CN108239709B - Elastic copper alloy, strip and strip thereof and composite heat treatment method - Google Patents
Elastic copper alloy, strip and strip thereof and composite heat treatment method Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- 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
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Abstract
The invention relates to an elastic copper alloy, a strip and a composite heat treatment method thereof, wherein the copper alloy comprises 1.1-1.4% or (1) 5.2-11.4% of Ni, 0.15-0.35% or 0-0.1% of Cr, 0.1-0.2% or (2) 1.2-1.4% of Co, 0.01-0.015% or 0.2-0.4% of Zr, 0.04-0.2% of Si, (3) 0.7-0.75% of Mg, 0.01-0.02% of L i, 0.1-0.5% of P, (4) 0.001-0.01% of Fe, 0.001-0.01% of Zn, 0.001-0.01% of Mn, and the balance Cu., wherein (1) and (2) are mutually exclusive, (3) and (4) the copper alloy has high fatigue resistance, high elasticity and high thermal resistance.
Description
Technical Field
The invention relates to an elastic copper alloy, a strip and a composite heat treatment method thereof, in particular to a high-performance elastic copper-nickel-silicon-cobalt alloy, a strip and a composite heat treatment method thereof.
Background
The high-performance elastic copper alloy has excellent elasticity and also has high strength, medium electric and heat conductivity and excellent high-temperature performance. The alloy material is mainly used as a lead frame, an elastic connector, an elastic component, an automobile connector, a sensor, a conductive bridge and other materials in the industries of power electronics, transportation, mobile phones, electricians, aerospace and the like.
The copper-based electronic connector material is widely used in the fields of instruments, meters and electronic components as a special elastic material, and with the development of various devices towards high reliability, miniaturization and long service life, higher requirements are put forward on the quality and variety of the material, for example, the requirements on the precision, surface quality, residual stress, stress relaxation resistance, impact shock resistance, weldability and the like of the material are extremely strict. The current copper alloy for the connector mainly comprises: brass, tin phosphor bronze, copper nickel silicon alloy, copper nickel tin alloy, copper nickel manganese alloy, beryllium bronze, titanium bronze, zinc white copper, iron phosphor bronze, copper chromium zirconium alloy, and the like. The properties of the material are as follows: the high-strength alloy, the medium-strength alloy and the low-cost brass, wherein the low-cost alloy is mainly common brass, and the medium-high grade elastic material is mainly precipitation strengthening type copper alloy, spinodal decomposition alloy and solid solution strengthening type copper alloy. The elastic copper-based alloy material is mainly used as a lead frame, a connector, a sensor, a conductive bridge and other materials in the industries of transportation, communication electronics, electrician power, aerospace and the like.
In recent years, with the development of industries such as electronic information, modern transportation, communication, electric power, electronics, aerospace and the like, more requirements are put forward on high-performance copper alloys, such as: high strength, electric and heat conductivity at room temperature and high temperature, good hardness, good deformation and processing capability, excellent surface quality, low residual stress and the like. The high-performance elastic copper alloy taking copper, nickel, silicon and cobalt as main elements has the advantages of high strength, high elasticity, high fatigue property, good heat resistance, high conductivity and stress relaxation resistance, and becomes a new generation of high-strength high-elasticity copper alloy. A search showed that U.S. patent No.6506269 discloses a copper alloy with controlled additions of either nickel, cobalt, silicon and magnesium or phosphorus. This patent describes treating copper alloys using either a high temperature process or a low temperature process. The properties obtained by the high temperature process do not achieve the targeted combination of strength and electrical conductivity described above. When processed using the high temperature method, the exemplary alloy is reported to have an electrical conductivity of 51.9% IACS and a tensile strength of 709 MPa; when processed using the low temperature method, the exemplary alloy had a conductivity of 51.5% IACS and a tensile strength of 905 MPa. However, the low temperature process imparts excessive cold work to the copper alloy, which is expected to result in poor formability strain and reduced stress relaxation resistance. Three patents (publication numbers of CN1671877A, CN101041868A and CN101792872A) related to cobalt, nickel and silicon-copper alloy are applied to China in 2003, 2007 and 2009 by the American Aolin company and the Viland factory stockpile company, and the change of performance caused by different content ratios of various cobalt and nickel elements is researched.
Disclosure of Invention
The invention mainly aims to provide a high-performance elastic copper alloy which has the advantages of high strength, high elasticity, high fatigue property, good heat resistance, high conductivity and stress relaxation resistance, and can meet the requirements of various industrial fields on copper-based elastic materials.
The high performance elastic copper alloy consists of Ni 1.1-1.4 wt%, Cr 0.15-0.35 wt% or 0-0.1 wt%, Co 0.1-0.2 wt% or 1.2-1.4 wt%, Zr 0.01-0.015 wt% or 0.2-0.4 wt%, Si 0.04-0.2 wt%, Mg 0.7-0.75 wt%, L i 0.01-0.02 wt%, P0.1-0.5 wt%, Zn 0.001-0.01 wt%, Mn 0.001-0.01 wt%, and Cu and other inevitable impurity for the rest.
The high performance elastic copper alloy consists of Ni 1.1-1.4 wt%, Cr 0.15-0.35 wt% or 0-0.1 wt%, Co 0.1-0.2 wt% or 1.2-1.4 wt%, Zr 0.01-0.015 wt% or 0.2-0.4 wt%, Si 0.04-0.2 wt%, L i 0.01-0.02 wt%, P0.1-0.5 wt%, Fe 0.001-0.01 wt%, Zn 0.001-0.01 wt%, Mn 0.001-0.01 wt%, and Cu and other inevitable impurity for the rest.
The high performance elastic copper alloy consists of Ni 5.2-11.4 wt%, Cr 0.15-0.35 wt% or 0-0.1 wt%, Co 0.1-0.2 wt%, Zr 0.01-0.015 wt% or 0.2-0.4 wt%, Si 0.04-0.2 wt%, Mg 0.7-0.75 wt%, L i 0.01-0.02 wt%, P0.1-0.5 wt%, Zn 0.001-0.01 wt%, Mn 0.001-0.01 wt%, and Cu and other inevitable impurity for the rest.
The high performance elastic copper alloy consists of Ni 5.2-11.4 wt%, Cr 0.15-0.35 wt% or 0-0.1 wt%, Co 0.1-0.2 wt%, Zr 0.01-0.015 wt% or 0.2-0.4 wt%, Si 0.04-0.2 wt%, L i 0.01-0.02 wt%, P0.1-0.5 wt%, Fe 0.001-0.01 wt%, Zn 0.001-0.01 wt%, Mn 0.001-0.01 wt%, and Cu and other inevitable impurity for the rest.
Because Cu and Ni are infinitely mutually soluble, excessive Ni can play a solid solution strengthening role in a matrix, when high cobalt content is adopted in the patent, a certain amount of Co precipitated phase exists, so that the Ni content is required to be reduced to below 1.4 percent to obtain high performance, and when the Co content is relatively low, the performance can be improved by adding high Ni content, so that a certain content proportion is required for obtaining excellent comprehensive performance. When having the Fe element in the patent composition, Fe can form the mesophase with P, can play the effect that improves the base member intensity after the exsolution, and when having the Mg element, Mg can be preferred to form the mesophase with P, can play the effect that improves the conductivity after the exsolution, but the very big damage electric conductivity of Fe that does not exsolution at this moment can be, consequently, need add Mg, Fe according to the requirement of difference.
The function of the added alloy elements is as follows:
nickel: the nickel element can play a role in solid solution strengthening, and the addition of the nickel element can also increase the heat-resisting temperature of the alloy.
Chromium, cobalt and zirconium elements: the addition of the three elements can mainly play a role in refining grains and improving the comprehensive performance of the alloy. When the three elements are added into the alloy together, the three elements have the interaction among the elements, so that the grains can be obviously refined and the alloy segregation can be reduced, and the effect is better than that of the single addition of the elements.
Silicon: the silicon, the nickel and the cobalt can form silicide second phase strengthening particles to improve the strength of the alloy, and silicide precipitated after the alloy is aged can improve the strength of the alloy to a certain extent.
Magnesium: the magnesium is added to improve the casting quality of the alloy, increase the fluidity of the alloy, preferentially form an intermediate phase with P, and improve the conductivity after desolventizing.
Lithium: the addition of lithium preferentially generates high-melting-point compounds in copper, and can improve the high-temperature plasticity of the alloy.
Phosphorus and manganese: phosphorus and manganese mainly play a role in deoxidation, and trace phosphorus elements can also form compounds with other alloys, so that the comprehensive performance of the alloy is improved.
Iron: the iron element can effectively adjust the size of the alloy grain structure, improve the uniformity of the structure and improve the stress corrosion resistance sensitivity of the alloy.
Zinc: the zinc element in the alloy mainly improves the solder dip permeability and the heat-resistant adhesion performance of the alloy.
Another object of the present invention is to provide an elastic copper alloy sheet strip made of the above high-performance elastic copper alloy and a composite heat treatment method thereof.
An elastic copper alloy plate strip is made of the high-performance elastic copper alloy, and the composite heat treatment method comprises the following steps: preparing an alloy ingot according to the components and weight percentage of the alloy, carrying out hot rolling or homogenization treatment on the alloy ingot, wherein the final rolling temperature of the hot rolling is more than 700 ℃ or the homogenization treatment temperature is more than 700 ℃, directly entering a water tank for subsequent processing after the hot rolling or homogenization treatment, and heating to the solid solution temperature T through a vertical annealing furnace when the alloy is rolled to 1.2-2 mm1Performing gas cooling; continuing processing, when the alloy is rolled to 0.02-0.06 mm, heating to a solid solution temperature T through a horizontal annealing furnace2Performing gas cooling; and performing aging treatment after 20-50% of cold deformation to obtain the elastic copper alloy plate strip.
Wherein the solid solution temperature T1And T2All are 850-1000 ℃; cooling the gas by adopting nitrogen, wherein the gas temperature is less than or equal to 20 ℃; the aging treatment temperature is 400-500 ℃, and the aging time is 2-8 h.
Compared with other elastic copper alloys, the high-performance elastic copper alloy disclosed by the invention is very excellent in strength, conductivity, elasticity, corrosion resistance and processability after composite heat treatment, has excellent stress relaxation resistance, can reach the performance indexes of strip yield strength of more than or equal to 880MPa, elastic modulus of more than or equal to 125GPa, conductivity of more than or equal to 45% IACS, stress relaxation of less than or equal to 3% at room temperature for 100h, width deflection of less than or equal to 0.03mm, roughness of less than or equal to 0.08 mu m and the like, and can be widely applied to various electronic elements such as electrical connectors, springs, connectors, switches, contacts and the like.
Detailed Description
The copper alloy comprises the main elements of 1.1-1.4% or (1) 5.2-11.4% of Ni, 0.15-0.35% or 0-0.1% of Cr, 0.1-0.2% or (2) 1.2-1.4% of Co, 0.01-0.015% or 0.2-0.4% of Zr, 0.04-0.2% of Si, (3) 0.7-0.75% of Mg, 0.01-0.02% of L i, 0.1-0.5% of P, (4) 0.001-0.01% of Fe, 0.001-0.01% of Zn, 0.001-0.01% of Mn, and the balance of Cu and other inevitable impurities, wherein (1) and (2) are mutually exclusive, and (3) and (4).
The composite heat treatment process of the high-performance elastic copper alloy plate strip comprises the following steps: when the prepared alloy ingot is subjected to hot rolling, the finishing temperature is kept above 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment above 700 ℃), the alloy ingot is directly put into a water tank, and when the alloy is rolled to 1.2-2 mm no matter what the subsequent processing process is, the alloy ingot is heated to the solid solution temperature T through a vertical annealing furnace1The alloy is rapidly cooled by gas (the temperature of the gas is less than or equal to 20 ℃) at 850-1000 ℃ according to the difference of components, and then is heated to the solid solution temperature T by a horizontal annealing furnace when the alloy is rolled to 0.02-0.06 mm no matter what the subsequent processing process is2The combination of the best performance of the alloy can be achieved by performing gas cooling (nitrogen, gas temperature is less than or equal to 20 ℃) rapidly (between 850 ℃ and 1000 ℃ according to the difference of components), performing 20-50% cold deformation, and performing aging treatment at the aging temperature of 400-500 ℃ for 2-8 h.
Example 1
After hot rolling, the prepared alloy ingot is kept at the finishing temperature of more than 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment at the temperature of more than 700 ℃), and directly enters a water tank for subsequent processing, when the alloy is rolled to 1.2mm, the alloy is heated to 850 ℃ through a vertical annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is continuously processed, when the alloy is rolled to 0.02mm, is heated to 1000 ℃ through a horizontal annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is subjected to 20% cold deformation, is subjected to aging treatment at the aging temperature of 500 ℃ for 2h, and has the components and the physical properties shown in table 1.
TABLE 1 alloy element mass percent and physical property
Example 2
After hot rolling, the prepared alloy ingot is kept at the finishing temperature of more than 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment at the temperature of more than 700 ℃), and directly enters a water tank for subsequent processing, when the alloy is rolled to 1.4mm, the alloy is heated to 900 ℃ through a vertical annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is continuously processed, when the alloy is rolled to 0.02mm, is heated to 850 ℃ through a horizontal annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is subjected to 30% cold deformation, and is subjected to aging treatment at the aging temperature of 400 ℃ for 4 hours, wherein the components and the physical properties of the alloy are shown in table 2.
TABLE 2 alloy element mass percent and physical properties
Example 3
After hot rolling, the prepared alloy ingot is kept at the finishing temperature of more than 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment at the temperature of more than 700 ℃), and directly enters a water tank for subsequent processing, when the alloy is rolled to 1.6mm, the alloy is heated to 950 ℃ through a vertical annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is continuously processed, when the alloy is rolled to 0.02mm, is heated to 900 ℃ through a horizontal annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is subjected to 40% cold deformation, and is subjected to aging treatment at the aging temperature of 420 ℃ for 5 hours, wherein the components and the physical properties of the alloy are shown in Table 3.
TABLE 3 alloy element mass percent and physical properties
Example 4
After hot rolling, the prepared alloy ingot is kept at the finishing temperature of more than 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment at the temperature of more than 700 ℃), and directly enters a water tank for subsequent processing, when the alloy is rolled to 1.8mm, the alloy is heated to 1000 ℃ through a vertical annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is continuously processed, when the alloy is rolled to 0.02mm, is heated to 950 ℃ through a horizontal annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is subjected to 50% cold deformation, is subjected to aging treatment at the aging temperature of 440 ℃ for 6 hours, and the components and the physical properties of the alloy are shown in table 4.
TABLE 4 alloy element mass percent and physical properties
Example 5
After hot rolling, the prepared alloy ingot is kept at the finishing temperature of more than 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment at the temperature of more than 700 ℃), and directly enters a water tank for subsequent processing, when the alloy is rolled to 2.0mm, the alloy is heated to 850 ℃ through a vertical annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is continuously processed, when the alloy is rolled to 0.03mm, is heated to 1000 ℃ through a horizontal annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is subjected to 20% cold deformation, is subjected to aging treatment at the aging temperature of 460 ℃ for 8 hours, and the components and the physical properties of the alloy are shown in Table 5.
TABLE 5 alloy element mass percent and physical properties
Example 6
After hot rolling, the prepared alloy ingot is kept at the finishing temperature of more than 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment at the temperature of more than 700 ℃), and directly enters a water tank for subsequent processing, when the alloy is rolled to 1.3mm, the alloy is heated to 875 ℃ through a vertical annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is continuously processed, when the alloy is rolled to 0.04mm, is heated to 850 ℃ through a horizontal annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is subjected to 25% cold deformation, is subjected to aging treatment at the aging temperature of 480 ℃ for 3 hours, and has the components and the physical properties as shown in table 6.
TABLE 6 alloy element mass percent and physical properties
Example 7
After hot rolling, the prepared alloy ingot is kept at the finishing temperature of more than 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment at the temperature of more than 700 ℃), and the alloy ingot directly enters a water tank for subsequent processing, when the alloy is rolled to 1.4mm, the alloy ingot is heated to 900 ℃ through a vertical annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is continuously processed, when the alloy is rolled to 0.05mm, is heated to 875 ℃ through a horizontal annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is subjected to 35% cold deformation, is subjected to aging treatment at the aging temperature of 500 ℃ for the aging time of 5 hours, and the components and the physical properties of the alloy are shown in Table 7.
TABLE 7 alloy element mass percent and physical properties
Example 8
After hot rolling, the prepared alloy ingot is kept at the finishing temperature of more than 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment at the temperature of more than 700 ℃), and directly enters a water tank for subsequent processing, when the alloy is rolled to 1.5mm, the alloy is heated to 925 ℃ through a vertical annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is continuously processed, when the alloy is rolled to 0.06mm, is heated to 900 ℃ through a horizontal annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is subjected to 45% cold deformation, and is subjected to aging treatment at the aging temperature of 425 ℃ for the aging time of 7 hours, wherein the components and the physical properties of the alloy are shown in Table 8.
TABLE 8 alloy element mass percent and physical properties
Example 9
After hot rolling, the prepared alloy ingot is kept at the finishing temperature of more than 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment at the temperature of more than 700 ℃), and directly enters a water tank for subsequent processing, when the alloy is rolled to 1.6mm, the alloy is heated to 950 ℃ through a vertical annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is continuously processed, when the alloy is rolled to 0.06mm, is heated to 925 ℃ through a horizontal annealing furnace, is rapidly subjected to gas cooling (nitrogen, the gas temperature is less than or equal to 20 ℃), is subjected to 50% cold deformation, is subjected to aging treatment at the aging temperature of 425 ℃ for 6 hours, and the components and the physical properties of the alloy are shown in table 9.
TABLE 9 alloy element mass percent and physical properties
Example 10
After the alloy ingot is subjected to hot rolling, the finishing temperature is kept above 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment above 700 ℃), the alloy ingot is directly put into a water tank for subsequent processing, when the alloy is rolled to 1.7mm, the alloy ingot is heated to 975 ℃ through a vertical annealing furnace, gas cooling is rapidly performed (nitrogen and the gas temperature is less than or equal to 20 ℃), then the alloy ingot is continuously processed, when the alloy is rolled to 0.06mm, the alloy ingot is heated to 925 ℃ through a horizontal annealing furnace, the gas cooling is rapidly performed (nitrogen and the gas temperature is less than or equal to 20 ℃), after 30% cold deformation, the aging treatment is performed at the aging temperature of 450 ℃ and the aging time of 6h, and the components and the physical properties of the alloy are shown in Table 10.
TABLE 10 alloy element mass percentages and physical properties
Example 11
After the alloy ingot is subjected to hot rolling, the finishing temperature is kept above 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment above 700 ℃), the alloy ingot directly enters a water tank for subsequent processing, when the alloy is rolled to 1.8mm, the alloy ingot is heated to 1000 ℃ through a vertical annealing furnace, gas cooling is rapidly performed (nitrogen gas, gas temperature is less than or equal to 20 ℃), then the alloy ingot is continuously processed, when the alloy is rolled to 0.03mm, the alloy ingot is heated to 950 ℃ through a horizontal annealing furnace, gas cooling is rapidly performed (nitrogen gas, gas temperature is less than or equal to 20 ℃), after 40% cold deformation, aging treatment with the aging temperature of 475 ℃ and the aging time of 8 hours is performed, and the components and the physical properties of the alloy are shown in Table 11.
TABLE 11 alloy element mass percentages and physical properties
Example 12
After the alloy ingot is subjected to hot rolling, the finishing temperature is kept above 700 ℃ (or the horizontal continuous casting ingot without hot rolling is subjected to homogenization treatment above 700 ℃), the alloy ingot directly enters a water tank for subsequent processing, when the alloy is rolled to 2.0mm, the alloy ingot is heated to 900 ℃ through a vertical annealing furnace, gas cooling is rapidly performed (nitrogen gas, the gas temperature is less than or equal to 20 ℃), then the alloy ingot is continuously processed, when the alloy is rolled to 0.05mm, the alloy ingot is heated to 850 ℃ through a horizontal annealing furnace, the gas cooling is rapidly performed (nitrogen gas, the gas temperature is less than or equal to 20 ℃), after 50% cold deformation, the aging treatment is performed at the aging temperature of 450 ℃ for 4h, and the components and the physical properties of the alloy are shown in Table 12.
TABLE 12 alloy element mass percent and physical properties
The copper alloy prepared by the invention has the characteristics of high strength, high elasticity, high fatigue resistance and good heat resistance, has excellent conductivity and stress relaxation resistance, and is mainly applied to various electronic components such as lead frames, elastic connectors, elastic components, automobile connectors, contact switches and the like.
Claims (7)
1. An elastic copper alloy is characterized in that the copper alloy comprises, by weight, 6.8% -11.4% of Ni, 0.15% -0.35% or 0% -0.1% of Cr, 0.1% -0.2% of Co, 0.01% -0.015% or 0.2% -0.4% of Zr, 0.04% -0.08% of Si, 0.7% -0.75% of Mg, 0.01% -0.02% of L i, 0.1% -0.5% of P, 0.001% -0.01% of Zn, 0.001% -0.01% of Mn and the balance of Cu.
2. An elastic copper alloy is characterized in that the copper alloy comprises, by weight, 6.8% -11.4% of Ni, 0.15% -0.35% or 0% -0.1% of Cr, 0.1% -0.2% of Co, 0.01% -0.015% or 0.2% -0.4% of Zr, 0.04% -0.08% of Si, 0.01% -0.02% of L i, 0.1% -0.5% of P, 0.001% -0.01% of Fe, 0.001% -0.01% of Zn, 0.001% -0.01% of Mn and the balance of Cu.
3. An elastic copper alloy plate strip is characterized in that: made of the resilient copper alloy of claim 1 or 2.
4. The composite heat treatment method of the elastic copper alloy sheet strip according to claim 3, comprising the steps of: preparing an alloy ingot according to the components and weight percentage of the alloy, carrying out hot rolling on the alloy ingot or carrying out homogenization treatment on the alloy ingot, wherein the final rolling temperature of the hot rolling is more than 700 ℃ or the homogenization treatment temperature is more than 700 ℃, directly entering a water tank for subsequent processing after the hot rolling or homogenization treatment, heating the alloy ingot to the solid solution temperature through a vertical annealing furnace when the alloy is rolled to 1.2-2 mm, and carrying out gas cooling; continuing processing, when the alloy is rolled to 0.02-0.06 mm, heating to the temperature above the solid solution temperature through a horizontal annealing furnace, and carrying out gas cooling; and performing aging treatment after 20-50% of cold deformation to obtain the elastic copper alloy plate strip.
5. The composite heat treatment method for the elastic copper alloy sheet strip according to claim 4, wherein: the solid solution temperature is 850-1000 ℃.
6. The composite heat treatment method for the elastic copper alloy sheet strip according to claim 4, wherein: and (3) cooling the gas by adopting nitrogen, wherein the gas temperature is less than or equal to 20 ℃.
7. The composite heat treatment method for the elastic copper alloy sheet strip according to claim 4, wherein: the aging treatment temperature is 400-500 ℃, and the aging time is 2-8 h.
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| CN102383002A (en) * | 2011-10-26 | 2012-03-21 | 云南新铜人实业有限公司 | Copper-based alloy for cable shielding |
| CN106103756A (en) * | 2014-03-25 | 2016-11-09 | 古河电气工业株式会社 | The manufacture method of copper alloy plate, connector and copper alloy plate |
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