CN105925857A - Corrosion-resistant aluminum alloy - Google Patents
Corrosion-resistant aluminum alloy Download PDFInfo
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- CN105925857A CN105925857A CN201610332667.0A CN201610332667A CN105925857A CN 105925857 A CN105925857 A CN 105925857A CN 201610332667 A CN201610332667 A CN 201610332667A CN 105925857 A CN105925857 A CN 105925857A
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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
- C22C21/02—Alloys based on aluminium with silicon 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
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0036—Matrix based on Al, Mg, Be or alloys thereof
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Abstract
The invention discloses a corrosion-resistant aluminum alloy which is prepared from the following components in percentage by weight: 0.28% of yttrium oxide and praseodymium oxide, 1.43% of silicon, 1.2% of copper, 0.41% of iron, 0.86% of cobalt and beryllium, 0.45% of magnesium, 0.32% of titanium, strontium and sulfur, 0.12% of zin, 0.02% of chromium and the balance of aluminum. According to the invention, titanium, strontium and sulfur elements with a fixed ratio are added into the aluminum alloy, so that the strength and toughness of the aluminum alloy are effectively improved; in addition, after cobalt and beryllium elements with a fixed ratio are added into the aluminum alloy, well grain refinement of a casting is achieved, so that casting cracks are effectively overcome, and the casting appearance and surface quality are improved; and yttrium oxide and praseodymium oxide with a fixed ratio are added, the corrosion resistance of the aluminum alloy is improved through a synergistic effect of the two. The impact toughness of the aluminum alloy is effectively improved by 25.4%.
Description
Technical field
The present invention relates to chemical field, particularly relate to a kind of anticorrosion aluminium.
Background technology
Aluminium alloy is the extension product of fine aluminium, the density of fine aluminium is little (ρ=2.7g/m3), about the 1/3 of ferrum, and fusing point
Low, about about 660 DEG C, aluminum is face-centred cubic structure, therefore has the highest plasticity (δ: 32～40%, ψ: 70～90%), because of
This its be prone to processing, can be made into various section bar, sheet material, and corrosion resistance good.But the intensity of fine aluminium is the lowest, therefore should not make
Structural material.By long-term production practices and scientific experiments, people are gradually to add alloying element and to use the sides such as heat treatment
Method carrys out reinforced aluminum, and this has just obtained a series of aluminium alloy.The alloy adding the formation of certain element in fine aluminium is keeping fine aluminium
Can also have higher intensity while the advantages such as light weight, so make its " specific strength " (intensity and the ratio σ b/ ρ of proportion) victory
Cross a lot of steel alloy, become preferable structural material, be widely used in machine-building, Transport Machinery, dynamic power machine and aircraft industry
Etc. aspect, the fuselage of aircraft, eyelid covering, compressor, the electromotor of automobile, crankcase etc. often with aluminium alloy manufacture, with alleviate from
Weight.Using aluminium alloy to replace the welding of steel plate materials, construction weight can alleviate more than 50%.
Summary of the invention
It is an object of the invention to provide a kind of anticorrosion aluminium, be achieved through the following technical solutions:
A kind of anticorrosion aluminium, is made up of following component: yittrium oxide and praseodymium oxide 0.28%, silicon by weight percentage
1.43%, copper 1.2%, ferrum 0.41%, cobalt and beryllium 0.86%, magnesium 0.45%, titanium and strontium and sulfur 0.032%, zinc 0.12%, chromium 0.02%, its
Remaining is aluminum.
Further, the interpolation mass ratio of described yittrium oxide and praseodymium oxide is yittrium oxide: praseodymium oxide is 5:7.
Further, the interpolation mass ratio of described cobalt and beryllium is cobalt: beryllium is 2:1.
Further, the interpolation mass ratio of described titanium and strontium and sulfur is titanium: strontium: sulfur is 2:4:1.
A kind of manufacture method of anticorrosion aluminium, including:
1), melting: by the silicon being equipped with by respective mass percent, copper, ferrum, magnesium, zinc, chromium, put into and join by described mass percent
In standby Al melt, smelting temperature is 700 DEG C, and smelting time, after 2 hours, adds yittrium oxide and praseodymium oxide, and smelting temperature is 704
DEG C, after melting 2 hours, adding cobalt and beryllium, smelting temperature is 706 DEG C, after melting 2 hours, adds titanium and strontium and sulfur, and melting 4 is little
Time, smelting temperature is 706 DEG C, obtains blend melt 1；
2), stirring: melting carries out twice stirring, each mixing time 18 minutes to described blend melt A after completing, and stirs for the first time
Mixing speed is 350r/min, and mixing speed is 800r/min for the second time, obtains blend melt 2；
3), refine: adding refining agent in described blend melt 2 and carry out refine, refining temperature is 718 DEG C, and refining time is 25
Minute, refine stands 30 minutes after completing, and obtains blend melt 3；Described scouring agent is made up of following composition by weight: fluorine
Change aluminum 4, potassium fluotitanate 1, Afluon (Asta) 3；
4), composition adjustment: test the mass percent shared by each described component difference in described blend melt 3, to quality hundred
The content of the described component that proportion by subtraction exists deviation is adjusted, it is ensured that the content of each described component its described percent mass corresponding
Ratio, obtains mixing solution 4；
5), described blend melt 4 being stood insulation, holding temperature is 718 DEG C, and temperature retention time is 18 minutes, obtains blend melt
5；
6), online degasification: being passed through argon in described blend melt 5 and be stirred, the degasification time is 20 minutes, obtains
Blend melt 6；
7), filter: described blend melt 6 is carried out three-stage filtration, and the first order is filtered into 20ppi, and the second level is filtered into 40ppi,
The third level is filtered into 60ppi, and during filtration, described blend melt 6 controls, at 740 DEG C, to obtain blend melt 7；
8), cast: described blend melt 7 is carried out low liquid level casting, and liquid level is 120mm, and casting speed is 15mm/min,
Discharge is 550L/min, finally carries out fast cold treatment, and cooling rate is 0.15 DEG C/s, obtains aluminium alloy.
Generating the such as short pole crystal grain of needle-like when the eutectic Si of Al-Si system alloy crystallizes, its intensity and toughness are the lowest.And it is big
Most aluminium alloys are in the solid state without phase transformation, it is impossible to adjust size by heat treatment, and will be by controlling its primary crystallization mistake
Journey adjusts crystallite dimension, crystal grain thinning, thus improves aluminium alloy capability；Add the titanium of fixed mixing ratio, strontium, element sulphur can be by
The crystal grain of the eutectic Si of Al-Si system alloy refines and becomes granular, makes the intensity of alloy and toughness obtain large increase, Ke Yizhong
With the illeffects of ferrum element, the percentage elongation of iron content 0.41% alloy can be brought up to 4.8% by 0.8%, tensile strength by
172MPa increases to 198MPa.After with the addition of cobalt and the beryllium element of fixed mixing ratio in aluminium alloy, casting can be made after addition to produce good
Good crystal grain refinement, excellent thinning effect makes foundry goods obtain tiny equiax crystal, eliminates that feather is brilliant and column crystal, for after
Processing provide good inherent organizational structure, can efficiently against casting crack, reduce ingot casting cold shut, it is possible to increase alloy
Intensity, improves elongation percentage and toughness.
By adding yittrium oxide and the praseodymium oxide of fixed mixing ratio, both synergism improve the corrosion resistance of aluminium alloy.
When the total content adding yittrium oxide and praseodymium oxide is 0.28%, and when adding with the proportioning of 5:7, the corrosion resistance of aluminium alloy is best,
Modification effect is the most notable；In abrasion cycle, its average corrosion weightlessness of more non-modified alloy reduces by 56.21%, average corrosion speed
Rate reduces 28%, and aluminium alloy corrosion potential improves 560mV, simultaneously corrosion initial stage surface film oxide the most completely, higher
Reaction resistance inhibits the generation of spot corrosion.Add yittrium oxide with the alloy of praseodymium oxide compared with un-added aluminium alloy, crystal grain chi
Very little being obviously reduced, tissue is in substantially refinement, yittrium oxide and praseodymium oxide are evenly distributed on crystal grain after adding and grain boundaries, make crystal boundary,
Crystal grain composition tends to uniformity, reduces electrochemical corrosion.
Chromium has certain invigoration effect to aluminium alloy, moreover it is possible to improves alloy ductility and reduces stress corrosion opening cracking maleate sensitivity.
But can increase quenching sensitive, making anode oxide film is yellow；Zinc is individually added in aluminum, to intensity of aluminum alloy under deformation condition
Raising extremely limited, there is stress corrosion cracking, tendency simultaneously, thus limit its application；The application is through a large amount of real
Test research to draw by adding 0.12% zinc and the mating reaction of 0.02% chromium, quenching sensitive can be reduced, it is to avoid oxide-film one-tenth
The problem of yellow, moreover it is possible to solve, when zinc individually adds, intensity of aluminum alloy is improved limited problem, avoid stress corrosion simultaneously
Cracking, tendency, drastically increase the combination property of aluminium alloy.
The invention have the benefit that and aluminium alloy of the present invention with the addition of the titanium of fixed mixing ratio, strontium, element sulphur, effectively carry
After the intensity of high aluminium alloy and toughness, and the cobalt of the fixed mixing ratio added in aluminium alloy and beryllium element, casting after addition, can be made
Product produce good crystal grain refinement, effectively overcome casting crack, improve casting of appearance of cast, improve surface quality, add fixed mixing ratio
Yittrium oxide and praseodymium oxide, both synergism improve the corrosion resistance of aluminium alloy, and the present invention is effectively increased aluminium alloy
Impact flexibility 25.4%.
Detailed description of the invention
A kind of anticorrosion aluminium, it is characterised in that be made up of following component by weight percentage: yittrium oxide and oxidation
Praseodymium 0.28%, silicon 1.43%, copper 1.2%, ferrum 0.41%, cobalt and beryllium 0.86%, magnesium 0.45%, titanium and strontium and sulfur 0.032%, zinc 0.12%,
Chromium 0.02%, remaining is aluminum.
A kind of anticorrosion aluminium the most according to claim 1, it is characterised in that described yittrium oxide and praseodymium oxide
Interpolation mass ratio is yittrium oxide: praseodymium oxide is 5:7.
A kind of anticorrosion aluminium the most according to claim 1, it is characterised in that the interpolation quality of described cobalt and beryllium
Ratio is cobalt: beryllium is 2:1.
A kind of anticorrosion aluminium the most according to claim 1, it is characterised in that described titanium and strontium and the interpolation of sulfur
Mass ratio is titanium: strontium: sulfur is 2:4:1.
5. according to the manufacture method of a kind of anticorrosion aluminium described in claim 1-4, it is characterised in that including:
1), melting: by the silicon being equipped with by respective mass percent, copper, ferrum, magnesium, zinc, chromium, put into and join by described mass percent
In standby Al melt, smelting temperature is 700 DEG C, and smelting time, after 2 hours, adds yittrium oxide and praseodymium oxide, and smelting temperature is 704
DEG C, after melting 2 hours, adding cobalt and beryllium, smelting temperature is 706 DEG C, after melting 2 hours, adds titanium and strontium and sulfur, and melting 4 is little
Time, smelting temperature is 706 DEG C, obtains blend melt 1；
2), stirring: melting carries out twice stirring, each mixing time 18 minutes to described blend melt A after completing, and stirs for the first time
Mixing speed is 350r/min, and mixing speed is 800r/min for the second time, obtains blend melt 2；
3), refine: adding refining agent in described blend melt 2 and carry out refine, refining temperature is 718 DEG C, and refining time is 25
Minute, refine stands 30 minutes after completing, and obtains blend melt 3；Described scouring agent is made up of following composition by weight: fluorine
Change aluminum 4, potassium fluotitanate 1, Afluon (Asta) 3；
4), composition adjustment: test the mass percent shared by each described component difference in described blend melt 3, to quality hundred
The content of the described component that proportion by subtraction exists deviation is adjusted, it is ensured that the content of each described component its described percent mass corresponding
Ratio, obtains mixing solution 4；
5), described blend melt 4 being stood insulation, holding temperature is 718 DEG C, and temperature retention time is 18 minutes, obtains blend melt
5；
6), online degasification: being passed through argon in described blend melt 5 and be stirred, the degasification time is 20 minutes, obtains
Blend melt 6；
7), filter: described blend melt 6 is carried out three-stage filtration, and the first order is filtered into 20ppi, and the second level is filtered into 40ppi,
The third level is filtered into 60ppi, and during filtration, described blend melt 6 controls, at 740 DEG C, to obtain blend melt 7；
8), cast: described blend melt 7 is carried out low liquid level casting, and liquid level is 120mm, and casting speed is 15mm/min,
Discharge is 550L/min, finally carries out fast cold treatment, and cooling rate is 0.15 DEG C/s, obtains aluminium alloy.
Generating the such as short pole crystal grain of needle-like when the eutectic Si of Al-Si system alloy crystallizes, its intensity and toughness are the lowest.And it is big
Most aluminium alloys are in the solid state without phase transformation, it is impossible to adjust size by heat treatment, and will be by controlling its primary crystallization mistake
Journey adjusts crystallite dimension, crystal grain thinning, thus improves aluminium alloy capability；Add the titanium of fixed mixing ratio, strontium, element sulphur can be by
The crystal grain of the eutectic Si of Al-Si system alloy refines and becomes granular, makes the intensity of alloy and toughness obtain large increase, Ke Yizhong
With the illeffects of ferrum element, the percentage elongation of iron content 0.41% alloy can be brought up to 4.8% by 0.8%, tensile strength by
172MPa increases to 198MPa.After with the addition of cobalt and the beryllium element of fixed mixing ratio in aluminium alloy, casting can be made after addition to produce good
Good crystal grain refinement, excellent thinning effect makes foundry goods obtain tiny equiax crystal, eliminates that feather is brilliant and column crystal, for after
Processing provide good inherent organizational structure, can efficiently against casting crack, reduce ingot casting cold shut, it is possible to increase alloy
Intensity, improves elongation percentage and toughness.
By adding yittrium oxide and the praseodymium oxide of fixed mixing ratio, both synergism improve the corrosion resistance of aluminium alloy.
When the total content adding yittrium oxide and praseodymium oxide is 0.28%, and when adding with the proportioning of 5:7, the corrosion resistance of aluminium alloy is best,
Modification effect is the most notable；In abrasion cycle, its average corrosion weightlessness of more non-modified alloy reduces by 56.21%, average corrosion speed
Rate reduces 28%, and aluminium alloy corrosion potential improves 560mV, simultaneously corrosion initial stage surface film oxide the most completely, higher
Reaction resistance inhibits the generation of spot corrosion.Add yittrium oxide with the alloy of praseodymium oxide compared with un-added aluminium alloy, crystal grain chi
Very little being obviously reduced, tissue is in substantially refinement, yittrium oxide and praseodymium oxide are evenly distributed on crystal grain after adding and grain boundaries, make crystal boundary,
Crystal grain composition tends to uniformity, reduces electrochemical corrosion.
Claims (5)
1. an anticorrosion aluminium, it is characterised in that be made up of following component by weight percentage: yittrium oxide and praseodymium oxide
0.28%, silicon 1.43%, copper 1.2%, ferrum 0.41%, cobalt and beryllium 0.86%, magnesium 0.45%, titanium and strontium and sulfur 0.032%, zinc 0.12%, chromium
0.02%, remaining is aluminum.
A kind of anticorrosion aluminium the most according to claim 1, it is characterised in that described yittrium oxide and the interpolation of praseodymium oxide
Mass ratio is yittrium oxide: praseodymium oxide is 5:7.
A kind of anticorrosion aluminium the most according to claim 1, it is characterised in that the interpolation mass ratio of described cobalt and beryllium
For cobalt: beryllium is 2:1.
A kind of anticorrosion aluminium the most according to claim 1, it is characterised in that the interpolation quality of described titanium and strontium and sulfur
Ratio is titanium: strontium: sulfur is 2:4:1.
5. according to the manufacture method of a kind of anticorrosion aluminium described in claim 1-4, it is characterised in that including:
1), melting: by the silicon being equipped with by respective mass percent, copper, ferrum, magnesium, zinc, chromium, put into and join by described mass percent
In standby Al melt, smelting temperature is 700 DEG C, and smelting time, after 2 hours, adds yittrium oxide and praseodymium oxide, and smelting temperature is 704
DEG C, after melting 2 hours, adding cobalt and beryllium, smelting temperature is 706 DEG C, after melting 2 hours, adds titanium and strontium and sulfur, and melting 4 is little
Time, smelting temperature is 706 DEG C, obtains blend melt 1；
2), stirring: melting carries out twice stirring, each mixing time 18 minutes to described blend melt A after completing, and stirs for the first time
Mixing speed is 350r/min, and mixing speed is 800r/min for the second time, obtains blend melt 2；
3), refine: adding refining agent in described blend melt 2 and carry out refine, refining temperature is 718 DEG C, and refining time is 25
Minute, refine stands 30 minutes after completing, and obtains blend melt 3；Described scouring agent is made up of following composition by weight: fluorine
Change aluminum 4, potassium fluotitanate 1, Afluon (Asta) 3；
4), composition adjustment: test the mass percent shared by each described component difference in described blend melt 3, to quality hundred
The content of the described component that proportion by subtraction exists deviation is adjusted, it is ensured that the content of each described component its described percent mass corresponding
Ratio, obtains mixing solution 4；
5), described blend melt 4 being stood insulation, holding temperature is 718 DEG C, and temperature retention time is 18 minutes, obtains blend melt
5；
6), online degasification: being passed through argon in described blend melt 5 and be stirred, the degasification time is 20 minutes, obtains
Blend melt 6；
7), filter: described blend melt 6 is carried out three-stage filtration, and the first order is filtered into 20ppi, and the second level is filtered into 40ppi,
The third level is filtered into 60ppi, and during filtration, described blend melt 6 controls, at 740 DEG C, to obtain blend melt 7；
8), cast: described blend melt 7 is carried out low liquid level casting, and liquid level is 120mm, and casting speed is 15mm/min,
Discharge is 550L/min, finally carries out fast cold treatment, and cooling rate is 0.15 DEG C/s, obtains aluminium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610332667.0A CN105925857A (en) | 2016-05-18 | 2016-05-18 | Corrosion-resistant aluminum alloy |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604214A (en) * | 2017-11-10 | 2018-01-19 | 广西丰达三维科技有限公司 | A kind of engineering goods aluminum alloy materials |
| CN107675032A (en) * | 2017-11-10 | 2018-02-09 | 广西丰达三维科技有限公司 | A kind of anticorrosion aluminium material |
| CN107739903A (en) * | 2017-11-10 | 2018-02-27 | 广西丰达三维科技有限公司 | A kind of electronic product aluminum alloy materials |
| CN107739904A (en) * | 2017-11-10 | 2018-02-27 | 广西丰达三维科技有限公司 | A kind of aluminium alloy and its application |
| CN107858538A (en) * | 2017-11-10 | 2018-03-30 | 广西丰达三维科技有限公司 | A kind of preparation technology of the aluminum alloy materials with good oxidation resistance energy |
| CN108048700A (en) * | 2017-12-29 | 2018-05-18 | 南昌大学 | A kind of preparation method of the anticorrosion aluminium material containing praseodymium and cerium |
| CN108165842A (en) * | 2017-12-25 | 2018-06-15 | 广东省材料与加工研究所 | A kind of semisolid pressure casting high heat conduction aluminium alloy and its pressure casting method |
| TWI765596B (en) * | 2020-03-11 | 2022-05-21 | 日商昭和電工股份有限公司 | Corrosion Resistant Components |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604214A (en) * | 2017-11-10 | 2018-01-19 | 广西丰达三维科技有限公司 | A kind of engineering goods aluminum alloy materials |
| CN107675032A (en) * | 2017-11-10 | 2018-02-09 | 广西丰达三维科技有限公司 | A kind of anticorrosion aluminium material |
| CN107739903A (en) * | 2017-11-10 | 2018-02-27 | 广西丰达三维科技有限公司 | A kind of electronic product aluminum alloy materials |
| CN107739904A (en) * | 2017-11-10 | 2018-02-27 | 广西丰达三维科技有限公司 | A kind of aluminium alloy and its application |
| CN107858538A (en) * | 2017-11-10 | 2018-03-30 | 广西丰达三维科技有限公司 | A kind of preparation technology of the aluminum alloy materials with good oxidation resistance energy |
| CN108165842A (en) * | 2017-12-25 | 2018-06-15 | 广东省材料与加工研究所 | A kind of semisolid pressure casting high heat conduction aluminium alloy and its pressure casting method |
| CN108048700A (en) * | 2017-12-29 | 2018-05-18 | 南昌大学 | A kind of preparation method of the anticorrosion aluminium material containing praseodymium and cerium |
| CN108048700B (en) * | 2017-12-29 | 2020-03-27 | 南昌大学 | Preparation method of praseodymium and cerium-containing corrosion-resistant aluminum alloy material |
| TWI765596B (en) * | 2020-03-11 | 2022-05-21 | 日商昭和電工股份有限公司 | Corrosion Resistant Components |
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