctuation big and yield rate low problem low for the tensile strength thick, material of crystal grain in the high-magnesium aluminum alloy sheet material of the method for manufacture that solves existing high-magnesium aluminum alloy sheet material, and a kind of working method of high-magnesium aluminum alloy sheet material is provided.
The working method of a kind of high-magnesium aluminum alloy sheet material of the present invention; Carry out according to the following steps: one, the mass percent by element in the high-magnesium aluminum alloy sheet material is Mg:8.3%～9.6%, Mn:0.4%～0.8%, Ti:0.05%～0.15%, Si: Fe≤0.3%: Cu≤0.3% :≤0.05%, Ni≤0.10%, Zn :≤0.20%, surplus is that Al takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium titanium master alloy, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium nickel master alloy, aluminium zinc master alloy and remelting respectively with aluminium ingot and join in the exsiccant smelting furnace; Be melting 3h～5h under 700 ℃～750 ℃ the condition in temperature, obtain molten aluminium alloy; Two, be that 680 ℃～720 ℃, casting speed are that 70mm/min～75mm/min, water coolant intensity are that 0.05MPa～0.2MPa, temperature of cooling water are to process the aluminium alloy cast ingot that thickness is 255mm～300mm by the semicontinuous casting method under 10 ℃～20 ℃ the condition with the molten aluminium alloy of step 1 in casting temp; Three, after the aluminium alloy cast ingot that step 2 is obtained mills the casting oxide debris on surface; Use thickness to cover the aluminium alloy cast ingot upper and lower surface as the pure aluminum plate of 2.6mm～3.0mm; Putting into the temperature that is heated to aluminium alloy cast ingot in the process furnace is 400 ℃～430 ℃; The thickness that is hot-rolled down to blank through 5～7 passages is 190mm～210mm, and two sides with blank carry out the hot rolling rolling then, and the thickness that is hot-rolled down to blank through 3～5 passages again is 130mm～140mm; The control hot rolling at the end temperature of blank is not less than 320 ℃, then blank is reduced to room temperature; Four, the blank of reducing to room temperature of step 3 being placed on the temperature that is heated to blank in the process furnace again is 410 ℃～430 ℃, and being rolled into thickness is 5.8mm～6.2mm, obtains work in-process; Five, the work in-process that step 4 obtained are placed on and carry out process annealing in the salt bath, and annealing temperature is that 420 ℃～440 ℃, heat-up time are that the temperature of 15min～20min, water coolant is 10 ℃～30 ℃; Six, roll the work in-process that step 5 is handled are cold-rolled to 2mm～4mm through 5～7 passages plate with double milling train; Seven, the plate of step 6 is placed on salt bath and carries out finished products, annealing temperature is 420 ℃～440 ℃, and be 15min～20min heat-up time, and the temperature of water coolant is 10 ℃～30 ℃; Utilize straightener to align the back sawing after the taking-up, obtain high-magnesium aluminum alloy sheet material.
Single impurity≤0.05% in the high-magnesium aluminum alloy sheet material of the present invention, the scope of all dirt are≤0.15%, and the impurity in this scope is to the not influence of performance of aluminium alloy strips.
Mg content is rationally controlled the ingot casting composition proportion up to 8.3%～9.6% in the high-magnesium aluminum alloy sheet material of the present invention, has guaranteed stable components, the homogeneous microstructure of ingot casting; Adopt second-heating, reroll, strict control tapping temperature wraps up ingot casting with pure aluminum plate before time rolling for the first time, and strengthens rolling, overcomes the influence of rapid work-hardening, makes the generation of ingot bar minimizing crackle; The process annealing operation adopts the liquid annealing mode to carry out, and heat-up time is controlled in strictness, prevents grain growth, for the processing of postorder two-fold provides organizational structures; The finished products operation adopts the liquid annealing mode to carry out, and heat-up time is controlled in strictness, and sheet material heats up rapidly, and crystal grain is tiny, and particle diameter is 100 μ m～150 μ m, homogeneous microstructure, and no coarse grain has guaranteed the final stable mechanical property of sheet material; Adopt the water-cooling pattern cooling behind the liquid annealing, crystal grain has little time to grow up, for stable mechanical property provides assurance.
The high-magnesium aluminum alloy sheet material plate face of the present invention's preparation is smooth, thin and thick is even, surface smoothness good, and liquid annealing, the oil slick that produces in the operation of rolling are adopted in annealing; Oil film is burnt in the liquid annealing process, and finished surface does not have oil mark, and yield rate is 48%～55%; Stable mechanical property, its intensity 390MPa～400MPa, its good welding performance; Antiseptic property is good, can be used for space transporter structural part and ordnance missile bullet.
Description of drawings
Fig. 1 is the metallographic structure photo of the high-magnesium aluminum alloy sheet material of embodiment 26 preparations.
Embodiment
Embodiment one: the working method of a kind of high-magnesium aluminum alloy sheet material of this embodiment; Carry out according to the following steps: one, the mass percent by element in the high-magnesium aluminum alloy sheet material is Mg:8.3%～9.6%, Mn:0.4%～0.8%, Ti:0.05%～0.15%, Si: Fe≤0.3%: Cu≤0.3% :≤0.05%, Ni≤0.10%, Zn :≤0.20%, surplus is that Al takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium titanium master alloy, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium nickel master alloy, aluminium zinc master alloy and remelting respectively with aluminium ingot and join in the exsiccant smelting furnace; Be melting 3h～5h under 700 ℃～750 ℃ the condition in temperature, obtain molten aluminium alloy; Two, be that 680 ℃～720 ℃, casting speed are that 70mm/min～75mm/min, water coolant intensity are that 0.05MPa～0.2MPa, temperature of cooling water are to process the aluminium alloy cast ingot that thickness is 255mm～300mm by the semicontinuous casting method under 10 ℃～20 ℃ the condition with the molten aluminium alloy of step 1 in casting temp; Three, after the aluminium alloy cast ingot that step 2 is obtained mills the casting oxide debris on surface; Use thickness to cover the aluminium alloy cast ingot upper and lower surface as the pure aluminum plate of 2.6mm～3.0mm; Putting into the temperature that is heated to aluminium alloy cast ingot in the process furnace is 400 ℃～430 ℃; The thickness that is hot-rolled down to blank through 5～7 passages is 190mm～210mm, and two sides with blank carry out the hot rolling rolling then, and the thickness that is hot-rolled down to blank through 3～5 passages again is 130mm～140mm; The control hot rolling at the end temperature of blank is not less than 320 ℃, then blank is reduced to room temperature; Four, the blank of reducing to room temperature of step 3 being placed on the temperature that is heated to blank in the process furnace again is 410 ℃～430 ℃, and being rolled into thickness is 5.8mm～6.2mm, obtains work in-process; Five, the work in-process that step 4 obtained are placed on and carry out process annealing in the salt bath, and annealing temperature is that 420 ℃～440 ℃, heat-up time are that the temperature of 15min～20min, water coolant is 10 ℃～30 ℃; Six, roll the work in-process that step 5 is handled are cold-rolled to 2mm～4mm through 5～7 passages plate with double milling train; Seven, the plate of step 6 is placed on salt bath and carries out finished products, annealing temperature is 420 ℃～440 ℃, and be 15min～20min heat-up time, and the temperature of water coolant is 10 ℃～30 ℃; Utilize straightener to align the back sawing after the taking-up, obtain high-magnesium aluminum alloy sheet material.
Mg content is rationally controlled the ingot casting composition proportion up to 8.3%～9.6% in the high-magnesium aluminum alloy sheet material of this embodiment, has guaranteed stable components, the homogeneous microstructure of ingot casting; Adopt second-heating, reroll, strict control tapping temperature wraps up ingot casting with pure aluminum plate before the hot rolling first time, and strengthens rolling, overcomes the influence of rapid work-hardening, makes ingot bar reduce the generation of crackle; The process annealing operation adopts the liquid annealing mode to carry out, and heat-up time is controlled in strictness, prevents grain growth, for the processing of postorder two-fold provides organizational structures; The finished products operation adopts the liquid annealing mode to carry out, and heat-up time is controlled in strictness, and sheet material heats up rapidly, and crystal grain is tiny, homogeneous microstructure, and no coarse grain has guaranteed the final stable mechanical property of sheet material; Adopt the water-cooling pattern cooling behind the liquid annealing, crystal grain has little time to grow up, for stable mechanical property provides assurance.The high-magnesium aluminum alloy sheet material plate face of this embodiment preparation is smooth, thin and thick is even, surface smoothness good; No oil mark, yield rate are 48%～55%; Stable mechanical property, its intensity 390MPa～400MPa, its good welding performance; Antiseptic property is good, can be used for space transporter structural part and ordnance missile bullet.
Embodiment two: what this embodiment and embodiment one were different is that the mass percent by element in the high-magnesium aluminum alloy sheet material is Mg:8.5%～9.3% in the step 1; Mn:0.5%～0.7%; Ti:0.06%～0.12%; Si:0.02%～0.28%; Fe:0.02%～0.28%; Cu:0.01%～0.04%; Ni:0.01%～0.09%; Zn:0.02%～0.18%; Surplus is that Al takes by weighing pure magnesium ingot respectively; Aluminium manganese master alloy; Aluminium titanium master alloy; Aluminium silicon master alloy; The ferro-aluminum master alloy; Electrolytic copper; Aluminium nickel master alloy; Aluminium ingot is used in aluminium zinc master alloy and remelting.Other is identical with embodiment one.
Embodiment three: what this embodiment and embodiment one were different is that the mass percent by element in the high-magnesium aluminum alloy sheet material is Mg:8.8% in the step 1; Mn:0.6%; Ti:0.09%; Si:0.15%; Fe:0.15%; Cu:0.03%; Ni:0.06%; Zn:0.10%; Surplus is that Al takes by weighing pure magnesium ingot respectively; Aluminium manganese master alloy; Aluminium titanium master alloy; Aluminium silicon master alloy; The ferro-aluminum master alloy; Electrolytic copper; Aluminium nickel master alloy; Aluminium ingot is used in aluminium zinc master alloy and remelting.Other is identical with embodiment one.
Embodiment four: what this embodiment was different with one of embodiment one to three is: the smelting temperature in the step 1 is 710 ℃～740 ℃, and smelting time is 3.5h～4.5h.Other is identical with one of embodiment one to three.
Embodiment five: what this embodiment was different with one of embodiment one to three is: the smelting temperature in the step 1 is 730 ℃, and smelting time is 4.0h.Other is identical with one of embodiment one to three.
Embodiment eight: what this embodiment was different with one of embodiment one to seven is: casting temp is that 690 ℃～710 ℃, casting speed are that 71mm/min～74mm/min, water coolant intensity are that 0.09MPa～0.18MPa, temperature of cooling water are 12 ℃～18 ℃ in the step 2.Other is identical with one of embodiment one to seven.
Embodiment nine: what this embodiment was different with one of embodiment one to seven is: casting temp is that 700 ℃, casting speed are that 73mm/min, water coolant intensity are that 0.15MPa, temperature of cooling water are 15 ℃ in the step 2.Other is identical with one of embodiment one to seven.
Embodiment ten: what this embodiment was different with one of embodiment one to nine is: the thickness of aluminium alloy cast ingot is 260mm～290mm in the step 2.Other is identical with one of embodiment one to nine.
Embodiment 11: what this embodiment was different with one of embodiment one to ten is: the thickness of aluminium alloy cast ingot is 280mm in the step 2.Other is identical with one of embodiment one to ten.
Embodiment 12: what this embodiment was different with one of embodiment one to 11 is: use thickness to cover as the pure aluminum plate of 2.7mm～2.9mm the aluminium alloy cast ingot upper and lower surface in the step 3.Other is identical with one of embodiment one to 11.
Embodiment 13: what this embodiment was different with one of embodiment one to 11 is: use thickness to cover as the pure aluminum plate of 2.8mm the aluminium alloy cast ingot upper and lower surface in the step 3.Other is identical with one of embodiment one to 11.
Embodiment 14: what this embodiment was different with one of embodiment one to 13 is: the temperature with aluminium alloy cast ingot in the step 3 is heated to 410 ℃～425 ℃.Other is identical with one of embodiment one to 13.
Embodiment 15: what this embodiment was different with one of embodiment one to 13 is: the temperature with aluminium alloy cast ingot in the step 3 is heated to 420 ℃.Other is identical with one of embodiment one to 13.
Embodiment 16: what this embodiment was different with one of embodiment one to 15 is: when the thickness that is hot-rolled down to blank through 6 passages in the step 3 is 200mm; Two sides with blank carry out the hot rolling rolling then, and the thickness that is hot-rolled down to blank through 4 passages again is 135mm.Other is identical with one of embodiment one to 15.
Embodiment 17: what this embodiment was different with one of embodiment one to 16 is: in the step 4 blank of reducing to room temperature of step 3 being placed on the temperature that is heated to blank in the process furnace again is 415 ℃～425 ℃, and being rolled into thickness is 5.9mm～6.1mm.Other is identical with one of embodiment one to 16.
Embodiment 18: what this embodiment was different with one of embodiment one to 16 is: in the step 4 blank of reducing to room temperature of step 3 being placed on the temperature that is heated to blank in the process furnace again is 420 ℃, and being rolled into thickness is 6.0mm.Other is identical with one of embodiment one to 16.
Embodiment 19: what this embodiment was different with one of embodiment one to 18 is: the temperature of process annealing is that 425 ℃～435 ℃, heat-up time are that the temperature of 16min～19min, water coolant is 12 ℃～28 ℃ in the step 5.Other is identical with one of embodiment one to 18.
Embodiment 20: what this embodiment was different with one of embodiment one to 18 is: the temperature of process annealing is that 430 ℃, heat-up time are that the temperature of 18min, water coolant is 20 ℃ in the step 5.Other is identical with one of embodiment one to 18.
Embodiment 21: what this embodiment was different with one of embodiment one to 20 is: the thickness of cold rolling back plate is 2.2mm～3.6mm in the step 6.Other is identical with one of embodiment one to 20.
Embodiment 22: what this embodiment was different with one of embodiment one to 20 is: the thickness of cold rolling back plate is 3.2mm in the step 6.Other is identical with one of embodiment one to 20.
Embodiment 23: what this embodiment was different with one of embodiment one to 22 is: cold rolling road number of times is 6 passages.Other is identical with one of embodiment one to 22.
Embodiment 24: what this embodiment was different with one of embodiment one to 23 is: the temperature of finished products is 410 ℃～430 ℃ in the step 7, and be 16min～18min heat-up time, and the temperature of water coolant is 15 ℃～28 ℃.Other is identical with one of embodiment one to 23.
Embodiment 25: what this embodiment was different with one of embodiment one to 23 is: the temperature of finished products is 420 ℃ in the step 7, and be 15min heat-up time, and the temperature of water coolant is 20 ℃.Other is identical with one of embodiment one to 23.
Embodiment 26: the working method of a kind of high-magnesium aluminum alloy sheet material of this embodiment; Carry out according to the following steps: be that Mg:9.0%, Mn:0.5%, Ti:0.1%, Si:0.2%, Fe:0.2%, Cu:0.05%, Ni:0.10%, Zn:0.10%, surplus are that Al takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium titanium master alloy, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium nickel master alloy, aluminium zinc master alloy and remelting respectively with aluminium ingot and join in the exsiccant smelting furnace one, by the mass percent of element in the high-magnesium aluminum alloy sheet material; Be melting 4h under 730 ℃ the condition in temperature, obtain molten aluminium alloy; Two, be that 700 ℃, casting speed are to process the aluminium alloy cast ingot that thickness is 300mm by the semicontinuous casting method under the condition of 10 ℃ of 73mm/min, water coolant intensity 0.15MPa, temperature of cooling water with the molten aluminium alloy of step 1 in casting temp; Three, after the aluminium alloy cast ingot that step 2 is obtained mills the casting oxide debris on surface; Putting into the temperature that is heated to aluminium alloy cast ingot in the process furnace is 420 ℃; Use thickness to cover the aluminium alloy cast ingot upper and lower surface as the pure aluminum plate of 3.0mm; When the thickness that is hot-rolled down to blank through 6 passages was 200mm, two sides with blank carried out the hot rolling rolling then, and the thickness that is hot-rolled down to blank through 4 passages again is 140mm; The control hot rolling at the end temperature of blank is not less than 320 ℃, then blank is reduced to room temperature; Four, the blank of reducing to room temperature of step 3 being placed on the temperature that is heated to blank in the process furnace again is 430 ℃, and being rolled into thickness is 6.0mm, obtains work in-process; Five, the work in-process that step 4 obtained are placed on and carry out process annealing in the salt bath, and annealing temperature is that 420 ℃, heat-up time are that the temperature of 15-20min, water coolant is a room temperature; Six, roll the work in-process that step 5 is handled are cold-rolled to 3mm through 7 passages plate with double milling train; Seven, the plate of step 6 is placed on salt bath and carries out finished products, annealing temperature is 420 ℃, and be 20min heat-up time, and the temperature of water coolant is a room temperature; Take out the back and utilize smart flat 17 roller straighteners to align the back sawing, obtain high-magnesium aluminum alloy sheet material.
The allowed band of single impurity is≤0.03% in the described high-magnesium aluminum alloy sheet material of this embodiment, and the scope of all dirt is≤0.15%, and the impurity in this scope is to the not influence of performance of aluminium alloy strips.
Mg content is up to 9.0% in the high-magnesium aluminum alloy sheet material of this embodiment preparation; Composition proportion is reasonable, homogeneous microstructure, and the metallographic structure photo of the high-magnesium aluminum alloy sheet material of this embodiment preparation is as shown in Figure 1; The magnification of this photo is 100 times; Can see from Fig. 1, uniform crystal particles, size of microcrystal is 40 μ m～50 μ m; High-magnesium aluminum alloy sheet material plate face is smooth, thin and thick is even, surface smoothness good, and no oil mark, yield rate are 50%, and stable mechanical property, its intensity are 398MPa.
Claims (10)
1. the working method of a high-magnesium aluminum alloy sheet material; The working method that it is characterized in that high-magnesium aluminum alloy sheet material is carried out according to the following steps: be that Mg:8.3%～9.6%, Mn:0.4%～0.8%, Ti:0.05%～0.15%, Si:0＜Si≤0.3%, Fe:0＜Fe≤0.3%, Cu:0＜Cu≤0.05%, Ni:0＜Ni≤0.10%, Zn:0＜Zn≤0.20%, surplus are that Al takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium titanium master alloy, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium nickel master alloy, aluminium zinc master alloy and remelting respectively with aluminium ingot and join in the exsiccant smelting furnace by the mass percent of element in the high-magnesium aluminum alloy sheet material one; Be melting 3h～5h under 700 ℃～750 ℃ the condition in temperature, obtain molten aluminium alloy; Two, be that 680 ℃～720 ℃, casting speed are that 70mm/min～75mm/min, water coolant intensity are that 0.05MPa～0.2MPa, temperature of cooling water are to process the aluminium alloy cast ingot that thickness is 255mm～300mm by the semicontinuous casting method under 10 ℃～20 ℃ the condition with the molten aluminium alloy of step 1 in casting temp; Three, after the aluminium alloy cast ingot that step 2 is obtained mills the casting oxide debris on surface; Use thickness to cover the aluminium alloy cast ingot upper and lower surface as the pure aluminum plate of 2.6mm～3.0mm; Putting into the temperature that is heated to aluminium alloy cast ingot in the process furnace is 400 ℃～430 ℃; The thickness that is hot-rolled down to blank through 5～7 passages is 190mm～210mm, and two sides with blank carry out the hot rolling rolling then, and the thickness that is hot-rolled down to blank through 3～5 passages again is 130mm～140mm; The control hot rolling at the end temperature of blank is not less than 320 ℃, then blank is reduced to room temperature; Four, the blank of reducing to room temperature of step 3 being placed on the temperature that is heated to blank in the process furnace again is 410 ℃～430 ℃, and being rolled into thickness is 5.8mm～6.2mm, obtains work in-process; Five, the work in-process that step 4 obtained are placed on and carry out process annealing in the salt bath, and annealing temperature is that 420 ℃～440 ℃, heat-up time are that the temperature of 15min～20min, water coolant is 10 ℃～30 ℃; Six, roll the work in-process that step 5 is handled are cold-rolled to 2mm～4mm through 5～7 passages plate with double milling train; Seven, the plate of step 6 is placed on salt bath and carries out finished products, annealing temperature is 420 ℃～440 ℃, and be 15min～20min heat-up time, and the temperature of water coolant is 10 ℃～30 ℃; Utilize straightener to align the back sawing after the taking-up, obtain high-magnesium aluminum alloy sheet material.
2. the working method of a kind of high-magnesium aluminum alloy sheet material according to claim 1 is characterized in that in the step 1 that mass percent by element in the high-magnesium aluminum alloy sheet material is that Mg:8.5%～9.3%, Mn:0.5%～0.7%, Ti:0.06%～0.12%, Si:0.02%～0.28%, Fe:0.02%～0.28%, Cu:0.01%～0.04%, Ni:0.01%～0.09%, Zn:0.02%～0.18%, surplus are that Al takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium titanium master alloy, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium nickel master alloy, aluminium zinc master alloy and remelting respectively and uses aluminium ingot.
3. the working method of a kind of high-magnesium aluminum alloy sheet material according to claim 1 and 2 is characterized in that the smelting temperature in the step 1 is 710 ℃～740 ℃, and smelting time is 3.5h～4.5h.
4. the working method of a kind of high-magnesium aluminum alloy sheet material according to claim 1 and 2 is characterized in that in the step 2 that casting temp is that 690 ℃～710 ℃, casting speed are that 71mm/min～74mm/min, water coolant intensity are that 0.09MPa～0.18MPa, temperature of cooling water are 12 ℃～18 ℃.
5. the working method of a kind of high-magnesium aluminum alloy sheet material according to claim 1 and 2, the thickness that it is characterized in that aluminium alloy cast ingot in the step 2 is 260mm～290mm.
6. the working method of a kind of high-magnesium aluminum alloy sheet material according to claim 1 and 2 is characterized in that in the step 3 temperature of aluminium alloy cast ingot is heated to 410 ℃～425 ℃.
7. the working method of a kind of high-magnesium aluminum alloy sheet material according to claim 1 and 2 is characterized in that using thickness to cover as the pure aluminum plate of 2.7mm～2.9mm the aluminium alloy cast ingot upper and lower surface in the step 3.
8. the working method of a kind of high-magnesium aluminum alloy sheet material according to claim 1 and 2; When it is characterized in that in the step 3 being 200mm through the thickness that 6 passages are hot-rolled down to blank; Two sides with blank carry out the hot rolling rolling then, and the thickness that is hot-rolled down to blank through 4 passages again is 135mm.
9. the working method of a kind of high-magnesium aluminum alloy sheet material according to claim 1 and 2; It is characterized in that in the step 4 that it is 415 ℃～425 ℃ that the blank of reducing to room temperature with step 3 is placed on the temperature that is heated to blank in the process furnace again, being hot-rolled down to thickness is 5.9mm～6.1mm.
10. the working method of a kind of high-magnesium aluminum alloy sheet material according to claim 1 and 2, the temperature that it is characterized in that process annealing in the step 5 are that 425 ℃～435 ℃, heat-up time are that the temperature of 16min～19min, water coolant is 12 ℃～28 ℃.
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| CN108441723A (en) * | 2018-04-25 | 2018-08-24 | 东北轻合金有限责任公司 | A kind of antirust high-magnesium aluminum alloy circle ingot casting and its manufacturing method |
| CN109706410B (en) * | 2019-01-25 | 2021-08-13 | 东北轻合金有限责任公司 | Processing method of aluminum alloy strip with end face wrapped with aluminum foil for inhibiting surface color difference of side edge part |
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| CN100482829C (en) * | 2007-04-29 | 2009-04-29 | 东北轻合金有限责任公司 | Manufacturing method of aluminum alloy plate for train compartment |
| CN100482830C (en) * | 2007-04-29 | 2009-04-29 | 东北轻合金有限责任公司 | Aviation aluminum alloy pre-stretching plate and production method thereof |
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