CN109295362A - A kind of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy and its processing technology - Google Patents
A kind of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy and its processing technology Download PDFInfo
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- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
The present invention provides a kind of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloys, and by weight percentage, composition includes: 8.3~11wt.% of Zn, 0.08~0.16wt.% of Mg 2.0~3.0wt.%, Cu 1.7~2.7wt.%, Zr, 0.03~0.2wt.% of Cr, Ni 0.03~0.11wt.%, Ti 0.01~0.03wt.%, Si < 0.1wt.%, Fe < 0.15wt.%, every kind of inevitable impurity element is less than 0.05wt.%, and total amount is less than 0.15wt.%, surplus Al.The present invention also provides a kind of processing technologys of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy.A kind of processing technology of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy provided by the invention, tensile strength 730-830MPa, yield strength 650-750MPa, elongation percentage 7-10% of the ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy of production after fixation rates.
Description
Technical field
The present invention relates to technical field of aluminum alloy technology, in particular to a kind of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy and its
Processing technology.
Background technique
Aluminium alloy is small with density, light-weight, specific strength is high, specific stiffness is high and has good stabilization under conventional environment
The advantages such as property, are the preferred structural materials of airframe.The development trend of aircraft is high speed, high motor-driven, safe and reliable, low knot
Structure weight coefficient, low cost and synthesis are stealthy.There is bigger strength margin in the promotion inevitable requirement component design of aeroplane performance,
Therefore the intensity for improving organism material is the inevitable requirement of aircraft development.
Since the 21th century, China in order to meet aircraft manufacturing reality need and future aircraft development, carry out
High Purity research to aluminium alloys such as 7A04,2A70,2A12,2A06, has also carried out 7A55 aluminium alloy strong to superelevation at the same time
And the research, etc. to T77 state material.By the development of recent decades, no matter China's aluminium processing industry is from equipment capability
Or it is all greatly shortened from working ability and world-class gap.But novel aluminum alloy, especially aircraft are used
The R and D of ultra-high-strength/tenacity aluminum alloy, still in amiable experimental stage, either (such as novel alloy is set basic theory
Meter, alloy Study on Strengthening and Toughening etc.), technology (such as ingot casting technology of preparing, deformation technology, heat treatment technics) is ground
Study carefully or technical equipment and its degree of perfection with the world it is top it is horizontal compared with there is also certain gaps.Therefore, superelevation is strong
Tenacity aluminum alloy is the focus and emphasis of the research of current aluminium manufacture field.
Summary of the invention
Technical problem to be solved by the invention is to provide the relatively high superelevation of a kind of tensile strength and yield strength is strong
High-toughness Al-Zn-Mg-Cu aluminum alloy and its processing technology.
In order to solve the above technical problems, the present invention provides a kind of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloys, with weight
Percentages, composition include: 8.3~11wt.% of Zn, Mg 2.0~3.0wt.%, Cu 1.7~2.7wt.%, Zr 0.08
~0.16wt.%, Cr 0.03~0.2wt.%, Ni 0.03~0.11wt.%, Ti 0.01~0.03wt.%, Si <
0.1wt.%, Fe < 0.15wt.%, every kind of inevitable impurity element is less than 0.05wt.%, and total amount is less than 0.15wt.%,
Surplus is Al.
Further, the purity of the pure metallic aluminum, pure metal magnesium and pure metal copper is 99.8wt.%.
Further, the content of the Al-Zr intermediate alloy is Zr:3-5wt%, surplus Al；It is closed among the Al-Cr
The content of gold is Cr:3-5wt%, surplus Al；The Al-Ni intermediate alloy content is Ni:8-10wt%, surplus Al；Institute
The content for stating Al-Ti intermediate alloy is Ti:8-10wt%, surplus Al.
The present invention also provides a kind of processing technologys of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy, include the following steps:
Raw material is prepared: in pure metallic aluminum, pure metal zinc, pure metal copper, pure metal magnesium, Al-Zr intermediate alloy, Al-Cr
Between alloy, Al-Ni intermediate alloy, Al-Ti intermediate alloy as raw material, stock up, by weight percentage, the raw material at
It part include: 8.3~11wt.% of Zn, Mg 2.0~3.0wt.%, Cu 0.08~0.16wt.% of 1.7~2.7wt.%, Zr,
Cr 0.03~0.2wt.%, Ni 0.03~0.11wt.%, Ti 0.01~0.03wt.%, Si < 0.1wt.%, Fe <
0.15wt.%, every kind of inevitable impurity element is less than 0.05wt.%, and total amount is less than 0.15wt.%, surplus Al, described
Pure metallic aluminum, the purity of pure metal magnesium and pure metal copper be 99.8wt.%；The content of the Al-Zr intermediate alloy is
Zr:3-5wt%, surplus Al；The content of Al-Cr intermediate alloy is Cr:3-5wt%, surplus Al；Al-Ni intermediate alloy contains
Amount is Ni:8-10wt%, surplus Al；The content of Al-Ti intermediate alloy is Ti:8-10wt%, surplus Al；
Alloy melting and casting: it will be closed among the pure metallic aluminum, Al-Zr intermediate alloy, Al-Cr intermediate alloy, Al-Ni
The fusing of reflective aluminium melting furnace is added in gold, Al-Ti intermediate alloy, and the pure metal copper is then added, and is warming up to 730-740 DEG C, then
The pure metal zinc and pure metal magnesium is added, 740-750 DEG C is warming up to after metal molten, carries out refining treatment；Refining treatment
Alloy melt is stirred afterwards and fishes out the dross for going to alloy melt surface after 730 DEG C of standing 10-20min, standing, then passes through half
Continuous casting process is cast, and applies electromagnetic agitation in crystal region in casting process to refine crystal grain；
Homogenization Treatments: homogeneous point two-stage carries out, and makes Cast residual structure Phase Proportion 1.5% hereinafter, maximum last phase
Size is less than 50 μm；
Hot extrusion: using the reversed Isothermal Extrusion of two-stage, controls squeeze wood outlet temperature less than 440 DEG C, outlet temperature is along crowded
Press length direction fluctuation less than 10 DEG C；
Solid solution is handled with artificial aging: carrying out the solution treatment that 3-6 hours are kept the temperature at 465 DEG C, quenching shift time is less than
15 seconds, hardening media was softened water, 30-60 DEG C of water temperature, then carried out the processing of second level artificial aging.
Further, the casting temperature is 710 DEG C -730 DEG C.
Further, the field frequency 15-30Hz of the electromagnetic agitation, exciting current 100-200A.
Further, 455-485 DEG C of the homogenizing temperature, homogenizing time 16-36 hours, second level homogenizing temperature was than first
Grade is 5-15 DEG C high, and second level homogenizing time is the 20-30% of first order homogenizing time.
Further, 380-440 DEG C of casting rod heating temperature in the hot extrusion process, 400-450 DEG C of extrusion cylinder temperature are squeezed
380-440 DEG C of compression mould heating temperature, the first order squeeze extrusion ratio 4-10, second level extrusion ratio 10-40.
Further, described 105-115 DEG C of first order aging temp, aging time 6-12 hours, second level aging temp
135-165 DEG C, aging time 3-10 hours.
Further, tensile strength 730-830MPa, the yield strength 650-750MPa after the aluminum alloy solution timeliness,
Elongation percentage 7-10%.
Ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy provided by the invention and its processing technology, use in casting process
Electro-magntic Casting controls the crystallite dimension in casting process, in the tissue for fundamentally improving alloy；In Homogenization Treatments rank
Section guarantees the control of as cast condition remnants Phase Proportion 1.5% hereinafter, improving the satiety of alloy solute using bipolar Homogenization Treatments
And degree, also further reduce the remaining phase area in As-cast Microstructure；In the hot extrusion stage, the side squeezed using twin-stage
Formula further reduces the crystallite dimension of Deformation structure after squeezing, to improve the intensity of alloy；In solid solution and timeliness rank
Section is handled using high temperature solid solution and two-stage time effect, further increases the aging strength of alloy after heat treatment, what final production obtained
The tensile strength 730-830MPa of ultra-high-strength/tenacity aluminum alloy, yield strength 650-750MPa, elongation percentage 7-10% have excellent
Comprehensive performance, can be suitable for needing in high-intensitive light structures part.
Detailed description of the invention
Fig. 1 is the processing process figure of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy provided in an embodiment of the present invention.
Specific embodiment
Referring to Fig. 1, a kind of processing technology of ultra-high-strength/tenacity Al-Zn-Mg-Cu alloy provided in an embodiment of the present invention, packet
Include following steps:
(1) raw material is prepared: with pure metallic aluminum, pure metal zinc, pure metal copper, pure metal magnesium, Al-Zr intermediate alloy, Al-Cr
Intermediate alloy, Al-Ni intermediate alloy, Al-Ti intermediate alloy are stocked up as raw material.
(2) alloy melting and casting: carrying out melting in reflective aluminium melting furnace, by pure metallic aluminum, Al-Zr intermediate alloy,
Al-Cr intermediate alloy, Al-Ni intermediate alloy, Al-Ti intermediate alloy are added in furnace simultaneously to be melted, and pure metal copper is added after fusing,
It is warming up to 730-740 DEG C, pure metal zinc and pure metal magnesium is added, be warming up to 740- to these metal moltens and after mixing evenly
Refining treatment is carried out using refining agent after 750 DEG C；Alloy melt is stirred after being disposed and in 730 DEG C of standing 10-20min, it is quiet
The dross on alloy melt surface is removed in fishing after setting, and is then cast by semi-continuous casting method, casting temperature for 710 DEG C-
730℃；Apply electromagnetic agitation in crystal region to refine crystal grain, field frequency 15-30Hz, exciting current 100-200A.
The purity of the pure metallic aluminum, pure metal magnesium and pure metal copper is 99.8wt.%；
The content of the Al-Zr intermediate alloy is Zr:3-5wt%, surplus Al；The content of Al-Cr intermediate alloy is
Cr:3-5wt%, surplus Al；Al-Ni intermediate alloy content is Ni:8-10wt%, surplus Al；Al-Ti intermediate alloy contains
Amount is Ti:8-10wt%, surplus Al.
(3) Homogenization Treatments: 455-485 DEG C of homogenizing temperature, homogenizing time 16-36 hours；Homogeneous point two-stage carries out, and second
Grade homogenizing temperature is 5-15 DEG C higher than the first order, and second level homogenizing time is the 20-30% of first order homogenizing time；Homogenizing effect needs
Guarantee Cast residual structure Phase Proportion 1.5% hereinafter, maximum remnants phase size is less than 50 μm.
(4) the reversed Isothermal Extrusion of two-stage, 380-440 DEG C of casting rod heating temperature, extrusion cylinder temperature 400- hot extrusion: are used
450 DEG C, 380-440 DEG C of extrusion die heating temperature；The first order squeezes extrusion ratio 4-10, second level extrusion ratio 10-40；By squeezing
The cooperation of temperature, extrusion speed is pressed, controls squeeze wood outlet temperature less than 440 DEG C, outlet temperature is fluctuated along extruded length direction
Less than 10 DEG C.
(5) solid solution is handled with artificial aging: in 465 DEG C of heat preservations progress solution treatment in 3-6 hours, quenching shift time is less than
15 seconds, hardening media was softened water, 30-60 DEG C of water temperature；Artificial aging processing, first order aging temp 105- are carried out after quenching
115 DEG C, aging time 6-12 hours, 135-165 DEG C of second level aging temp, aging time 3-10 hours.
Embodiment 1
Raw material is prepared: alloying component Zn:9.5wt.%, Mg:2.8wt.%, Cu:2.6wt.%, Zr:0.15wt.%,
Cr:0.03wt.%, Ni:0.06%, Ti:0.02wt.%, Si: < 0.1wt.%, Fe: < 0.15wt.%, other are inevitably
Every kind of impurity element is less than 0.05wt.%, and total amount is less than 0.15wt.%, surplus Al.With pure metallic aluminum, pure metal zinc, pure
Metallic copper, pure metal magnesium, Al-Zr intermediate alloy, Al-Cr intermediate alloy, Al-Ni intermediate alloy, Al-Ti intermediate alloy are as former
Material, stocks up.
Alloy melting and casting: carrying out melting in reflective aluminium melting furnace, by pure metallic aluminum, Al-Zr intermediate alloy, Al-
Cr intermediate alloy, Al-Ni intermediate alloy, Al-Ti intermediate alloy are added in furnace simultaneously to be melted, and pure metal copper is added after fusing, is risen
Pure metal zinc and pure metal magnesium is added to 730-740 DEG C in temperature, add when magnesium metal will by pressure cover by MAG block be completely forced into liquid level with
Under；Refining treatment is carried out using refining agent after being warming up to 740-750 DEG C after these metal moltens and after mixing evenly, refining agent is used
Measure 2kg aluminium per ton；Stirring alloy melt after being disposed and fishing out after 730 DEG C of standing 10-20min, standing goes alloy molten
The dross in body surface face, is then cast by semi-continuous casting method, and casting temperature is 710 DEG C, casting rod diameter 310mm；It is tying
Crystalline region applies electromagnetic agitation to refine crystal grain, field frequency 20Hz, exciting current 150A.
The purity of the pure metallic aluminum, pure metal magnesium and pure metal copper is 99.8wt.%；
The content of the Al-Zr intermediate alloy is Zr:3-5wt%, surplus Al；The content of Al-Cr intermediate alloy is
Cr:3-5wt%, surplus Al；Al-Ni intermediate alloy content is Ni:8-10wt%, surplus Al；Al-Ti intermediate alloy contains
Amount is Ti:8-10wt%, surplus Al.
Casting rod Homogenization Treatments: casting rod carries out two-stage Homogenization Treatments, can just non-equilibrium phase be made to fill by Homogenization Treatments
The uniformity for dividing dissolution, eliminating microsegregation, improving composition, in favor of subsequent extrusion deformation.Homogenization temperature is too low cannot
Guarantee effect, and homogenization temperature is excessively high, is easy to produce burning and material is made to become waste product.Two-stage homogenization can guarantee
Burning is avoided while obtaining good homogenizing effect.465 DEG C of first order temperature, soaking time 26 hours, second level homogenizing temperature
480 DEG C of temperature, homogenizing time 6 hours；Sample detection last phase area ratio is 1.3% after homogeneous, and maximum remnants phase size is small
In 30 μm.
Hot extrusion: use the reversed Isothermal Extrusion of two-stage, 410 DEG C of casting rod heating temperature, 430 DEG C of extrusion cylinder temperature, extrusion die
400 DEG C of heating temperature of tool；The first order squeezes extrusion ratio 9, squeezes finished diameter 100mm；It is straight to squeeze finished product for second level extrusion ratio 39
Diameter 16mm；By squeezing the cooperation of temperature, extrusion speed, squeeze wood outlet temperature is controlled less than 440 DEG C, outlet temperature is along extruding
Length direction is fluctuated less than 10 DEG C.
Solid solution is handled with artificial aging: (1) in 465 DEG C of heat preservations progress solution treatment in 3 hours, quenching shift time is less than 15
Second, hardening media is softened water, 40 DEG C of water temperature；(2) progress two-stage ageing treatment after quenching, 110 DEG C of first order aging temp, when
The effect time 16 hours, 140 DEG C of second level aging temp, aging time 4 hours.
The processing of ultra-high-strength/tenacity aluminum alloy, the tension of the ultra-high-strength/tenacity aluminum alloy of preparation are realized by above step
Intensity 765Mpa, yield strength 710MPa, elongation percentage 8%.
Embodiment 2
Raw material is prepared: alloying component Zn:8.3wt.%, Mg:2.2wt.%, Cu:2.0wt.%, Zr:0.15wt.%,
Cr:0.06wt.%, Ni:0.08%, Ti:0.02wt.%, Si: < 0.1wt.%, Fe: < 0.15wt.%, other are inevitably
Every kind of impurity element is less than 0.05wt.%, and total amount is less than 0.15wt.%, surplus Al.With pure metallic aluminum, pure metal zinc, pure
Metallic copper, pure metal magnesium, Al-Zr intermediate alloy, Al-Cr intermediate alloy, Al-Ni intermediate alloy, Al-Ti intermediate alloy are as former
Material, stocks up.
Alloy melting and casting: carrying out melting in reflective aluminium melting furnace, by pure metallic aluminum, Al-Zr intermediate alloy, Al-
Cr intermediate alloy, Al-Ni intermediate alloy, Al-Ti intermediate alloy are added in furnace simultaneously to be melted, and pure metal copper is added after fusing, is risen
Pure metal zinc and pure metal magnesium is added to 730 DEG C in temperature, and liquid level or less will be completely forced into for MAG block by pressure cover when magnesium metal by adding；
Refining treatment is carried out using refining agent after being warming up to 750 DEG C after these metal moltens and after mixing evenly, refining agent dosage 2kg is every
Ton aluminium；Alloy melt is stirred after being disposed and is fished out after 730 DEG C of standing 15min, standing goes the floating of alloy melt surface
Then slag is cast by semi-continuous casting method, casting temperature is 710 DEG C, casting rod diameter 310mm；Apply electricity in crystal region
Magnetic is stirred to refine crystal grain, field frequency 20Hz, exciting current 150A.
The purity of the pure metallic aluminum, pure metal magnesium and pure metal copper is 99.8wt.%；
The content of the Al-Zr intermediate alloy is Zr:3-5wt%, surplus Al；The content of Al-Cr intermediate alloy is
Cr:3-5wt%, surplus Al；Al-Ni intermediate alloy content is Ni:8-10wt%, surplus Al；Al-Ti intermediate alloy contains
Amount is Ti:8-10wt%, surplus Al.
Casting rod Homogenization Treatments: casting rod carries out two-stage Homogenization Treatments, can just non-equilibrium phase be made to fill by Homogenization Treatments
The uniformity for dividing dissolution, eliminating microsegregation, improving composition, in favor of subsequent extrusion deformation.Homogenization temperature is too low cannot
Guarantee effect, and homogenization temperature is excessively high, is easy to produce burning and material is made to become waste product.Two-stage homogenization can guarantee
Burning is avoided while obtaining good homogenizing effect.465 DEG C of first order temperature, soaking time 26 hours, second level homogenizing temperature
480 DEG C of temperature, homogenizing time 6 hours；Sample detection last phase area ratio is 1.3% after homogeneous, and maximum remnants phase size is small
In 30 μm.
Hot extrusion: use the reversed Isothermal Extrusion of two-stage, 410 DEG C of casting rod heating temperature, 430 DEG C of extrusion cylinder temperature, extrusion die
400 DEG C of heating temperature of tool；The first order squeezes extrusion ratio 4, squeezes finished diameter 150mm；It is straight to squeeze finished product for second level extrusion ratio 36
Diameter 25mm；By squeezing the cooperation of temperature, extrusion speed, squeeze wood outlet temperature is controlled less than 440 DEG C, outlet temperature is along extruding
Length direction is fluctuated less than 10 DEG C.
Solid solution is handled with artificial aging: (1) in 465 DEG C of heat preservations progress solution treatment in 3 hours, quenching shift time is less than 15
Second, hardening media is softened water, 40 DEG C of water temperature；(2) progress two-stage ageing treatment after quenching, 110 DEG C of first order aging temp, when
The effect time 16 hours, 135 DEG C of second level aging temp, aging time 4 hours.
The processing of ultra-high-strength/tenacity aluminum alloy, the tension of the ultra-high-strength/tenacity aluminum alloy of preparation are realized by above step
Intensity 730MPa, yield strength 660MPa, elongation percentage 10%.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. a kind of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy, which is characterized in that by weight percentage, composition includes: Zn
8.3~11wt.%, Mg 2.0~3.0wt.%, Cu 1.7~2.7wt.%, Zr 0.08~0.16wt.%, Cr 0.03~
0.2wt.%, Ni 0.03~0.11wt.%, Ti 0.01~0.03wt.%, S i < 0.1wt.%, Fe < 0.15wt.%, can not
Every kind of impurity element is avoided to be less than 0.05wt.%, and total amount is less than 0.15wt.%, surplus Al.
2. ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy according to claim 1, it is characterised in that: the pure metal
The purity of aluminium, pure metal magnesium and pure metal copper is 99.8wt.%.
3. ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy according to claim 1, it is characterised in that: among the Al-Zr
The content of alloy is Zr:3-5wt%, surplus Al；The content of the Al-Cr intermediate alloy is Cr:3-5wt%, surplus Al；
The Al-Ni intermediate alloy content is Ni:8-10wt%, surplus Al；The content of the Al-Ti intermediate alloy is Ti:8-
10wt%, surplus Al.
4. a kind of processing technology of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy, which comprises the steps of:
Raw material is prepared: to close among pure metallic aluminum, pure metal zinc, pure metal copper, pure metal magnesium, Al-Zr intermediate alloy, Al-Cr
Gold, Al-Ni intermediate alloy, Al-Ti intermediate alloy are stocked up as raw material, by weight percentage, the raw material composition packet
It includes: Zn 8.3~11wt.%, Mg 2.0~3.0wt.%, Cu 1.7~2.7wt.%, Zr 0.08~0.16wt.%, Cr
0.03~0.2wt.%, Ni 0.03~0.11wt.%, Ti 0.01~0.03wt.%, Si < 0.1wt.%, Fe <
0.15wt.%, every kind of inevitable impurity element is less than 0.05wt.%, and total amount is less than 0.15wt.%, surplus Al, described
Pure metallic aluminum, the purity of pure metal magnesium and pure metal copper be 99.8wt.%；The content of the Al-Zr intermediate alloy is
Zr:3-5wt%, surplus Al；The content of Al-Cr intermediate alloy is Cr:3-5wt%, surplus Al；Al-Ni intermediate alloy contains
Amount is Ni:8-10wt%, surplus Al；The content of Al-Ti intermediate alloy is Ti:8-10wt%, surplus Al；
Alloy melting and casting: by the pure metallic aluminum, Al-Zr intermediate alloy, Al-Cr intermediate alloy, Al-Ni intermediate alloy,
Reflective aluminium melting furnace fusing is added in Al-Ti intermediate alloy, and the pure metal copper is then added, is warming up to 730-740 DEG C, adds
The pure metal zinc and pure metal magnesium are warming up to 740-750 DEG C after metal molten, carry out refining treatment；It is stirred after refining treatment
It mixes alloy melt and fishes out the dross for going to alloy melt surface after 730 DEG C of standing 10-20min, standing, then by semicontinuous
Casting is cast, and applies electromagnetic agitation in crystal region in casting process to refine crystal grain；
Homogenization Treatments: homogeneous point two-stage carries out, and makes Cast residual structure Phase Proportion 1.5% hereinafter, maximum remnants phase size
Less than 50 μm；
Hot extrusion: using the reversed Isothermal Extrusion of two-stage, controls squeeze wood outlet temperature less than 440 DEG C, outlet temperature is along extruding length
Direction fluctuation is spent less than 10 DEG C；
Solid solution is handled with artificial aging: carry out keeping the temperature solution treatment in 3-6 hours at 465 DEG C, quenching shift time less than 15 seconds,
Hardening media is softened water, 30-60 DEG C of water temperature, then carries out the processing of second level artificial aging.
5. the processing technology of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy according to claim 4, it is characterised in that: institute
Stating casting temperature is 710 DEG C -730 DEG C.
6. the processing technology of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy according to claim 4, it is characterised in that: institute
State the field frequency 15-30Hz of electromagnetic agitation, exciting current 100-200A.
7. the processing technology of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy according to claim 4, it is characterised in that: institute
455-485 DEG C of homogenizing temperature is stated, homogenizing time 16-36 hours, second level homogenizing temperature was 5-15 DEG C higher than the first order, and the second level is equal
The matter time is the 20-30% of first order homogenizing time.
8. the processing technology of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy according to claim 4, it is characterised in that: institute
State 380-440 DEG C of casting rod heating temperature in hot extrusion process, 400-450 DEG C of extrusion cylinder temperature, extrusion die heating temperature 380-
440 DEG C, the first order squeezes extrusion ratio 4-10, second level extrusion ratio 10-40.
9. the processing technology of ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloy according to claim 4, it is characterised in that: institute
State 105-115 DEG C of first order aging temp, aging time 6-12 hours, 135-165 DEG C of second level aging temp, aging time 3-
10 hours.
10. -9 described in any item ultra-high-strength/tenacity Al-Zn-Mg-Cu aluminium alloys according to claim 1, it is characterised in that: described
Tensile strength after aluminum alloy solution timeliness is 730-830MPa, yield strength 650-750MPa, elongation percentage 7-10%.
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Cited By (5)
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| CN110863128A (en) * | 2019-12-28 | 2020-03-06 | 东北轻合金有限责任公司 | Preparation method of 640 MPa-grade aluminum alloy extruded material for aviation |
| CN111945047A (en) * | 2020-08-18 | 2020-11-17 | 山东南山铝业股份有限公司 | Aluminum alloy section bar for floor beam of passenger cabin of civil aircraft and preparation method thereof |
| CN112981196A (en) * | 2021-02-10 | 2021-06-18 | 北京科技大学 | Ultrahigh-strength and high-toughness Al-Zn-Mg-Cu aluminum alloy and preparation method thereof |
| CN114875268A (en) * | 2022-05-27 | 2022-08-09 | 安徽佳晟金属科技有限公司 | Aluminum alloy bar and production process thereof |
| CN115505806A (en) * | 2022-10-21 | 2022-12-23 | 山东南山铝业股份有限公司 | High-strength and high-toughness wrought aluminum alloy and preparation method thereof |
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| CN110863128A (en) * | 2019-12-28 | 2020-03-06 | 东北轻合金有限责任公司 | Preparation method of 640 MPa-grade aluminum alloy extruded material for aviation |
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| CN115505806A (en) * | 2022-10-21 | 2022-12-23 | 山东南山铝业股份有限公司 | High-strength and high-toughness wrought aluminum alloy and preparation method thereof |
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