CN109136680A - A kind of manufacturing method of high-elongation automotive brake aluminium alloy - Google Patents
A kind of manufacturing method of high-elongation automotive brake aluminium alloy Download PDFInfo
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- CN109136680A CN109136680A CN201811324938.3A CN201811324938A CN109136680A CN 109136680 A CN109136680 A CN 109136680A CN 201811324938 A CN201811324938 A CN 201811324938A CN 109136680 A CN109136680 A CN 109136680A
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- 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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
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- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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Abstract
A kind of manufacturing method of high-elongation automotive brake aluminium alloy, is related to a kind of manufacturing method of automotive brake aluminium alloy.It is the problem of aluminium alloys for automobile elongation percentage that existing method to be solved manufactures is low, and punching is cracked.Method: one, weighing Mn, Mg, Zn, Ti and Al, weighed substance is put into different containers stand-by；Two, aluminium alloy melt is prepared；Three, semi-continuous casting；Four, using twin-stage fire processing；Five, hot rolling obtains semi-finished product；Six, semi-finished product are obtained into finished product plate in cold rolling mill；Seven, finished products.The present invention is fiery using twin-stage before rolling, and cold rolling heavy reduction rolling rolls after annealing, improves elongation percentage performance, prevents deep drawing cracks.The present invention is applied to automotive brake field.
Description
Technical field
The present invention relates to a kind of manufacturing methods of automotive brake aluminium alloy.
Background technique
The epoch are constantly progressive with the development of science and technology, and there is new development in auto manufacturing on improving manufacturing quality
Direction.The excellent brake of high-elongation, deep drawability is automobile component application key areas.
20% or so, which opens the elongation percentage of existing Strip product in the generation of punching Automobile Products process
Phenomenon is split, current industrial needs are unable to satisfy.
Summary of the invention
The problem of the present invention is to solve the aluminium alloys for automobile elongation percentage of existing method manufacture is low, and punching is cracked, provides
A kind of manufacturing method of high-elongation automotive brake aluminium alloy.
The manufacturing method of high-elongation automotive brake aluminium alloy of the present invention, comprising the following steps:
One, weigh respectively by weight percentage 0.2%~0.35% Mn, 4.0%~4.5% Mg, 0.1%~
Weighed substance is put into different containers stand-by by the Al of 0.15% Zn, 0.10% Ti and surplus；Described 0.2%~
0.35% Mn is realized by weighing aluminium manganese intermediate alloy, and described 4%~4.5% Mg is realized by weighing magnesium metal
, described 0.1%~0.15% Zn is to realize that described 0.10% Ti is by weighing by weighing aluminium zinc intermediate alloy
What aluminium titanium intermediate alloy was realized, the Al is realized by weighing aluminium ingot；
Two, aluminium alloy melt is prepared:
Weighed aluminium zinc intermediate alloy is equally divided into two parts；
Weighed aluminium ingot is added in resistance reverberatory furnace first, is then added in the aluminium zinc of aluminium manganese intermediate alloy, portion
Between alloy, heating temperature to 760 DEG C~800 DEG C into resistance reverberatory furnace plus aluminium titanium intermediate alloy, after aluminium titanium intermediate alloy is added
Every 10min~30min stirring is primary, stirs 1~5 time altogether, keeps melt temperature at 760 DEG C~800 DEG C during stirring；Then plus
Magnesium metal and another aluminium zinc intermediate alloy stir, and 5min~10min are stirred, using Ar-Cl2Mixed gas refining 5min~
10min obtains alloy melt after flux in covering；
Three, semi-continuous casting: under conditions of temperature is 740 DEG C~760 DEG C, the alloy melt that step 2 is obtained is imported
In the standing furnace of resistance reverberatory furnace, it is passed through Ar-Cl2Mixed gas is stood after refining, keeps the alloy melt in resistance reverberatory furnace
Then alloy melt liquid level in liquid level and flow table carries out semi-continuous casting and obtains aluminium alloy cast ingot in same level；
Four, it after the oxide skin for removing aluminium alloy cast ingot, is put into heating furnace and heats, using twin-stage fire processing, first furnace
Fixed 560 DEG C of the temperature of gas, heats 5h, turns fixed 445 DEG C of temperature, keeps the temperature 7h；Secondly turn fixed 560 DEG C of temperature, heat 3h, turn fixed 525 DEG C of temperature, heat preservation
5.5h, the ingot casting after being heated；
Five, by heating ingot casting obtained in step 4, hot rolling obtains rerolling quality；
Six, by semi-finished product obtained in step 5 in cold rolling mill, crystal grain is completely broken, and processing hardening is formed carefully
Long bacillar structure and banded structure, material have reached complete work-hardened condition, obtain finished product plate.
Seven, finished products: placing products into annealing furnace, the temperature of annealing furnace is set as 380~385 DEG C, when any
When one thermocouple survey material temperature reaches 280~285 DEG C, change the temperature for setting annealing furnace as 340~345 DEG C, when whole thermocouples
When survey material temperature reaches 330~335 DEG C, 1-3h is kept the temperature, is come out of the stove with furnace is air-cooled to 150 DEG C -160 DEG C, guarantee the intensity of material and prolonged
Rate is stretched, automotive brake high-elongation aluminum alloy plate is obtained.
The method of the present invention changes the mechanics of material by control annealing temperature and time using the fire processing of ingot casting twin-stage
Performance.
Further, flux described in step 2 is by weight percent by 45% KCl, 30% NaCl and 25%
Na3AlF6Composition.
Further, refining time is 9min~15min in step 3.
Further, time of repose is 10min~30min in step 3.
Further, in step 3 semi-continuous casting condition are as follows: casting speed be 35mm/min~40mm/min, casting
Temperature is 715 DEG C~740 DEG C, and casting cooling water pressure is 0.03MPa~0.08MPa.
Further, in step 5 hot rolling with a thickness of 5.0~5.5mm.
Further, cold-rolling mill is rolled to 1.2~1.3mm in step 6.
Further, cold rolling general working rate 75%~78% in step 6.
Beneficial effects of the present invention:
The present invention is fiery using twin-stage before rolling, and cold rolling heavy reduction rolling rolls after annealing, and it is forthright to improve extension
Can, it prevent deep drawing cracks.Bipolar equal fire, so that materials microstructure is uniform, cold rolling heavy reduction rolling, crystal grain is completely broken, moves back
Nucleus again grow up by forming core when fiery, more evenly, promotes the performance of material.
1, the present invention uses semi-continuous casting, and twin-stage is fiery before rolling, and changes it and organizes phase, the big working modulus pressure of cold rolling
Prolong, the complete work-hardened condition of material, subsequent anneal, institutional framework again grow up by forming core, and material mechanical performance is improved.
Using the tensile strength 273-294N/mm for the automotive brake aluminium alloy that this method obtains2, yield strength 144-
166N/mm2, 1.25mm180 ° of bending no abnormality seen of radius.
2, the elongation percentage of automotive brake aluminium alloy produced by the present invention is 28%~29.4%, and punching is not cracked；And
Elongation percentage before not regulating and controlling is 23.1%~27.2%, and the automotive brake for solving existing method preparation is extended with aluminium alloy
The problem of rate is low, punching is cracked.
3, automotive brake of the invention is had further the advantage that with aluminium alloy, is that specific gravity is small first, be can reduce car weight, section
About energy consumption；Followed by corrosion resistance is good, reduces the expenses such as oiling, extends service life；Machine-shaping property is good, conducive to the later period plus
Work；Last aluminium waste is easily recycled, and can be recycled, meanwhile, it does not burn, meets fire safety.
Detailed description of the invention
Fig. 1 is aluminium alloy 100 × polarisation macrograph that 330 DEG C of annealing conditions heat preservation 1h are obtained in case study on implementation 1；
Fig. 2 is 330 DEG C of heat preservation 3h 100 × polarisation macrographs of annealing conditions in case study on implementation 1；
Fig. 3 is 340 DEG C of heat preservation 1h 100 × polarisation macrographs of annealing conditions in case study on implementation 2；
Fig. 4 is 340 DEG C of heat preservation 3h 100 × polarisation macrographs of annealing conditions in case study on implementation 2.
Specific embodiment
The technical solution of the present invention is not limited to the following list, further includes between each specific embodiment
Any combination.
Specific embodiment 1: the manufacturing method of present embodiment high-elongation automotive brake aluminium alloy, including with
Lower step:
One, weigh respectively by weight percentage 0.2%~0.35% Mn, 4.0%~4.5% Mg, 0.1%~
Weighed substance is put into different containers stand-by by the Al of 0.15% Zn, 0.10% Ti and surplus；Described 0.2%~
0.35% Mn is realized by weighing aluminium manganese intermediate alloy, and described 4%~4.5% Mg is realized by weighing magnesium metal
, described 0.1%~0.15% Zn is to realize that described 0.10% Ti is by weighing by weighing aluminium zinc intermediate alloy
What aluminium titanium intermediate alloy was realized, the Al is realized by weighing aluminium ingot；
Two, aluminium alloy melt is prepared:
Weighed aluminium zinc intermediate alloy is equally divided into two parts；
Weighed aluminium ingot is added in resistance reverberatory furnace first, is then added in the aluminium zinc of aluminium manganese intermediate alloy, portion
Between alloy, heating temperature to 760 DEG C~800 DEG C into resistance reverberatory furnace plus aluminium titanium intermediate alloy, after aluminium titanium intermediate alloy is added
Every 10min~30min stirring is primary, stirs 1~5 time altogether, keeps melt temperature at 760 DEG C~800 DEG C during stirring；Then plus
Magnesium metal and another aluminium zinc intermediate alloy stir, and 5min~10min are stirred, using Ar-Cl2Mixed gas refining 5min~
10min obtains alloy melt after flux in covering；
Three, semi-continuous casting: under conditions of temperature is 740 DEG C~760 DEG C, the alloy melt that step 2 is obtained is imported
In the standing furnace of resistance reverberatory furnace, it is passed through Ar-Cl2Mixed gas is stood after refining, keeps the alloy melt in resistance reverberatory furnace
Then alloy melt liquid level in liquid level and flow table carries out semi-continuous casting and obtains aluminium alloy cast ingot in same level；
Four, it after the oxide skin for removing aluminium alloy cast ingot, is put into heating furnace and heats, using twin-stage fire processing, first furnace
Fixed 560 DEG C of the temperature of gas, heats 5h, turns fixed 445 DEG C of temperature, keeps the temperature 7h；Secondly turn fixed 560 DEG C of temperature, heat 3h, turn fixed 525 DEG C of temperature, heat preservation
5.5h, the ingot casting after being heated；
Five, by heating ingot casting obtained in step 4, hot rolling obtains rerolling quality；
Six, by semi-finished product obtained in step 5 in cold rolling mill, crystal grain is completely broken, and processing hardening is formed carefully
Long bacillar structure and banded structure, material have reached complete work-hardened condition, obtain finished product plate.
Seven, finished products: placing products into annealing furnace, the temperature of annealing furnace is set as 380~385 DEG C, when any
When one thermocouple survey material temperature reaches 280~285 DEG C, change the temperature for setting annealing furnace as 340~345 DEG C, when whole thermocouples
When survey material temperature reaches 330~335 DEG C, 1-3h is kept the temperature, is come out of the stove with furnace is air-cooled to 150 DEG C -160 DEG C, guarantee the intensity of material and prolonged
Rate is stretched, automotive brake high-elongation aluminum alloy plate is obtained.
Present embodiment uses semi-continuous casting, and twin-stage is fiery before rolling, and changes it and organizes phase, the big working modulus pressure of cold rolling
Prolong, the complete work-hardened condition of material, subsequent anneal, institutional framework again grow up by forming core, and material mechanical performance is improved.
Using the tensile strength 273-294N/mm for the automotive brake aluminium alloy that this method obtains2, yield strength 144-
166N/mm2, 1.25mm180 ° of bending no abnormality seen of radius.
The elongation percentage of automotive brake aluminium alloy made from present embodiment is 28%~29.4%, and punching is not cracked；
And the elongation percentage before not regulating and controlling is 23.1%~27.2%, the automotive brake for solving existing method preparation is prolonged with aluminium alloy
The problem of stretching low rate, punching cracking.
The automotive brake of present embodiment is had further the advantage that with aluminium alloy, is that specific gravity is small first, be can reduce car weight,
Energy saving；Followed by corrosion resistance is good, reduces the expenses such as oiling, extends service life；Machine-shaping property is good, is conducive to the later period
Processing；Last aluminium waste is easily recycled, and can be recycled, meanwhile, it does not burn, meets fire safety.
Specific embodiment 2: the present embodiment is different from the first embodiment in that: flux described in step 2 is
By weight percent by the Na of 45% KCl, 30% NaCl and 25%3AlF6Composition.It is other with one phase of specific embodiment
Together.
Specific embodiment 3: the present embodiment is different from the first embodiment in that: refining time is in step 3
9min~15min.It is other same as the specific embodiment one.
Specific embodiment 4: the present embodiment is different from the first embodiment in that: time of repose is in step 3
10min~30min.It is other same as the specific embodiment one.
Specific embodiment 5: the present embodiment is different from the first embodiment in that: semi-continuous casting in step 3
Condition are as follows: casting speed be 35mm/min~40mm/min, casting temperature be 715 DEG C~740 DEG C, casting cooling water pressure be
0.03MPa~0.08MPa.It is other same as the specific embodiment one.
Specific embodiment 6: the present embodiment is different from the first embodiment in that: hot rolling is thick in step 5
Degree is 5.0~5.5mm.It is other same as the specific embodiment one.
Specific embodiment 7: the present embodiment is different from the first embodiment in that: cold-rolling mill is rolled in step 6
1.2~1.3mm.It is other same as the specific embodiment one.
Specific embodiment 8: the present embodiment is different from the first embodiment in that: cold rolling is always processed in step 6
Rate 75%~78%.It is other same as the specific embodiment one.
Elaborate below to the embodiment of the present invention, following embodiment under the premise of the technical scheme of the present invention into
Row is implemented, and gives detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following realities
Apply example.
Embodiment 1:
The manufacturing method of the present embodiment high-elongation automotive brake aluminium alloy, comprising the following steps:
One, weigh respectively by weight percentage 0.2%~0.35% Mn, 4.0%~4.5% Mg, 0.1%~
Weighed substance is put into different containers stand-by by the Al of 0.15% Zn, 0.10% Ti and surplus；Described 0.2%~
0.35% Mn is realized by weighing aluminium manganese intermediate alloy, and described 4%~4.5% Mg is realized by weighing magnesium metal
, described 0.1%~0.15% Zn is to realize that described 0.10% Ti is by weighing by weighing aluminium zinc intermediate alloy
What aluminium titanium intermediate alloy was realized, the Al is realized by weighing aluminium ingot；
Two, it prepares aluminium alloy melt: weighed aluminium ingot being added in resistance reverberatory furnace first, be then added among aluminium manganese
The aluminium zinc intermediate alloy of alloy, half, heating temperature into resistance reverberatory furnace plus aluminium titanium intermediate alloy, add to 760 DEG C~800 DEG C
Every 10min~30min stirring is primary after entering aluminium titanium intermediate alloy, stirs 1~5 time altogether, keeps melt temperature 760 during stirring
DEG C~800 DEG C；Then plus magnesium metal and the other half aluminium zinc intermediate alloy stir, stir 5min~10min, using Ar-Cl2It is mixed
Gas refinement 5min~10min is closed, obtains alloy melt after flux in covering；
Three, semi-continuous casting: under conditions of temperature is 740 DEG C~760 DEG C, the alloy melt that step 2 is obtained is imported
In the standing furnace of resistance reverberatory furnace, it is passed through Ar-Cl2Mixed gas stands 10min~30min after refining 9min~15min, protects
The alloy melt liquid level in resistance reverberatory furnace and the alloy melt liquid level in flow table are held in same level, is then in casting speed
35mm/min~40mm/min, casting temperature are 715 DEG C~740 DEG C, the item that casting cooling water pressure is 0.03MPa~0.08MPa
Semi-continuous casting is carried out under part obtains aluminium alloys for automobile ingot casting.
Four, it after the oxide skin for removing aluminium alloy cast ingot, is put into heating furnace and heats, turn fixed temperature 445 by 560 DEG C of heating 5h
DEG C heat preservation 7h turns fixed 560 DEG C of heating 3h of temperature equal fiery, ingot castings after being heated that turn fixed 525 DEG C of temperature, two sections of heat preservation 5.5h.
Five, by heating ingot casting obtained in step 4, hot rolling 5.0mm obtains rerolling quality.
Six, by semi-finished product coiled material obtained in step 5 in cold rolling mill, cold-rolling mill is rolled to 1.2mm, and cold rolling is always processed
Rate 76%, crystal grain is completely broken, and processing hardening forms elongated bacillar structure and banded structure, and material has reached to be added completely
Work hardening state obtains finished product plate.
Seven, finished products: placing products into annealing furnace, and the temperature of annealing furnace is set as 380 DEG C, when any one heat
Galvanic couple surveys material temperature when reaching 280 DEG C, changes the temperature for set annealing furnace as 34 DEG C, when whole thermocouples survey material temperature reaches 330 DEG C,
1-3h is kept the temperature, comes out of the stove with furnace is air-cooled to 150 DEG C -160 DEG C, guarantees the intensity and elongation percentage of material, obtains automotive brake height
Elongation aluminum alloy plate.
The present embodiment obtains the tensile strength 273-292N/mm of automotive brake aluminium alloy2, yield strength 144-
165N/mm2, elongation percentage 28.1%-29.2%, 1.25mm180 ° of bending no abnormality seen of radius.
Table 1
330 DEG C of annealing selection in the present embodiment keep the temperature the aluminium alloy obtained under conditions of 1h, 100 × polarisation macrograph
As shown in Figure 1.330 DEG C of annealing selection in the present embodiment, keep the temperature the aluminium alloy obtained under conditions of 3h, and 100 × polarisation tissue shines
Piece is as shown in Figure 2.By Fig. 1 and Fig. 2, it can be seen that at 330 DEG C, 3h is kept the temperature, crystallite dimension is bigger, more uniformly spreads.
Embodiment 2:
The manufacturing method of the present embodiment high-elongation automotive brake aluminium alloy, comprising the following steps:
One, weigh respectively by weight percentage 0.2%~0.35% Mn, 4.0%~4.5% Mg, 0.1%~
Weighed substance is put into different containers stand-by by the Al of 0.15% Zn, 0.10% Ti and surplus；Described 0.2%~
0.35% Mn is realized by weighing aluminium manganese intermediate alloy, and described 4%~4.5% Mg is realized by weighing magnesium metal
, described 0.1%~0.15% Zn is to realize that described 0.10% Ti is by weighing by weighing aluminium zinc intermediate alloy
What aluminium titanium intermediate alloy was realized, the Al is realized by weighing aluminium ingot；
Two, it prepares aluminium alloy melt: weighed aluminium ingot being added in resistance reverberatory furnace first, be then added among aluminium manganese
The aluminium zinc intermediate alloy of alloy, half, heating temperature into resistance reverberatory furnace plus aluminium titanium intermediate alloy, add to 760 DEG C~800 DEG C
Every 10min~30min stirring is primary after entering aluminium titanium intermediate alloy, stirs 1~5 time altogether, keeps melt temperature 760 during stirring
DEG C~800 DEG C；Then plus magnesium metal and the other half aluminium zinc intermediate alloy stir, stir 5min~10min, using Ar-Cl2It is mixed
Gas refinement 5min~10min is closed, obtains alloy melt after flux in covering；
Three, semi-continuous casting: under conditions of temperature is 740 DEG C~760 DEG C, the alloy melt that step 2 is obtained is imported
In the standing furnace of resistance reverberatory furnace, it is passed through Ar-Cl2Mixed gas stands 10min~30min after refining 9min~15min, protects
The alloy melt liquid level in resistance reverberatory furnace and the alloy melt liquid level in flow table are held in same level, is then in casting speed
35mm/min~40mm/min, casting temperature are 715 DEG C~740 DEG C, the item that casting cooling water pressure is 0.03MPa~0.08MPa
Semi-continuous casting is carried out under part obtains aluminium alloys for automobile ingot casting.
Four, it after the oxide skin for removing aluminium alloy cast ingot, is put into heating furnace and heats, turn fixed temperature 445 by 560 DEG C of heating 5h
DEG C heat preservation 7h turns fixed 560 DEG C of heating 3h of temperature equal fiery, ingot castings after being heated that turn fixed 525 DEG C of temperature, two sections of heat preservation 5.5h.
Five, by heating ingot casting obtained in step 4, hot rolling 5.0mm obtains rerolling quality.
Six, by semi-finished product coiled material obtained in step 5 in cold rolling mill, cold-rolling mill is rolled to 1.2mm, and cold rolling is always processed
Rate 76%, crystal grain is completely broken, and processing hardening forms elongated bacillar structure and banded structure, and material has reached to be added completely
Work hardening state obtains finished product plate.
Seven, finished products place products into annealing furnace, change 350 DEG C of fixed temperature when metal high point is to 320 DEG C of temperature, survey metal
Low spot is to 340 DEG C of temperature.1-3h is kept the temperature, comes out of the stove with furnace is air-cooled to 150 DEG C -160 DEG C, obtains automotive brake aluminium alloy.
The present embodiment obtains the tensile strength 278-294N/mm of automotive brake aluminium alloy2, yield strength 145-
166N/mm2, elongation percentage 28%-29.4%, 1.25mm180 ° of bending no abnormality seen of radius.
Table 2
340 DEG C of annealing selection in the present embodiment keep the temperature the aluminium alloy obtained under conditions of 1h, 100 × polarisation macrograph
As shown in Figure 3.340 DEG C of annealing selection in the present embodiment, keep the temperature the aluminium alloy obtained under conditions of 3h, and 100 × polarisation tissue shines
Piece is as shown in Figure 4.By Fig. 3 and Fig. 4, it can be seen that at 340 DEG C, 3h is kept the temperature, crystallite dimension is bigger, more uniformly spreads.
Embodiment 3:
The manufacturing method of the present embodiment high-elongation automotive brake aluminium alloy, comprising the following steps:
One, 0.3% Mn, 4.0% Mg, 0.1% Zn, 0.10% Ti and surplus are weighed respectively by weight percentage
Al, weighed substance is put into different containers stand-by；Described 0.3% Mn is realized by weighing aluminium manganese intermediate alloy
, described 4% Mg is realized by weighing magnesium metal, and described 0.1% Zn is realized by weighing aluminium zinc intermediate alloy
, described 0.10% Ti is realized by weighing aluminium titanium intermediate alloy, and the Al is realized by weighing aluminium ingot；
Two, it prepares aluminium alloy melt: weighed aluminium ingot being added in resistance reverberatory furnace first, be then added among aluminium manganese
Into resistance reverberatory furnace plus aluminium titanium intermediate alloy, aluminium titanium is added to 780 DEG C in the aluminium zinc intermediate alloy of alloy, half, heating temperature
Every 30min stirring is primary after intermediate alloy, stirs 3 times altogether, keeps melt temperature at 780 DEG C during stirring；Plus magnesium metal then
It is stirred with the other half aluminium zinc intermediate alloy, 10min is stirred, using Ar-Cl2Mixed gas refines 10min, in covering after flux
Obtain alloy melt；
Three, semi-continuous casting: under conditions of temperature is 750 DEG C, it is anti-that the alloy melt that step 2 is obtained imports resistance
It penetrates in the standing furnace of furnace, is passed through Ar-Cl2Mixed gas stands 30min after refining 15min, keeps the alloy in resistance reverberatory furnace
Alloy melt liquid level in melt liquid level and flow table is then 40mm/min in casting speed, casting temperature is in same level
730 DEG C, casting cooling water pressure carries out semi-continuous casting under conditions of being 0.05MPa and obtains aluminium alloys for automobile ingot casting.
Four, it after the oxide skin for removing aluminium alloy cast ingot, is put into heating furnace and heats, turn fixed temperature 445 by 560 DEG C of heating 5h
DEG C heat preservation 7h turns fixed 560 DEG C of heating 3h of temperature equal fiery, ingot castings after being heated that turn fixed 525 DEG C of temperature, two sections of heat preservation 5.5h.
Five, by heating ingot casting obtained in step 4, hot rolling 5.0mm obtains rerolling quality.
Six, by semi-finished product coiled material obtained in step 5 in cold rolling mill, cold-rolling mill is rolled to 1.2mm, and cold rolling is always processed
Rate 76%, crystal grain is completely broken, and processing hardening forms elongated bacillar structure and banded structure, and material has reached to be added completely
Work hardening state obtains finished product plate.
Seven, finished products place products into annealing furnace, change 350 DEG C of fixed temperature when metal high point is to 320 DEG C of temperature, survey metal
Low spot is to 340 DEG C of temperature.3h is kept the temperature, comes out of the stove with furnace is air-cooled to 160 DEG C, obtains automotive brake aluminium alloy.
The present embodiment obtains the tensile strength 294N/mm of automotive brake aluminium alloy2, yield strength 166N/mm2, extend
Rate 29.4%, 1.25mm180 ° of bending no abnormality seen of radius.
Table 3
Claims (8)
1. a kind of manufacturing method of high-elongation automotive brake aluminium alloy, it is characterised in that the manufacturing method, including it is following
Step:
One, 0.2%~0.35% Mn, 4.0%~4.5% Mg, 0.1%~0.15% are weighed respectively by weight percentage
Weighed substance is put into different containers stand-by by Zn, 0.10% Ti and the Al of surplus；Described 0.2%~0.35%
Mn is realized by weighing aluminium manganese intermediate alloy, and described 4%~4.5% Mg is realized by weighing magnesium metal, described
0.1%~0.15% Zn is realized by weighing aluminium zinc intermediate alloy, and described 0.10% Ti is by weighing in aluminium titanium
Between alloy realize, the Al is realized by weighing aluminium ingot；
Two, aluminium alloy melt is prepared:
Weighed aluminium zinc intermediate alloy is equally divided into two parts；
Weighed aluminium ingot is added in resistance reverberatory furnace first, aluminium manganese intermediate alloy is then added, a aluminium zinc centre is closed
Gold, heating temperature into resistance reverberatory furnace plus aluminium titanium intermediate alloy, are added every after aluminium titanium intermediate alloy to 760 DEG C~800 DEG C
10min~30min stirring is primary, stirs 1~5 time altogether, keeps melt temperature at 760 DEG C~800 DEG C during stirring；Then plus it is golden
Belong to magnesium and another aluminium zinc intermediate alloy stirs, 5min~10min is stirred, using Ar-Cl2Mixed gas refining 5min~
10min obtains alloy melt after flux in covering；
Three, semi-continuous casting: under conditions of temperature is 740 DEG C~760 DEG C, the alloy melt that step 2 is obtained imports resistance
In the standing furnace of reverberatory furnace, it is passed through Ar-Cl2Mixed gas is stood after refining, keeps the alloy melt liquid level in resistance reverberatory furnace
With the alloy melt liquid level in flow table in same level, then carries out semi-continuous casting and obtain aluminium alloy cast ingot；
Four, it after the oxide skin for removing aluminium alloy cast ingot, is put into heating furnace and heats, using twin-stage fire processing, furnace gas first is fixed
560 DEG C of temperature heats 5h, turns fixed 445 DEG C of temperature, keeps the temperature 7h；Secondly turn fixed 560 DEG C of temperature, heat 3h, turn fixed 525 DEG C of temperature, heat preservation
5.5h, the ingot casting after being heated；
Five, by heating ingot casting obtained in step 4, hot rolling obtains rerolling quality；
Six, by semi-finished product obtained in step 5 in cold rolling mill, crystal grain is completely broken, and processing hardening forms elongated
Bacillar structure and banded structure, material have reached complete work-hardened condition, obtain finished product plate；
Seven, finished products: placing products into annealing furnace, the temperature of annealing furnace is set as 380~385 DEG C, when any one
When thermocouple survey material temperature reaches 280~285 DEG C, changes the temperature for setting annealing furnace as 340~345 DEG C, survey and expect when whole thermocouples
When temperature reaches 330~335 DEG C, 1-3h is kept the temperature, comes out of the stove with furnace is air-cooled to 150 DEG C -160 DEG C, guarantees the intensity and elongation percentage of material,
Obtain automotive brake high-elongation aluminum alloy plate.
2. a kind of manufacturing method of high-elongation automotive brake aluminium alloy according to claim 1, it is characterised in that:
Flux described in step 2 is by weight percent by the Na of 45% KCl, 30% NaCl and 25%3AlF6Composition.
3. a kind of manufacturing method of high-elongation automotive brake aluminium alloy according to claim 1 or 2, feature exist
In: refining time is 9min~15min in step 3.
4. a kind of manufacturing method of high-elongation automotive brake aluminium alloy according to claim 3, it is characterised in that:
Time of repose is 10min~30min in step 3.
5. a kind of manufacturing method of high-elongation automotive brake aluminium alloy according to claim 4, it is characterised in that:
The condition of semi-continuous casting in step 3 are as follows: casting speed is 35mm/min~40mm/min, and casting temperature is 715 DEG C~740
DEG C, casting cooling water pressure is 0.03MPa~0.08MPa.
6. a kind of manufacturing method of high-elongation automotive brake aluminium alloy according to claim 5, it is characterised in that:
Hot rolling is in step 5 with a thickness of 5.0~5.5mm.
7. a kind of manufacturing method of high-elongation automotive brake aluminium alloy according to claim 6, it is characterised in that:
Cold-rolling mill is rolled to 1.2~1.3mm in step 6.
8. a kind of manufacturing method of high-elongation automotive brake aluminium alloy according to claim 7, it is characterised in that:
Cold rolling general working rate 75%~78% in step 6.
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| CN114318034A (en) * | 2021-12-24 | 2022-04-12 | 东北轻合金有限责任公司 | Manufacturing method for producing aluminum alloy stamping part for vehicle bumper by using air cushion furnace |
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| CN105908026A (en) * | 2016-05-31 | 2016-08-31 | 苏州有色金属研究院有限公司 | 5xxx aluminum alloy board for automobile body and manufacturing method thereof |
| CN106011561A (en) * | 2016-08-09 | 2016-10-12 | 东北轻合金有限责任公司 | High-performance Al-Mg alloy cold-worked plate manufacturing method |
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| CN105908026A (en) * | 2016-05-31 | 2016-08-31 | 苏州有色金属研究院有限公司 | 5xxx aluminum alloy board for automobile body and manufacturing method thereof |
| CN106011561A (en) * | 2016-08-09 | 2016-10-12 | 东北轻合金有限责任公司 | High-performance Al-Mg alloy cold-worked plate manufacturing method |
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