CN110527881A - It is a kind of quickly to solidify high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy and preparation method thereof - Google Patents
It is a kind of quickly to solidify high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy and preparation method thereof Download PDFInfo
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Abstract
It is a kind of quickly to solidify high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy and preparation method thereof, by mass percentage, including following component: Zn 18-28%, Mg 1.0-3.0%, Cu 1.0-2.0%, Zr 0.05-0.2%, inevitable impurity content is less than 0.2%, Al is surplus, it comprises the following steps: by commercial-purity aluminium, after crucible melting is added in fine copper, sequentially add industrial-purity zinc, Al-10Zr intermediate alloy and technical pure Mg, until all fusings, melt is stirred with magnetic stirrer, after 700-720 DEG C of heat preservation 15-20min, alloy solution is sprayed to high-speed rotating roller, it is rapidly solidificated into band；Band crushing will be quickly solidified, using the static pressure mode base such as cold heat, hot-pressing densification；By alloy blank heating, heat preservation, hot extrusion molding.The present invention effectively inhibits alloying component segregation, coarse precipitated phase to be formed, and improves the solid solubility of alloying element, refines crystal grain, and then prepare high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy；The application prospect of high zinc content Al-Zn based alloy can be widened.
Description
Technical field
The present invention relates to aluminum alloy materials fields, specifically, being related to a kind of quickly solidification high-performance high zinc content Al-
Zn-Mg-Cu-Zr alloy and preparation method thereof.
Background technique
Al-Si cast aluminium alloy gold is widely used in aerospace and vapour because its density is low, wearability and good casting property
Vehicle manufacturing field.But due to the presence of the brittlement phase containing Si, cause the intensity of Al-Si alloy low, plasticity is poor, it is difficult to meet high-strength
Spend the demand of structural member.For Al-Si alloy, Gao Xin Al-Zn alloy, because solid solubility of the Zn in Al is big, alloy is molten
The low, good fluidity of point, has higher intensity and better plasticity.In addition, high zinc Al-Zn alloy also has good rub resistance
Polishing machine, the wearing pieces such as alternative bronze production bearing, bearing shell.
Currently, the application report in relation to high zinc Al-Zn alloy, is concentrated mainly on the high zinc Al-Zn alloy of binary and ternary is high
The research of zinc Al-Zn-Sc and Al-Zn-Cu alloy.It is 20- as patent CN107058828A provides a kind of Zn mass percent
35%, surplus is the Al-Zn bianry alloy of Al, and alloy is smelting, casts, roll forming after solution treatment, is had preferable strong
Degree and plasticity, alloy the maximum tensile strength are 450MPa.Rare element Sc can effective refining aluminum alloy crystal grain, promote alloy mechanics
Performance, the mass percent that patent CN107058829A provides a kind of Zn is 20-35%, and the mass percent of Sc is 0.25-
0.5%, surplus is the Al-Zn-Sc ternary alloy three-partalloy of Al.The alloy is smelting, roll forming after solution treatment of casting, and alloy is most
Big tensile strength reaches 470MPa.Although the addition of rare element Sc is so that the mechanical property of alloy gets a promotion, because dilute
There is element storage capacity few, it is expensive, it is therefore necessary to seek the mechanics that more cheap member usually promotes high zinc Al-Zn alloy
Performance.
Mg, Cu, Zr are elements common in aluminium alloy, and relative low price, Mg and Zn form MgZn2Hardening constituent (η phase),
Cu and Al easily form Al2Cu hardening constituent (θ phase), Zr form Al in conjunction with Al3Zr plays Grain refinement.Therefore, the present invention examines
Consider and adds the common alloys elements such as Mg, Cu, Zr in high zinc content Al-Zn alloy.So far, related containing high zinc content
Al-Zn-Mg-Cu-Zr alloy has no application report.
The Al-Zn-Mg-Cu alloy of traditional casting and deformation technique production, wherein the alloying elements such as Zn, Mg, Cu is total
Content is usually no more than 12%-13% (wt%), is such as more than this boundary, and a large amount of coarse second phase will be precipitated along crystal boundary, lead
It causes the strength of materials and toughness to reduce, is unfavorable for material property promotion.Alloy member can be improved because cooling rate is fast in flash set technology
The solid solubility of element, inhibits the formation of coarse precipitated phase, refines crystal grain, can be used to prepare conventional means can not be prepared have it is special
The material of ingredient and excellent in mechanical performance.
When preparing high zinc Al-Zn alloy using conventional fusion-cast method, because aluminium, zinc weight proportion and fusing point differ larger, therefore solidify
It is also easy to produce component segregation and dispersed shrinkage cavity in the process.Flash set technology can both reduce component segregation, also can inhibit dispersibility
The generation of shrinkage cavity.
Therefore, based on the deficiencies of the prior art, the present invention discloses a kind of quickly solidification high-performance high zinc content Al-Zn-Mg-
Cu-Zr alloy and preparation method thereof is conducive to expand high zinc content Al-Zn base wrought aluminium alloy application prospect.
Summary of the invention
The present invention overcomes the disadvantages of the prior art, provides a kind of quickly solidification high-performance high zinc content Al-Zn-
Mg-Cu-Zr alloy and preparation method thereof improves the solid solubility of alloy by using flash set technology, inhibits coarse precipitation
The formation of phase reduces component segregation, refines crystal grain, and then prepare the high zinc content Al-Zn-Mg- with higher-strength and toughness
Cu-Zr alloy.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions:
A kind of quickly solidification high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy, by mass percentage, including such as the following group
Point: Zn 18-28%, Mg 1.0-3.0%, Cu 1.0-2.0%, Zr0.05-0.2%, inevitable impurity content are less than
0.2%, Al are surplus.
A kind of preparation method of quick solidification high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy, comprises the following steps:
(1) by mass percentage, after crucible melting being added in commercial-purity aluminium, fine copper, industrial-purity zinc, Al- are sequentially added
10Zr intermediate alloy and technical pure Mg, until all fusing, melt are stirred with blender, 700-720 DEG C of heat preservation 15-
After 20min, alloy solution is sprayed to high-speed rotating roller, band is rapidly solidificated into；
(2) band crushing will be quickly solidified, using cold heat isostatic pressing base, hot-pressing densification；
(3) alloy blank is heated to 350-450 DEG C, keeps the temperature 30-60min, hot extrusion molding.
Further, purity >=99.7% of the commercial-purity aluminium, purity >=99.5% of the industrial-purity zinc, the industry
Purity >=99.95% of fine copper, purity >=99.90% of the pure magnesium, the source of the Zr are to close among Al-10Zr
Gold.
Further, in step (1), alloy solution is ejected on high-speed rotating roller by nozzle, is quickly solidified as thin
Crystal zone material, thickness of strip are 70-120 μm, width 3-4mm, and average grain size is 2-5 μm.
Further, the nozzle diameter is 1-3.5mm, and nozzle to copper roll spacing is from for 2-16mm.
Further, in step (2), the pressure 50-400MPa of cold heat isostatic pressing base, pressure maintaining 2-20min, hot pressing densification
Change soaking time is 30-60min.
Further, in step (3), it is 350-450 DEG C that the blank of hot extrusion molding, which squeezes temperature, keeps the temperature 30-60min, is squeezed
Pressure ratio is 14-40.
Compared with prior art, the beneficial effects of the present invention are:
(1) the present invention is based on single rollers to get rid of band flash set technology, can effectively inhibit alloying component segregation, coarse precipitated phase
It is formed, improves the solid solubility of alloying element, refine crystal grain, and then prepare the high-performance Gao Xinhan that common process is difficult to prepare
Measure Al-Zn-Mg-Cu-Zr alloy；
(2) for the present invention by alloy elements regulation, the high zinc content Al-Zn-Mg-Cu-Zr alloy of preparation is with higher
Intensity and plasticity can widen the application prospect of high zinc content Al-Zn based alloy.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and is used to explain the present invention together with embodiments of the present invention,
It is not construed as limiting the invention, in the accompanying drawings:
Fig. 1 is the micro-organization chart of the quick solidification band prepared in embodiment 1.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Embodiment 1
A kind of quickly solidification high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy, by mass percentage, specifically include as
Lower component: Zn27.4%, Mg 1.55%, Cu 1.20%, Zr0.08%, inevitable impurity content are less than 0.2%, Al
Surplus.
Above-mentioned high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy is prepared, is specifically comprised the following steps:
(1) after crucible melting being added in commercial-purity aluminium (purity >=99.70%), industrial pure copper (purity >=99.95%), according to
Secondary addition industrial-purity zinc (purity >=99.50%), Al-10Zr intermediate alloy and technical pure Mg (purity 99.90%), until all
Fusing, smelting furnace are stirred with magnetic stirrer, 700 DEG C of heat preservation 15-20min；
(2) alloy solution is sprayed to high-speed rotating copper roller, is quickly solidified as fine-grained aluminium alloy band.Nozzle bore
For 3mm, nozzle to copper roll spacing is from for 10mm；Thickness of strip is 70-100 μm, width 3-4mm, microscopic structure such as Fig. 1 institute
Show, as shown in Figure 1, crystallite dimension is tiny, and average grain size is 3.4 μm, and crystal boundary is without coarse precipitated phase.
Band is quickly solidified using the high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy of preparation, through broken, Leng Dengjing
Suppress base, using the method for hot forward extrusion, prepare the solid bar that diameter is 13mm, it is specific the preparation method is as follows:
(1) band crushing will be quickly solidified, using isostatic cool pressing mode, under 200MPa pressure, pressure maintaining 8min prepares ruler
Very little is 50 × 30mm of φ extrusion billet；
(2) it by blank heating to 400 DEG C, after keeping the temperature 30min, is squeezed, extrusion ratio 14.8, extrusion cylinder temperature is
400 DEG C, mold temperature is 380 DEG C, and the type of cooling is air-cooled.
The solid bar of preparation, surface is smooth, no cracking, to the profile of preparation according to GB/T228-2000 standard into
Row Mechanics Performance Testing, test result is as follows: the maximum tensile strength 485MPa, elongation 5.25%, the extruded bars of acquisition
Good mechanical properties.
The tissue that above-mentioned preparation method obtains the quick curdled appearance of high kirsite is α (Al)+η (MgZn2) phase, hot extrusion
Tissue is α (Al)+η (MgZn2)+Zn after pressure.
Embodiment 2
Band is quickly solidified using high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy prepared by embodiment 1, through broken,
Isostatic cool pressing base prepares the solid bar that diameter is 10mm using the method for hot forward extrusion, it is specific the preparation method is as follows:
(1) band crushing will be quickly solidified, using isostatic cool pressing mode, under 200MPa pressure, pressure maintaining 8min prepares ruler
Very little is 50 × 30mm of φ extrusion billet；
(2) it by blank heating to 400 DEG C, after keeping the temperature 30min, is squeezed, extrusion ratio 25, extrusion cylinder temperature is 400
DEG C, mold temperature is 380 DEG C, and the type of cooling is air-cooled.
The solid bar of preparation, surface is smooth, no cracking, carries out power according to GB/T228-2000 to the profile of preparation
Performance test is learned, test result is as follows: the maximum tensile strength 477MPa, elongation 3.1%, the mechanics of the extruded bars of acquisition
It is functional.
Embodiment 3
Band is quickly solidified using high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy prepared by embodiment 1, through broken,
Isostatic cool pressing base after hot-pressing densification, using the method for hot forward extrusion, prepares the solid bar that diameter is 10mm, specific to make
Preparation Method is as follows:
(1) band crushing will be quickly solidified, using isostatic cool pressing mode, under 200MPa pressure, pressure maintaining 8min prepares ruler
Very little is 50 × 30mm of φ extrusion billet；
(2) blank is preheated to 380 DEG C, keeps the temperature 30min, on 200T press machine, hot pressing 1min densifies blank；
(3) it by blank heating to 400 DEG C, after keeping the temperature 30min, is squeezed, extrusion ratio 25, extrusion cylinder temperature is 400
DEG C, mold temperature is 380 DEG C, and the type of cooling is air-cooled.
The solid bar of preparation, surface is smooth, no cracking, carries out power according to GB/T228-2000 to the profile of preparation
Performance test is learned, test result is as follows: the maximum tensile strength 473MPa, and maximum elongation rate is 7.5%, the extruded bars of acquisition
Good mechanical properties.
Embodiment 4
Band is quickly solidified using high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy prepared by embodiment 1, through broken,
Isostatic cool pressing base after hot-pressing densification, using the method for hot forward extrusion, prepares the solid bar that diameter is 10mm, specific to make
Preparation Method is as follows:
(1) band crushing will be quickly solidified, using isostatic cool pressing mode, under 200MPa pressure, pressure maintaining 8min prepares ruler
Very little is 50 × 30mm of φ extrusion billet；
(2) blank is preheated to 200 DEG C, keeps the temperature 40min, on 200T press machine, hot pressing 1min densifies blank；
(3) it by blank heating to 400 DEG C, after keeping the temperature 30min, is squeezed, extrusion ratio 25, extrusion cylinder temperature is 400
DEG C, mold temperature is 380 DEG C, and the type of cooling is air-cooled.
The solid bar of preparation, surface is smooth, no cracking, carries out power according to GB/T228-2000 to the profile of preparation
Performance test is learned, test result is as follows: the maximum tensile strength 484MPa, and maximum elongation rate is 8.5%, the extruded bars of acquisition
Good mechanical properties.
Embodiment 5
The high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy with flash set technology preparation is got rid of based on single roller, by quality
Percentage specifically includes following component:
Zn 24%, Mg 2.58%, Cu 1.5%, Zr0.08%, inevitable impurity content are less than 0.2%, Al
Surplus.
Above-mentioned high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy is prepared, is specifically comprised the following steps:
(1) after crucible melting being added in commercial-purity aluminium (purity >=99.70%), industrial pure copper (purity >=99.95%), according to
Secondary addition industrial-purity zinc (purity >=99.50%), Al-10Zr intermediate alloy and technical pure Mg (purity 99.90%), until all
Fusing, melt are stirred with magnetic stirrer, 700 DEG C of heat preservation 15-20min；
(2) alloy solution is sprayed to high-speed rotating copper roller, is rapidly solidificated into band.Nozzle bore 3mm, nozzle is extremely
Copper roll spacing is from for 10mm；Thickness of strip is 70-100 μm, width 3-4mm.
Band is quickly solidified using the high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy of preparation, through broken, Leng Dengjing
Base is suppressed, after hot-pressing densification, using the method for hot forward extrusion, prepares the solid bar that diameter is 10mm, specific preparation method
It is as follows:
(1) band crushing will be quickly solidified, using isostatic cool pressing mode, under 200MPa pressure, pressure maintaining 8min prepares ruler
Very little is 50 × 30mm of φ extrusion billet；
(2) blank is preheated to 250 DEG C, keeps the temperature 40min, on 200T press machine, hot pressing 1min densifies blank；
(3) it by blank heating to 400 DEG C, after keeping the temperature 30min, is squeezed, extrusion ratio 25, extrusion cylinder temperature is 400
DEG C, mold temperature is 380 DEG C, and the type of cooling is air-cooled.
The solid bar of preparation, surface is smooth, no cracking, carries out power according to GB/T228-2000 to the profile of preparation
Performance test is learned, test result is as follows: the maximum tensile strength 508MPa, and maximum elongation rate is 10.5%, the extruded bars of acquisition
Good mechanical properties.
The alloy mechanical property test table for the solid bar being prepared is shown in Table 1.
The alloy mechanical property test table that 1 present invention of table obtains
Finally, it should be noted that these are only the preferred embodiment of the present invention, it is not intended to restrict the invention, although
Referring to embodiment, invention is explained in detail, for those skilled in the art, still can be to aforementioned
Technical solution documented by each embodiment is modified or equivalent replacement of some of the technical features, but it is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (7)
1. a kind of quickly solidification high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy, which is characterized in that by mass percentage, packet
Include following component: Zn 18-28%, Mg 1.0-3.0%, Cu 1.0-2.0%, Zr0.05-0.2%, inevitable impurity contain
Amount is surplus less than 0.2%, Al.
2. a kind of preparation side of quickly solidification high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy according to claim 1
Method, which is characterized in that comprise the following steps:
(1) by mass percentage, after crucible melting being added in commercial-purity aluminium, fine copper, industrial-purity zinc, Al-10Zr are sequentially added
Intermediate alloy and technical pure Mg, until all fusing, melt are stirred with blender, 700-720 DEG C of heat preservation 15-
After 20min, alloy solution is sprayed to high-speed rotating roller, band is rapidly solidificated into；
(2) band crushing will be quickly solidified, using cold heat isostatic pressing base, hot-pressing densification；
(3) alloy blank is heated to 350-450 DEG C, keeps the temperature 30-60min, hot extrusion molding.
3. a kind of preparation side of quickly solidification high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy according to claim 2
Method, which is characterized in that purity >=99.7% of the commercial-purity aluminium, purity >=99.5% of the industrial-purity zinc, the industry
Purity >=99.95% of fine copper, purity >=99.90% of the pure magnesium, the source of the Zr are to close among Al-10Zr
Gold.
4. a kind of preparation side of quickly solidification high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy according to claim 2
Method, which is characterized in that in step (1), alloy solution is ejected on high-speed rotating roller by nozzle, is quickly solidified as fine grain
Band, thickness of strip are 70-120 μm, width 3-4mm, and average grain size is 2-5 μm.
5. a kind of preparation side of quickly solidification high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy according to claim 4
Method, which is characterized in that the nozzle diameter is 1-3.5mm, and nozzle to copper roll spacing is from for 2-16mm.
6. a kind of preparation side of quickly solidification high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy according to claim 2
Method, which is characterized in that in step (2), the pressure 50-400MPa of cold heat isostatic pressing base, pressure maintaining 2-20min, hot-pressing densification
Preheating time is 30-60min.
7. a kind of preparation side of quickly solidification high-performance high zinc content Al-Zn-Mg-Cu-Zr alloy according to claim 2
Method, which is characterized in that in step (3), it is 350-450 DEG C that the blank of hot extrusion molding, which squeezes temperature, keeps the temperature 30-60min, is squeezed
Than for 14-40.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113230457A (en) * | 2021-05-14 | 2021-08-10 | 太原理工大学 | Degradable porous zinc-based composite material for bone repair and preparation method thereof |
| CN116516223A (en) * | 2023-04-03 | 2023-08-01 | 北京工业大学 | Erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy and preparation method thereof |
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