CN115369280A - C17460 alloy and preparation process thereof - Google Patents
C17460 alloy and preparation process thereof Download PDFInfo
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- CN115369280A CN115369280A CN202211003308.2A CN202211003308A CN115369280A CN 115369280 A CN115369280 A CN 115369280A CN 202211003308 A CN202211003308 A CN 202211003308A CN 115369280 A CN115369280 A CN 115369280A
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 84
- 239000000956 alloy Substances 0.000 title claims abstract description 84
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 25
- 238000005260 corrosion Methods 0.000 claims abstract description 22
- 230000007797 corrosion Effects 0.000 claims abstract description 21
- 239000000654 additive Substances 0.000 claims abstract description 20
- 238000000137 annealing Methods 0.000 claims abstract description 18
- 230000000996 additive effect Effects 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 9
- 239000010949 copper Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 238000005097 cold rolling Methods 0.000 claims description 6
- 238000005098 hot rolling Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000006104 solid solution Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- 229910003271 Ni-Fe Inorganic materials 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 3
- 229910052790 beryllium Inorganic materials 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 229910002058 ternary alloy Inorganic materials 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 229910002482 Cu–Ni Inorganic materials 0.000 claims description 2
- 238000005088 metallography Methods 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 12
- 238000005266 casting Methods 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 210000001787 dendrite Anatomy 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 7
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 5
- 229910000881 Cu alloy Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021652 non-ferrous alloy Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- 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
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Abstract
The invention discloses a C17460 alloy and a preparation process thereof, and relates to the technical field of alloy casting, wherein the alloy comprises the following components in parts by mass: ni:0.8 to 1.5, zr:0.5-1.0, fe:2.5-5.0, and also comprises Be:0.6 to 1.2, ti as additive: 0.6-0.8; rare earth elements: 0.03 Tsu Y + La Ap 0.1; impurity content not greater than 0.3%, balance Cu; the presence of annealing twins in the alloy, the average grain size of which is between 17 and 21 μm; the La is applied to the corrosion-resistant element, the mass part component of the La is 0.022, and the mass part component of the Y is 0.1. By adding a proper amount of rare earth elements into the alloy, the originally existing coarse dendrites in the alloy can be converted into fine equiaxed crystals, so that the corrosion resistance of the alloy is improved, a layer of dense rare earth phase is formed in corrosion products, the formation of the corrosion products with the protection property is accelerated, and further corrosion of an alloy matrix can be prevented.
Description
Technical Field
The invention relates to the technical field of alloy casting, in particular to a C17460 alloy and a preparation process thereof.
Background
The C17460 alloy is a beryllium copper alloy, the beryllium copper is a supersaturated solid solution copper base alloy, it is the nonferrous alloy that the mechanical property, physical property, chemical property and corrosion resistance combine well, after solutionizing and aging treatment, it has high strength limit, elastic limit, yield limit and fatigue limit equivalent to special steel, possess high conductivity, thermal conductivity, high hardness and wearability at the same time, high creep resistance and corrosion resistance, the use is extensive, it is the indispensable important industrial material of national economic construction.
However, the existing beryllium copper alloy has poor corrosion resistance due to the coarse crystal structure of the internal metallographic structure, and is easy to corrode in seawater, so that the service life of components is influenced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the C17460 alloy and the preparation process thereof, and solves the problems in the background art by increasing the corrosion resistance of beryllium copper alloy in common beryllium copper alloy.
(II) technical scheme
In order to realize the purpose, the invention is realized by the following technical scheme: the C17460 alloy comprises the following components in parts by mass: ni:0.8 to 1.5, zr:0.5-1.0, fe:2.5-5.0, further comprising as additives Be:0.6-1.2, ti as additive: 0.6-0.8; rare earth elements: 0.03 Tsu Y + La Ap 0.1; impurity content not greater than 0.3%, the balance being Cu; annealed twins are present in the alloy with an average grain size between 17 and 21 μm; the method is applied to the corrosion-resistant elements,
further, the mass part component of La is 0.022, and the mass part component of Y is 0.1.
Further, in a γ -phase solid solution formed of Cu — Ni, the Y content is 2 to 3at.%.
Further, the alloy is formed with a rare earth second phase having a particle size of 300-500nm, the rare earth second phase comprising a Cu6La compound.
Furthermore, the tensile strength of the alloy at room temperature is 775MPa, the yield strength is 678MPa, and the elongation is 20.2%.
Further, zr, ni and Fe are added into the prepared alloy in the form of intermediate ternary alloy as an additive.
A process for the manufacture of a C17460 alloy, comprising the steps of: adding the electrolytic copper ingot into a dry boiler, heating to a temperature not lower than 1050 ℃ until the electrolytic copper ingot is completely melted; after the intermediate alloy is melted, adding the intermediate alloy of Zr-Ni-Fe, and mixing by using a stirrer until the mixture is uniform; reducing the temperature of the mixed melt to 900 ℃ by using heat dissipation or ventilation equipment, and carrying out heat preservation treatment for 1-2 hours; adding metal ingots of Be, ti, Y and La into the mixed melt in a solution treatment mode until the metal ingots are completely melted, continuously stirring and uniformly mixing; standing for at least 15min to reduce the temperature of the melt to form an alloy melt, and stirring to complete the mixing of a plurality of metallography, thereby finishing the smelting of the alloy.
A method of making a sheet of C17460 alloy, comprising: adjusting the temperature of the C17460 alloy to 1000-1100 ℃, preserving the heat for 3h under the temperature condition, and performing homogenization annealing treatment when the temperature is approximately 1050 ℃; and then hot rolling, primary cold rolling, intermediate annealing to obtain a recrystallized structure, secondary cold rolling, finally annealing, and finally preparing the C17460 alloy plate.
Further, the temperature of intermediate annealing and annealing treatment is 750-850 ℃; the hot rolling temperature was 950 ℃.
A C17460 alloy plate with a thickness of 1.5-3.0mm.
(III) advantageous effects
The invention provides a C17460 alloy and a preparation process thereof. The method has the following beneficial effects:
by adding a proper amount of rare earth elements into the alloy, the originally existing coarse dendrites in the alloy can be converted into fine equiaxed crystals, so that the corrosion resistance of the alloy is improved, a layer of dense rare earth phase is formed in corrosion products, the formation of the corrosion products with the protection property is accelerated, and further corrosion of an alloy matrix can be prevented.
Drawings
FIG. 1 is a schematic metallographic representation of the structure of C17460 according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Examples
Referring to FIG. 17460, the present invention provides a C17460 alloy prepared by the steps of:
a first portion; alloy ingredient
The components to be prepared in parts by mass are as follows: ni:0.8 to 1.5, zr:0.5-1.0, fe:2.5-5.0, and also comprises Be:0.6 to 1.2, ti as additive: 0.6-0.8;
rare earth elements: 0.03 Tzu Y + La and 0.1; impurity content not greater than 0.3%, the balance being Cu;
wherein, as an alternative, the components of the rare earth elements in parts by mass can also be as follows: la:0.04-0.35, Y:0.01 to 0.18, for example, 0.022 for La, 0.1 for Y, and 0.032 in total; of course, other rare earth elements may be selected instead of La and Y to achieve similar effects.
Wherein Zr, ni and Fe are in the form of intermediate ternary alloy and are added into the prepared alloy as an additive.
By adding Be into the alloy in the form of additive, the crystal of brittle compound in the alloy can Be changed into a fine equiaxial shape from a coarse acicular shape and a lamellar shape, thereby improving the strength and plasticity of the alloy and conveniently obtaining a high-quality casting with higher strength and good plasticity.
A second portion; alloy melting
After the components of the alloy are identified, the components need to be melted together;
adding the prepared electrolytic copper ingot into a dry boiler, heating to a temperature not lower than 1050 ℃ until the electrolytic copper ingot is completely melted; after the molten Zr-Ni-Fe intermediate alloy is added, and a stirrer is used for mixing until the mixture is uniform;
reducing the temperature of the mixed melt to 900 ℃ by using heat dissipation or ventilation equipment, and carrying out heat preservation treatment for 1-2 hours; adding metal ingots of Be, ti, Y and La into the mixed melt in a solution treatment mode until the metal ingots are completely melted, continuously stirring and uniformly mixing;
standing for at least 15min to reduce the temperature of the melt to form an alloy melt, keeping the adding time at about 5min, and stirring by a stirrer until a plurality of metallographic phases are completely mixed, wherein the smelting of the alloy is completed;
in the metallographic recrystallization structure of the alloy, a large number of annealing twin crystals are formed, the migration of twin boundaries enables grains to gradually tend to be uniformly distributed, the characteristic distribution of alloy grain boundaries is optimized, and the average grain size of the twin boundaries is between 17 and 21 mu m.
A third portion; alloy casting
As a further treatment, adjusting the temperature of the mixed gold phase to 1000-1100 ℃, preserving the heat for 3h under the condition of the temperature, and carrying out homogenization annealing treatment when the temperature is approximately 1050 ℃;
hot rolling, primary cold rolling, intermediate annealing to obtain a recrystallized structure, secondary cold rolling, and finally annealing, wherein the temperature of the intermediate annealing and the annealing is 750-850 ℃; the hot rolling temperature is 950 ℃, and finally the plate with the thickness of 1.5-3.0mm is manufactured.
The C17460 alloy and the plate thereof are prepared by the treatment of the three parts.
Experimental example 1
The alloy to be prepared comprises the following components in parts by mass: ni:0.8 to 1.5, zr:0.5-1.0, fe:2.5-5.0, and also comprises Be:0.6, ti as an additive: 0.6-0.8; rare earth elements: the value of Y + La was 0.04; an impurity content of not more than 0.3%, the balance being Cu, forming a material T1.
Experimental example 2
The alloy to be prepared comprises the following components in parts by mass: ni:0.8 to 1.5, zr:0.5-1.0, fe:2.5-5.0, further comprising as additives Be:0.6, ti as an additive: 0.6-0.8; rare earth elements: the value of Y + La was 0.065; an impurity content of not more than 0.3%, the remainder being Cu, forming material T2.
Experimental example 3
The alloy to be prepared comprises the following components in parts by mass: ni:0.8 to 1.5, zr:0.5-1.0, fe:2.5-5.0, further comprising as additives Be:0.6, ti as an additive: 0.6-0.8; rare earth elements: the value of Y + La was 0.09; an impurity content of not more than 0.3%, the remainder being Cu, forming material T3.
Experimental example 4
The alloy to be prepared comprises the following components in parts by mass: ni:0.8 to 1.5, zr:0.5-1.0, fe:2.5-5.0, and also comprises Be:1.2, ti as additive: 0.6-0.8; rare earth elements: the value of Y + La was 0.04; an impurity content of not more than 0.3%, the remainder being Cu, forming material T4.
Experimental example 5
The alloy to be prepared comprises the following components in parts by mass: ni:0.8 to 1.5, zr:0.5-1.0, fe:2.5-5.0, further comprising as additives Be:1.2, ti as additive: 0.6-0.8; rare earth elements: the value of Y + La was 0.065; an impurity content of not more than 0.3%, the remainder being Cu, forming material T5.
Experimental example 6
The alloy to be prepared comprises the following components in parts by mass: ni:0.8 to 1.5, zr:0.5-1.0, fe:2.5-5.0, further comprising as additives Be:1.2, ti as additive: 0.6-0.8; rare earth elements: the value of Y + La was 0.09; an impurity content of not more than 0.3%, the remainder being Cu, forming material T6.
Selecting materials T1 to T6 as manufacturing experiment patterns, carrying out mechanical property detection, and obtaining detection results shown in the following table;
TABLE 1 mechanical Properties of the alloy sheets obtained
In the technical scheme, by adding a proper amount of rare earth elements into the alloy, the originally existing coarse dendrites in the alloy can be converted into fine equiaxed crystals, so that the corrosion resistance of the alloy is improved, a layer of dense rare earth phase is formed in a corrosion product, the formation of a protective corrosion product is accelerated, and further corrosion of an alloy matrix can be prevented.
The rare earth Y is added into the alloy, the alloy stacking fault energy can be reduced, the proportion of special crystal boundaries is improved, the corrosion resistance of the alloy is improved, and when the content of Y in a gamma-phase solid solution formed by Cu-Ni is 2-3at.%, the self-corrosion potential is the most positive, and the corrosion resistance is better.
When the La content is low, the crystal of the alloy is a columnar crystal structure, when the La content is gradually increased, the transformation from the columnar crystal structure to an isometric crystal structure occurs, and when the La content is high, the isometric crystal structure is formed; and the rare earth element La reacts with Cu to generate a second phase, the grain diameter of the rare earth second phase is between 300 and 500nm, and the second phase particles are Cu 6 The La compound is beneficial to improving the passivation capability of the alloy surface.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A C17460 alloy, characterized by: comprises the following components in parts by mass: ni:0.8 to 1.5, zr:0.5-1.0, fe:2.5-5.0, further comprising as additives Be:0.6 to 1.2, ti as additive: 0.6-0.8;
rare earth elements: 0.03 Tsu Y + La Ap 0.1; impurity content not greater than 0.3%, balance Cu;
the presence of annealing twins in the alloy, the average grain size of which is between 17 and 21 μm; the method is applied to corrosion-resistant elements.
2. The C17460 alloy of claim 1, wherein: the mass part of the La component is 0.022, and the mass part of the Y component is 0.1.
3. The C17460 alloy of claim 1, wherein: in the gamma phase solid solution formed by Cu-Ni, the Y content is 2-3at.%.
4. The C17460 alloy of claim 1, wherein: the alloy forms a rare earth second phase with a grain size of 300-500nm, the rare earth second phase comprises Cu 6 And (3) a La compound.
5. The C17460 alloy of claim 1, wherein: the alloy has 775MPa of tensile strength at room temperature, 678MPa of yield strength and 20.2 percent of elongation.
6. The C17460 alloy of claim 1, wherein: zr, ni and Fe are added into the prepared alloy as additives in the form of intermediate ternary alloy.
7. A manufacturing process of a C17460 alloy, which is characterized in that: the method comprises the following steps:
adding the electrolytic copper ingot into a dry boiler, heating to a temperature not lower than 1050 ℃ until the electrolytic copper ingot is completely melted; after the molten Zr-Ni-Fe intermediate alloy is added, and a stirrer is used for mixing until the mixture is uniform;
reducing the temperature of the mixed melt to 900 ℃ by using heat dissipation or ventilation equipment, and carrying out heat preservation treatment for 1-2 hours;
adding metal ingots of Be, ti, Y and La into the mixed melt in a solution treatment mode until the metal ingots are completely melted, continuously stirring and uniformly mixing;
standing for at least 15min to reduce the temperature of the melt to form an alloy melt, and stirring to complete the mixing of a plurality of metallography, thereby finishing the smelting of the alloy.
8. A preparation method of a plate made of C17460 alloy is characterized by comprising the following steps: the method comprises the following steps:
adjusting the temperature of the C17460 alloy to 1000-1100 ℃, preserving the heat for 3 hours under the temperature condition, and performing homogenization annealing treatment when the temperature is approximately 1050 ℃;
and then hot rolling, primary cold rolling, intermediate annealing to obtain a recrystallized structure, secondary cold rolling, finally annealing, and finally preparing the C17460 alloy plate.
9. The method for preparing a C17460 alloy plate according to claim 8, wherein the temperature of the intermediate annealing and the annealing treatment is 750-850 ℃; the hot rolling temperature was 950 ℃.
10. A sheet of C17460 alloy, prepared by the method of claims 8-9, wherein: the thickness of the plate is 1.5-3.0mm.
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| 郭鸿发等, 冶金工业出版社 * |
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