CN116516223A - Erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy and preparation method thereof - Google Patents
Erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy and preparation method thereof Download PDFInfo
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- CN116516223A CN116516223A CN202310348391.5A CN202310348391A CN116516223A CN 116516223 A CN116516223 A CN 116516223A CN 202310348391 A CN202310348391 A CN 202310348391A CN 116516223 A CN116516223 A CN 116516223A
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- 239000011701 zinc Substances 0.000 title claims abstract description 55
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 49
- 229910052691 Erbium Inorganic materials 0.000 title claims abstract description 38
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910001093 Zr alloy Inorganic materials 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 60
- 239000000956 alloy Substances 0.000 claims abstract description 60
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims abstract description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000010791 quenching Methods 0.000 claims abstract description 4
- 230000000171 quenching effect Effects 0.000 claims abstract description 4
- 239000002893 slag Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- -1 aluminum erbium Chemical compound 0.000 claims description 24
- 239000002994 raw material Substances 0.000 claims description 20
- 239000010949 copper Substances 0.000 claims description 11
- 239000012535 impurity Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 7
- ZGUQGPFMMTZGBQ-UHFFFAOYSA-N [Al].[Al].[Zr] Chemical compound [Al].[Al].[Zr] ZGUQGPFMMTZGBQ-UHFFFAOYSA-N 0.000 claims description 6
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 claims description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 5
- 229910000676 Si alloy Inorganic materials 0.000 claims description 4
- 238000000265 homogenisation Methods 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 229910001371 Er alloy Inorganic materials 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 150000002739 metals Chemical class 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 2
- 238000004321 preservation Methods 0.000 abstract 2
- 230000003679 aging effect Effects 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 8
- 229910017758 Cu-Si Inorganic materials 0.000 description 6
- 229910017931 Cu—Si Inorganic materials 0.000 description 6
- 229910018137 Al-Zn Inorganic materials 0.000 description 3
- 229910018573 Al—Zn Inorganic materials 0.000 description 3
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/005—Removing slag from a molten metal surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/053—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
Abstract
An erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy and a preparation method thereof relate to the technical field of nonferrous metals, and the alloy contents are respectively as follows: 25 to 35 percent of Zn, 2.5 to 3.5 percent of Cu, 2.0 to 3.0 percent of Si, 0 to 0.1 percent of Er, 0 to 0.1 percent of Zr and the balance of Al. The smelting method comprises the following steps: placing pure aluminum and intermediate alloy into a smelting crucible, and heating to 720-780 ℃ to form an aluminum melt; putting pure zinc, stirring and melting, removing slag, and pouring into a mould prepared in advance. The aluminum alloy cast ingot is subjected to heat preservation for 12 hours at 440 ℃, is immediately subjected to water quenching, and is subjected to heat preservation for 1 hour at 120 ℃, wherein the yield strength is 400-410 MPa, and the tensile strength is 440-460 MPa. The high zinc aluminum alloy has aging property; high mechanical properties; the preparation method is simple and convenient to operate; the energy consumption is small, the cost is low, and the application prospect is good.
Description
Technical Field
The invention relates to the technical field of nonferrous metals, in particular to an erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy and a preparation method thereof.
Background
In recent years, research on Al-Zn alloys has been paid more attention, and among Al-Zn alloys, it is generally studied that Zn content is 10% or less, but Zn content is more than 10%, that is, aluminum-zinc alloys having Zn content of 20% to 45% have not been studied intensively. The high-zinc aluminum alloy has the advantages of low melting point, low manufacturing cost, easily available raw materials and the like, and is one of metal materials which are researched and developed by scientists in recent decades. Currently, many researches on high zinc aluminum alloys by scientists are based on aluminum zinc and aluminum zinc copper systems, and zinc can be mostly dissolved in solid solution aluminum. Studies have shown that aluminium and quantitative zinc are able to form a layered structure and improve the flowability of the alloy.
Cu, si, er, zr rare earth element is used as main alloy element in the high zinc aluminum alloy: the main strengthening elements in the high-zinc aluminum alloy play the roles of solid solution strengthening and heterogeneous nucleation during Cu, and Cu can form Al with Al 2 Cu phase to raise the strength of alloy; cu can change the mechanical properties of Al-Zn alloy, but can increase the dimensional instability of the alloy, and the problems can be solved by adding Si element, and the addition of Si reduces the tensile strength and ductility of the alloy, but improves the hardness and wear resistance of the alloy; rare earth elements Er and Zr are effective microalloying elements after the aluminum alloy relays Sc, and trace Er is added to refine alloy as-cast grains; the room temperature strength of pure aluminum can be greatly improved on the premise of keeping the elongation of the alloy basically unchanged. So far, few reports on Al-Zn-Cu-Si-Er-Zr alloys containing erbium and high zinc content are made.
The research shows that the high zinc aluminum alloy is mainly widely applied to parts such as bearings, structural parts, shock absorption and the like. Among them, the high zinc aluminum alloy is most used as a wear-resistant material, such as a bearing. The high zinc-aluminum alloy is not only not inferior to the conventional aluminum-silicon alloy in fluidity, but also superior to the conventional wear-resistant material in wear resistance, such as tin bronze alloy, spheroidal graphite cast iron and the like. Compared with the prior two, the high zinc aluminum alloy not only has the advantages, but also has the characteristics of high hardness, low cost, easy molding and the like, and can replace the traditional wear-resistant materials such as tin bronze alloy and the like.
The conventional casting method has some defects for preparing the high-zinc aluminum alloy, for example, the binary aluminum-zinc alloy without adding micro alloying elements is poor in mechanical property and dimensional stability, so that the alloy cannot be perfectly applied to the engineering field, and the application of the high-zinc aluminum alloy in the industrial engineering field is limited to a great extent.
Disclosure of Invention
The invention aims to provide a preparation method of an erbium-containing high-zinc aluminum alloy, which changes the components of the alloy by adding microalloying elements, improves the strength by utilizing Cu, improves the dimensional instability by utilizing Si, refines grains by Er and Zr, and improves the strength, the structure and the mechanical property of the zinc-aluminum alloy on the whole by heat treatment.
The high zinc Al-Zn-Cu-Si-Er-Zr alloy contains 25 to 35 mass percent of Zn, 2.5 to 3.5 mass percent of Cu, 2.0 to 3.0 mass percent of Si, 0 to 0.2 mass percent of Er, 0 to 0.2 mass percent of Zr, and the balance of Al and unavoidable impurity elements; the mass fraction of the impurities is less than or equal to 0.5 percent, and the mass fraction of the single element in the impurities is less than or equal to 0.1 percent. The yield strength of the alloy after heat treatment is more than 400MPa, and the tensile strength is more than 440MPa.
The mass fraction of impurities in the erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy is less than or equal to 0.3 percent, and the mass fraction of single elements in the impurities is less than or equal to 0.05 percent.
The microhardness of the as-cast high-zinc Al-Zn-Cu-Si-Er-Zr alloy is more than 150HV.
The preparation method of the erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy comprises the following steps:
(1) Preparing pure aluminum, pure zinc, aluminum copper, aluminum silicon, aluminum erbium, aluminum zirconium intermediate alloy as raw materials; wherein Zn accounts for 25-35% of the total mass of all raw materials, cu accounts for 2.5-3.5% of the total mass of all raw materials, si accounts for 2.0-3.0% of the total mass of all raw materials, er accounts for 0-0.2% of the total mass of all raw materials, zr accounts for 0-0.2% of the total mass of all raw materials, and the balance is Al;
(2) Placing pure aluminum and intermediate alloy into a crucible and heating to 760-780 ℃ to form aluminum copper silicon erbium zirconium melt;
(3) Putting pure zinc into the melt, and stirring until the pure zinc is completely melted to form an aluminum zinc copper silicon erbium zirconium melt;
(4) Carrying out slag skimming treatment on the aluminum zinc copper silicon erbium zirconium melt, uniformly stirring, and pouring the melt into a prepared mould; and cooling to obtain the high-zinc Al-Zn-Cu-Si-Er-Zr alloy cast ingot.
The alloy is subjected to heat treatment, and is characterized by comprising the following steps:
(5) Cutting the aluminum alloy cast ingot prepared in the step (4) into blocks such as samples with the thickness of 10mm multiplied by 5mm, heating along with a furnace, placing in an environment with the temperature of 440 ℃, preserving heat for 12 hours, and immediately performing water quenching to finish homogenization treatment;
(6) And (3) placing the homogenized aluminum alloy sample in the step (5) in an environment of 120 ℃, and preserving heat for 1h to obtain the aged erbium-containing high-zinc aluminum alloy.
In the step (1), the purity of pure aluminum and pure zinc is more than or equal to 99.98%, the copper content of aluminum-copper alloy is 60%, the silicon content of aluminum-silicon alloy is 20%, the erbium content of aluminum-erbium alloy is 6%, and the zirconium content of aluminum-zirconium alloy is 10%.
In the step (4), the skimming is to use a titanium alloy tool to skim the oxidized dross on the surface of the aluminum zinc copper silver melt.
In the step (4), the temperature of the aluminum zinc copper silicon erbium zirconium melt is 720-730 ℃ when the aluminum zinc copper silicon erbium zirconium melt is poured into a die.
In the method, the material of the die is cast iron.
In the step (4), the erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy is used as a block material, the thickness is 100-200 mm, and the width is 180mm.
Compared with the prior art, the invention benefits from:
1. the Cu element is added into the high-zinc aluminum alloy, so that the strength of the alloy can be enhanced; the Er and Zr elements are added into the high-zinc aluminum alloy to effectively refine grains, so that the structure and mechanical properties are better than those of the traditional high-zinc aluminum alloy; the addition of Si element to the high zinc aluminum alloy can improve dimensional instability.
2. The Al-Zn-Cu-Si high-zinc aluminum alloy can have higher strength, hardness and other mechanical properties through component regulation and control and heat treatment process adjustment, and the application prospect of casting the alloy is expanded.
3. The casting method of the high zinc-aluminum alloy is simple, has low energy consumption and low cost, is hopeful to realize casting and forging integrated molding by an extrusion casting technology, and has good application prospect.
Drawings
FIG. 1 is a metallographic view of an erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy according to example 1 of the present invention;
FIG. 2 is a photograph of an electron microscope after aging of the erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy according to example 1 of the present invention;
FIG. 3 is a graph of engineering stress versus engineering strain for alloy products of examples 1-3 of the present invention; in the figure, after heat treatment, erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr is taken as example 1, erbium-free high-zinc Al-Zn-Cu-Si in an as-cast state is taken as example 2, and erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr in an as-cast state is taken as example 3;
FIG. 4 is a graph showing the conductivity change of the as-cast and post-solid solution alloy of the alloy product of example 1-2 of the present invention.
Detailed Description
The test methods in the embodiment of the invention are all conventional methods unless specified otherwise; the reagents and materials, unless otherwise specified, are commercially available.
In the embodiment of the invention, the casting is carried out by pouring the materials in the heating furnace into a mould and cooling along with the mould; demoulding after casting to obtain the Er-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy.
In the embodiment of the invention, the die is made of cast iron.
In the embodiment of the invention, the skimming is to use a titanium alloy tool to skim the oxidized dross on the surface of the aluminum zinc copper silver melt.
In the embodiment of the invention, the erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy is a block material, the thickness is 25-35 mm, and the width is 60-70 mm.
Example 1
Preparing pure aluminum, pure zinc, aluminum copper, aluminum silicon, aluminum erbium, aluminum zirconium intermediate alloy as raw materials; wherein Zn accounts for 25-35% of the total mass of all raw materials, cu accounts for 2.5-3.5% of the total mass of all raw materials, si accounts for 2.0-3.0% of the total mass of all raw materials, er accounts for 0-0.2% of the total mass of all raw materials, zr accounts for 0-0.2% of the total mass of all raw materials, and the balance is Al;
the purity of pure aluminum and pure zinc is more than or equal to 99.98%, the copper content of aluminum-copper alloy is 60%, the silicon content of aluminum-silicon alloy is 20%, the erbium content of aluminum-erbium alloy is 6%, and the zirconium content of aluminum-zirconium alloy is 10%;
placing pure aluminum and intermediate alloy into a crucible and heating to 720 ℃ to form aluminum copper silicon erbium zirconium melt;
putting pure zinc into the melt, stirring until the pure zinc is completely melted, and preserving heat for 20min to form an aluminum zinc copper silicon erbium zirconium melt;
carrying out slag skimming treatment on the aluminum copper silicon erbium zirconium melt, and then introducing the aluminum copper silicon erbium zirconium melt into a static furnace, wherein the temperature of the aluminum copper silicon erbium zirconium melt is 720 ℃ when the aluminum copper silicon erbium zirconium melt is introduced into the static furnace; then standing for 15min in a furnace, casting to prepare high zinc Al-Zn-Cu-Si-Er-Zr alloy, cutting the prepared aluminum alloy cast ingot into samples with the thickness of 10mm multiplied by 5mm, heating along with the furnace, placing in an environment with 440 ℃, preserving heat for 12h, and immediately performing water quenching to finish homogenization treatment. Placing the aluminum alloy sample subjected to homogenization treatment in the step (4) in an environment of 120 ℃, and preserving heat for 1h to obtain an aged erbium-containing high-zinc aluminum alloy, wherein a metallographic structure diagram is shown in fig. 1, an electron microscope scanning photo is shown in fig. 2, and a stress-strain curve is shown in fig. 3; the yield strength of the erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy after aging is more than 400MPa, and the tensile strength is more than 440MPa; the mass fraction of impurities in the erbium-containing high-zinc Al-Zn-Cu-Si alloy is less than or equal to 0.3 percent, and the mass fraction of single elements in the impurities is less than or equal to 0.05 percent; the microhardness of the erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy is more than 170HV;
comparative experiments were performed using untreated alloys to obtain as-cast Al-Zn-Cu-Si-Er-Zr alloys and as-cast Al-Zn-Cu-Si alloys, with stress-strain curves as shown in FIG. 3.
Example 2
The process is the same as in example 1, except that:
(1) As-cast state, wherein Er and Zr elements are not added in the raw materials;
(2) The yield strength of the high-zinc Al-Zn-Cu-Si as-cast alloy is more than 300MPa, the tensile strength is more than 320MPa, and the microhardness is more than 150HV.
Example 3
The process is the same as in example 1, except that:
(1) The alloy contains erbium and zirconium elements, but is not subjected to the same heat treatment;
(2) The yield strength of the erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr as-cast alloy is more than 310MPa, the tensile strength is more than 350MPa, and the microhardness is more than 150HV.
Example 4
The process is the same as in example 1, except that:
(1) The alloy is not added with erbium and zirconium elements and is subjected to the same heat treatment;
(2) The yield strength of the high-zinc Al-Zn-Cu-Si alloy after heat treatment is more than 400MPa, the tensile strength is more than 430MPa, and the microhardness is more than 170HV.
Claims (9)
1. The erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy is characterized by comprising 25 to 35 mass percent of Zn, 2.5 to 3.5 mass percent of Cu, 2.0 to 3.0 mass percent of Si, 0 to 0.2 mass percent of Er, 0 to 0.2 mass percent of Zr, and the balance of Al and unavoidable impurity elements.
2. An erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy according to claim 1, wherein the mass fraction of impurities is less than or equal to 0.5% and the mass fraction of individual elements in the impurities is less than or equal to 0.1%.
3. An erbium-containing high zinc Al-Zn-Cu-Si-Er-Zr alloy according to claim 1, wherein the as-cast Al-Zn-Cu-Si-Er-Zr alloy has a microhardness > 150HV, and the alloy after heat treatment has a yield strength > 400MPa and a tensile strength > 440MPa.
4. A method for preparing the erbium-containing high zinc Al-Zn-Cu-Si-Er-Zr alloy according to any one of claims 1-3, characterized by comprising the steps of:
(1) Preparing pure aluminum, pure zinc, aluminum copper, aluminum silicon, aluminum erbium, aluminum zirconium intermediate alloy as raw materials; wherein Zn accounts for 25-35% of the total mass of all raw materials, cu accounts for 2.5-3.5% of the total mass of all raw materials, si accounts for 2.0-3.0% of the total mass of all raw materials, er accounts for 0-0.2% of the total mass of all raw materials, zr accounts for 0-0.2% of the total mass of all raw materials, and the balance is Al;
(2) Placing pure aluminum and intermediate alloy into a crucible and heating to 760-780 ℃ to form aluminum copper silicon erbium zirconium melt;
(3) Putting pure zinc into the melt, and stirring until the pure zinc is completely melted to form an aluminum zinc copper silicon erbium zirconium melt;
(4) Carrying out slag skimming treatment on the aluminum zinc copper silicon erbium zirconium melt, uniformly stirring, and pouring the melt into a prepared mould; and cooling to obtain the high-zinc Al-Zn-Cu-Si-Er-Zr alloy cast ingot.
5. The method of claim 4, wherein the alloy is heat treated by the steps of:
(5) Cutting the aluminum alloy cast ingot prepared in the step (4) into blocks such as samples with the thickness of 10mm multiplied by 5mm, heating along with a furnace, placing in an environment with the temperature of 440 ℃, preserving heat for 12 hours, and immediately performing water quenching to finish homogenization treatment;
(6) And (3) placing the homogenized aluminum alloy sample in the step (5) in an environment of 120 ℃, and preserving heat for 1h to obtain the aged erbium-containing high-zinc aluminum alloy.
6. The method according to claim 4, wherein in the step (1), the purity of pure aluminum and pure zinc is not less than 99.98%, the copper content of aluminum-copper alloy is 60%, the silicon content of aluminum-silicon alloy is 20%, the erbium content of aluminum-erbium alloy is 6%, and the zirconium content of aluminum-zirconium alloy is 10%.
7. The method of claim 4, wherein in the step (4), the skimming is performed by removing oxidized dross on the surface of the aluminum zinc copper silver melt with a titanium alloy tool; the material of the mould is cast iron.
8. The method of claim 4, wherein in step (4), the temperature of the Al-Zn-Cu-Si-Er-Zr melt at the time of pouring into the mold is 720-730 ℃.
9. The method according to claim 4, wherein in the step (4), the erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy is a block material, and the thickness is 100-200 mm, and the width is 180mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310348391.5A CN116516223A (en) | 2023-04-03 | 2023-04-03 | Erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310348391.5A CN116516223A (en) | 2023-04-03 | 2023-04-03 | Erbium-containing high-zinc Al-Zn-Cu-Si-Er-Zr alloy and preparation method thereof |
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