CN107400810A - The high tough corrosion-resistant eutectic Al Si cast aluminium alloy golds and preparation method of a kind of Zr and Sr combined microalloyings - Google Patents
The high tough corrosion-resistant eutectic Al Si cast aluminium alloy golds and preparation method of a kind of Zr and Sr combined microalloyings Download PDFInfo
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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
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
Abstract
High tough corrosion-resistant eutectic Al Si cast aluminium alloy golds of a kind of Zr and Sr combined microalloyings and preparation method thereof, it is characterized in that described aluminium alloy is mainly by aluminium（Al）, silicon（Si）, zirconium（Zr）, strontium（Sr）And iron（Fe）Composition, described preparation method include successively：（（1）First, 850 ± 10 DEG C are warming up to after pure Al and Al Si intermediate alloys are melted, then sequentially adds Al Zr, Al Sr intermediate alloys；（2）After all intermediate alloys and metal molten, 750 ± 10 DEG C are adjusted the temperature to, removing slag and pouring into is preheated in 300 ± 10 DEG C of metal die ingot of casting.Aluminium alloy as-cast structure of the present invention is fine and close, and as cast condition actual measurement impact flexibility is 11.1~22.1J/cm2, while its intensity is 180.79~183.09MPa, elongation percentage is 7.76 ~ 8.35 %, meets the manufacture demand of the high tough corrosion-resisting aluminum casting alloy structural member of large-scale complex thin-wall.
Description
Technical field
The present invention relates to a kind of aluminum alloy materials and preparation method thereof, especially a kind of tough corrosion-resistant eutectic of novel high-strength
Al-Si systems cast aluminium alloy gold and preparation method thereof, specifically a kind of Zr and Sr combined microalloyings it is high tough corrosion-resistant
Eutectic Al-Si cast aluminium alloy gold and preparation method thereof.
Background technology
Al-Si systems cast aluminium alloy gold is currently to apply most cast aluminium alloy materials, the board of these alloys in the industry
Number have：YL102（AlSi12）、YL112（AlSi8.5Cu3.5）、YL113（AlSi811Cu3）, Japanese ADC12
（AlSi11Cu3）、ADC10（AlSi8.5Cu3.5）And the A380 in the U.S.（AlSi8.5Cu3.5）Deng these alloys have excellent
Different casting character, higher intensity and good corrosion resistance, but its plasticity, toughness are relatively low, limiting it should
With.
The mechanical property of Al-Si systems cast aluminium alloy gold and its second phase in organizing（Si phases）Form, size, distribution it is tight
Close correlation, refinement Si phases are to reduce Si isolating so as to improve effective way of Al-Si systems cast aluminium alloy capability with respect to matrix Al
Footpath.Strontium（Sr）Element is a kind of effectively long-acting alterant in aluminium alloy, not only can effectively refine Al-Si systems casting aluminium
Si phases in alloy, and can be effectively in refining alloy FeSiAl5Etc. compound phase.It is well known that zirconium（Zr）Element is
A kind of and strong 3d transition elements of Al affinity, are added in aluminium alloy, the zirconium in alloy graining process（Zr）Element and Al
Form A13Zr（1580 DEG C of fusing point）Deng high-melting-point thing phase, Heterogeneous Nucleation effect is played in the follow-up solidification to alloy, is not only refined
Alloy casting state matrix, promote tiny equiax crystal to be formed, and improve the mobility and Elemental redistribution uniformity of liquid alloy.
Therefore, Zr and Sr combined microalloying can not reduce alloy casting character, intensity, corrosion resistance it is same
When, greatly improve the plasticity and toughness of alloy.
Up to the present, there has been no a kind of the high tough of Zr and Sr combined microalloyings with independent intellectual property right in China
Corrosion-resistant eutectic Al-Si system cast aluminium alloy gold and preparation method thereof is available, and this constrains China's high-performance to a certain extent
The development of cast aluminium alloy gold and its product industry.
The content of the invention
The purpose of the present invention be for current Al-Si systems cast aluminium alloy gold plasticity, toughness is relatively low the problem of, invention is a kind of to exist
On the basis of Al-Si systems cast aluminium alloy gold composition design, by adding zirconium（Zr）And strontium（Sr）Element carries out combined microalloying,
Do not reducing alloy casting character（Mobility）While, Si phases and compound phase in efficient refining alloy, greatly improve conjunction
Plasticity, the toughness of gold, obtain a kind of eutectic Al-Si system Cast aluminium alloy for having excellent casting character and obdurability corrosion resistance concurrently
Gold, while its preparation method is provided.
One of technical scheme is：
A kind of high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold of Zr and Sr combined microalloyings, it is characterised in that：It is main
By aluminium（Al）, silicon（Si）, zirconium（Zr）And strontium（Sr）Composition, wherein, silicon（Si）Mass percent be 11.8~12.06%, zirconium
（Zr）Mass percent be 0.127~0.128%, strontium（Sr）Mass percent be 0.0303~0.0314%, surplus is aluminium
With a small amount of impurity element（Such as the iron that mass percent is 0.199~0.220%）, the mass percent sum of each component is 100%.
The two of technical scheme are：
A kind of preparation method of the high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold of Zr and Sr combined microalloyings, its feature
It is that its preparation process includes successively：
（1）First, 850 ± 10 DEG C are warming up to after pure Al and Al-Si intermediate alloys are melted, is then sequentially added among Al-Zr
Alloy, Al-Sr intermediate alloys；
（2）Secondly, after all intermediate alloys and metal molten, 750 ± 10 DEG C are adjusted the temperature to, carbon trichloride refining is added and removes
Gas escapes up to without gas, removes slag after 5~10 min of standing insulation and pours into be preheated in 300 ± 10 DEG C of metal die and pours
Ingot is cast, that is, obtains the high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold ingot casting of Zr and Sr combined microalloyings.
Si mass percent is the quality hundred of Cu in 19.29%, Al-Cu intermediate alloys in described Al-Si intermediate alloys
It is 4.11% to divide the mass percent that ratio is Zr in 50.12%, Al-Zr intermediate alloys, Sr quality hundred in Al-Sr intermediate alloys
Divide than being 9.89%.
Beneficial effects of the present invention：
（1）It is 11.1~22.1/cm present invention obtains a kind of room temperature non-notch impact flexibility2（By GB/T 229-2007 gold
Belong to material Charpy pendulum impact test method）, intensity is 180.79~183.09MPa, elongation percentage is 7.76 ~ 8.35%, fracture
In the typical ductile rupture of dimple feature；Hardness is 65.5 ~ 71.7 HV, electrical conductivity is 42.9 ~ 43.3% IACS；3.5%
93 h, average corrosion rate are soaked in the NaCl aqueous solution at a temperature of 37 DEG C（It is uniformly rotten by GB 1024-88 metal materials laboratory
Lose total immersion test method）For 0.062086042 ~ 0.073017083 mm/y high tough corrosion-resistant Al-Si systems cast aluminium alloy gold.
（2）The present invention adds zirconium on the basis of Al-Si systems cast aluminium alloy gold composition design, by adjusting（Zr）And strontium
（Sr）Element carries out combined microalloying, while the guarantee alloy structure densification of alloy casting character is not reduced, efficiently refinement
Si phases and compound phase in alloy, the toughness of alloy, intensity, plasticity and corrosion-resistant greatly improved.
（3）In submicron order, shape is in granular form or short the Si phase sizes of eutectic Al-Si system of the present invention cast aluminium alloy gold
It is bar-shaped, and draw ratio is less than or equal to 2.
（4）The invention discloses a kind of composition and preparation method of high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold,
The external technology blockage to high performance casting aluminium alloy is broken to a certain extent, can meet that Chinese large-sized complex thin-wall height is tough
Corrosion-resisting aluminum casting alloy product manufacturing demand.
（5）The present invention obtains preferable preparation method by largely testing, and is added in order especially by using
The method of each intermediate alloy and simple metal controls each component content, can be readily derived by the technique of the present invention satisfactory
Aluminum alloy materials.
Brief description of the drawings
Fig. 1 is the high tough corrosion-resistant eutectic Al-Si system casting of the Zr and Sr combined microalloyings of the embodiment of the present invention one
The metallographic structure optical microscope photograph of aluminium alloy.
Fig. 2 is the high tough corrosion-resistant eutectic Al-Si system casting of the Zr and Sr combined microalloyings of the embodiment of the present invention one
The metallographic structure electron scanning micrograph of aluminium alloy.
Fig. 3 is the high tough corrosion-resistant eutectic Al-Si system casting of the Zr and Sr combined microalloyings of the embodiment of the present invention one
The room temperature non-notch impact flexibility performance test fracture surface of sample electron scanning micrograph of aluminium alloy.
Fig. 4 is the high tough corrosion-resistant eutectic Al-Si system casting of the Zr and Sr combined microalloyings of the embodiment of the present invention one
The tensile property test sample Fracture scan electron micrograph of aluminium alloy.
Fig. 5 is the high tough corrosion-resistant eutectic Al-Si system casting of the Zr and Sr combined microalloyings of the embodiment of the present invention one
The corrosive nature test sample metallographic surface Scanning Electron microphotograph of aluminium alloy.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment one.
A kind of high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold of Zr and Sr combined microalloyings, it passes through following system
Preparation Method is prepared：
First by Al-Si, (80.54 %Al, 19.29%Si, 0.17% Fe, all components of the present invention use mass percent table
Show, those skilled in the art can obtain the quality or weight of each component by conventional algorithm, and similarly hereinafter, all components are added deficiency
100% part is impurity) intermediate alloy and the pure Al of A00 grades（99.79%Al, 0.14%Fe, 0.04%Si）Risen after fusing
Then temperature is sequentially added and closed among Al-Zr (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si) to 850 ± 10 DEG C
Gold, Al-Sr (89.86%Al, 9.89%Sr, 0.15%Fe, 0.10%Si) intermediate alloy；Treat that all intermediate alloys and metal melt
After change, 750 ± 10 DEG C are adjusted the temperature to, carbon trichloride refining degasification is added until being escaped without gas, stands insulation 5~10
Remove slag and pour into after min and be preheated in 300 ± 10 DEG C of metal die ingot of casting；It is composite micro-alloyed to obtain a kind of Zr and Sr
The high tough corrosion-resistant Al-Si systems cast aluminium alloy gold of change.
The high tough corrosion-resistant Al-Si systems cast aluminium alloy gold of the Sr and Zr combined microalloyings of the present embodiment is actual through spectrum
Measuring its composition is：11.8%Si, 0.127%Zr, 0.0303%Sr, 0.199%Fe, surplus are aluminium and impurity element.
The high tough corrosion-resistant eutectic Al-Si system Cast aluminium alloy payment organization of the Sr and Zr combined microalloyings of the present embodiment causes
It is close（Fig. 1）, Si phases are tiny, and size is in granular form or corynebacterium in submicron order, shape, and draw ratio is less than or equal to 2（Fig. 1,
Fig. 2）；Room temperature non-notch impact flexibility is 22.1J/cm2（By GB/T 229-2007 metal materials Charpy pendulum impact test side
Method）, impact toughness sample fracture is in the typical ductile rupture of dimple feature（Fig. 3）；Intensity is 180.79MPa, elongation percentage is
7.76%, tensile sample fracture is in the typical ductile rupture of dimple feature（Fig. 4）；Its hardness is 65.5HV, electrical conductivity is
42.9% IACS, the uniform corrosion rate that 93 hours are soaked in the 3.5% NaCl aqueous solution at a temperature of 37 DEG C（By GB 1024-
88 Uniform Corrosion Method of Laboratory Immersion Test methods）It is tiny for 0.073017083 mm/y, corrosion surface Si phase sizes
（Fig. 5）.
Embodiment two.
A kind of high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold of Zr and Sr combined microalloyings, it passes through following system
Preparation Method is prepared：
First by Al-Si, (80.54 %Al, 19.29%Si, 0.17% Fe, all components of the present invention use mass percent table
Show, those skilled in the art can obtain the quality or weight of each component by conventional algorithm, and similarly hereinafter, all components are added deficiency
100% part is impurity) intermediate alloy and the pure Al of A00 grades（99.79%Al, 0.14%Fe, 0.04%Si）Risen after fusing
Then temperature is sequentially added and closed among Al-Zr (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si) to 850 ± 10 DEG C
Gold, Al-Sr (89.86%Al, 9.89%Sr, 0.15%Fe, 0.10%Si) intermediate alloy；Treat that all intermediate alloys and metal melt
After change, 750 ± 10 DEG C are adjusted the temperature to, carbon trichloride refining degasification is added until being escaped without gas, stands insulation 5~10
Remove slag and pour into after min and be preheated in 300 ± 10 DEG C of metal die ingot of casting；It is composite micro-alloyed to obtain a kind of Zr and Sr
The high tough corrosion-resistant Al-Si systems cast aluminium alloy gold of change.
The high tough corrosion-resistant Al-Si systems cast aluminium alloy gold of the Sr and Zr combined microalloyings of the present embodiment is actual through spectrum
Measuring its composition is：11.9%Si, 0.128%Zr, 0.0314%Sr, 0.220%Fe, surplus are aluminium and impurity element.
The high tough corrosion-resistant eutectic Al-Si system Cast aluminium alloy payment organization of the Sr and Zr combined microalloyings of the present embodiment causes
Close, Si phases are tiny, and size is in granular form or corynebacterium in submicron order, shape, and draw ratio is less than or equal to 2；Room temperature is intact
Mouth impact flexibility is 11.1J/cm2（By GB/T 229-2007 metal material Charpy pendulum impact test methods）, impact flexibility
Fracture surface of sample is in the typical ductile rupture of dimple feature；Intensity is 183.09MPa, elongation percentage 8.35%, tensile sample fracture
In the typical ductile rupture of dimple feature；Its hardness is 68.8HV, electrical conductivity is 42.9% IACS, in the 3.5% NaCl aqueous solution
In the uniform corrosion rate of 93 hours is soaked at a temperature of 37 DEG C（Examination is soaked entirely by GB 1024-88 metal materials laboratory homogeneous corrosion
Proved recipe method）It is tiny for 0.062086042mm/y, corrosion surface Si phase sizes.
Embodiment.
A kind of high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold of Zr and Sr combined microalloyings, it passes through following system
Preparation Method is prepared：
First by Al-Si (80.54 %Al, 19.29%Si, 0.17% Fe) intermediate alloys and the pure Al of A00 grades（99.79%Al,
0.14%Fe, 0.04%Si）850 ± 10 DEG C are warming up to after fusing, then sequentially add Al-Zr (95.69%Al, 4.11%Zr,
0.20%Fe, 0.10%Si) intermediate alloy, close among Al-Sr (89.86%Al, 9.89%Sr, 0.15%Fe, 0.10%Si)
Gold；After all intermediate alloys and metal molten, 750 ± 10 DEG C are adjusted the temperature to, adds carbon trichloride refining degasification until not having
There is gas effusion, removing slag and pour into after 5~10 min of standing insulation is preheated in 300 ± 10 DEG C of metal die ingot of casting；
Obtain a kind of high tough corrosion-resistant Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings.
The high tough corrosion-resistant Al-Si systems cast aluminium alloy gold of the Sr and Zr combined microalloyings of the present embodiment is actual through spectrum
Measuring its composition is：12.06%Si, 0.127%Zr, 0.0308%Sr, 0.201%Fe, surplus are aluminium and impurity element.
The high tough corrosion-resistant eutectic Al-Si system Cast aluminium alloy payment organization of the Sr and Zr combined microalloyings of the present embodiment causes
Close, Si phases are tiny, and size is in granular form or corynebacterium in submicron order, shape, and draw ratio is less than or equal to 2；Room temperature is intact
Mouth impact flexibility is 19.8J/cm2（By GB/T 229-2007 metal material Charpy pendulum impact test methods）, impact flexibility
Fracture surface of sample is in the typical ductile rupture of dimple feature；Intensity is 181.23MPa, elongation percentage 7.93%, tensile sample fracture
In the typical ductile rupture of dimple feature；Its hardness is 71.7HV, electrical conductivity is 43.3% IACS, water-soluble in 3.5% NaCl
The uniform corrosion rate of 93 hours is soaked in liquid at a temperature of 37 DEG C（Soaked entirely by GB 1024-88 metal materials laboratory homogeneous corrosion
Test method）It is tiny for 0.071143511mm/y, corrosion surface Si phase sizes.
Example IV.
A kind of high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold of Zr and Sr combined microalloyings, it passes through following system
Preparation Method is prepared：
First by Al-Si, (80.54 %Al, 19.29%Si, 0.17% Fe, all components of the present invention use mass percent table
Show, those skilled in the art can obtain the quality or weight of each component by conventional algorithm, and similarly hereinafter, all components are added deficiency
100% part is impurity) intermediate alloy and the pure Al of A00 grades（99.79%Al, 0.14%Fe, 0.04%Si）Risen after fusing
Then temperature is sequentially added and closed among Al-Zr (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si) to 850 ± 10 DEG C
Gold, Al-Sr (89.86%Al, 9.89%Sr, 0.15%Fe, 0.10%Si) intermediate alloy；Treat that all intermediate alloys and metal melt
After change, 750 ± 10 DEG C are adjusted the temperature to, carbon trichloride refining degasification is added until being escaped without gas, stands insulation 5~10
Remove slag and pour into after min and be preheated in 300 ± 10 DEG C of metal die ingot of casting；It is composite micro-alloyed to obtain a kind of Zr and Sr
The high tough corrosion-resistant Al-Si systems cast aluminium alloy gold of change.
The high tough corrosion-resistant Al-Si systems cast aluminium alloy gold of the Sr and Zr combined microalloyings of the present embodiment is actual through spectrum
Measuring its composition is：12%Si, 0.1275%Zr, 0.0310%Sr, Fe content are 0.199% or so, and surplus is aluminium and miscellaneous
Prime element.
The high tough corrosion-resistant eutectic Al-Si system Cast aluminium alloy payment organization of the Sr and Zr combined microalloyings of the present embodiment causes
Close, Si phases are tiny, and size is in granular form or corynebacterium in submicron order, shape, and draw ratio is less than or equal to 2；Room temperature is intact
Mouth impact flexibility is 19.7J/cm2（By GB/T 229-2007 metal material Charpy pendulum impact test methods）, impact flexibility
Fracture surface of sample is in the typical ductile rupture of dimple feature；Intensity is 183.21MPa, elongation percentage 7.98%, tensile sample fracture
In the typical ductile rupture of dimple feature；Its hardness is 72.7HV, electrical conductivity is 42.7% IACS, water-soluble in 3.5% NaCl
The uniform corrosion rate of 93 hours is soaked in liquid at a temperature of 37 DEG C（Soaked entirely by GB 1024-88 metal materials laboratory homogeneous corrosion
Test method）It is tiny for 0.072211435mm/y, corrosion surface Si phase sizes.
Only list above the aluminium alloy of common proportioning with when manufacture method, those skilled in the art can bases
Examples detailed above suitably adjusts the proportioning of each component and strictly by above-mentioned steps carries out manufacture and can obtain preferable Zr and Sr answering
Close the high tough corrosion-resistant Al-Si systems cast aluminium alloy gold of microalloying.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Claims (3)
1. high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold of a kind of Zr and Sr combined microalloyings and preparation method thereof, its
It is characterised by：It is mainly by aluminium（Al）, silicon（Si）, zirconium（Zr）And strontium（Sr）Composition, wherein, silicon（Si）Mass percent be
11.8~12.06%, zirconium（Zr）Mass percent be 0.127~0.128%, strontium（Sr）Mass percent for 0.0303~
0.0314%, surplus is aluminium and a small amount of impurity element, and the mass percent sum of each component is 100%.
A kind of 2. high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold of the Zr and Sr combined microalloyings described in claim 1
Preparation method, it is characterized in that its preparation process includes successively：
（1）First, 850 ± 10 DEG C are warming up to after pure Al and Al-Si intermediate alloys are melted, is then sequentially added among Al-Zr
Alloy, Al-Sr intermediate alloys；
（2）Secondly, after all intermediate alloys and metal molten, 750 ± 10 DEG C are adjusted the temperature to, carbon trichloride refining is added and removes
Gas escapes up to without gas, removes slag after 5~10 min of standing insulation and pours into be preheated in 300 ± 10 DEG C of metal die and pours
Ingot is cast, that is, obtains the high tough corrosion-resistant eutectic Al-Si cast aluminium alloy gold ingot casting of Zr and Sr combined microalloyings.
3. preparation method according to claim 2, it is characterized in that in described Al-Si intermediate alloys Si mass percent
The mass percent that mass percent for Cu in 19.29%, Al-Cu intermediate alloys is Zr in 50.12%, Al-Zr intermediate alloys
Mass percent for Sr in 4.11%, Al-Sr intermediate alloys is 9.89%.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838761A (en) * | 2010-03-15 | 2010-09-22 | 江苏大学 | Aluminum alloy 7085 microalloyed with strontium and preparation method thereof |
| CN102319963A (en) * | 2011-08-26 | 2012-01-18 | 桂林市庆通有色金属工艺材料开发有限公司 | Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal and preparation method thereof |
| CN105463269A (en) * | 2015-12-01 | 2016-04-06 | 上海交通大学 | High-strength and high-corrosion-resistance cast aluminum alloy and pressure casting preparation method thereof |
-
2017
- 2017-07-31 CN CN201710640251.XA patent/CN107400810A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838761A (en) * | 2010-03-15 | 2010-09-22 | 江苏大学 | Aluminum alloy 7085 microalloyed with strontium and preparation method thereof |
| CN102319963A (en) * | 2011-08-26 | 2012-01-18 | 桂林市庆通有色金属工艺材料开发有限公司 | Al-Si-Cu-Zn-Sn-Ni aluminum-based brazing filler metal and preparation method thereof |
| CN105463269A (en) * | 2015-12-01 | 2016-04-06 | 上海交通大学 | High-strength and high-corrosion-resistance cast aluminum alloy and pressure casting preparation method thereof |
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