CN107385289A - The high tough corrosion-resistant hypoeutectic Al Si systems cast aluminium alloy gold and preparation method of a kind of Zr and Sr combined microalloyings - Google Patents
The high tough corrosion-resistant hypoeutectic Al Si systems cast aluminium alloy gold and preparation method of a kind of Zr and Sr combined microalloyings Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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Abstract
The high tough corrosion-resistant hypoeutectic Al Si systems cast aluminium alloy gold and preparation method of a kind of Zr and Sr combined microalloyings, 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 includes successively：（1）First, furnace temperature is risen to 850 ± 10 DEG C, adds pure Al and Al Si intermediate alloys, intermediate alloy is sequentially added after all melting；（2）Secondly, after all intermediate alloys and metal molten, 750 ± 10 DEG C are adjusted the temperature to, for the refining degasification of addition carbon trichloride until being escaped without gas, 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.Aluminium alloy as-cast structure of the present invention is fine and close, and cast alloy actual measurement impact flexibility is 36.05 J/cm2, while its tensile strength is 177.89 MPa, elongation percentage 16.12%, the uniform corrosion rate in the 3.5%NaCl aqueous solution at a temperature of 37 DEG C are 0.071796302 mm/a.
Description
Technical field
The present invention relates to a kind of aluminum alloy materials and preparation method thereof, especially a kind of high tough corrosion-resistant hypoeutectic Al-
Si systems cast aluminium alloy gold and preparation method thereof, the high tough corrosion-resistant Asia of specifically a kind of Zr and Sr combined microalloyings is altogether
Brilliant Al-Si systems 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 this kind of alloy in the industry
Number just like：Domestic 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
Good casting character, higher intensity and good corrosion resistance, but its plasticity, toughness are relatively low.
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 can reduce Si isolating with respect to matrix Al, be the effective way for improving Al-Si systems cast aluminium alloy capability
Footpath.Zirconium（Zr）Element is a kind of and the strong 3d transition elements of Al affinity, when zirconium（Zr）Element is added in aluminium alloy,
Zirconium in alloy graining process（Zr）Element can form A1 with Al3Zr（1580 DEG C of fusing point）Deng high-melting-point thing phase, after alloy
Heterogeneous Nucleation effect is played in continuous solidification, and not only refining alloy as cast condition matrix, the tiny equiax crystal of promotion are formed, and improved
The mobility and Elemental redistribution uniformity of liquid alloy.Strontium（Sr）Element is a kind of effectively long-acting rotten in aluminium alloy
Agent, not only can effectively refine the Si phases in Al-Si systems cast aluminium alloy gold, and can be effectively in refining alloy FeSiAl5
Etc. compound phase.Therefore, Zr and Sr combined microalloying can not reduce alloy casting character, intensity, corrosion resistance
Meanwhile 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 hypoeutectic Al-Si systems cast aluminium alloy gold and preparation method thereof is available, and this constrains the high property in China to a certain extent
The development of energy 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 adjusting Si constituent contents, while trace zirconium is added（Zr）And strontium
（Sr）Element carries out combined microalloying, is not reducing alloy casting character（Mobility）While, in efficient refining alloy
Si phases and compound phase, plasticity, the toughness of alloy are greatly improved, acquisition one kind has excellent casting character concurrently and obdurability is corrosion-resistant
The Al-Si systems cast aluminium alloy gold of property, while its preparation method is provided.
One of technical scheme is：
A kind of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings, it is characterised in that：It
Mainly by aluminium（Al）, silicon（Si）, zirconium（Zr）And strontium（Sr）Composition, wherein, silicon（Si）Mass percent be 7.68 ~ 8.18 %,
Zirconium（Zr）Mass percent be 0.184 ~ 0.191%, strontium（Sr）Mass percent be 0.0199 ~ 0.023%, surplus be aluminium and
A small amount of impurity element（Such as the iron that mass percent is about 0.133 ~ 0.149%）, 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 hypoeutectic Al-Si cast aluminium alloy golds of Zr and Sr combined microalloyings, it is special
Sign is that its preparation process includes successively：
（1）First, furnace temperature is risen to 850 ± 10 DEG C, adds pure Al and Al-Si intermediate alloys, sequentially added after all melting
Al-Zr intermediate alloys, 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 high tough corrosion-resistant hypoeutectic Al-Si cast aluminium alloy golds.
Si mass percent is the quality of Zr in 10.21%, Al-Zr intermediate alloys in described Al-Si intermediate alloys
The mass percent that percentage is Sr in 4.11%, Al-Sr intermediate alloys is 9.89%.
Pure Al is the pure Al of A00 grades, composition：99.79%Al, 0.14%Fe, 0.04%Si.
Beneficial effects of the present invention：
（1）It is 36.05 J/cm present invention obtains a kind of room temperature non-notch impact flexibility2（By GB/T 229-2007 metal materials
Expect Charpy pendulum impact test method）, fracture is in the typical ductile rupture of dimple feature；Intensity is 177.89MPa, elongation percentage is
16.12%（By GB/T228-2002 metal material tensile testing at ambient temperature）, fracture is in the typical ductile rupture of dimple feature；
Hardness is 59.925HV, electrical conductivity 44.03%IACS（With reference to GB/T12966-2008 aluminium alloy electric conductances Eddy current test side
Method）；Average homogeneous corrosion rate after 93 h is soaked at a temperature of 37 DEG C in the 3.5% NaCl aqueous solution（By GB 1024-88 metals
Material laboratory homogeneous corrosion total immersion test method）For 0.071796302 mm/a high tough corrosion-resistant hypoeutectic Al-Si systems
Cast aluminium alloy gold.
（2）The present invention is on the basis of Al-Si systems cast aluminium alloy gold composition design, by adjusting Si constituent contents, simultaneously
Add trace zirconium（Zr）And strontium（Sr）Element carries out combined microalloying, ensures that alloy structure causes not reducing alloy casting character
While close property, efficiently refined Si phases and compound phase in alloy, greatly improved the toughness of alloy, intensity, plasticity and
Corrosion resistance.
（3）Si phase sizes in Al-Si systems of the present invention cast aluminium alloy gold are in submicron order, and shape is in granular form or stub
Shape, and draw ratio is less than or equal to 2.
（4）The invention discloses a kind of composition of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold and preparation side
Method, the external technology blockage to high performance casting aluminium alloy is broken to a certain extent, Chinese large-sized complex thin-wall height can be met
The demand of tough corrosion-resisting aluminum casting alloy product manufacturing.
（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 hypoeutectic Al-Si systems casting of the Zr and Sr combined microalloyings of the embodiment of the present invention one
Make the metallographic structure optical microscope photograph of aluminium alloy.
Fig. 2 is the high tough corrosion-resistant hypoeutectic Al-Si systems casting of the Zr and Sr combined microalloyings of the embodiment of the present invention one
Make the metallographic structure electron scanning micrograph of aluminium alloy.
Fig. 3 is the high tough corrosion-resistant hypoeutectic Al-Si systems casting of the Zr and Sr combined microalloyings of the embodiment of the present invention one
Make the room temperature non-notch impact flexibility test sample Fracture scan electron micrograph of aluminium alloy.
Fig. 4 is the high tough corrosion-resistant hypoeutectic Al-Si systems casting of the Zr and Sr combined microalloyings of the embodiment of the present invention one
Make the room temperature tensile properties fracture surface of sample electron scanning micrograph of aluminium alloy.
Fig. 5 is the high tough corrosion-resistant hypoeutectic Al-Si systems casting of the Zr and Sr combined microalloyings of the embodiment of the present invention one
Make 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.
As shown in Fig. 1,2,3,4,5.
A kind of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings, its preparation side
Method：
Furnace temperature is first risen to 850 ± 10 DEG C, adding Al-Si, (89.62 %Al, 10.21%Si, 0.17% Fe, the present invention are all
Component represents that those skilled in the art can obtain gravimetric value according to ratio using conventional algorithm using mass percent, under
Together, the part that all components is added less than 100% is impurity) intermediate alloy and the pure Al of A00 grades（99.79%Al, 0.14%Fe,
0.04%Si）, sequentially added after all melting among Al-Zr (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si)
Alloy, Al-Sr (89.86%Al, 9.89%Sr, 0.15%Fe, 0.10%Si) intermediate alloy；Treat all intermediate alloys and metal
After fusing, 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 hypoeutectic Al-Si systems cast aluminium alloy gold of change.
The high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of the Zr and Sr combined microalloyings of the present embodiment is through light
Spectrum reality measures composition：7.76 %Si, 0.185 %Zr, 0.0229 %Sr, 0.145 %Fe, surplus are aluminium and impurity
Element.
The high tough corrosion-resistant hypoeutectic Al-Si systems Cast aluminium alloy payment organization of the Zr and Sr combined microalloyings of the present embodiment
It is fine and 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（Figure
1st, Fig. 2）；Room temperature non-notch impact flexibility average value is 36.05 J/cm2（By GB/T 229-2007 metal material Charpy pendulus
Impact test method）, impact toughness sample fracture is in the typical ductile rupture of dimple feature（Fig. 3）；Tensile strength is
177.89MPa, elongation percentage 16.12%（By GB/T228-2002 metal material tensile testing at ambient temperature）, tensile sample breaks
Mouth is in the typical ductile rupture of dimple feature（Fig. 4）；Hardness is 59.925HV, electrical conductivity 44.03%IACS（With reference to GB/
T12966-2008 aluminium alloy electric conductance Eddy current test methods）；After 93 h being soaked in the 3.5% NaCl aqueous solution at a temperature of 37 DEG C
Uniform corrosion rate（By GB 1024-88 Uniform Corrosion Method of Laboratory Immersion Test methods）For 0.071796302
mm/a（Fig. 5）, corrosion surface Si phase sizes are tiny.
Embodiment two.
A kind of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings, its preparation side
Method：
Furnace temperature is first risen to 850 ± 10 DEG C, adding Al-Si, (89.62 %Al, 10.21%Si, 0.17% Fe, the present invention are all
Component represents that similarly hereinafter, the part that all components is added less than 100% is impurity using mass percent) intermediate alloy and A00
The pure Al of grade（99.79%Al, 0.14%Fe, 0.04%Si）, after all melt after sequentially add Al-Zr (95.69%Al,
4.11%Zr, 0.20%Fe, 0.10%Si) intermediate alloy, Al-Sr (89.86%Al, 9.89%Sr, 0.15%Fe, 0.10%Si)
Intermediate alloy；After all intermediate alloys and metal molten, 750 ± 10 DEG C are adjusted the temperature to, adds carbon trichloride refining degasification
Until being escaped without gas, removing slag after 510 min of standing insulation and pour into be preheated in 300 ± 10 DEG C of metal die is cast into
Ingot；Obtain a kind of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings.
The high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of the Zr and Sr combined microalloyings of the present embodiment is through light
Spectrum reality measures composition：7.68 %Si, 0.191 %Zr, 0.0199 %Sr, 0.149%Fe, surplus are aluminium and impurity member
Element.
The high tough corrosion-resistant hypoeutectic Al-Si systems Cast aluminium alloy payment organization of the Zr and Sr combined microalloyings of the present embodiment
Densification, Si phases are relatively fine, and size is in granular form or corynebacterium in submicron order, shape, and draw ratio is less than or equal to 2；Room temperature
Non-notch impact flexibility is 33.27 J/cm2（By GB/T 229-2007 metal material Charpy pendulum impact test methods）, punching
Hit the typical ductile rupture that toughness specimen fracture is in dimple feature；Tensile strength is 175.07MPa, elongation percentage 17.294%
（By GB/T228-2002 metal material tensile testing at ambient temperature）, tensile sample fracture is in that the typical toughness of dimple feature is broken
Split；Hardness is 58.2HV, electrical conductivity 41.824%IACS（With reference to GB/T12966-2008 aluminium alloy electric conductance Eddy current tests
Method）；Uniform corrosion rate after soaking 93 h at a temperature of 37 DEG C in the 3.5% NaCl aqueous solution（By GB 1024-88 metals
Material laboratory homogeneous corrosion total immersion test method）It is relatively fine for 0.093110265 mm/a, corrosion surface Si phase sizes.
Embodiment three.
A kind of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings, its preparation side
Method：
Furnace temperature is first risen to 850 ± 10 DEG C, adding Al-Si, (89.62 %Al, 10.21%Si, 0.17% Fe, the present invention are all
Component represents that similarly hereinafter, the part that all components is added less than 100% is impurity using mass percent) intermediate alloy and A00
The pure Al of grade（99.79%Al, 0.14%Fe, 0.04%Si）, after all melt after sequentially add Al-Zr (95.69%Al,
4.11%Zr, 0.20%Fe, 0.10%Si) intermediate alloy, Al-Sr (89.86%Al, 9.89%Sr, 0.15%Fe, 0.10%Si)
Intermediate alloy；After all intermediate alloys and metal molten, 750 ± 10 DEG C are adjusted the temperature to, adds carbon trichloride refining degasification
Until being escaped without gas, remove slag after 5 ~ 10 min of standing insulation and pour into be preheated in 300 ± 10 DEG C of metal die and cast
Ingot；Obtain a kind of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings.
The high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of the Zr and Sr combined microalloyings of the present embodiment is through light
Spectrum reality measures composition：8.18 %Si, 0.184%Zr, 0.023 %Sr, 0.133 %Fe, surplus is aluminium and impurity member
Element.
The high tough corrosion-resistant hypoeutectic Al-Si systems Cast aluminium alloy payment organization of the Zr and Sr combined microalloyings of the present embodiment
Densification, Si compare small, and size is in granular form or corynebacterium in submicron order, shape, and draw ratio is less than or equal to 2；Room temperature without
Notch impact toughness is 39.1 J/cm2（By GB/T 229-2007 metal material Charpy pendulum impact test methods）, impact tough
Property fracture surface of sample be in dimple feature typical ductile rupture；Tensile strength is 173.88MPa, elongation percentage 14.941%（By GB/
T228-2002 metal material tensile testing at ambient temperature）, tensile sample fracture is in the typical ductile rupture of dimple feature；Hardness
For 63.3HV, electrical conductivity 43.44%IACS（With reference to GB/T12966-2008 aluminium alloy electric conductance Eddy current test methods）；
The uniform corrosion rate after 93 h is soaked in the 3.5% NaCl aqueous solution at a temperature of 37 DEG C（Tested by GB 1024-88 metal materials
Room homogeneous corrosion total immersion test method）It is smaller for 0.0738 10248mm/a, corrosion surface Si phase sizes.
Example IV.
A kind of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings, its preparation side
Method：
Furnace temperature is first risen to 850 ± 10 DEG C, adds 75.220 grams of Al-Si intermediate alloys and 20.102 grams of pure Al of A00 grades, is treated complete
4.477 grams of Al-Zr intermediate alloys, 0.201 gram of Al-Sr intermediate alloy are sequentially added after portion's fusing；Treat all intermediate alloys and gold
After category fusing, 750 ± 10 DEG C are adjusted the temperature to, addition carbon trichloride refining degasification escapes up to without gas, standing insulation 5 ~
Remove slag and pour into after 10 min and be preheated in 300 ± 10 DEG C of metal die ingot of casting；It is compound micro- to obtain a kind of Zr and Sr
The high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of alloying.
The high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of the Zr and Sr combined microalloyings of the present embodiment is through light
Spectrum reality measures composition：7.68 %Si, 0.184 %Zr, 0.0199 %Sr, 0.133 %Fe, surplus are aluminium and impurity
Element.
The high tough corrosion-resistant hypoeutectic Al-Si systems Cast aluminium alloy payment organization of the Zr and Sr combined microalloyings of the present embodiment
Densification, 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 without
Notch impact toughness, impact toughness sample fracture are in the typical ductile rupture feature of dimple feature；Tensile sample fracture is in dimple
The typical ductile rupture feature of feature；Tensile strength, elongation percentage, hardness, electrical conductivity, 37 DEG C of temperature in the 3.5% NaCl aqueous solution
The parameters such as the uniform corrosion rate after 93 h of the lower immersion of degree are close with embodiment one to three.
Embodiment five.
A kind of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings, its preparation side
Method：
Furnace temperature is first risen to 850 ± 10 DEG C, adds 80.118 grams of Al-Si intermediate alloys and 15.002 grams of pure Al of A00 grades, is treated complete
4.647 grams of Al-Zr intermediate alloys, 0.233 gram of Al-Sr intermediate alloy are sequentially added after portion's fusing；Treat all intermediate alloys and gold
After category fusing, 750 ± 10 DEG C are adjusted the temperature to, addition carbon trichloride refining degasification escapes up to without gas, standing insulation 5 ~
Remove slag and pour into after 10 min and be preheated in 300 ± 10 DEG C of metal die ingot of casting；It is compound micro- to obtain a kind of Zr and Sr
The high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of alloying.
The high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of the Zr and Sr combined microalloyings of the present embodiment is through light
Spectrum reality measures composition：8.18 %Si, 0.191 %Zr, 0.023 %Sr, 0.149 %Fe, surplus are aluminium and impurity member
Element.
The high tough corrosion-resistant hypoeutectic Al-Si systems Cast aluminium alloy payment organization of the Zr and Sr combined microalloyings of the present embodiment
Densification, 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 without
Notch impact toughness, impact toughness sample fracture are in the typical ductile rupture feature of dimple feature；Tensile sample fracture is in dimple
The typical ductile rupture feature of feature；Tensile strength, elongation percentage, hardness, electrical conductivity, 37 DEG C of temperature in the 3.5% NaCl aqueous solution
The parameters such as the uniform corrosion rate after 93 h of the lower immersion of degree are close with embodiment one to three.
Embodiment six.
A kind of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings, its preparation side
Method：
Furnace temperature is first risen to 850 ± 10 DEG C, adds 77.375 grams of Al-Si intermediate alloys and 17.839 grams of pure Al of A00 grades, is treated complete
4.574 grams of Al-Zr intermediate alloys, 0.212 gram of Al-Sr intermediate alloy are sequentially added after portion's fusing；Treat all intermediate alloys and gold
After category fusing, 750 ± 10 DEG C are adjusted the temperature to, addition carbon trichloride refining degasification escapes up to without gas, standing insulation 5 ~
Remove slag and pour into after 10 min and be preheated in 300 ± 10 DEG C of metal die ingot of casting；It is compound micro- to obtain a kind of Zr and Sr
The high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of alloying.
The high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of the Zr and Sr combined microalloyings of the present embodiment is through light
Spectrum reality measures composition：7.9 %Si, 0.188 %Zr, 0.021 %Sr, 0.140 %Fe, surplus are aluminium and impurity member
Element.
The high tough corrosion-resistant hypoeutectic Al-Si systems Cast aluminium alloy payment organization of the Zr and Sr combined microalloyings of the present embodiment
Densification, 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 without
Notch impact toughness, impact toughness sample fracture are in the typical ductile rupture feature of dimple feature；Tensile sample fracture is in dimple
The typical ductile rupture feature of feature；Tensile strength, elongation percentage, hardness, electrical conductivity, 37 DEG C of temperature in the 3.5% NaCl aqueous solution
The parameters such as the uniform corrosion rate after 93 h of the lower immersion of degree are close with embodiment one to three.
Only list above the aluminium alloy of several common proportionings with when manufacture method, those skilled in the art can be with
Suitably adjusted according to examples detailed above the proportioning of each component and strictly by above-mentioned steps carry out manufacture can obtain preferable Zr and
The high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Sr combined microalloyings.
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. a kind of high tough corrosion-resistant hypoeutectic Al-Si systems cast aluminium alloy gold of Zr and Sr combined microalloyings and its preparation side
Method, it is characterised in that：It is mainly by aluminium（Al）, silicon（Si）, zirconium（Zr）And strontium（Sr）Composition, wherein, silicon（Si）Quality percentage
Than for 7.68 ~ 8.18%, zirconium（Zr）Mass percent be 0.184 ~ 0.191%, strontium（Sr）Mass percent for 0.0199 ~
0.023%, 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 hypoeutectic Al-Si systems casting aluminium of the Zr and Sr combined microalloyings described in claim 1
The preparation method of alloy, it is characterized in that its preparation process includes successively：
（1）First, furnace temperature is risen to 850 ± 10 DEG C, adds pure Al and Al-Si intermediate alloys, sequentially added after all melting
Al-Zr intermediate alloys, 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 high tough corrosion-resistant hypoeutectic Al-Si cast aluminium alloy golds.
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 Zr in 10.21%, Al-Zr intermediate alloys is Sr in 4.11%, Al-Sr intermediate alloys
For 9.89%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109402430A (en) * | 2018-12-12 | 2019-03-01 | 苏州大学 | A method of preparing hypoeutectic al-si alloy material |
| CN110607471A (en) * | 2019-08-27 | 2019-12-24 | 江苏大学 | Sr, Zr and Ti ternary composite microalloyed Al-Si-Cu series cast aluminum alloy and preparation method thereof |
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| CN101798649A (en) * | 2010-03-29 | 2010-08-11 | 江苏大学 | Compound 6013-type aluminum alloy microalloyed by zirconium and strontium and preparation method thereof |
| CN101838760A (en) * | 2010-03-29 | 2010-09-22 | 江苏大学 | Scandium, zirconium and strontium compound microalloyed 6013 type aluminium alloy and preparation method thereof |
| CN106947892A (en) * | 2017-05-12 | 2017-07-14 | 南通江中光电有限公司 | A kind of high tough anticorrosion aluminium material and preparation method thereof |
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| CN101798649A (en) * | 2010-03-29 | 2010-08-11 | 江苏大学 | Compound 6013-type aluminum alloy microalloyed by zirconium and strontium and preparation method thereof |
| CN101838760A (en) * | 2010-03-29 | 2010-09-22 | 江苏大学 | Scandium, zirconium and strontium compound microalloyed 6013 type aluminium alloy and preparation method thereof |
| CN106947892A (en) * | 2017-05-12 | 2017-07-14 | 南通江中光电有限公司 | A kind of high tough anticorrosion aluminium material and preparation method thereof |
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| CN109402430A (en) * | 2018-12-12 | 2019-03-01 | 苏州大学 | A method of preparing hypoeutectic al-si alloy material |
| CN110607471A (en) * | 2019-08-27 | 2019-12-24 | 江苏大学 | Sr, Zr and Ti ternary composite microalloyed Al-Si-Cu series cast aluminum alloy and preparation method thereof |
| CN110607471B (en) * | 2019-08-27 | 2021-07-20 | 江苏大学 | Sr, Zr and Ti ternary composite microalloyed Al-Si-Cu series cast aluminum alloy and preparation method thereof |
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