CN106435300B - A kind of anti-corrosion rare earth aluminium alloy strengthened - Google Patents
A kind of anti-corrosion rare earth aluminium alloy strengthened Download PDFInfo
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- CN106435300B CN106435300B CN201610993550.7A CN201610993550A CN106435300B CN 106435300 B CN106435300 B CN 106435300B CN 201610993550 A CN201610993550 A CN 201610993550A CN 106435300 B CN106435300 B CN 106435300B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
Abstract
The present invention relates to rare-earth alloy material field, more particularly to a kind of anti-corrosion rare earth aluminium alloy strengthened.Rare earth aluminium alloy designed by the present invention, using the characteristics of metallic element conventional in alloy and effect, by the synergistic effect of appropriate ratio and dosage rare earth Sc and Er, it is good, excellent in mechanical performance to obtain corrosion resistance, it is anti-corrosion can reinforced aluminium alloy.The tensile strength of Al Mg Si line aluminium alloys designed by the present invention can reach 224.6MPa, and elongation after fracture is 19.3%, and corrosion-resistant rate is 2.34 × 10‑5g/mm2.Composition design of the present invention is reasonable, cost-effective, and preparation process is simple, is convenient for large-scale industrialization application.
Description
Technical field
The present invention relates to rare-earth alloy material field, more particularly to a kind of anti-corrosion rare earth aluminium alloy strengthened.
Technical background
China's bauxite resource is abundant, and the intensity of aluminium and aluminium alloy is high and density is small, has good thermal conductivity, and easy shape
Good corrosion resistance is obtained at fine and close aluminum oxide film, aluminium and aluminium alloy are industrially widely used.Al-Mg-Si systems
Aluminium alloy not only has good craftsmanship, excellent corrosion resistance and moderate obdurability, but also very oxidizable coloring, can be extensive
For industry profile and architectural shape.
Existing Al-Mg-Si-type aluminum alloy has many excellent characteristics, but still is difficult to meet people to the line aluminium alloy
Certain particular surroundings and under the conditions of harsher new demand, such as good deformability is to carry out deep-draw processing, more
High intensity and corrosion resistance more outstanding ensure the security application etc. of material.In the prior art, have much mono- about Sc, Er
The record of only reinforced aluminium alloy, but up to the present yet there are no by adjusting component and coordinate appropriate Sc, Er ratio and strengthen
The report of aluminium alloy.
Invention content
The present invention is in heuristic process, it is not intended to be found that when Sc, Er atomic ratio are 0.2~1:When 1, resulting materials performance
It is especially prominent.Based on this, it is proposed that a kind of impurity content is few, even tissue is tiny, at low cost and highly practical rare earth aluminium closes
Gold, this alloy have the characteristics that anti-corrosion strengthen.
A kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention；This anti-corrosion rare earth aluminium alloy strengthened contains in alloy
There are conventional metallic element Mg, Si, Fe, Mn, Cu, Cr and Ti and Er and two kinds of rare earth elements of Sc, surplus to be Al and can not
The impurity element avoided；Alloy can change the performance of material by being heat-treated softening or Strengthening and Toughening.
A kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention；Include following components with atomic percentage：
Mg 0.55~0.80；Si 0.30~0.45；Fe 0.05~0.15；
Mn 0~0.05；Cu 0~0.05；
Cr 0~0.05；Ti 0~0.05；
Er 0.01~0.3；Sc 0.01~0.3, remaining is Al；And Er：Sc=0.1~5:1.
A kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention；Can be preferably following components with atomic percentage：Mg
0.55~0.75；Si 0.30~0.42；Fe 0.05~0.12；
Mn 0.02~0.05；Cu 0.02~0.05；
Cr 0.02~0.04；Ti 0.02~0.04；
Er 0.02~0.1；Sc 0.02~0.1, remaining is Al；And Er：Sc=0.2~1:1.
A kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention；It can be preferably further following groups with atomic percentage
Point：
Mg 0.6~0.75；
Si 0.30~0.42；
Fe 0.1~0.12；
Mn 0.03~0.05；
Cu 0.03~0.05；
Cr 0.03~0.04；
Ti 0.03~0.04；
Er 0.02~0.06；
Sc 0.04~0.1, remaining is Al；And Er：Sc=0.25~0.6:1.
A kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention；C content is not higher than 0.1wt%, and O content is not higher than
0.1wt%, N content are not higher than 0.1wt% not higher than the total content of 0.1wt% and remaining impurity element.
Preferably, a kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention：C content is not higher than 0.04wt%, and O content is not
Higher than 0.04wt%, N content is not higher than 0.04wt% not higher than 0.04wt% and remaining impurity content.
A kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention；The softened processing of rare earth aluminium alloy, obtains at softening
Manage sample；The temperature of the sofening treatment is 540~560 degrees Celsius, air-cooled after sofening treatment or water cooling.
A kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention；0.5 can be kept the temperature before sofening treatment at 400~480 degrees Celsius
Sofening treatment is carried out after~6 hours again.
A kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention；Artificial aging processing is carried out after sofening treatment again.Timeliness temperature
Degree is 150~250 degrees Celsius, and aging time is 1~24 hour.
A kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention；The yield strength of sample obtained by artificial aging is more than or equal to
145MPa, tensile strength are more than or equal to 175MPa, elongation after fracture is more than or equal to 18.9%.
A kind of anti-corrosion rare earth aluminium alloy strengthened of the present invention；When the rare earth aluminium alloy；With atomic percentage under
Group is stated to be grouped as：Mg 0.67%, Si 0.39%, Fe 0.12%, Mn 0.05%, Cu 0.05%, Cr 0.04%, Ti
0.04%, Er0.05%, Sc 0.1% when remaining is Al, is handled 6 hours before control softening at 480 DEG C, then at 540 DEG C
Reason 6 hours, it is air-cooled, then in 150 DEG C of artificial agings 24 hours；Obtain that yield strength is 183.5MPa, tensile strength is
224.6MPa, elongation after fracture 19.3%.Corrosion-resistant rate is 2.34 × 10-5g/mm2Finished product.
Al-Mg-Si system alloy as heat treatment can reinforced alloys, different-alloy element has not in Al-Mg-Si system alloy
Same effect.Mg and Si primarily form Mg2Si phases, a certain amount of Mg and Si play heat-treatable strengthened effect outstanding.Mn
Solid solution strengthening effect is good, and also has promotion towards property and bending property to the only property of the corrosion resistant of alloy, impact.Cu can significantly improve conjunction
Plasticity of the gold in hot-working, and can also have booster action to heat treatment reinforcement effect, alloy is reduced because residing for addition Mn
Anisotropy.Cr is similar with the effect of Mn, and hardening constituent when to artificial aging be precipitated it is advantageous.Ti makes the columanar structure of ingot casting
It is apparent to reduce, improve the forgeability of alloy, the crystal grain of refining alloy.When containing Fe in alloy, product surface anode can be made
Color and luster after oxidation processes changes.The present invention be fully conducive to the conventional metallic element Mg, Si of these in alloy, Fe, Mn,
The characteristics of Cu, Cr and Ti and effect rationally design the ingredient of these constituent elements.
Synergistic effect of the present invention through each component is especially 0.2~1 in Sc, Er atomic ratio:1 (especially 0.25~
0.6:1) in the collaboration of appropriate other components use under, achieve intention less than effect, be in particular in, designed alloy
Tensile strength can reach 224.6MPa, and elongation after fracture is 19.3%, and corrosion-resistant rate is 2.34 × 10-5g/mm2(80 hours
The weight decrement of the front and back sample of per surface area corrosion after salt air corrosion), and the tensile strength of its soft state is
167.4MPa, and elongation after fracture is 23.5%, shows the good anti-corrosion effect strengthened.
Specific implementation mode
The content of alloying element is as shown in table 1 in 1-6# alloys, and raw material used are 99.8% or more simple metal
Or intermediate alloy, ingot casting is obtained using the method for melting.Ingot casting is through impurities analysis, and the results are shown in Table 2.Ingot casting is softened
When processing, sofening treatment technique is shown in Table 3, and the type of cooling is air-cooled processing, and sample soft state is denoted as O states.Ingot casting is through tough
When changing processing, artificial aging processing is carried out again after sofening treatment process shown in table 3, artificial aging treatment process is shown in Table
4, sample state is denoted as T6 states.The performance test results of alloy different heat treatment state are as shown in table 5.Wherein, the sample of T62 states
Salt spray test is carried out in YL-40C salt spray test chambers, the NaCl solution that brine is 4%, environment temperature is 30 DEG C, using periodicity
Spray 80h, and the fog horn degree that holds of sample is 45 °, and corrosion resistance ω is the weight decrement of the front and back sample of unit surface area corrosion.
The content (atomic percent) of the alloying element of 1 1-6# alloys of table
| Alloy | Mg | Si | Fe | Mn | Cu | Cr | Ti | Er | Sc |
| 1# | 0.80 | 0.45 | 0.15 | 0 | 0 | 0 | 0 | 0.01 | 0.01 |
| 2# | 0.67 | 0.39 | 0.12 | 0.05 | 0.05 | 0.04 | 0.04 | 0.05 | 0.1 |
| 3# | 0.67 | 0.39 | 0.12 | 0.03 | 0.03 | 0.03 | 0.03 | 0 | 0.15 |
| 4# | 0.67 | 0.39 | 0.12 | 0.03 | 0.03 | 0.03 | 0.03 | 0.15 | 0 |
| 5# | 0.67 | 0.39 | 0.12 | 0.03 | 0.03 | 0.03 | 0.03 | 0 | 0 |
| 6# | 0 | 0.30 | 0 | 0.05 | 0.05 | 0.05 | 0.05 | 0.4 | 0.003 |
The impurity content analysis result (mass percent) of 2 1-6# alloys of table
| Alloy | O | C | N | Other impurity |
| 1# | 0.035 | 0.038 | 0.012 | 0.021 |
| 2# | 0.012 | 0.020 | 0.008 | 0.015 |
| 3# | 0.032 | 0.034 | 0.011 | 0.018 |
| 4# | 0.009 | 0.012 | 0.006 | 0.012 |
| 5# | 0.076 | 0.112 | 0.045 | 0.056 |
| 6# | 0.008 | 0.010 | 0.006 | 0.010 |
3 sofening treatment technique of table
4 artificial aging treatment process of table
The performance test results of 5 alloy different heat treatment state of table
It can be seen that by 2#T62 samples and the comparison of 3#T62 samples, 4#T62 samples, 5#T62 samples, 6#T62 samples
The present invention plays unexpected effect.
Claims (1)
1. a kind of anti-corrosion rare earth aluminium alloy strengthened；It is characterized in that including following components with atomic percentage：
Mg 0.67%、Si 0.39%、Fe 0.12%、Mn 0.05%、Cu 0.05%、Cr 0.04%、Ti 0.04%、
Er0. 05%, Sc 0.1%, remaining is Al；
The rare earth aluminium alloy is first handled 6 hours at 480 DEG C, is then handled 6 hours at 540 DEG C, air-cooled, then in 150 DEG C of people
Working hour imitates 24 hours；Obtain yield strength be 183.5 MPa, tensile strength 224.6MPa, elongation after fracture 19.3%；It is resistance to
Rate of corrosion is 2.34 × 10-5 g/mm2Finished product.
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| CN114000017A (en) * | 2020-07-27 | 2022-02-01 | 湖南稀土金属材料研究院 | High-strength high-conductivity aluminum alloy conductor material and preparation method thereof |
| CN112962069B (en) * | 2021-02-02 | 2023-04-28 | 长沙淮石新材料科技有限公司 | Intermetallic compound-containing aluminum alloy target and preparation method thereof |
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| CN101921938A (en) * | 2010-08-19 | 2010-12-22 | 浙江巨科铝业有限公司 | Aluminum alloy 5052 having high corrosion resistance and manufacturing method thereof |
| CN103993209A (en) * | 2014-05-29 | 2014-08-20 | 合肥工业大学 | Rare earth Sc micro-alloyed Al-Mg-Si-Cu alloy and preparation method thereof |
| CN104711468A (en) * | 2013-12-16 | 2015-06-17 | 北京有色金属研究总院 | High strength and high heat resistant aluminum alloy material and preparation method thereof |
| CN105088031A (en) * | 2014-05-07 | 2015-11-25 | 天长市正牧铝业科技有限公司 | Aluminum alloy material |
| CN105331858A (en) * | 2015-11-20 | 2016-02-17 | 江苏大学 | Preparation method for high-strength and high-toughness ultra-fine grain aluminium alloy |
| CN105543588A (en) * | 2015-12-18 | 2016-05-04 | 百色学院 | Special aluminum alloy ingot for casting hubs and preparation method of aluminum alloy ingot |
| CN105970036A (en) * | 2016-06-15 | 2016-09-28 | 宁波宏协承汽车部件有限公司 | Rare earth micro-alloying aluminum alloy for automobile skylight guide rail and preparing method of alloy |
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- 2016-11-10 CN CN201610993550.7A patent/CN106435300B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101921938A (en) * | 2010-08-19 | 2010-12-22 | 浙江巨科铝业有限公司 | Aluminum alloy 5052 having high corrosion resistance and manufacturing method thereof |
| CN104711468A (en) * | 2013-12-16 | 2015-06-17 | 北京有色金属研究总院 | High strength and high heat resistant aluminum alloy material and preparation method thereof |
| CN105088031A (en) * | 2014-05-07 | 2015-11-25 | 天长市正牧铝业科技有限公司 | Aluminum alloy material |
| CN103993209A (en) * | 2014-05-29 | 2014-08-20 | 合肥工业大学 | Rare earth Sc micro-alloyed Al-Mg-Si-Cu alloy and preparation method thereof |
| CN105331858A (en) * | 2015-11-20 | 2016-02-17 | 江苏大学 | Preparation method for high-strength and high-toughness ultra-fine grain aluminium alloy |
| CN105543588A (en) * | 2015-12-18 | 2016-05-04 | 百色学院 | Special aluminum alloy ingot for casting hubs and preparation method of aluminum alloy ingot |
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