CN114645155A - High-strength copper alloy and preparation method thereof - Google Patents
High-strength copper alloy and preparation method thereof Download PDFInfo
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- CN114645155A CN114645155A CN202210290224.5A CN202210290224A CN114645155A CN 114645155 A CN114645155 A CN 114645155A CN 202210290224 A CN202210290224 A CN 202210290224A CN 114645155 A CN114645155 A CN 114645155A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
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- 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
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Abstract
The invention provides a high-strength copper alloy which comprises the following chemical components in percentage by mass: 4.5-7.2% of Ni, 4.1-6.6% of Sn, 0.16-3.5% of microalloying incidental elements and the balance of Cu; the microalloying incidental element is at least one of Co, Ti and Y. The invention optimizes and improves the components on the basis of the Cu-Ni-Sn series copper alloy, and can be used for improving the cast structure and the processing performance of the alloy by adding at least one element of Co, Ti and Y so as to ensure that the alloy can obtain high strength. Experimental results show that the tensile strength of the copper alloy is 1180-1320 MPa, the hardness is 380-402 HV, the conductivity is 12-17% IACS, the elongation is 6-9%, and the relaxation rate at 200 ℃ is 2-6%.
Description
Technical Field
The invention relates to the technical field of nonferrous metals, in particular to a high-strength copper alloy and a preparation method thereof.
Background
With the rapid development of the information industry and the modern industry, the application range of the copper alloy is increasingly wide, the demand volume is continuously increased, and the copper alloy material becomes one of the most important basic materials for the national economy and social development. The copper alloy is required to have high strength performance due to the application of the copper alloy in the field of components such as an electricity induction system of a high-speed railway, a gun rail of an electromagnetic gun, a connector assembly in an electronic component, a bearing bush sleeve and the like.
At present, the high-strength copper alloy is a Cu-Ni-Sn series copper alloy, but because the melting point of tin is low and the crystallization range is large, the ingot of the alloy has serious macro segregation and dendritic segregation, which seriously influences the strength of the alloy. Therefore, it is an urgent problem in the art to improve the strength of Cu — Ni — Sn based copper alloys.
Disclosure of Invention
The invention aims to provide a high-strength copper alloy and a preparation method thereof. The copper alloy provided by the invention has higher strength.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a high-strength copper alloy which comprises the following chemical components in percentage by mass: 4.5-7.2% of Nis, 4.1-6.6% of Sns, 0.16-3.5% of microalloyed incidental elements and the balance of Cu; the microalloying incidental element is at least one of Co, Ti and Y.
Preferably, the chemical components comprise, in mass percent: 5.4-6.5% of Ni, 5.1-6.1% of Sn, 0.16-3.5% of microalloying accessory elements and the balance of Cu.
Preferably, the microalloying incidental element is at least one of Co 0.05-1.8%, Ti 0.01-0.5% and Y0.1-1.2%.
Preferably, the microalloying incidental element is at least one of 0.2 to 1.2 percent of Co, 0.08 to 0.2 percent of Ti and 0.3 to 1.0 percent of Y.
The invention also provides a preparation method of the high-strength copper alloy, which comprises the following steps:
(1) smelting and casting a copper alloy raw material in sequence to obtain an alloy ingot;
(2) carrying out solid solution treatment on the alloy ingot obtained in the step (1) to obtain a solid solution alloy;
(3) cold rolling the solid solution state alloy obtained in the step (2) to obtain a rolled state alloy;
(4) and (4) carrying out aging treatment on the rolled alloy obtained in the step (3) to obtain the high-strength copper alloy.
Preferably, the smelting temperature in the step (1) is 1170-1350 ℃.
Preferably, the temperature for casting in the step (1) is 1130-1250 ℃.
Preferably, the temperature of the solution treatment in the step (2) is 750-930 ℃, and the heat preservation time of the solution treatment is 1-20 h.
Preferably, the cold rolling in the step (3) is multi-pass cold rolling, and the deformation amount of each pass of cold rolling is 5-20%.
Preferably, the temperature of the aging treatment in the step (4) is 350-700 ℃, and the heat preservation time of the aging treatment is 1-20 h.
The invention provides a high-strength copper alloy which comprises the following chemical components in percentage by mass: 4.5-7.2% of Nis, 4.1-6.6% of Sn, 0.16-3.5% of microalloyed incidental elements and the balance of Cu; the microalloying incidental element is at least one of Co, Ti and Y. The invention optimizes and improves the components on the basis of the Cu-Ni-Sn series copper alloy, and can improve the cast structure and the processing performance of the alloy by adding at least one element of Co, Ti and Y so as to ensure that the alloy can obtain high strength. Experimental results show that the tensile strength of the copper alloy is 1180-1320 MPa, the hardness is 380-402 HV, the electric conductivity is 12-17% IACS, the elongation is 6-9%, and the relaxation rate at 200 ℃ is 2-6%.
Detailed Description
The invention provides a high-strength copper alloy which comprises the following chemical components in percentage by mass: 4.5-7.2% of Nis, 4.1-6.6% of Sn, 0.16-3.5% of microalloyed incidental elements and the balance of Cu; the microalloying incidental element is at least one of Co, Ti and Y.
According to the mass percentage, the high-strength copper alloy provided by the invention comprises 4.5-7.2% of Ni, preferably 5.4-6.5%, further preferably 5.7-6.3%, more preferably 5.8-6.2%, and most preferably 6.1%. In the invention, the Ni element can form solid solution strengthening effect after being dissolved into the copper matrix, the strength of the alloy can be effectively improved, when the Ni content is lower than 4.5%, the strengthening effect is not obvious, and when the Ni content is higher than 7.2%, the conductivity and the processability of the alloy are weakened.
According to the mass percentage, the high-strength copper alloy provided by the invention also comprises 4.1-6.6% of Sn, preferably 5.1-6.1%, further preferably 5.2-5.9%, more preferably 5.3-5.8%, and most preferably 5.5%. In the invention, the Sn element can form a nickel-tin compound with Ni in the aging process and is separated out from the matrix, the fine and dispersed nickel-tin compound can strengthen the alloy and can restore the conductivity of the alloy to a certain extent, when the Sn content is lower than 4.1 percent, the advantages are not obvious, and when the Sn content is higher than 6.6 percent, the conductivity of the alloy is reduced sharply, the hot workability of the alloy is influenced, and the hot rolling cracking is easy to occur.
The high-strength copper alloy provided by the invention further comprises 0.16-3.5% of microalloying incidental elements in percentage by mass, preferably 0.28-1.7%, further preferably 0.8-1.2%, and more preferably 0.9%. In the present invention, the microalloying incidental element is at least one of Co, Ti and Y, preferably at least two of Co, Ti and Y, and more preferably Co, Ti and Y. The invention can be used for improving the cast structure and the processing property of the alloy by adding at least one of Co, Ti and Y, so as to ensure that the alloy can obtain high strength.
In the present invention, the microalloying incidental element is preferably at least one of Co 0.05 to 1.8%, Ti 0.01 to 0.5%, and Y0.1 to 1.2%.
In the present invention, when the high-strength copper alloy includes Co, the Co is preferably 0.05 to 1.8%, more preferably 0.2 to 1.2%, and still more preferably 0.5 to 1.0% by mass. The invention can improve the segregation of alloy components by controlling the content of Co element, and obviously inhibit the nucleation and growth of discontinuous precipitation.
In the present invention, when the high-strength copper alloy includes Ti, the Ti is preferably 0.01 to 0.5%, more preferably 0.08 to 0.2%, and still more preferably 0.1 to 1.5% by mass. The invention can increase the fluidity of the melt, improve the cast structure and refine the alloy grains by controlling the content of Ti element.
In the present invention, when the high-strength copper alloy includes Y, the Y is preferably 0.1 to 1.2% by mass, more preferably 0.3 to 1.0% by mass, even more preferably 0.4 to 0.7% by mass, and most preferably 0.5 to 0.6% by mass. The invention can improve the stress relaxation resistance of the alloy and inhibit the recrystallization of the alloy by controlling the content of the Y element.
According to the mass percentage, the high-strength copper alloy provided by the invention also comprises the balance of Cu. In the present invention, Cu is used as a base material.
In the present invention, the Ni/Sn is preferably 0.9 to 1.2, more preferably 1.0 to 1.1. The invention can further improve the strength of the copper alloy by controlling the Ni/Sn, avoid that enough amplitude modulation decomposition tissue can not be formed when the Ni/Sn ratio is lower, the alloy strength is not enough, and can also avoid that the grain boundary segregation is more serious when the Ni/Sn ratio is higher, thereby influencing the processing performance of the material.
The invention optimizes and improves the components on the basis of the Cu-Ni-Sn series copper alloy, and can be used for improving the cast structure and the processing performance of the alloy by adding at least one element of Co, Ti and Y so as to ensure that the alloy can obtain high strength.
The copper alloy provided by the invention has the elongation of 6-10%, the stress relaxation rate at 200 ℃ is less than 6%, and the copper alloy has the advantages of high strength, high corrosion resistance, excellent stress relaxation resistance and good conductivity, and is widely used for manufacturing conductive components such as bearings, bearing bushes, bearing sleeves, high-power electronic elements, precise plug-in terminals and the like; in addition, the addition of at least one element of Co, Ti and Y effectively solves the segregation problem of the high-tin copper alloy, inhibits the discontinuous precipitation of the alloy in the aging process from damaging the alloy performance, and has high yield.
The invention also provides a preparation method of the high-strength copper alloy, which comprises the following steps:
(1) smelting and casting a copper alloy raw material in sequence to obtain an alloy ingot;
(2) carrying out solid solution treatment on the alloy ingot obtained in the step (1) to obtain a solid solution alloy;
(3) cold rolling the solid solution state alloy obtained in the step (2) to obtain a rolled state alloy;
(4) and (4) carrying out aging treatment on the rolled alloy obtained in the step (3) to obtain the high-strength copper alloy.
According to the invention, a copper alloy raw material is sequentially smelted and cast to obtain an alloy ingot.
In the present invention, the copper alloy raw material preferably includes an up-drawing copper rod, a pure nickel block and a pure tin pellet, and at least one of an electrolytic cobalt sheet, an industrially pure titanium and a Cu20Y master alloy. In the present invention, the purity of each of the copper alloy raw materials is preferably more than 99.95 wt%. The source of each copper alloy raw material is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used.
In the present invention, the melting is preferably carried out in a vacuum induction furnace; the smelting is preferably carried out in a protective atmosphere; the protective atmosphere is preferably argon. The type of the vacuum intermediate frequency induction furnace is not particularly limited, and instruments and equipment well known to those skilled in the art can be adopted. The amount of the argon is not particularly limited, and the pressure during smelting is guaranteed to be 85000-95000 Pa.
In the invention, the smelting temperature is preferably 1170-1350 ℃. The melting time is not particularly limited in the present invention, and it is sufficient to ensure that each raw material is completely melted.
In the invention, the casting temperature is preferably 1130-1250 ℃, more preferably 1160-1200 ℃, and more preferably 1180-1190 ℃. The invention can further improve the quality of the copper alloy by controlling the casting temperature.
After the casting is finished, the invention preferably sequentially cools and mills the surface of the product obtained by casting to obtain the alloy cast ingot.
The operation of the cooling is not particularly limited in the present invention, and natural cooling known to those skilled in the art may be employed.
The surface milling operation is not particularly limited in the present invention, and a surface milling operation known to those skilled in the art may be used. The invention can cut the blank surface or redundant parts on the workpiece by adopting the milling surface, so that the workpiece meets the requirements on size and precision.
After the alloy ingot is obtained, the alloy ingot is subjected to solid solution treatment to obtain a solid solution alloy.
In the present invention, the solution treatment is preferably performed in a resistance furnace. The type of the resistance furnace is not particularly limited in the invention, and instruments and equipment well known to those skilled in the art can be adopted.
In the invention, the temperature of the solution treatment is preferably 750-930 ℃, more preferably 780-870 ℃, more preferably 800-840 ℃, and most preferably 830 ℃; the time for the solution treatment is preferably 1 to 20 hours, more preferably 8 to 16 hours, even more preferably 10 to 15 hours, and most preferably 12 hours. The invention can further improve the strength of the copper alloy through the temperature and the heat preservation time of the solution treatment.
In the present invention, the solution treatment is preferably performed by water cooling. The water cooling operation is not particularly limited in the present invention, and a water cooling operation known to those skilled in the art may be used.
After the solid solution alloy is obtained, the invention carries out cold rolling on the solid solution alloy to obtain the rolling alloy.
In the invention, the cold rolling is preferably multi-pass cold rolling, and the deformation of each pass of cold rolling is preferably 5-20%; the total deformation amount of the cold rolling is preferably 30-90%, and more preferably 50-70%; the cooling is preferably carried out at room temperature. The invention can further improve the performance of the alloy by controlling the technological parameters of cold rolling.
After the rolled alloy is obtained, the rolled alloy is subjected to aging treatment to obtain the high-strength copper alloy.
In the invention, the temperature of the aging treatment is preferably 350-700 ℃, more preferably 550-640 ℃, more preferably 570-600 ℃ and most preferably 580 ℃; the heat preservation time of the aging treatment is preferably 1-20 h, more preferably 4-12 h, even more preferably 5-10 h, and most preferably 8 h. The invention can further improve the performance of the alloy by controlling the temperature and the heat preservation time of the aging treatment.
In the present invention, the cooling method of the aging treatment is preferably air cooling. The air cooling operation is not particularly limited in the present invention, and an air cooling operation known to those skilled in the art may be employed.
The preparation method provided by the invention is simple, short in process flow and low in energy consumption.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The high-strength copper alloy comprises the following chemical components in percentage by mass: 5.8% of Ni, 5.3% of Sn, 0.5% of Co, 0.4% of Y and the balance of Cu;
the preparation method of the high-strength copper alloy comprises the following steps:
(1) putting a copper rod, a pure nickel block, pure tin particles, an electrolytic cobalt sheet and a Cu20Y intermediate alloy which are taken from a copper alloy raw material into a crucible of a vacuum induction smelting furnace, vacuumizing to below 10Pa, smelting, filling argon after the raw material is completely molten, filling the pressure of a smelting chamber to 95000Pa, then preserving the temperature for 8min, finally casting into an iron mold, naturally cooling, taking out and milling the surface to obtain an alloy cast ingot; wherein the smelting temperature is 1170 ℃; the casting temperature is 1160 ℃; milling amount of the milling surface is 1mm from the upper surface to the lower surface, and the left side surface and the right side surface are 0.8 mm;
(2) carrying out solid solution treatment on the alloy ingot obtained in the step (1) in a resistance furnace to obtain a solid solution alloy; wherein the temperature of the solution treatment is 780 ℃, the heat preservation time is 8h, and the cooling mode is water cooling;
(3) cold rolling the solid solution state alloy obtained in the step (2) at room temperature to obtain a rolled state alloy; wherein the total deformation of the cold rolling is 30 percent, and the deformation of each pass is controlled between 5 percent and 20 percent;
(4) carrying out aging treatment on the rolled alloy obtained in the step (3) to obtain a high-strength copper alloy; wherein the temperature of the aging treatment is 600 ℃, the heat preservation time is 4h, and the cooling mode is air cooling.
Example 2
The high-strength copper alloy comprises the following chemical components in percentage by mass: 6.2% of Ni, 5.5% of Sn, 0.2% of Ti, 0.6% of Y and the balance of Cu;
the preparation method of the high-strength copper alloy comprises the following steps:
(1) putting a copper rod, a pure nickel block, pure tin particles, industrial pure titanium and a Cu20Y intermediate alloy which are taken from a copper alloy raw material into a crucible of a vacuum induction smelting furnace, vacuumizing to below 10Pa, smelting, filling argon after the raw material is completely molten, filling the pressure of a smelting chamber to 95000Pa, then preserving the temperature for 8min, finally casting into an iron mold, naturally cooling, taking out and milling the surface to obtain an alloy cast ingot; wherein the smelting temperature is 1230 ℃; the casting temperature is 1190 ℃; milling amount of the milling surface is 1mm from the upper surface to the lower surface, and the left side surface and the right side surface are 0.8 mm;
(2) carrying out solid solution treatment on the alloy ingot obtained in the step (1) in a resistance furnace to obtain a solid solution alloy; wherein the temperature of the solution treatment is 800 ℃, the heat preservation time is 10h, and the cooling mode is water cooling;
(3) cold rolling the solid solution state alloy obtained in the step (2) at room temperature to obtain a rolled state alloy; wherein the total deformation of the cold rolling is 50 percent, and the deformation of each pass is controlled between 5 percent and 20 percent;
(4) carrying out aging treatment on the rolled alloy obtained in the step (3) to obtain a high-strength copper alloy; wherein the temperature of the aging treatment is 640 ℃, the heat preservation time is 5h, and the cooling mode is air cooling.
Example 3
The high-strength copper alloy comprises the following chemical components in percentage by mass: 6.1% of Ni, 5.8% of Sn, 0.08% of Ti, 0.2% of Co and the balance of Cu;
the preparation method of the high-strength copper alloy comprises the following steps:
(1) putting a copper rod, a pure nickel block, pure tin particles, industrial pure titanium and an electrolytic cobalt sheet which are led upwards from a copper alloy raw material into a crucible of a vacuum induction smelting furnace, vacuumizing to below 10Pa, smelting, filling argon after the raw material is completely molten, filling the pressure of a smelting chamber to 90000Pa, then preserving the temperature for 5min, finally casting into an iron mold, naturally cooling, taking out, and milling the surface to obtain an alloy cast ingot; wherein the smelting temperature is 1260 ℃; the casting temperature is 1180 ℃; milling amount of the milling surface is 1mm from the upper surface to the lower surface, and the left side surface and the right side surface are 0.8 mm;
(2) carrying out solid solution treatment on the alloy ingot obtained in the step (1) in a resistance furnace to obtain a solid solution alloy; wherein the temperature of the solution treatment is 830 ℃, the heat preservation time is 15h, and the cooling mode is water cooling;
(3) cold rolling the solid solution state alloy obtained in the step (2) at room temperature to obtain a rolled state alloy; wherein the total deformation of the cold rolling is 70 percent, and the deformation of each pass is controlled between 5 percent and 20 percent;
(4) carrying out aging treatment on the rolled alloy obtained in the step (3) to obtain a high-strength copper alloy; wherein the temperature of the aging treatment is 580 ℃, the heat preservation time is 8h, and the cooling mode is air cooling.
Example 4
The high-strength copper alloy comprises the following chemical components in percentage by mass: 5.7% of Ni, 5.2% of Sn, 0.5% of Co, 0.1% of Ti, 0.7% of Y and the balance of Cu;
the preparation method of the high-strength copper alloy comprises the following steps:
(1) putting a copper rod, a pure nickel block, pure tin particles, an electrolytic cobalt sheet, industrial pure titanium and a Cu20Y intermediate alloy which are led upwards from a copper alloy raw material into a crucible of a vacuum induction smelting furnace, vacuumizing to below 10Pa, smelting, filling argon after the raw material is completely molten, filling the pressure of a smelting chamber to 95000Pa, preserving the temperature for 8min, finally casting into an iron mold, naturally cooling, taking out, and milling the surface to obtain an alloy cast ingot; wherein the smelting temperature is 1290 ℃; the casting temperature is 1200 ℃; milling amount of the milling surface is 1mm from the upper surface to the lower surface, and the left side surface and the right side surface are 0.8 mm;
(2) carrying out solid solution treatment on the alloy ingot obtained in the step (1) in a resistance furnace to obtain a solid solution alloy; wherein the temperature of the solution treatment is 870 ℃, the heat preservation time is 12h, and the cooling mode is water cooling;
(3) cold rolling the solid solution state alloy obtained in the step (2) at room temperature to obtain a rolled state alloy; wherein the total deformation of the cold rolling is 90 percent, and the deformation of each pass is controlled between 5 percent and 20 percent;
(4) carrying out aging treatment on the rolled alloy obtained in the step (3) to obtain a high-strength copper alloy; wherein the temperature of the aging treatment is 550 ℃, the heat preservation time is 10h, and the cooling mode is air cooling.
Example 5
The high-strength copper alloy comprises the following chemical components in percentage by mass: 6.3% of Ni, 5.9% of Sn, 1.2% of Co, 0.2% of Ti, 0.3% of Y and the balance of Cu;
the preparation method of the high-strength copper alloy comprises the following steps:
(1) putting a copper rod, a pure nickel block, pure tin particles, an electrolytic cobalt sheet, industrial pure titanium and a Cu20Y intermediate alloy which are led upwards from a copper alloy raw material into a crucible of a vacuum induction smelting furnace, vacuumizing to below 10Pa, smelting, filling argon after the raw material is completely molten, filling the pressure of a smelting chamber to 95000Pa, preserving the temperature for 8min, finally casting into an iron mold, naturally cooling, taking out, and milling the surface to obtain an alloy cast ingot; wherein the smelting temperature is 1350 ℃; the casting temperature is 1220 ℃; milling amount of the milling surface is 1mm from the upper surface to the lower surface, and the left side surface and the right side surface are 0.8 mm;
(2) carrying out solid solution treatment on the alloy ingot obtained in the step (1) in a resistance furnace to obtain a solid solution alloy; wherein the temperature of the solution treatment is 840 ℃, the heat preservation time is 16h, and the cooling mode is water cooling;
(3) cold rolling the solid solution state alloy obtained in the step (2) at room temperature to obtain a rolled state alloy; wherein the total deformation of the cold rolling is 70 percent, and the deformation of each pass is controlled between 5 percent and 20 percent;
(4) carrying out aging treatment on the rolled alloy obtained in the step (3) to obtain a high-strength copper alloy; wherein the temperature of the aging treatment is 570 ℃, the heat preservation time is 12h, and the cooling mode is air cooling.
Comparative example 1
Commercially available C72700 copper alloy
Comparative example 2
Commercial C72900 copper alloy
The copper alloys obtained in examples 1 to 5 and comparative examples 1 to 2 were subjected to performance tests, and the results are shown in table 1.
TABLE 1 Performance data for copper alloys prepared in examples 1-5 and comparative examples 1-2
As can be seen from table 1, the copper alloy provided by the present invention has high strength, high conductivity, high toughness and excellent stress relaxation resistance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A high-strength copper alloy comprises the following chemical components in percentage by mass: 4.5-7.2% of Ni, 4.1-6.6% of Sns, 0.16-3.5% of microalloying incidental elements and the balance of Cu; the microalloying incidental element is at least one of Co, Ti and Y.
2. The high strength copper alloy of claim 1, wherein the chemical composition comprises, in mass percent: 5.4-6.5% of Ni, 5.1-6.1% of Sn, 0.16-3.5% of microalloying accessory elements and the balance of Cu.
3. The high strength copper alloy according to claim 1 or 2, wherein the microalloying incidental element is at least one of Co 0.05 to 1.8%, Ti 0.01 to 0.5%, and Y0.1 to 1.2%.
4. The high strength copper alloy of claim 3, wherein the micro-alloying incidental element is at least one of Co 0.2 to 1.2%, Ti 0.08 to 0.2%, and Y0.3 to 1.0%.
5. The method for producing the high-strength copper alloy according to any one of claims 1 to 4, comprising the steps of:
(1) smelting and casting a copper alloy raw material in sequence to obtain an alloy ingot;
(2) carrying out solid solution treatment on the alloy ingot obtained in the step (1) to obtain a solid solution alloy;
(3) cold rolling the solid solution state alloy obtained in the step (2) to obtain a rolled state alloy;
(4) and (4) carrying out aging treatment on the rolled alloy obtained in the step (3) to obtain the high-strength copper alloy.
6. The production method according to claim 5, wherein the temperature of the melting in the step (1) is 1170-1350 ℃.
7. The method according to claim 5, wherein the casting temperature in the step (1) is 1130 to 1250 ℃.
8. The preparation method according to claim 5, wherein the temperature of the solution treatment in the step (2) is 750-930 ℃, and the holding time of the solution treatment is 1-20 h.
9. The preparation method according to claim 5, wherein the cold rolling in the step (3) is multi-pass cold rolling, and the deformation amount of each pass of the cold rolling is 5-20%.
10. The preparation method according to claim 5, wherein the temperature of the aging treatment in the step (4) is 350-700 ℃, and the holding time of the aging treatment is 1-20 h.
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| CN114134364A (en) * | 2021-12-21 | 2022-03-04 | 有研工程技术研究院有限公司 | Copper alloy material and preparation method thereof |
| CN114196851A (en) * | 2021-12-20 | 2022-03-18 | 有研工程技术研究院有限公司 | High-strength conductive copper alloy material and preparation method thereof |
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Denomination of invention: A high-strength copper alloy and its preparation method Effective date of registration: 20230823 Granted publication date: 20230113 Pledgee: Agricultural Bank of China Limited Shaoxing Shangyu sub branch Pledgor: Zhejiang Weijing New Material Co.,Ltd. Registration number: Y2023330001823 |