CN107236879A - Zirconium is strontium compound microalloyed and the magnesium alloy chemical Al-Si-Cu-based cast aluminium alloy gold of high-hardness corrosion-resistant and preparation method - Google Patents

Zirconium is strontium compound microalloyed and the magnesium alloy chemical Al-Si-Cu-based cast aluminium alloy gold of high-hardness corrosion-resistant and preparation method Download PDF

Info

Publication number
CN107236879A
CN107236879A CN201710640233.1A CN201710640233A CN107236879A CN 107236879 A CN107236879 A CN 107236879A CN 201710640233 A CN201710640233 A CN 201710640233A CN 107236879 A CN107236879 A CN 107236879A
Authority
CN
China
Prior art keywords
aluminium alloy
resistant
intermediate alloys
mass percent
corrosion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710640233.1A
Other languages
Chinese (zh)
Inventor
许晓静
张进松
王天伦
黄鹏
张冲
杜东辉
贾伟杰
陈汉辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu University
Original Assignee
Jiangsu University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu University filed Critical Jiangsu University
Priority to CN201710640233.1A priority Critical patent/CN107236879A/en
Publication of CN107236879A publication Critical patent/CN107236879A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/026Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/03Making alloys by melting using master alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/003Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/02Alloys based on aluminium with silicon as the next major constituent

Abstract

The high-hardness corrosion-resistant Al Si Cu cast aluminium alloy golds of a kind of Zr, Sr combined microalloying and Mg alloyings, it is characterized in that described aluminium alloy is main by aluminium(Al), silicon(Si), copper(Cu), magnesium(Mg), zirconium(Zr)And strontium(Sr), iron(Fe)Composition.Described preparation method includes successively:(1)850 DEG C are warming up to after pure Al and Al Si intermediate alloys are melted, Al Cu, Al Zr and Al Sr intermediate alloys is then sequentially added;(2)After after all intermediate alloys and metal molten, adjusting the temperature to 750 DEG C, pure Mg is added, degasification is refined up to without gas effusion, standing and being removed slag and ingot of casting after being incubated 5~10 min after after its fusing, adding carbon trichloride.Aluminium alloy as-cast structure of the present invention is fine and close, and room temperature non-notch impact flexibility average value is 16.35J/cm2, tensile strength is that 262.132MPa, elongation percentage are 5.645%, while uniform corrosion rate it soaks 93h in the 3.5%NaCl aqueous solution at a temperature of 37 DEG C when is 0.321081508mm/y.

Description

Zirconium is strontium compound microalloyed and the magnesium alloy chemical Al-Si-Cu-based casting of high-hardness corrosion-resistant Aluminium alloy and preparation method
Technical field
The present invention relates to a kind of aluminum alloy materials, especially a kind of new high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy The high-hardness corrosion-resistant Al-Si- of gold and preparation method thereof, specifically a kind of Zr, Sr combined microalloying and Mg alloyings Cu systems cast aluminium alloy gold and preparation method thereof.
Background technology
Al-Si(-Cu)It is that cast aluminium alloy gold is currently to apply most cast aluminium alloy materials, this kind of alloy in the industry Numbering have:Such as domestic YL102(AlSi12)、YL112(AlSi8.5Cu3.5)、YL113(AlSi811Cu3), it is Japanese ADC12(AlSi11Cu3)、ADC10(AlSi8.5Cu3.5)And the A380 in the U.S.(AlSi8.5Cu3.5)Deng these alloys tool There are excellent casting character, higher intensity and good corrosion resistance, but its plasticity, toughness are relatively low, limit It is applied.
It is well known that Al-Si(-Cu)It is the mechanical property and its second phase in organizing of cast aluminium alloy gold (Si is equal) Form, size, distribution are closely related.Refinement Si phases are to reduce Si to isolate to improve Al-Si with respect to matrix Al(-Cu)System's casting Make the effective way of aluminium alloy capability.Strontium(Sr)Element is a kind of effectively long-acting alterant in aluminium alloy, not only can be with Effectively refinement Al-Si(-Cu)Be the Si phases in cast aluminium alloy gold, and can be effectively in refining alloy FeSiAl5Deng chemical combination Thing phase.Zirconium(Zr)It is a kind of and the strong element of Al affinity, is added in aluminium alloy, the zirconium in alloy graining process(Zr)Element With Al formation A13Heterogeneous Nucleation effect is played in the high-melting-point thing phase such as Zr, the follow-up solidification to alloy, not only refining alloy as cast condition Matrix, promotes tiny equiax crystal to be formed, and improves the mobility and Elemental redistribution uniformity of liquid alloy.Therefore, Zr, Sr combined microalloyings and Mg alloyings can greatly improve conjunction while the performances such as alloy casting character, intensity are not reduced The plasticity and toughness of gold.
Up to the present, not yet there are a kind of Zr, Sr combined microalloying and Mg alloys with independent intellectual property right in China The high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of change and preparation method thereof is available, and this constrains me to a certain extent The manufacturing development of state's high performance casting alloy product.
The content of the invention
The purpose of the present invention is directed to current Al-Si(-Cu)It is cast aluminium alloy gold hardness, the problem of corrosion resistance is relatively low, hair Bright one kind is on the basis of Al-Si-Cu systems cast aluminium alloy gold composition design, by adjusting Si, Cu constituent content, while addition is micro- Measure zirconium(Zr), strontium(Sr)Element and a small amount of magnesium(Mg)Element carries out composite alloying, is not reducing alloy casting character(Flowing Property)While, Si phases and compound phase in efficient refining alloy greatly improve hardness, the corrosion resistance of alloy, obtain a kind of Excellent casting character and the Al-Si-Cu systems cast aluminium alloy gold of high-hardness corrosion-resistant are had concurrently, while providing its preparation method.
One of technical scheme is:
The high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of a kind of Zr, Sr combined microalloying and Mg alloyings, its feature It is:It is main by aluminium(Al), silicon(Si), copper(Cu), magnesium(Mg), zirconium(Zr)And strontium(Sr)Composition, wherein, silicon(Si)Quality Percentage is 7.88~8.02%, copper(Cu)Mass percent be 2.04~2.08%, magnesium(Mg)Mass percent be 0.406 ~0.421%, zirconium(Zr)Mass percent be 0.179~0.182%, strontium(Sr)Mass percent for 0.0066~ 0.0069%, surplus is aluminium and a small amount of impurity element(Such as iron, mass percent is 0.145~0.149%), the quality hundred of each component It is 100% to divide than sum.
The two of technical scheme are:
A kind of preparation side of the high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of Zr, Sr combined microalloying and Mg alloyings 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 in the middle of Al-Cu Alloy, Al-Zr intermediate alloys, Al-Sr intermediate alloys;
(2)Secondly, after after all intermediate alloys and metal molten, adjusting the temperature to 750 ± 10 DEG C, pure Mg is added, treats that it melts Afterwards, carbon trichloride refining degasification is added to be preheated to up to without gas effusion, standing to remove slag and pour into after 5~10 min of insulation Cast in 300 ± 10 DEG C of metal die ingot, that is, the high rigidity for obtaining a kind of Zr, Sr combined microalloying and Mg alloyings is resistance to Corrode Al-Si-Cu systems cast aluminium alloy gold.
The quality hundred that Si mass percent is Cu in 10.21%, 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 16.35J/cm2 present invention obtains a kind of room temperature non-notch impact flexibility average value(By GB/T 229-2007 Metal material Charpy pendulum impact test method);Tensile strength is that 262.132 MPa, elongation percentage are 5.645 %;Hardness is 93.65 HV, electrical conductivity are 36.9528%;Homogeneous corrosion when soaking 93 h at a temperature of 37 DEG C in the 3.5% NaCl aqueous solution Speed(By GB 1024-88 Uniform Corrosion Method of Laboratory Immersion Test methods)It is hard for 0.321081508 mm/y height Spend corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold.
(2)The present invention is contained on the basis of Al-Si-Cu systems cast aluminium alloy gold composition design by adjusting Si, Cu element Amount, while adding trace zirconium(Zr), strontium(Sr)Element and a small amount of magnesium(Mg)Element carries out composite alloying, is not reducing alloy casting While making the densification of performance guarantee alloy structure, Si phases and the compound phase in alloy are efficiently refined, alloy greatly improved Hardness, corrosion resistance, such as high-hardness corrosion-resistant Al-Si-Cu of Zr, Sr combined microalloying of the present invention and Mg alloyings casts Aluminium alloy(By taking embodiment one as an example), its hardness is than without Zr, Sr combined microalloying and the Al-Si-Cu of Mg alloyings castings Aluminium alloy(By taking comparative example one as an example)Hardness improve 24.74 %, average homogeneous corrosion rate improves 8.23%.
(3)Si phase sizes are in 1~2 μm of level in Al-Si-Cu systems of the present invention cast aluminium alloy gold, and shape is in granular form or stub Shape, and draw ratio is less than or equal to 2.
(4)The high rigidity corrosion resistant of the typical ductile rupture of dimple feature is all presented present invention obtains impact and stretching fracture Lose Al-Si-Cu systems cast aluminium alloy gold.
(5)The invention discloses a kind of composition of high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold and preparation method, The external technology blockage to high performance casting aluminium alloy is broken to a certain extent, Chinese large-sized complex thin-wall high rigidity can be met The manufacture demand of corrosion-resisting aluminum casting alloy product.
(6)The present invention obtains preferable preparation method by substantial amounts of experiment, 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 Zr, Sr combined microalloying of the embodiment of the present invention one and the high-hardness corrosion-resistant Al-Si- of Mg alloyings The metallographic structure optical microscope photograph of Cu systems cast aluminium alloy gold.
Fig. 2 is Zr, Sr combined microalloying of the embodiment of the present invention one and the high-hardness corrosion-resistant Al-Si- of Mg alloyings The metallographic structure electron scanning micrograph of Cu systems cast aluminium alloy gold.
Fig. 3 is Zr, Sr combined microalloying of the embodiment of the present invention one and the high-hardness corrosion-resistant Al-Si- of Mg alloyings The impact toughness sample Fracture scan electron micrograph of Cu systems cast aluminium alloy gold.
Fig. 4 is Zr, Sr combined microalloying of the embodiment of the present invention one and the high-hardness corrosion-resistant Al-Si- of Mg alloyings The tensile sample Fracture scan electron micrograph of Cu systems cast aluminium alloy gold.
Fig. 5 is Zr, Sr combined microalloying of the embodiment of the present invention one and the high-hardness corrosion-resistant Al-Si- of Mg alloyings The corrosion sample metallographic surface Scanning Electron microphotograph of Cu systems cast aluminium alloy gold.
Fig. 6 is the gold of the Al-Si-Cu systems cast aluminium alloy gold without Zr, Sr combined microalloying of comparative example one of the present invention Phase constitution optical microscope photograph.
Fig. 7 is the metallographic group of the Al-Si-Cu systems cast aluminium alloy gold without Zr, Sr combined microalloying of this comparative example one Knit electron scanning micrograph.
Fig. 8 is the casting of the Al-Si-Cu systems without Zr, Sr combined microalloying and Mg alloyings of comparative example one of the present invention The impact toughness sample Fracture scan electron micrograph of aluminium alloy.
Fig. 9 is the casting of the Al-Si-Cu systems without Zr, Sr combined microalloying and Mg alloyings of comparative example one of the present invention The tensile sample Fracture scan electron micrograph of aluminium alloy.
Figure 10 is the casting of the Al-Si-Cu systems without Zr, Sr combined microalloying and Mg alloyings of comparative example one of the present invention The corrosion 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-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of Zr, Sr combined microalloying and Mg alloyings, its Preparation method:
First by the pure Al of A00 grades(99.79%Al, 0.14%Fe, 0.04%Si)With Al-Si (89.62 %Al, 10.21%Si, 0.17% Fe, all components of the invention are represented using mass percent, those skilled in the art can by conventional algorithm by its Weight or quality are converted into, similarly hereinafter, it is impurity that all components, which is added the part less than 100%) it is warming up to after intermediate alloy fusing 850 ± 10 DEG C, then sequentially add Al-Cu (49.62%Al, 50.12%Cu, 0.15%Fe, 0.11%Si) intermediate alloy, 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 after all intermediate alloys and metal molten, adjusting the temperature to 750 ± 10 DEG C, plus Enter pure Mg, after after its fusing, adding carbon trichloride refining degasification up to no gas effusion, gone after standing 5~10 min of insulation Slag simultaneously pours into and is preheated in 300 ± 10 DEG C of metal die ingot of casting;Obtain a kind of Zr, Sr combined microalloying and Mg is closed The high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of aurification.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings It is golden to be through the actual measurement composition of spectrum:7.95%Si, 2.06 %Cu, 0. 415%Mg, 0.181 %Zr, 0.0067 %Sr, 0.147 %Fe, surplus is aluminium and impurity member, and Fe therein is formed by the trace element in fine aluminium and intermediate alloy.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings Payment organization is fine and close(Fig. 1), Si phases are tiny, and size is in granular form or corynebacterium in 1~2 μm of level, shape, and draw ratio is less than etc. In 2(Fig. 1, Fig. 2);Room temperature non-notch impact flexibility average value is 16.35 J/cm2(By the GB/T 229-2007 metal material summers Than pendulum impact test method), impact toughness sample fracture is in the typical ductile rupture of dimple feature(Fig. 3);Tensile strength is 262.132 MPa, elongation percentage are 5.645 %, and tensile sample fracture is in the typical ductile rupture of dimple feature(Fig. 4);Hardness is 93.65 HV, electrical conductivity are 36.9528%;Homogeneous corrosion when soaking 93 h at a temperature of 37 DEG C in the 3.5% NaCl aqueous solution Speed(By GB 1024-88 Uniform Corrosion Method of Laboratory Immersion Test methods)For 0.321081508mm/y, corrode table Face Si phase sizes are tiny(Fig. 5).
Embodiment two.
A kind of high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of Zr, Sr combined microalloying and Mg alloyings, its Preparation method:
First by the pure Al of A00 grades(99.79%Al, 0.14%Fe, 0.04%Si)With Al-Si (89.62 %Al, 10.21%Si, 0.17% Fe, all components of the invention represent that similarly hereinafter, the part that all components are added less than 100% is using mass percent Impurity) intermediate alloy fusing after be warming up to 850 ± 10 DEG C, then sequentially add Al-Cu (49.62%Al, 50.12%Cu, 0.15% Fe, 0.11%Si) intermediate alloy, 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 after all intermediate alloys and metal molten, adjust Temperature is saved to 750 ± 10 DEG C, pure Mg is added, after it melts, carbon trichloride refining degasification is added until being escaped without gas, it is quiet Put to remove slag and pour into after the min of insulation 5~10 and be preheated in 300 ± 10 DEG C of metal die ingot of casting;Obtain a kind of Zr, The high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of Sr combined microalloyings and Mg alloyings.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings It is golden to be through the actual measurement composition of spectrum:8.02%Si, 2.04 %Cu, 0. 421%Mg, 0.18%Zr, 0.0066%Sr, 0.145%Fe, surplus is aluminium and impurity element, and Fe therein is formed by the trace element in fine aluminium and intermediate alloy.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings Payment organization is fine and close, and Si phases are tiny, and size is in granular form or corynebacterium in 1~2 μm of level, shape, and draw ratio is less than or equal to 2; Room temperature non-notch impact flexibility average value is 15.2J/cm2(By GB/T 229-2007 metal material Charpy pendulum impact tests Method), impact toughness sample fracture is in the typical ductile rupture of dimple feature;Tensile strength is that 257.215MPa, elongation percentage are 5.35%, tensile sample fracture is in the typical ductile rupture of dimple feature;Hardness is that 91.6 HV, electrical conductivity are 37.022%; Uniform corrosion rate when soaking 93 h at a temperature of 37 DEG C in the 3.5% NaCl aqueous solution(It is real by GB 1024-88 metal materials Test room homogeneous corrosion total immersion test method)0.310289328 is mm/y, and corrosion surface Si phase sizes are tiny.
Embodiment three.
A kind of high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of Zr, Sr combined microalloying and Mg alloyings, its Preparation method:
First by the pure Al of A00 grades(99.79%Al, 0.14%Fe, 0.04%Si)With Al-Si (89.62 %Al, 10.21%Si, 0.17% Fe, all components of the invention represent that similarly hereinafter, the part that all components are added less than 100% is using mass percent Impurity) intermediate alloy fusing after be warming up to 850 ± 10 DEG C, then sequentially add Al-Cu (49.62%Al, 50.12%Cu, 0.15% Fe, 0.11%Si) intermediate alloy, 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 after all intermediate alloys and metal molten, adjust Temperature is saved to 750 ± 10 DEG C, pure Mg is added, after it melts, carbon trichloride refining degasification is added until being escaped without gas, it is quiet Put to remove slag and pour into after the min of insulation 5~10 and be preheated in 300 ± 10 DEG C of metal die ingot of casting;Obtain a kind of Zr, The high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of Sr combined microalloyings and Mg alloyings.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings It is golden to be through the actual measurement composition of spectrum:7.94%Si, 2.08 %Cu, 0. 414%Mg, 0.179%Zr, 0.0066Sr, 0.148%Fe, surplus is aluminium and impurity element, and Fe therein is formed by the trace element in fine aluminium and intermediate alloy.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings Payment organization is fine and close, and Si phases are tiny, and size is in granular form or corynebacterium in 1~2 μm of level, shape, and draw ratio is less than or equal to 2; Room temperature non-notch impact flexibility average value is 17.5J/cm2(By GB/T 229-2007 metal material Charpy pendulum impact tests Method), impact toughness sample fracture is in the typical ductile rupture of dimple feature;Tensile strength is that 267.049MPa, elongation percentage are 5.94%, tensile sample fracture is in the typical ductile rupture of dimple feature;Hardness is that 94.5HV, electrical conductivity are 36.676%; Uniform corrosion rate during 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)0.331873688 is mm/y, and corrosion surface Si phase sizes are tiny.
Example IV(In mass).
A kind of high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of Zr, Sr combined microalloying and Mg alloyings, its Preparation method:
First 850 ± 10 DEG C will be warming up to after the pure Al and 77.179 gram of Al-Si intermediate alloy fusing of 13.812 grams of A00 grades, then Sequentially add 4.110 grams of Al-Cu intermediate alloys, 4.428 grams of Al-Zr intermediate alloys, 0.0698 gram of Al-Sr intermediate alloy;Treat institute Have after intermediate alloy and metal molten, adjust the temperature to 750 ± 10 DEG C, add 0.406 gram of pure Mg, after after its fusing, add six Chloroethanes refining degasification without gas until escape, and removing slag and pour into after 5~10 min of standing insulation is preheated to 300 ± 10 DEG C Cast in metal die ingot;Obtain a kind of Zr, Sr combined microalloying and the high-hardness corrosion-resistant Al-Si- of Mg alloyings Cu systems cast aluminium alloy gold.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings It is golden to be through the actual measurement composition of spectrum:7.88%Si, 2.06 %Cu, 0.406%Mg, 0.182 %Zr, 0.0069 %Sr, 0.149 %Fe, surplus is aluminium and impurity member.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings Payment organization is fine and close, and Si phases are tiny, and size is in granular form or corynebacterium in 1~2 μm of level, shape, and draw ratio is less than or equal to 2; Room temperature non-notch impact flexibility average value is 17.1J/cm2(By GB/T 229-2007 metal material Charpy pendulum impact tests Method), impact toughness sample fracture is in the typical ductile rupture of dimple feature;Tensile strength is that 264.126MPa, elongation percentage are 5.82%, tensile sample fracture is in the typical ductile rupture of dimple feature;Hardness is that 93.6HV, electrical conductivity are 37.863%; Uniform corrosion rate during 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)0.328675385 is mm/y, and corrosion surface Si phase sizes are tiny.
Embodiment five(In mass).
A kind of high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of Zr, Sr combined microalloying and Mg alloyings, its Preparation method:
First 850 ± 10 DEG C will be warming up to after the pure Al and 78.355 gram of Al-Si intermediate alloy fusing of 12.657 grams of A00 grades, then Sequentially add 4.150 grams of Al-Cu intermediate alloys, 4.355 grams of Al-Zr intermediate alloys, 0.0667 gram of Al-Sr intermediate alloy;Treat institute Have after intermediate alloy and metal molten, adjust the temperature to 750 ± 10 DEG C, add 0.416 gram of pure Mg, after after its fusing, add six Chloroethanes refining degasification without gas until escape, and removing slag and pour into after 5~10 min of standing insulation is preheated to 300 ± 10 DEG C Cast in metal die ingot;Obtain a kind of Zr, Sr combined microalloying and the high-hardness corrosion-resistant Al-Si- of Mg alloyings Cu systems cast aluminium alloy gold.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings It is golden to be through the actual measurement composition of spectrum:8.00%Si, 2.08 %Cu, 0.416%Mg, 0.179 %Zr, 0.0066 %Sr, 0.147 %Fe, surplus is aluminium and impurity member.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings Payment organization is fine and close, and Si phases are tiny, and size is in granular form or corynebacterium in 1~2 μm of level, shape, and draw ratio is less than or equal to 2; Room temperature non-notch impact flexibility average value is 16.8J/cm2(By GB/T 229-2007 metal material Charpy pendulum impact tests Method), impact toughness sample fracture is in the typical ductile rupture of dimple feature;Tensile strength is that 260.869MPa, elongation percentage are 5.75%, tensile sample fracture is in the typical ductile rupture of dimple feature;Hardness is that 93.8HV, electrical conductivity are 38.742%; Uniform corrosion rate during 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)0.330985142 is mm/y, and corrosion surface Si phase sizes are tiny.
Embodiment six(In mass).
A kind of high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of Zr, Sr combined microalloying and Mg alloyings, its Preparation method:
First 850 ± 10 DEG C will be warming up to after the pure Al and 78.550 gram of Al-Si intermediate alloy fusing of 12.251 grams of A00 grades, then Sequentially add 4.070 grams of Al-Cu intermediate alloys, 4.380 grams of Al-Zr intermediate alloys, 0.0688 gram of Al-Sr intermediate alloy;Treat institute Have after intermediate alloy and metal molten, adjust the temperature to 750 ± 10 DEG C, add 0.421 gram of pure Mg, after after its fusing, add six Chloroethanes refining degasification without gas until escape, and removing slag and pour into after 5~10 min of standing insulation is preheated to 300 ± 10 DEG C Cast in metal die ingot;Obtain a kind of Zr, Sr combined microalloying and the high-hardness corrosion-resistant Al-Si- of Mg alloyings Cu systems cast aluminium alloy gold.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings It is golden to be through the actual measurement composition of spectrum:8.02%Si, 2.04 %Cu, 0.421%Mg, 0.180 %Zr, 0.0068 %Sr, 0.149 %Fe, surplus is aluminium and impurity member.
Zr, Sr combined microalloying of the present embodiment and the high-hardness corrosion-resistant Al-Si-Cu systems Cast aluminium alloy of Mg alloyings Payment organization is fine and close, and Si phases are tiny, and size is in granular form or corynebacterium in 1~2 μm of level, shape, and draw ratio is less than or equal to 2; Room temperature non-notch impact flexibility average value is 16.5J/cm2(By GB/T 229-2007 metal material Charpy pendulum impact tests Method), impact toughness sample fracture is in the typical ductile rupture of dimple feature;Tensile strength is that 266.258MPa, elongation percentage are 5.84%, tensile sample fracture is in the typical ductile rupture of dimple feature;Hardness is that 93.2HV, electrical conductivity are 36.982%; Uniform corrosion rate during 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)0.326856854 is mm/y, and corrosion surface Si phase sizes are tiny.
Comparative example one.
As shown in Fig. 6,7,8,9,10.
A kind of Al-Si-Cu systems cast aluminium alloy gold without Zr and Sr combined microalloyings and Mg alloyings, its preparation side Method:
First by the pure Al of A00 grades(99.79%Al, 0.14%Fe, 0.04%Si)With Al-Si (89.62 %Al, 10.21%Si, 0.17% Fe, all components of the invention represent that similarly hereinafter, the part that all components are added less than 100% is using mass percent Impurity) intermediate alloy fusing after be warming up to 850 ± 10 DEG C, then sequentially add Al-Cu (49.62%Al, 50.12%Cu, 0.15% Fe, 0.11%Si) intermediate alloy;After after all intermediate alloys and metal molten, adjusting the temperature to 750 ± 10 DEG C, chlordene is added Ethane refining degasification is preheated to 300 ± 10 DEG C of gold up to removing slag and pouring into after no gas effusion, 5~10 min of standing insulation Belong to ingot of being cast in mould;Obtain a kind of Al-Si-Cu systems cast aluminium alloy gold without Zr and Sr combined microalloyings.
The Al-Si-Cu systems cast aluminium alloy gold without Zr and Sr combined microalloyings of this comparative example is through the actual measurement of spectrum Composition is:8.5 %Si, 2.14 %Cu, 0.136 %Fe, surplus are aluminium and impurity element.
High-hardness corrosion-resistant Al-Si-Cu systems without Zr, Sr combined microalloying and Mg alloyings casting of this comparative example Aluminium alloy and preparation method thereof dense structure(Fig. 6), Si phases are larger, and size is in micron order, and shape is in strip, and draw ratio More than 2(Fig. 6, Fig. 7);Room temperature non-notch impact flexibility average value is 9.93J/cm2(By the GB/T 229-2007 metal material summers Than pendulum impact test method), impact toughness sample fracture is in the typical brittle fracture of Quasi cleavage feature(Fig. 8);Tensile strength It is 5.825% for 202.68 MPa, elongation percentage, tensile sample fracture is in the typical brittle fracture of Quasi cleavage feature(Fig. 9);Hardness For 75.075HV, electrical conductivity is 33.9224166609%;When soaking 93 h at a temperature of 37 DEG C in the 3.5% NaCl aqueous solution Uniform corrosion rate(By GB 1024-88 Uniform Corrosion Method of Laboratory Immersion Test methods)For 0.296661583 mm/ Y, corrosion surface Si phase sizes are thick(Figure 10).
Only list above several common proportionings aluminium alloy with when manufacture method, those skilled in the art can be with The proportioning of each component is suitably adjusted according to examples detailed above and strictly manufacture is carried out by above-mentioned steps can obtain preferable Zr, Sr The high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of combined microalloying and Mg alloyings.
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. the high-hardness corrosion-resistant Al-Si-Cu systems cast aluminium alloy gold of a kind of Zr, Sr combined microalloying and Mg alloyings, it is special Levy and be:It is main by aluminium(Al), silicon(Si), copper(Cu), magnesium(Mg), zirconium(Zr)And strontium(Sr)Composition, wherein, silicon(Si)Matter It is 7.88~8.02%, copper to measure percentage(Cu)Mass percent be 2.04~2.08%, magnesium(Mg)Mass percent be 0.406~0.421%, zirconium(Zr)Mass percent be 0.179~0.182%, strontium(Sr)Mass percent for 0.0066~ 0.0069%, surplus is aluminium and a small amount of impurity element, and the mass percent sum of each component is 100%.
2. the high-hardness corrosion-resistant Al-Si-Cu systems of Zr, Sr combined microalloying and Mg alloyings described in a kind of claim 1 The preparation method of cast aluminium alloy gold, 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 in the middle of Al-Cu Alloy, Al-Zr intermediate alloys, Al-Sr intermediate alloys;
(2)Secondly, after after all intermediate alloys and metal molten, adjusting the temperature to 750 ± 10 DEG C, pure Mg is added, treats that it melts Afterwards, carbon trichloride refining degasification is added to be preheated to up to without gas effusion, standing to remove slag and pour into after 5~10 min of insulation Cast in 300 ± 10 DEG C of metal die ingot, that is, the high rigidity for obtaining a kind of Zr, Sr combined microalloying and Mg alloyings is resistance to Corrode Al-Si-Cu systems cast aluminium alloy gold.
3. preparation method according to claim 2, it is characterized in that in described Al-Si intermediate alloys Si mass percent The mass percent for being Zr in 50.12%, Al-Zr intermediate alloys for the mass percent of Cu in 10.21%, Al-Cu intermediate alloys It is 9.89% for the mass percent of Sr in 4.11%, Al-Sr intermediate alloys.
CN201710640233.1A 2017-07-31 2017-07-31 Zirconium is strontium compound microalloyed and the magnesium alloy chemical Al-Si-Cu-based cast aluminium alloy gold of high-hardness corrosion-resistant and preparation method Pending CN107236879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710640233.1A CN107236879A (en) 2017-07-31 2017-07-31 Zirconium is strontium compound microalloyed and the magnesium alloy chemical Al-Si-Cu-based cast aluminium alloy gold of high-hardness corrosion-resistant and preparation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710640233.1A CN107236879A (en) 2017-07-31 2017-07-31 Zirconium is strontium compound microalloyed and the magnesium alloy chemical Al-Si-Cu-based cast aluminium alloy gold of high-hardness corrosion-resistant and preparation method

Publications (1)

Publication Number Publication Date
CN107236879A true CN107236879A (en) 2017-10-10

Family

ID=59989509

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710640233.1A Pending CN107236879A (en) 2017-07-31 2017-07-31 Zirconium is strontium compound microalloyed and the magnesium alloy chemical Al-Si-Cu-based cast aluminium alloy gold of high-hardness corrosion-resistant and preparation method

Country Status (1)

Country Link
CN (1) CN107236879A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN110629078A (en) * 2019-08-27 2019-12-31 江苏大学 Novel high-strength high-plasticity cast-forged composite aluminum alloy and member preparation method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1555423A (en) * 2001-07-25 2004-12-15 昭和电工株式会社 Aluminum alloy excellent in machinability, and aluminum alloy material and method for production 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
CN101838762A (en) * 2010-03-15 2010-09-22 江苏大学 High-hardness corrosion resistant 7000 series aluminum alloy and production 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
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1555423A (en) * 2001-07-25 2004-12-15 昭和电工株式会社 Aluminum alloy excellent in machinability, and aluminum alloy material and method for production thereof
CN101838762A (en) * 2010-03-15 2010-09-22 江苏大学 High-hardness corrosion resistant 7000 series aluminum alloy and production 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
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
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN110629078A (en) * 2019-08-27 2019-12-31 江苏大学 Novel high-strength high-plasticity cast-forged composite aluminum alloy and member preparation method
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

Similar Documents

Publication Publication Date Title
Basavakumar et al. Influence of grain refinement and modification on microstructure and mechanical properties of Al–7Si and Al–7Si–2.5 Cu cast alloys
WO2018205287A1 (en) High-strength and -toughness corrosion-resistant aluminum alloy material and method for fabricating same
CN104073699A (en) Al-Si-Cu-Mg cast aluminum alloy and preparation method thereof
WO2021098044A1 (en) High-performance aluminum alloy for semi-solid die casting, and preparation method thereof
CN107475586B (en) A kind of polynary made of Al-Cu alloy of high-strength and high ductility and its preparation method and application
CN105568083B (en) It is a kind of suitable for high tough aluminum alloy materials of semi-solid rheological die casting and preparation method thereof
Basavakumar et al. Impact toughness in Al–12Si and Al–12Si–3Cu cast alloys—Part 1: Effect of process variables and microstructure
CN107400809A (en) The zirconium strontium compound microalloyed Al-Si-Cu-based cast aluminium alloy gold of high tough corrosion-resistant low silicon content and preparation method
CN107338374A (en) The high tough Al Si Cu system's cast aluminium alloy golds and preparation method of Zr, Sr combined microalloying and Mn alloyings
CN110592445B (en) 720-doped 740MPa cold extrusion Al-Zn-Mg-Cu-Ti aluminum alloy and preparation method thereof
CN108103363A (en) It is a kind of for refinement-alterant of hypoeutectic silumin alloy and its preparation method and application
CN107354349A (en) A kind of tank body material is with high-performance containing nearly cocrystallized Al-Si alloys of Zn and preparation method thereof
CN108342613A (en) A kind of Environment-friendlycorrosion-resistant corrosion-resistant copper alloy and preparation method thereof
CN108193096A (en) A kind of hypoeutectic silumin alloy of high-strength and high ductility and preparation method thereof
CN107236879A (en) Zirconium is strontium compound microalloyed and the magnesium alloy chemical Al-Si-Cu-based cast aluminium alloy gold of high-hardness corrosion-resistant and preparation method
CN107937768A (en) A kind of extrusion casint aluminum alloy materials and preparation method thereof
Wang et al. High damping capacity of Al-40Zn alloys with fine grain and eutectoid structures via Yb alloying
CN108048710A (en) A kind of high tough aluminium alloy of extrusion casint and its extrusion casting method
CN107447137A (en) The high tough corrosion-resistant Al Si Cu cast aluminium alloy golds and preparation method of a kind of Zr and Sr combined microalloyings
CN107385289A (en) 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
CN105063393B (en) A kind of Mg2The method of Si/Al based composites and its composite optimization
CN109457153A (en) A kind of high Zn pack alloy and preparation method thereof
CN102418009B (en) Aluminum alloy capable of digesting high-hardness compounds and smelting method of aluminum alloy
CN109182804A (en) A kind of high intensity aluminum bronze line aluminium alloy preparation method
CN110607471B (en) Sr, Zr and Ti ternary composite microalloyed Al-Si-Cu series cast aluminum alloy and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20171010