CN106367702A - Method for improving performance of ultrahigh-strength aluminum alloy through solid solution-thermal deformation pretreatment - Google Patents
Method for improving performance of ultrahigh-strength aluminum alloy through solid solution-thermal deformation pretreatment Download PDFInfo
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- CN106367702A CN106367702A CN201610818551.8A CN201610818551A CN106367702A CN 106367702 A CN106367702 A CN 106367702A CN 201610818551 A CN201610818551 A CN 201610818551A CN 106367702 A CN106367702 A CN 106367702A
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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
- C22F1/053—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 zinc 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
- 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
Abstract
The invention provides a method for improving the performance of an ultrahigh-strength aluminum alloy through solid solution-thermal deformation pretreatment. The method is characterized by mainly comprising the following procedures: pretreatment and subsequent strengthening thermal treatment; an extruded 7000-series (Al-Zn-Mg-Cu) alloy subjected to homogenization treatment is adopted as the ultrahigh-strength aluminum alloy; in the pretreatment procedure, primary solid solution treatment is performed at 450+/-5 DEG C for 2 h, secondary solid solution treatment is performed at 460+/-5 DEG C for 2 h, tertiary solid solution treatment is performed at 470+/-5 DEG C for 2 h, and thermal deformation treatment with a reduction ratio of 45% is performed; and in the subsequent strengthening thermal treatment procedure, solid solution-aging treatment is performed. When the ultrahigh-strength aluminum alloy is treated by utilizing the pretreatment method and then subjected to the subsequent solid solution-aging treatment, the intergranular corrosion-resistant property of the ultrahigh-strength aluminum alloy can be obviously improved.
Description
Technical field
The present invention relates to a kind of material modification technology, especially a kind of aluminium alloy combination property raising method, specifically
Be a kind of comprehensive utilization solid solution, thermal deformation, pre- reply, ageing technique is to improve 7000 be (al-zn-mg-cu) alloy property
Method.
Background technology
7000 is (al-zn-mg-cu) alloy because having that density is little, intensity is high, toughness is high, low cost, anticorrosive and easy return
The advantages of receipts, it is widely used in the fields such as Aero-Space, weaponry, ship and chemical industry.In recent years, lightweight structure material
Become the study hotspot in the fields such as transportation and Aero-Space, and the fast development with modern industry, to high strength alumin ium alloy
Intensity, toughness and decay resistance etc. require also to step up, its level of development not only embodies a national Integrated Dept.
Skill strength, and be the important leverage of a national national defense safety.
In order to ensure that 7000 is the superhigh intensity of (al-zn-mg-cu) alloy, the design of its composition is extremely important.Enter 21 generation
Record, the high speed development of aircraft industry is put forward higher requirement to the performance of aluminium alloy, constantly promote more high combination property aluminium alloy
Design research and development.In recent years, China achieves a lot of achievements in terms of high-performance al-zn-mg-cu design of alloy.Patent
Patent number for cn104711465a it is proposed that a kind of al-zn-mg-cu high-strength aluminum alloy material and preparation method thereof, using this
Method is prepared into intensity of aluminum alloy and can reach 700mpa.The patent of Patent No. cn104561702a is it is proposed that a kind of micro add
Plus erbium (er), the al-zn-mg-cu alloy of zirconium (zr) and preparation technology, using erbium (er), zirconium in the alloy of this technique preparation
(zr) mass percent is 0.08 ~ 0.12%, and this alloy strength and corrosion resistance are preferable.Patent No. cn104152761a
Patent it is proposed that a kind of al-zn-mg-cu-zr alloy containing scandium and preparation method, the alloy grain that manufactured using the method
Less, intensity is higher.
However, up to the present, how to improve 7000 by intensive treatment is (al-zn-mg-cu) alloy combination property
Research still imperfection.
Content of the invention
The purpose of the present invention be directed to existing 7000 line aluminium alloy performances improve unhappy it is difficult to meet asking of use requirement
Topic, a kind of method of the raising ultra-high-strength aluminum alloy performance based on pre-treatment and subsequent reinforced heat treatment of invention.
The technical scheme is that
The method that a kind of solid solution-thermal deformation pre-treatment improves ultra-high-strength aluminum alloy performance, is characterized in that it specifically includes that pre-treatment
With subsequent reinforced heat treatment, described pre-treatment includes:
(1) ultra-high-strength aluminum alloy of As-extruded is carried out technique be 450 ± 5 DEG C × 2h, 460 ± 5 DEG C × 2h and 470 ± 5 DEG C ×
Three solution treatment of 2h, then carry out water quenching, and water-quenched slag is 25 DEG C；
(2) ultra-high-strength aluminum alloy through solution treatment is heated to 380 ~ 420 DEG C, carrying out reduction ratio after insulation 2h is 40-50%
Thermal deformation；
Described subsequent reinforced heat treatment includes follow-up solution treatment-follow-up ageing strengthening and processes；
Follow-up solution treatment refer to the ultra-high-strength aluminum alloy through pretreatment is carried out 450 ± 5 DEG C × 2h, 460 ± 5 DEG C × 2h and
Three Intensive intervention of 470 ± 5 DEG C × 2h；Described follow-up Ageing Treatment refers to close the strong aluminum of superelevation through follow-up solution treatment
Gold carries out water quenching at normal temperatures immediately, and water-quenched slag is 25 DEG C, then carries out 100 DEG C × 6h～48 h(time interval 6h) or
120 DEG C × 6 h～48 h(time intervals 6h) Ageing Treatment.
Described ultra-high-strength aluminum alloy is to be (al-zn-mg-cu) alloy through the As-extruded 7000 of homogenize process, it
Mainly it is made up of aluminum (al), zinc (zn), magnesium (mg), copper (cu), zirconium (zr), strontium (sr), the mass percent of wherein aluminum (al) is
84.64 ~ 85.81%, the mass percent 9.18 ~ 9.97% of zinc (zn), the mass percent of magnesium (mg) is 2.76 ~ 2.82%, copper
(cu) mass percent 2.25 ~ 2.57%.
Beneficial effects of the present invention:
(1) use the alloy that pre-treating method of the present invention is processed, then process through follow-up solid gas coupling, obtain in other performances
To on the basis of keep or improve, its anti intercrystalline corrosion performance is significantly improved.
(2) alloy property of the present invention improves method, and simple to operate, equipment requirements are low, possess good application prospect.
Brief description
Fig. 1 is the intercrystalline corrosion analysis picture of embodiment one alloy without pre-treatment of the present invention.
Fig. 2 is the intercrystalline corrosion analysis picture of embodiment one alloy through pre-treatment of the present invention.
Fig. 3 is the intercrystalline corrosion analysis picture of embodiment two alloy without pre-treatment of the present invention.
Fig. 4 is the intercrystalline corrosion analysis picture of embodiment two alloy through pre-treatment of the present invention.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment one.
Actual measurement mass fraction is the As-extruded superelevation of al-13.01zn-3.16mg-2.4cu-0.204zr-0.0757sr
Strength aluminum alloy, after cutting sampling, three times that alloy is carried out with 450 ± 5 DEG C of 2 h+460 ± 5 DEG C, 2 h+470 ± 5 DEG C 2 h solid
Molten process, solid solution terminate after water quenching immediately, water temperature be 25 DEG C, alloy is put in 400 DEG C of resistance furnaces be incubated 2 h afterwards, then
Alloy after heating is pushed along long side it is ensured that the reduction ratio of sample is 45%.Subsequently, 450 ± 5 are carried out to the alloy after compression
Three subsequent reinforced solution treatment of DEG C 2 h+460 ± 5 DEG C, 2 h+470 ± 5 DEG C 2 h, subsequent reinforced solid solution terminate after immediately
Water quenching, water temperature is 25 DEG C.After Water Quenching, alloy is carried out with the Ageing Treatment of 100 DEG C × 36h.Finally to its hardness, conductive
Rate, intensity, through row measurement, carries out xrd to it, and ebsd analyzes, and carries out intercrystalline corrosion, and Peeling Corrosion is tested, during obtaining its peak value
The performance indications of each side during effect, and contrast with the sample only carrying out Intensive intervention and Ageing Treatment.
Experimental result is following (table 1):
Test result indicate that, solid solution-thermal deformation pre-treatment is to al-13.01zn-3.16mg-2.4cu-0.204zr-0.0757sr
The hardness of alloy and conductivity have little to no effect, and the conjunction not carrying out pre- reply compared by the alloy after solid solution-thermal deformation pre-treatment
Its intensity golden is declined slightly, and its anti intercrystalline corrosion ability is obviously improved, and its anti-strip corrosive nature also slightly improves, its
Crystallite dimension is refined, and its low-angle boundary ratio slightly improves.
Embodiment two.
The As-extruded superelevation that actual measurement mass fraction is al-10.78zn-2.78mg-2.59cu-0.22zr-0.047sr is strong
Aluminium alloy, after cutting sampling, carries out three solid solutions of 450 ± 5 DEG C of 2 h+460 ± 5 DEG C, 2 h+470 ± 5 DEG C 2 h to alloy
Process, solid solution terminate after water quenching immediately, water temperature be 25 DEG C, alloy is put in 400 DEG C of resistance furnaces be incubated 2 h afterwards, then will
Alloy after heating pushes along long side it is ensured that the reduction ratio of sample is 45%.Subsequently, 450 ± 5 DEG C 2 is carried out to the alloy after compression
Three solution treatment of h+460 ± 5 DEG C 2 h+470 ± 5 DEG C 2 h, solid solution terminate after water quenching immediately, water temperature be 25 DEG C.Water quenching
After process, alloy is carried out with the Ageing Treatment of 100 DEG C × 48h.Finally to its hardness, conductivity, intensity, through row measurement, is entered to it
Row xrd, ebsd analyze, and carry out intercrystalline corrosion, and Peeling Corrosion is tested, to obtain the performance indications of each side during its peak value timeliness,
And contrast with the sample only carrying out Intensive intervention and Ageing Treatment.
Experimental result is following (table 2):
Test result indicate that, solid solution-thermal deformation pre-treatment is closed to al-10.78zn-2.78mg-2.59cu-0.22zr-0.047sr
The hardness of gold and conductivity have little to no effect, and the alloy not carrying out pre- reply compared by the alloy after solid solution-thermal deformation pre-treatment
Its intensity slightly improves, and its anti intercrystalline corrosion ability is obviously improved, and its anti-strip corrosive nature is also declined slightly, and it is brilliant
Particle size is refined, and its low-angle boundary ratio improves about 5%.
Embodiment three.
The difference of the present embodiment and embodiment one is heated to 380 DEG C of insulations in pretreatment process and carries out reduction ratio in 2 hours
Thermal deformation for 40%.In subsequent reinforced processing procedure last Ageing Treatment adopt 100 DEG C × 6h or 100 DEG C × 12h or
The Ageing Treatment of 100 DEG C × 48h.Measured performance parameter is close with table 1.
Example IV.
The difference of the present embodiment and embodiment one is heated to 420 DEG C of insulations in pretreatment process and carries out reduction ratio in 2 hours
Thermal deformation for 50%.In subsequent reinforced processing procedure last Ageing Treatment adopt 120 DEG C × 6h or 120 DEG C × 12h, 120
DEG C × the 24h, Ageing Treatment of 120 DEG C × 36h or 120 DEG C × 48h.Measured performance parameter is close with table 1.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Claims (2)
1. the method that a kind of solid solution-thermal deformation pre-treatment improves ultra-high-strength aluminum alloy performance, is characterized in that it specifically includes that front place
Reason and subsequent reinforced heat treatment, described pre-treatment includes:
(1) ultra-high-strength aluminum alloy of As-extruded is carried out technique be 450 ± 5 DEG C × 2h, 460 ± 5 DEG C × 2h and 470 ± 5 DEG C ×
Three solution treatment of 2h, then carry out water quenching, and water-quenched slag is 25 DEG C；
(2) ultra-high-strength aluminum alloy through solution treatment is heated to 380 ~ 420 DEG C, carrying out reduction ratio after insulation 2h is 40-50%
Thermal deformation；
Described subsequent reinforced heat treatment includes follow-up solution treatment-follow-up ageing strengthening and processes；
Follow-up solution treatment refer to the ultra-high-strength aluminum alloy through pretreatment is carried out 450 ± 5 DEG C × 2h, 460 ± 5 DEG C × 2h and
Three Intensive intervention of 470 ± 5 DEG C × 2h；Described follow-up Ageing Treatment refers to close the strong aluminum of superelevation through follow-up solution treatment
Gold carries out water quenching at normal temperatures immediately, and water-quenched slag is 25 DEG C, then carries out 100 DEG C × 6h～48 h(time interval 6h) or
120 DEG C × 6 h～48 h(time intervals 6h) Ageing Treatment.
2. the method described in claim 1, is characterized in that described ultra-high-strength aluminum alloy is the As-extruded through homogenize process
7000 is (al-zn-mg-cu) alloy, and it is mainly by aluminum (al), zinc (zn), magnesium (mg), copper (cu), zirconium (zr), strontium (sr) group
Become, wherein the mass percent of aluminum (al) is 84.64 ~ 85.81%, the mass percent 9.18 ~ 9.97% of zinc (zn), magnesium (mg)
Mass percent is 2.76 ~ 2.82%, the mass percent 2.25 ~ 2.57% of copper (cu).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107299303A (en) * | 2017-08-18 | 2017-10-27 | 江苏大学 | One kind greatly improves ultra-high-strength aluminum alloy laterally longitudinal plasticity and isotropic method |
| CN107326310A (en) * | 2017-07-31 | 2017-11-07 | 江苏大学 | A kind of strenthen-toughening mechanizm method of the high tough Al Si Cu systems cast aluminium alloy gold of Zr and Sr combined microalloyings |
| CN112877622A (en) * | 2021-04-21 | 2021-06-01 | 中国航发北京航空材料研究院 | Non-isothermal heat treatment method of 7000 series aluminum alloy |
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| CN101509091A (en) * | 2009-03-27 | 2009-08-19 | 中南大学 | High-strength high-ductility Al-Zn-Mg-Cu-Sr alloy and production method |
| CN101928865A (en) * | 2010-04-27 | 2010-12-29 | 中国兵器工业第五九研究所 | Ultrahigh-strength aluminum alloy for bullets |
| CN104404321A (en) * | 2014-11-26 | 2015-03-11 | 中国石油天然气集团公司 | Super-strength aluminum alloy drill rod pipe body for super-deep well and manufacturing method for super-strength aluminum alloy drill rod pipe body |
| CN105734466A (en) * | 2014-12-09 | 2016-07-06 | 北京有色金属研究总院 | Solid solution heat treatment method for improving structure and performance of 7xxx wrought aluminum alloy |
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2016
- 2016-09-12 CN CN201610818551.8A patent/CN106367702A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509091A (en) * | 2009-03-27 | 2009-08-19 | 中南大学 | High-strength high-ductility Al-Zn-Mg-Cu-Sr alloy and production method |
| CN101928865A (en) * | 2010-04-27 | 2010-12-29 | 中国兵器工业第五九研究所 | Ultrahigh-strength aluminum alloy for bullets |
| CN104404321A (en) * | 2014-11-26 | 2015-03-11 | 中国石油天然气集团公司 | Super-strength aluminum alloy drill rod pipe body for super-deep well and manufacturing method for super-strength aluminum alloy drill rod pipe body |
| CN105734466A (en) * | 2014-12-09 | 2016-07-06 | 北京有色金属研究总院 | Solid solution heat treatment method for improving structure and performance of 7xxx wrought aluminum alloy |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326310A (en) * | 2017-07-31 | 2017-11-07 | 江苏大学 | A kind of strenthen-toughening mechanizm method of the high tough Al Si Cu systems cast aluminium alloy gold of Zr and Sr combined microalloyings |
| CN107299303A (en) * | 2017-08-18 | 2017-10-27 | 江苏大学 | One kind greatly improves ultra-high-strength aluminum alloy laterally longitudinal plasticity and isotropic method |
| CN112877622A (en) * | 2021-04-21 | 2021-06-01 | 中国航发北京航空材料研究院 | Non-isothermal heat treatment method of 7000 series aluminum alloy |
| CN112877622B (en) * | 2021-04-21 | 2021-07-23 | 中国航发北京航空材料研究院 | Non-isothermal heat treatment method of 7000 series aluminum alloy |
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Application publication date: 20170201 |