CN108546849A - A kind of high-performance aluminium alloy slab and its stable manufacturing method - Google Patents
A kind of high-performance aluminium alloy slab and its stable manufacturing method Download PDFInfo
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- CN108546849A CN108546849A CN201810381328.0A CN201810381328A CN108546849A CN 108546849 A CN108546849 A CN 108546849A CN 201810381328 A CN201810381328 A CN 201810381328A CN 108546849 A CN108546849 A CN 108546849A
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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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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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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- 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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- 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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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
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Abstract
A kind of high-performance aluminium alloy slab and its stable manufacturing method, the present invention relates to a kind of high-performance aluminium alloy slab and its stablize manufacturing method, tensile strength is easily led to the problem of the purpose of the present invention is to solve existing aluminum alloy plate materials in process of production and yield strength raises simultaneously, element includes Si in aluminium alloy thick plate of the present invention, Fe, Cu, Mn, Mg, Cr, Zn and Al, it is by aluminium silicon intermediate alloy, ferro-aluminum intermediate alloy, cathode copper, magnesium manganese intermediate alloy, pure zinc ingot, aluminium chromium hardener, aluminium titanium intermediate alloy and aluminium ingot are through smelting, casting, homogenizing annealing, hot rolling, Gu molten, it stretches, timeliness is made.The present invention selects rational technological process, achievees the purpose that thinning microstructure, raising intensity, toughness, corrosion resistance and fatigue behaviour by the control to rolling, heat treatment, stretching, has achieved the purpose that such plate property is made to stablize by the control of heat treatment temperature.The present invention applies aluminum alloy forged field.
Description
Technical field
The present invention relates to a kind of high-performance aluminium alloy slab and its stablize manufacturing method.
Background technology
High-tensile low yield strength novel aluminum alloy has very high tensile strength intensity, lower yield strength,
The features such as preferable corrosion resisting property, especially has excellent fatigue behaviour, is the exemplary alloy in aluminium alloy.Such aluminium alloy
Plank will be as the main material used in aircraft, vessel, railway, auto manufacturing, tank-making industry.Such Al-alloy products master
It to be obtained by solid dissolving method or cold-rolling method, the limitation and technique of this two methods are shapeless unstable to cause aluminium to close
Golden plate material easily generates the case where tensile strength and yield strength the raise simultaneously problem in process of production, makes such aluminium
The application of alloy is very restricted.And the performance of the aluminum alloy plate materials product manufactured with above-mentioned two methods is extremely
It is unstable, it cannot be satisfied market and required using standard, also cannot be satisfied the requirement of market batch production.
Invention content
Tensile strength is easily generated in process of production the purpose of the present invention is to solve existing aluminum alloy plate materials and is bent
It takes the case where intensity raises simultaneously to occur, and forms continuous etching channels in crystal boundary and make timber intensity, toughness, corrosion resistance
And poor fatigue properties, the problem of market is required using standard is cannot be satisfied, a kind of high-performance aluminium alloy slab and its steady is provided
Determine manufacturing method.
It is Si that a kind of high-performance aluminium alloy slab of the present invention, which is by the mass percent of element in aluminium alloy thick plate,：0.6%
~1.3%, Fe：1.5%~1.8%, Cu：1.2%~1.4%, Mn：2.1%~2.4%, Mg：1.1%~1.4%, Cr：
1.2%~1.4%, Zn：1.6%~1.8%, the ratio that surplus is Al is by aluminium silicon intermediate alloy, ferro-aluminum intermediate alloy, electrolysis
Copper, magnesium manganese intermediate alloy, pure zinc ingot, aluminium chromium hardener, aluminium titanium intermediate alloy and aluminium ingot are made.
A kind of stabilization manufacturing method of high-performance aluminium alloy slab of the present invention, follows the steps below：
One, it is Si by the mass percent of element in aluminium alloy thick plate：0.6%~1.3%, Fe：1.5%~1.8%,
Cu：1.2%~1.4%, Mn：2.1%~2.4%, Mg：1.1%~1.4%, Cr：1.2%~1.4%, Zn：1.6%~
1.8%, surplus be Al ratio weigh aluminium silicon intermediate alloy, ferro-aluminum intermediate alloy, cathode copper, magnesium manganese intermediate alloy, pure zinc ingot,
Aluminium chromium hardener, aluminium titanium intermediate alloy and aluminium ingot, are then added in dry smelting furnace, are 870 DEG C~877 DEG C in temperature
Under conditions of melting 8h~11h, obtain molten aluminium alloy；
Two, by the molten aluminium alloy of step 1 casting temperature be 823 DEG C~831 DEG C, casting speed be 80mm/min~
By semicontinuous under conditions of 95mm/min, cooling water intensity are 0.51MPa~0.58MPa, cooling water temperature is 10 DEG C~14 DEG C
The aluminium alloy cast ingot that specification is 520mm × 1500mm is made in casting；
Three, it is 647 DEG C~652 the aluminium alloy cast ingot that step 2 obtains to be put into heat-treatment furnace and be heated to metal temperature
DEG C, 640 DEG C~650 DEG C heating 4h~6h of rear constant temperature change 615 DEG C~625 DEG C of constant temperature, keep the temperature 17h~19h, carry out homogenization and move back
Fire processing；
Four, by after the oxide skin on step 3 homogenizing annealing treated aluminium alloy cast ingot mills surface, it is put into heating
Heated in stove, 660 DEG C of constant temperature heat preservation 9h~10h turn 630 DEG C of constant temperature, keep the temperature to the tapping temperature of aluminium alloy cast ingot be 575 DEG C~
583℃；
Five, the aluminium alloy cast ingot after heating step 4 is rolled into the plank that thickness is 13.0mm~15.0mm, obtains heat
Roll boards half-finished product；
Six, the hot rolling boards half-finished product that step 5 obtains is put into glowing furnace and is dissolved, 576 DEG C~581 DEG C heating of constant temperature
47min~54min, then keeps the temperature 61min~69min, then with the transfer time of 24s~31s into 10 DEG C~13 DEG C of water
It is cooled to room temperature, obtains solid solution plank A；
Seven, the solid solution plank A cold-workings for obtaining step 6 obtain cold-working plate at the plank that thickness is 7.5mm~8.5mm
Material；
Eight, the cold-working plank that step 7 obtains is put into glowing furnace, 545 DEG C~551 DEG C heating 56min of constant temperature~
62min keeps the temperature 57min~63min, is used after coming out of the stove cooling in the water for enter 8 DEG C~10 DEG C with the transfer time of 18s~22s；
Nine, the plank that step 8 obtains is put into glowing furnace, 105 DEG C~111 DEG C of constant temperature, heats 22min~29min,
73min~78min is kept the temperature, with the transfer time of 10s~14s into cooling in 8 DEG C~11 DEG C of water after coming out of the stove；
Ten, the plank that step 9 obtains is annealed with heat-treatment furnace, in 178 DEG C~182 DEG C of 180 DEG C of constant temperature and metal temperature
Under conditions of keep the temperature 5.5h~7h；
11, the plank that step 10 obtains is stretched with stretching-machine, amount of tension is 2.6%~2.9%, is stretched
Plank；
12, the stretching plank that step 11 obtains is put into heat-treatment furnace and is heated to 90 DEG C, then in 90 DEG C of constant temperature and
40h~44h is kept the temperature under conditions of 88 DEG C~92 DEG C of metal temperature, under conditions of turning 48 DEG C~52 DEG C of 50 DEG C of constant temperature and metal temperature
2.5h~3h is kept the temperature, high-tensile low yield strength performance aluminium alloy thick plate is obtained.
The high-tensile low yield strength performance of the high-performance aluminium alloy slab of the present invention is better than other alloy products,
Other mechanical properties, corrosion resisting property and fatigue behaviour are also maintained in preferable performance range, while such high tensile is determined
The stabilization manufacturing method of intensity low yield strength aluminium alloy thick plate has filled up high-tensile low yield strength aluminium alloy thick plate
Stablize the blank of manufacturing method.The present invention selects rational technological process, is reached by the control to rolling, heat treatment, stretching
Thinning microstructure improves intensity, toughness, the purpose of corrosion resistance and fatigue behaviour.Having been reached by the control of heat treatment temperature makes this
The purpose that kind plate property is stablized.Produce that plate face is smooth, thin and thick is uniform, surface smoothness is good, performance is steady using the present invention
Fixed aluminum alloy thin slab products, tensile strength 553MPa~568MPa, yield strength 60MPa~79MPa, elongation percentage 35%~
41%, fracture toughness L-T：T-L：Peeling Corrosion reaches P grades or more, can be applied to
The multiple fields such as aircraft, railway, naval vessel, auto manufacturing, tank-making industry.
Specific implementation mode
Technical solution of the present invention is not limited to the specific implementation mode of act set forth below, further include each specific implementation mode it
Between arbitrary combination.
Specific implementation mode one：A kind of high-performance aluminium alloy slab of present embodiment is the matter by element in aluminium alloy thick plate
Amount percentage is Si：0.6%~1.3%, Fe：1.5%~1.8%, Cu：1.2%~1.4%, Mn：2.1%~2.4%, Mg：
1.1%~1.4%, Cr：1.2%~1.4%, Zn：1.6%~1.8%, surplus is the ratio of Al by aluminium silicon intermediate alloy, aluminium
Iron intermediate alloy, cathode copper, magnesium manganese intermediate alloy, pure zinc ingot, aluminium chromium hardener, aluminium titanium intermediate alloy and aluminium ingot are made.
The high-tensile low yield strength performance of the high-performance aluminium alloy slab of present embodiment is closed better than other aluminium
Golden product, other mechanical properties, corrosion resisting property and fatigue behaviour are also maintained in preferable performance range, the high property of present embodiment
The plate face of energy aluminium alloy thick plate is smooth, thin and thick is uniform, surface smoothness is good, the aluminum alloy thin slab products of performance stabilization, and tension is strong
Spend 553MPa~568MPa, yield strength 60MPa~79MPa, elongation percentage 35%~41%, fracture toughness L-T：36~T-L：Peeling Corrosion reaches P grades or more, can be applied to aircraft, railway, naval vessel, automobile system
Make the multiple fields such as industry, tank-making industry.
Specific implementation mode two：A kind of stabilization manufacturing method of high-performance aluminium alloy slab of present embodiment, according to following
Step carries out：
One, it is Si by the mass percent of element in aluminium alloy thick plate：0.6%~1.3%, Fe：1.5%~1.8%,
Cu：1.2%~1.4%, Mn：2.1%~2.4%, Mg：1.1%~1.4%, Cr：1.2%~1.4%, Zn：1.6%~
1.8%, surplus be Al ratio weigh aluminium silicon intermediate alloy, ferro-aluminum intermediate alloy, cathode copper, magnesium manganese intermediate alloy, pure zinc ingot,
Aluminium chromium hardener, aluminium titanium intermediate alloy and aluminium ingot, are then added in dry smelting furnace, are 870 DEG C~877 DEG C in temperature
Under conditions of melting 8h~11h, obtain molten aluminium alloy；
Two, by the molten aluminium alloy of step 1 casting temperature be 823 DEG C~831 DEG C, casting speed be 80mm/min~
By semicontinuous under conditions of 95mm/min, cooling water intensity are 0.51MPa~0.58MPa, cooling water temperature is 10 DEG C~14 DEG C
The aluminium alloy cast ingot that specification is 520mm × 1500mm is made in casting；
Three, it is 647 DEG C~652 the aluminium alloy cast ingot that step 2 obtains to be put into heat-treatment furnace and be heated to metal temperature
DEG C, 640 DEG C~650 DEG C heating 4h~6h of rear constant temperature change 615 DEG C~625 DEG C of constant temperature, keep the temperature 17h~19h, carry out homogenization and move back
Fire processing；
Four, by after the oxide skin on step 3 homogenizing annealing treated aluminium alloy cast ingot mills surface, it is put into heating
Heated in stove, 660 DEG C of constant temperature heat preservation 9h~10h turn 630 DEG C of constant temperature, keep the temperature to the tapping temperature of aluminium alloy cast ingot be 575 DEG C~
583℃；
Five, the aluminium alloy cast ingot after heating step 4 is rolled into the plank that thickness is 13.0mm~15.0mm, obtains heat
Roll boards half-finished product；
Six, the hot rolling boards half-finished product that step 5 obtains is put into glowing furnace and is dissolved, 576 DEG C~581 DEG C heating of constant temperature
47min~54min, then keeps the temperature 61min~69min, then with the transfer time of 24s~31s into 10 DEG C~13 DEG C of water
It is cooled to room temperature, obtains solid solution plank A；
Seven, the solid solution plank A cold-workings for obtaining step 6 obtain cold-working plate at the plank that thickness is 7.5mm~8.5mm
Material；
Eight, the cold-working plank that step 7 obtains is put into glowing furnace, 545 DEG C~551 DEG C heating 56min of constant temperature~
62min keeps the temperature 57min~63min, is used after coming out of the stove cooling in the water for enter 8 DEG C~10 DEG C with the transfer time of 18s~22s；
Nine, the plank that step 8 obtains is put into glowing furnace, 105 DEG C~111 DEG C of constant temperature, heats 22min~29min,
73min~78min is kept the temperature, with the transfer time of 10s~14s into cooling in 8 DEG C~11 DEG C of water after coming out of the stove；
Ten, the plank that step 9 obtains is annealed with heat-treatment furnace, in 178 DEG C~182 DEG C of 180 DEG C of constant temperature and metal temperature
Under conditions of keep the temperature 5.5h~7h；
11, the plank that step 10 obtains is stretched with stretching-machine, amount of tension is 2.6%~2.9%, is stretched
Plank；
12, the stretching plank that step 11 obtains is put into heat-treatment furnace and is heated to 90 DEG C, then in 90 DEG C of constant temperature and
40h~44h is kept the temperature under conditions of 88 DEG C~92 DEG C of metal temperature, under conditions of turning 48 DEG C~52 DEG C of 50 DEG C of constant temperature and metal temperature
2.5h~3h is kept the temperature, high-tensile low yield strength performance aluminium alloy thick plate is obtained.
Constant temperature in present embodiment refers to the temperature of set device.The system of the high-performance aluminium alloy slab of present embodiment
Make single impurity≤0.05% in method, all dirt ranging from≤0.10%, the impurity within the scope of this is to aluminium alloy plate
The performance of material does not influence.
The stabilization manufacturing method of present embodiment high-tensile low yield strength aluminium alloy thick plate, it is strong to have filled up high tensile
Spend the blank of the stabilization manufacturing method of low yield strength aluminium alloy thick plate.Present embodiment selects rational technological process, passes through
Thinning microstructure, raising intensity, toughness, corrosion resistance and fatigue behaviour are achieved the purpose that the control of rolling, heat treatment, stretching.It is logical
The control of Overheating Treatment temperature has achieved the purpose that such plate property is made to stablize.
Specific implementation mode three：Present embodiment is unlike specific implementation mode two：It is thick by aluminium alloy in step 1
The mass percentage Si of element in plate：1.1%, Fe：1.7%, Cu：1.3%, Mn：2.25%, Mg：1.3%, Cr：1.4%,
Zn：1.8%, surplus is that the ratio of Al weighs aluminium silicon intermediate alloy, ferro-aluminum intermediate alloy, cathode copper, magnesium manganese intermediate alloy, pure zinc
Ingot, aluminium chromium hardener, aluminium titanium intermediate alloy and aluminium ingot.Other are the same as one or two specific embodiments.
Specific implementation mode four：Unlike one of present embodiment and specific implementation mode two or three：In step 1
Temperature is melting 10h under conditions of 875 DEG C.Other are identical as specific implementation mode two or three.
Specific implementation mode five：Unlike one of present embodiment and specific implementation mode two to four：It is cast in step 2
Make that temperature is 874 DEG C, casting speed 87mm/min, cooling water intensity are 0.56MPa, cooling water temperature is 12 DEG C.Other with
One of specific implementation mode two to four is identical.
Specific implementation mode six：Unlike one of present embodiment and specific implementation mode one to five：Step 3 is in heat
It is 650 DEG C that metal temperature is heated in treatment furnace, and 645 DEG C of heating 4.5h of rear constant temperature change 619 DEG C of constant temperature, keep the temperature 18h.Other with
One of specific implementation mode one to five is identical.
Specific implementation mode seven：Unlike one of present embodiment and specific implementation mode two to six：It is fixed in step 4
660 DEG C of heat preservation 9.5h of temperature, turn 630 DEG C of constant temperature, and it is 581 DEG C to keep the temperature to the tapping temperature of aluminium alloy cast ingot.Other and specific implementation
One of mode two to six is identical.
Specific implementation mode eight：Unlike one of present embodiment and specific implementation mode two to seven：Add in step 5
Aluminium alloy cast ingot after heat is rolled into the plank that thickness is 14.0mm, obtains hot rolling boards half-finished product.Other and specific implementation mode
One of two to seven is identical.
Specific implementation mode nine：Unlike one of present embodiment and specific implementation mode two to eight：It will in step 6
Hot rolling boards half-finished product, which is put into glowing furnace, to be dissolved, 580 DEG C of constant temperature heating 53min, then keeps the temperature 69min, then when with the transfer of 25s
Between into being cooled to room temperature in 11 DEG C of water.Other are identical as one of specific implementation mode two to eight.
Specific implementation mode ten：Unlike one of present embodiment and specific implementation mode two to nine：It will in step 7
Plank A cold-workings are dissolved into the plank that thickness is 8.0mm, obtain cold-working plank.One of other and specific implementation mode two to nine phase
Together.
Specific implementation mode 11：Unlike one of present embodiment and specific implementation mode two to ten：In step 8
Cold-working plank is put into glowing furnace, and 550 DEG C of heating 60min of constant temperature keep the temperature 61min, enter 9 after coming out of the stove with the transfer time of 19s
DEG C water in it is cooling.Other are identical as one of specific implementation mode two to ten.
Specific implementation mode 12：Present embodiment is unlike specific implementation mode two to one of 11：Step 9
109 DEG C of middle constant temperature heats 23min, keeps the temperature 73min, with the transfer time of 12s into cooling in 10 DEG C of water after coming out of the stove.Other
It is identical as specific implementation mode two to one of 11.
Specific implementation mode 13：Present embodiment is unlike specific implementation mode two to one of 12：Step 10
In keep the temperature 7h under conditions of 180 DEG C of 180 DEG C of constant temperature and metal temperature.Other and two to one of 12 phase of specific implementation mode
Together.
Specific implementation mode 14：Present embodiment is unlike specific implementation mode two to one of 13：Step 10
44h is kept the temperature under conditions of 90 DEG C of 90 DEG C of constant temperature and metal temperature in two, under conditions of turning 50 DEG C of 50 DEG C of constant temperature and metal temperature
Keep the temperature 3h.Other are identical as specific implementation mode two to one of 13.
Beneficial effects of the present invention are verified using following embodiment：
Embodiment one：A kind of stabilization manufacturing method of high-performance aluminium alloy slab, follows the steps below：
One, it is Si by the mass percent of element in aluminium alloy thick plate：1.1%, Fe：1.7%, Cu：1.3%, Mn：
2.25%, Mg：1.3%, Cr：1.4%, Zn：1.8%, the ratio that surplus is Al weighs aluminium silicon intermediate alloy, ferro-aluminum centre is closed
Gold, cathode copper, magnesium manganese intermediate alloy, pure zinc ingot, aluminium chromium hardener, aluminium titanium intermediate alloy and aluminium ingot, are then added to drying
Smelting furnace in, temperature be 875 DEG C under conditions of melting 10h, obtain molten aluminium alloy；
Two, by the molten aluminium alloy of step 1 casting temperature be 872 DEG C, casting speed 87mm/min, cooling water it is strong
The aluminium that specification is 520mm × 1500mm is made by semi-continuous casting method under conditions of degree is 0.56MPa, cooling water temperature is 12 DEG C
Alloy cast ingot；
Three, it is 650 DEG C the aluminium alloy cast ingot that step 2 obtains to be put into heat-treatment furnace and be heated to metal temperature, rear constant temperature
645 DEG C of heating 4.5h, change 619 DEG C of constant temperature, keep the temperature 18h, carry out homogenizing annealing processing；
Four, by after the oxide skin on step 3 homogenizing annealing treated aluminium alloy cast ingot mills surface, it is put into heating
It is heated in stove, 660 DEG C of heat preservation 9.5h of constant temperature turn 630 DEG C of constant temperature, and it is 581 DEG C to keep the temperature to the tapping temperature of aluminium alloy cast ingot；
Five, the aluminium alloy cast ingot after heating step 4 is rolled into the plank that thickness is 14.0mm, obtain hot rolled plate half at
Product；
Six, the hot rolling boards half-finished product that step 5 obtains is put into glowing furnace and is dissolved, 580 DEG C of heating 53min of constant temperature, then
It keeps the temperature 69min, then solid solution plank A is obtained into being cooled to room temperature in 11 DEG C of water with the transfer time of 25s；
Seven, the solid solution plank A cold-workings for obtaining step 6 obtain cold-working plank at the plank that thickness is 8.0mm；
Eight, the cold-working plank that step 7 obtains is put into glowing furnace, 550 DEG C of heating 60min of constant temperature keep the temperature 61min, go out
It is used after stove cooling in the water for enter 9 DEG C with the transfer time of 19s；
Nine, the plank that step 8 obtains is put into glowing furnace, 109 DEG C of constant temperature, heats 23min, kept the temperature 73min, come out of the stove
Entered afterwards with the transfer time of 12s cooling in 10 DEG C of water；
Ten, the plank that step 9 obtains is annealed with heat-treatment furnace, in the condition of 180 DEG C of 180 DEG C of constant temperature and metal temperature
Lower heat preservation 7h；
11, the plank that step 10 obtains is stretched, amount of tension 2.9% with stretching-machine, obtains stretching plank；
12, the stretching plank that step 11 obtains is put into heat-treatment furnace and is heated to 90 DEG C, then in 90 DEG C of constant temperature and
44h is kept the temperature under conditions of 90 DEG C of metal temperature, turns to keep the temperature 3h under conditions of 50 DEG C of 50 DEG C of constant temperature and metal temperature, obtains high tensile
Intensity low yield strength performance aluminium alloy thick plate.
The high-tensile low yield strength performance of the high-performance aluminium alloy slab of the present embodiment is produced better than other aluminium alloys
Product, other mechanical properties, corrosion resisting property and fatigue behaviour are also maintained in preferable performance range, while such highly resistance is determined
The stabilization manufacturing method of tensile strength low yield strength aluminium alloy thick plate has filled up high-tensile low yield strength aluminium alloy thick plate
Stabilization manufacturing method blank.The present embodiment selects rational technological process, by rolling, heat treatment, stretching control
Achieve the purpose that thinning microstructure, improve intensity, toughness, corrosion resistance and fatigue behaviour.Reached by the control of heat treatment temperature
The purpose for making such plate property stablize.Using the present embodiment produced plate face is smooth, thin and thick is uniform, surface smoothness is good,
The aluminum alloy thin slab products that performance is stablized, tensile strength 553MPa~568MPa, yield strength 60MPa~79MPa, elongation percentage
35%~41%, fracture toughness L-T：T-L：Peeling Corrosion reaches P grades or more, can
Applied to multiple fields such as aircraft, railway, naval vessel, auto manufacturing, tank-making industry.
Claims (10)
1. a kind of high-performance aluminium alloy slab, it is characterised in that the aluminium alloy thick plate is the quality hundred by element in aluminium alloy thick plate
Divide than being Si：0.6%~1.3%, Fe：1.5%~1.8%, Cu：1.2%~1.4%, Mn：2.1%~2.4%, Mg：
1.1%~1.4%, Cr：1.2%~1.4%, Zn：1.6%~1.8%, surplus is the ratio of Al by aluminium silicon intermediate alloy, aluminium
Iron intermediate alloy, cathode copper, magnesium manganese intermediate alloy, pure zinc ingot, aluminium chromium hardener, aluminium titanium intermediate alloy and aluminium ingot are made.
2. a kind of stabilization manufacturing method of high-performance aluminium alloy slab, it is characterised in that the preparation method according to the following steps into
Row：
One, it is Si by the mass percent of element in aluminium alloy thick plate：0.6%~1.3%, Fe：1.5%~1.8%, Cu：
1.2%~1.4%, Mn：2.1%~2.4%, Mg：1.1%~1.4%, Cr：1.2%~1.4%, Zn：1.6%~1.8%,
Surplus is that the ratio of Al weighs in aluminium silicon intermediate alloy, ferro-aluminum intermediate alloy, cathode copper, magnesium manganese intermediate alloy, pure zinc ingot, aluminium chromium
Between alloy, aluminium titanium intermediate alloy and aluminium ingot, be then added in dry smelting furnace, be 870 DEG C~877 DEG C of condition in temperature
Lower melting 8h~11h, obtains molten aluminium alloy；
Two, by the molten aluminium alloy of step 1 casting temperature is 823 DEG C~831 DEG C, casting speed is 80mm/min~95mm/
By semi-continuous casting method under conditions of min, cooling water intensity are 0.51MPa~0.58MPa, cooling water temperature is 10 DEG C~14 DEG C
The aluminium alloy cast ingot that specification is 520mm × 1500mm is made；
Three, it is 647 DEG C~652 DEG C the aluminium alloy cast ingot that step 2 obtains to be put into heat-treatment furnace and be heated to metal temperature, after
640 DEG C~650 DEG C heating 4h~6h of constant temperature, change 615 DEG C~625 DEG C of constant temperature, keep the temperature 17h~19h, carry out at homogenizing annealing
Reason；
Four, it by after the oxide skin on step 3 homogenizing annealing treated aluminium alloy cast ingot mills surface, is put into heating furnace
Heating, 660 DEG C of heat preservation 9h~10h of constant temperature, turns 630 DEG C of constant temperature, and it is 575 DEG C~583 to keep the temperature to the tapping temperature of aluminium alloy cast ingot
℃；
Five, the aluminium alloy cast ingot after heating step 4 is rolled into the plank that thickness is 13.0mm~15.0mm, obtains hot rolled plate
Semi-finished product；
Six, the hot rolling boards half-finished product that step 5 obtains is put into glowing furnace and is dissolved, 576 DEG C~581 DEG C heating 47min of constant temperature~
54min, then keeps the temperature 61min~69min, then with the transfer time of 24s~31s into being cooled to room in 10 DEG C~13 DEG C of water
Temperature obtains solid solution plank A；
Seven, the solid solution plank A cold-workings for obtaining step 6 obtain cold-working plank at the plank that thickness is 7.5mm~8.5mm；
Eight, the cold-working plank that step 7 obtains is put into glowing furnace, 545 DEG C~551 DEG C heating 56min~62min of constant temperature are protected
Warm 57min~63min is used cooling in the water for enter 8 DEG C~10 DEG C with the transfer time of 18s~22s after coming out of the stove；
Nine, the plank that step 8 obtains is put into glowing furnace, 105 DEG C~111 DEG C of constant temperature, heats 22min~29min, heat preservation
73min~78min, with the transfer time of 10s~14s into cooling in 8 DEG C~11 DEG C of water after coming out of the stove；
Ten, the plank that step 9 obtains is annealed with heat-treatment furnace, in 180 DEG C of constant temperature and the item of 178 DEG C~182 DEG C of metal temperature
5.5h~7h is kept the temperature under part；
11, the plank that step 10 obtains is stretched with stretching-machine, amount of tension is 2.6%~2.9%, obtains drawing plate
Material；
12, the stretching plank that step 11 obtains is put into heat-treatment furnace and is heated to 90 DEG C, then in 90 DEG C of constant temperature and metal
40h~44h is kept the temperature under conditions of 88 DEG C~92 DEG C of temperature, turns to keep the temperature under conditions of 48 DEG C~52 DEG C of 50 DEG C of constant temperature and metal temperature
2.5h~3h obtains high-tensile low yield strength performance aluminium alloy thick plate.
3. a kind of stabilization manufacturing method of high-performance aluminium alloy slab according to claim 2, it is characterised in that step 1
In by element in aluminium alloy thick plate mass percentage Si：1.1%, Fe：1.7%, Cu：1.3%, Mn：2.25%, Mg：
1.3%, Cr：1.4%, Zn：1.8%, surplus is that the ratio of Al weighs aluminium silicon intermediate alloy, ferro-aluminum intermediate alloy, cathode copper, magnesium
Manganese intermediate alloy, pure zinc ingot, aluminium chromium hardener, aluminium titanium intermediate alloy and aluminium ingot.
4. a kind of stabilization manufacturing method of high-performance aluminium alloy slab according to claim 2, it is characterised in that step 1
In under conditions of temperature is 875 DEG C melting 10h.
5. a kind of stabilization manufacturing method of high-performance aluminium alloy slab according to claim 2, it is characterised in that step 2
Middle casting temperature is 824 DEG C, casting speed 87mm/min, cooling water intensity are 0.56MPa, cooling water temperature is 12 DEG C.
6. a kind of stabilization manufacturing method of high-performance aluminium alloy slab according to claim 2, it is characterised in that step 3
It is 650 DEG C that metal temperature is heated in heat-treatment furnace, and 645 DEG C of heating 4.5h of rear constant temperature change 619 DEG C of constant temperature, keep the temperature 18h.
7. a kind of stabilization manufacturing method of high-performance aluminium alloy slab according to claim 2, it is characterised in that step 4
660 DEG C of heat preservation 9.5h of middle constant temperature, turn 630 DEG C of constant temperature, and it is 581 DEG C to keep the temperature to the tapping temperature of aluminium alloy cast ingot.
8. a kind of stabilization manufacturing method of high-performance aluminium alloy slab according to claim 2, it is characterised in that step 5
Aluminium alloy cast ingot after middle heating is rolled into the plank that thickness is 14.0mm, obtains hot rolling boards half-finished product.
9. a kind of stabilization manufacturing method of high-performance aluminium alloy slab according to claim 2, it is characterised in that step 6
Middle hot rolling boards half-finished product is put into glowing furnace is dissolved, then 580 DEG C of heating 53min of constant temperature are kept the temperature 69min, then turned with 25s
Shift time is into being cooled to room temperature in 11 DEG C of water.
10. a kind of stabilization manufacturing method of high-performance aluminium alloy slab according to claim 2, it is characterised in that step 7
It is middle to be dissolved plank A cold-workings into the plank that thickness is 8.0mm, obtain cold-working plank.
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| CN113798321A (en) * | 2021-09-11 | 2021-12-17 | 百色学院 | Aluminum alloy thick plate and manufacturing method thereof |
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