CN115323216A - High-performance copper alloy strip and preparation method thereof - Google Patents
High-performance copper alloy strip and preparation method thereof Download PDFInfo
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- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 204
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 238000011282 treatment Methods 0.000 claims abstract description 114
- 238000005097 cold rolling Methods 0.000 claims abstract description 85
- 239000010949 copper Substances 0.000 claims abstract description 56
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 40
- 238000010791 quenching Methods 0.000 claims abstract description 34
- 230000000171 quenching effect Effects 0.000 claims abstract description 34
- 239000006104 solid solution Substances 0.000 claims abstract description 27
- 229910052742 iron Inorganic materials 0.000 claims abstract description 25
- 239000012535 impurity Substances 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims description 66
- 230000032683 aging Effects 0.000 claims description 46
- 238000005266 casting Methods 0.000 claims description 43
- 229910052802 copper Inorganic materials 0.000 claims description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 34
- 230000008018 melting Effects 0.000 claims description 33
- 238000002844 melting Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 32
- 239000000956 alloy Substances 0.000 claims description 31
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 27
- 229910052760 oxygen Inorganic materials 0.000 claims description 27
- 239000001301 oxygen Substances 0.000 claims description 27
- 229910045601 alloy Inorganic materials 0.000 claims description 26
- 229910052726 zirconium Inorganic materials 0.000 claims description 26
- 238000005098 hot rolling Methods 0.000 claims description 25
- 239000000243 solution Substances 0.000 claims description 24
- 238000000137 annealing Methods 0.000 claims description 22
- 238000005275 alloying Methods 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 230000006698 induction Effects 0.000 claims description 18
- 229910052746 lanthanum Inorganic materials 0.000 claims description 17
- 238000003723 Smelting Methods 0.000 claims description 16
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- 239000000203 mixture Substances 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 14
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- 229910052684 Cerium Inorganic materials 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910017813 Cu—Cr Inorganic materials 0.000 claims description 6
- 229910017945 Cu—Ti Inorganic materials 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 229910052718 tin Inorganic materials 0.000 claims description 5
- 150000002739 metals Chemical class 0.000 claims description 4
- 229910017827 Cu—Fe Inorganic materials 0.000 claims description 3
- 229910017888 Cu—P Inorganic materials 0.000 claims description 3
- 229910017985 Cu—Zr Inorganic materials 0.000 claims description 3
- 238000005530 etching Methods 0.000 abstract description 7
- 238000004080 punching Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 2
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- 238000007872 degassing Methods 0.000 description 7
- 229910017526 Cu-Cr-Zr Inorganic materials 0.000 description 6
- 229910017810 Cu—Cr—Zr Inorganic materials 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000003870 refractory metal Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
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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
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- 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
- C22F1/08—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 high-performance copper alloy strip, which comprises the following components in percentage by mass: 0.2 to 0.7 percent of Cr, 0.02 to 0.1 percent of ZrC, 0.05 to 0.2 percent of Mg, 0.05 to 0.2 percent of Fe, 0.02 to 0.06 percent of P, 0.02 to 0.1 percent of Ti, and the balance of Cu and inevitable impurity elements. The preparation method of the copper alloy strip is characterized in that elements such as Cr, zr, mg, fe, P and Ti are added, a two-step melt treatment technology is adopted, the large-deformation cold rolling with the deformation amount of more than or equal to 85% before solid solution is combined with online solid solution quenching treatment, the average grain size of a strip blank in three directions of RD, TD and ND is controlled to be less than or equal to 10 mu m, the maximum deviation of the grain sizes of three dimensions is controlled to be less than or equal to 50%, a uniform internal structure with small grain size is obtained, and the prepared copper alloy strip product has excellent punching and etching performances.
Description
Technical Field
The invention belongs to the technical field of copper alloy processing, and particularly relates to a high-performance copper alloy strip and a preparation method thereof.
Background
With the rapid development of the high-technology fields such as microelectronics, communication, traffic, aerospace, aviation and the like and the development direction of high integration, miniaturization and thin wall of electronic components, the transmission quantity and the heat productivity of the electronic components are greatly increased, so that a copper alloy material with higher performance is required, the copper alloy material has enough strength to meet the requirement of strength support after the thickness is reduced, and also has high electric conduction and heat conduction performance, joule heat is difficult to generate during electrification, and the generated heat is easy to dissipate. Meanwhile, the copper alloy material is also required to have higher heat resistance so as to ensure that the copper alloy material is not softened at high temperature; the punching performance or the etching performance required by preparation modes such as punching or etching and the like is met. There is an urgent need in the market for alloy materials having a strength of up to about 600MPa, while having an electrical conductivity greater than 80% IACS. The Cu-Cr-Zr alloy is an ideal material for meeting the performances, but because Zr element is easy to oxidize and burn, the large-size square ingot is difficult to prepare under the non-vacuum condition, which limits the wide application of the Cu-Cr-Zr alloy on the increasingly miniaturized electronic components.
The market demands a Cu-Cr-Zr alloy strip with high performance and good preparation performance. In order to reduce the problem of preparation difficulty of the Cu-Cr-Zr alloy under the non-vacuum condition, avoid Zr loss in a furnace, semi-continuous casting melt transfer and Zr loss of melt in a crystallizer during the smelting and casting processes of the Cu-Cr-Zr alloy as far as possible, and ensure the stability of Zr in the full-length range of ingot casting, a plurality of domestic organizations develop related researches. It is common practice to protect the melt with a covering agent or an inert gas, as in patents CN101531149B, CN101613808B, CN101618445B, CN106735003B, CN107586975B, CN108526422A, etc. These methods have certain protection effect, but because the continuous casting process lasts for a long time and oxygen is introduced into raw materials in the continuous casting material-supplementing process, the oxygen content in the melt can still be continuously increased, so that the yield of Zr is generally lower than 50%. In patents CN107287468B and CN108526422A, the Zr content is replaced or reduced by adding common elements such as Mg, si and the like with low price, and in CN103966475B and CN108277378B, ti and Ag are respectively used for replacing Zr, but the excellent comprehensive performance of Cu-Cr-Zr alloy is difficult to reach completely. The patent CN111411255B adds a trace amount of Al, ti, si, B and other elements, alloy elements are uniformly and fixedly dissolved in a copper melt during casting, floating burning loss caused by excessive elements is avoided, the preparation difficulty under a non-vacuum condition is reduced, and the yield of the elements is improved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-performance copper alloy strip with high strength, high electric and heat conductivity, high heat resistance and punching and etching performance and a preparation method thereof.
The invention adopts the following technical scheme:
the high-performance copper alloy strip is characterized by comprising the following components in percentage by mass: 0.2 to 0.7 percent of Cr, 0.02 to 0.1 percent of Zr, 0.05 to 0.2 percent of Mg, 0.05 to 0.2 percent of Fe, 0.02 to 0.06 percent of P, 0.02 to 0.1 percent of Ti, and the balance of Cu and inevitable impurity elements.
The high-performance copper alloy strip is characterized by comprising the following components in percentage by mass: 0.3 to 0.6 percent of Cr, 0.04 to 0.08 percent of Zr, 0.08 to 0.15 percent of Mg, 0.08 to 0.15 percent of Fe, 0.02 to 0.06 percent of P, 0.02 to 0.06 percent of Ti0.02 to 0.06 percent of Ti, and the balance of Cu and inevitable impurity elements.
The high-performance copper alloy strip is characterized by further comprising M, wherein the mass percentage of M is less than 0.5%; wherein M is one or more of La, ce, sn, zn, ni and Si, the mass percent of La is 0.02-0.04%, the mass percent of Ce is 0.02-0.04%, the mass percent of Sn is 0.02-0.2%, the mass percent of Zn is 0.02-0.2%, the mass percent of Ni is 0.02-0.2%, and the mass percent of Si is 0.02-0.2%.
The high-performance copper alloy strip is characterized in that the tensile strength of the copper alloy strip reaches 595-640 MPa, the elongation reaches 2-5%, the conductivity reaches 80-85% IACS, and the softening temperature reaches 550-565 ℃.
The preparation method of the high-performance copper alloy strip is characterized by comprising the following steps of:
(1) Cr, zr, mg, fe, P and Ti in the components of the copper alloy strip are respectively added in the form of intermediate alloys of Cu-Cr, cu-Zr, cu-Mg, cu-Fe, cu-P and Cu-Ti, raw materials of Cu, cu-Cr, cu-Zr, cu-Mg, cu-Fe, cu-P, cu-Ti and M are prepared according to the components and the mass percentage of the components of the copper alloy strip, and M is one or more of La, ce, sn, zn, ni and Si, and the raw materials are dried and foreign matter is removed;
(2) After a raw material Cu is filled into an induction melting device for melting, adding other raw materials in the step (1) to obtain a copper alloy melt;
(3) Casting the copper alloy melt to obtain a copper alloy casting blank; the casting temperature is 1150-1280 ℃;
(4) Carrying out heating hot rolling and on-line quenching on the copper alloy casting blank to obtain a copper alloy hot rolled strip blank; the heating hot rolling temperature is 900 ℃ to 960 ℃, the heat preservation time is 2h to 5h, and the online quenching temperature is 700 ℃ to 800 ℃;
(5) Carrying out surface milling and cold rolling on the copper alloy hot-rolled strip blank to obtain a copper alloy cold-rolled strip blank; the total cold rolling deformation is more than or equal to 85 percent;
(6) Carrying out online solution quenching treatment on the copper alloy cold-rolled strip blank to obtain a copper alloy solution strip blank;
(7) Carrying out cold rolling and aging treatment on the copper alloy solid solution strip blank to obtain a copper alloy strip blank;
(8) And carrying out tension annealing and stretch bending straightening treatment on the copper alloy strip blank to obtain a copper alloy strip finished product.
The preparation method of the high-performance copper alloy strip is characterized in that in the step (1), the raw material Cu is industrial pure copper; the smelting device in the step (2) is a non-vacuum induction smelting device; when the raw material M is added in the step (2), la and Ce are respectively added in the form of Cu-La and Cu-Ce intermediate alloys, and Sn, zn, ni and Si are added in the form of pure metals; in the step (6), the average grain size of the copper alloy solid solution strip in the rolling direction, the transverse direction and the normal direction of the rolling surface is less than or equal to 10 mu m, and the maximum deviation of the grain sizes in the rolling direction, the transverse direction and the normal direction of the rolling surface is less than or equal to 50 percent.
The preparation method of the high-performance copper alloy strip is characterized in that in the step (2), the raw material Cu is put into an induction melting device to be melted, and then the first melt treatment and the deoxidation and impurity removal are sequentially carried out to obtain the copper melt after the impurity removal; adding raw materials Cu-Cr and Cu-Fe into the copper melt after impurity removal, and then carrying out primary alloying to obtain an intermediate melt added with Cr and Fe; when the raw material M needs to be added, adding the raw materials M, cu-Mg and Cu-P into the intermediate melt added with Cr and Fe for second melt treatment to obtain the intermediate melt added with Cr, fe, mg and P; adding the raw materials Cu-Zr and Cu-Ti into the intermediate melt added with Cr, fe, mg and P for secondary alloying to obtain the copper alloy melt.
The preparation method of the high-performance copper alloy strip is characterized in that the copper alloy solid solution strip is subjected to primary cold rolling in the step (7) to obtain a strip after the primary cold rolling, and the deformation of the primary cold rolling is 50-80%; carrying out primary aging treatment on the strip blank subjected to primary cold rolling to obtain a strip subjected to primary aging treatment, wherein the temperature of the primary aging treatment is 400-550 ℃, and the time is 2-8 h; and sequentially carrying out secondary cold rolling, secondary aging treatment and third cold rolling on the strip subjected to the primary aging treatment to obtain a copper alloy strip blank, wherein the secondary cold rolling has the deformation of 30-70%, the third cold rolling has the deformation of 20-60%, the secondary aging treatment has the temperature of 400-480 ℃ and the time of 2-4 h.
The preparation method of the high-performance copper alloy strip is characterized in that the temperature of the online solution quenching treatment in the step (6) is 800-980 ℃ and the time is 1-5 min; the process conditions for carrying out tension annealing on the copper alloy strip blank in the step (8) are as follows: and (3) carrying out low-temperature tension annealing on the copper alloy strip blank at the temperature of 300-450 ℃ for 30-200 seconds.
The preparation method of the high-performance copper alloy strip is characterized in that in the step (2), the raw material Cu is put into an induction melting device to be melted, and then is subjected to primary melt treatment and deoxidation impurity removal in sequence, one or two of charcoal, flake graphite and inert gas are adopted to perform deoxidation impurity removal, and the oxygen content in the copper melt after impurity removal is reduced to below 50 ppm; the oxygen content in the intermediate melt added with Cr, fe, mg and P is reduced to below 30 ppm.
Compared with the prior art, the invention has the following beneficial technical effects:
(1) The stability and the uniformity of the Zr element under the non-vacuum condition are facilitated: the two-step melt treatment method adopted in the smelting process effectively reduces the oxygen content in the melt, avoids the oxidation loss of the added Zr element, and is beneficial to the stability and uniformity of the Zr element under the non-vacuum condition. Performing first melt treatment, namely deoxidizing and degassing by adopting one or two of charcoal, crystalline flake graphite and inert gas to reduce the oxygen content to below 50 ppm; the second melt treatment adopts element deoxidation, and the oxygen content in the melt is further reduced by adding elements such as Mg, P, rare earth (La, ce) and the like, so that the oxygen content is reduced to be below 30 ppm.
(2) Taking account of alloy strength, conductivity and heat resistance: the invention maintains higher Cr and Zr contents, and can ensure the alloy strength; and further adding Mg, ti, fe, P and other elements to improve the non-vacuum smelting difficulty and raise the strength and heat resistance of the alloy while lowering the conductivity slightly, and the prepared copper alloy strip has tensile strength of 595-640 MPa, elongation of 2-5%, conductivity of 80-85% IACS and softening temperature of 550-565 deg.c.
(3) And (3) regulating and controlling the grain size and the grain uniformity: according to the invention, large-deformation cold rolling with the deformation amount of more than or equal to 85% is carried out before solid solution, online solid solution quenching treatment is carried out for 1-5 minutes at the heating temperature of 800-980 ℃, recrystallization nucleation and growth inside a strip are controlled, and small and uniform internal structures of crystal grains are obtained by controlling the average crystal grain size of the strip in the three directions of Rolling Direction (RD), transverse Direction (TD) and rolling surface Normal Direction (ND) to be less than or equal to 10 mu m and the maximum deviation of the three-dimensional crystal grain sizes to be less than or equal to 50%, which is beneficial to the improvement of alloy comprehensive performance and residual stress control.
(4) Excellent punching and etching properties: according to the invention, by adding alloy elements such as Mg, fe, P and Ti, the comprehensive properties such as strength, conductivity and heat resistance of the alloy are obviously considered, and the regulation and control of solid solution on the grain size and the grain size deviation are combined, so that the uniformity of the overall performance of the strip is beneficially realized, the deformation coordination in the processing process is enhanced, the residual stress of the strip is reduced, and the buckling deformation of the strip after punching or etching is reduced.
The method is suitable for non-vacuum preparation, and the product prepared by the method has high strength, high electric and heat conductivity, high heat resistance and punching and etching performance, and can be used for elements such as a lead frame of a very large-scale integrated circuit and a miniaturized electronic communication connector, a terminal, a relay and the like.
Drawings
FIG. 1 is a process scheme of the process of the present invention.
Detailed Description
The invention relates to a high-performance copper alloy strip which comprises the following components in percentage by mass: 0.2 to 0.7 percent of Cr, 0.02 to 0.1 percent of Zr, 0.05 to 0.2 percent of Mg, 0.05 to 0.2 percent of Fe, 0.02 to 0.06 percent of P, 0.02 to 0.1 percent of Ti, and the balance of Cu and inevitable impurity elements. Preferably, the copper alloy strip comprises the following components in percentage by mass: 0.3 to 0.6 percent of Cr, 0.04 to 0.08 percent of Zr, 0.08 to 0.15 percent of Mg, 0.08 to 0.15 percent of Fe, 0.02 to 0.06 percent of P, 0.02 to 0.06 percent of Ti, and the balance of Cu and inevitable impurity elements. The copper alloy strip also comprises M, wherein the mass percentage of M is less than 0.5%; wherein M is one or more of La, ce, sn, zn, ni and Si, the mass percent of La is 0.02-0.04%, the mass percent of Ce is 0.02-0.04%, the mass percent of Sn is 0.02-0.2%, the mass percent of Zn is 0.02-0.2%, the mass percent of Ni is 0.02-0.2%, and the mass percent of Si is 0.02-0.2%. The tensile strength of the copper alloy strip reaches 595MPa to 640MPa, the elongation reaches 2 percent to 5 percent, the conductivity reaches 80 percent to 85 percent IACS, and the softening temperature reaches 550 ℃ to 565 ℃.
Referring to fig. 1, the method for preparing the high-performance copper alloy strip of the present invention comprises the following steps:
(1) Preparing materials: cr, zr, mg, fe, P and Ti in the components of the copper alloy strip are added in the form of intermediate alloys of Cu-Cr, cu-Zr, cu-Mg, cu-Fe, cu-P and Cu-Ti respectively, and drying and foreign matter removal treatment are needed before the addition. Preparing raw materials of Cu, cu-Cr, cu-Zr, cu-Mg, cu-Fe, cu-P, cu-Ti and M according to the components and the mass percentage of the copper alloy strip, wherein M is one or more of La, ce, sn, zn, ni and Si, and drying and removing foreign matters from the raw materials; the raw material Cu is industrial pure copper.
(2) Smelting: and (2) after the raw material Cu is filled into an induction melting device for melting, adding other raw materials in the step (1) to obtain a copper alloy melt. The smelting device is a non-vacuum induction smelting device.
The preparation process of the copper alloy melt comprises two melt treatments and two alloying, and comprises the following specific steps: loading raw material Cu into an induction melting device for melting, and then sequentially carrying out first melt treatment and deoxidation and impurity removal to obtain an impurity-removed copper melt; adding Cr, fe and other non-easily-consumed refractory metal elements into the copper melt subjected to impurity removal in the form of raw materials Cu-Cr and Cu-Fe, and then carrying out first alloying to obtain an intermediate melt added with Cr and Fe; determining whether a converter is needed according to the actual equipment condition, wherein the converter mode generally comprises submerged converter and a conventional dumping converter; and (3) transferring the melt into a heat preservation furnace, performing secondary melt treatment, and further reducing the oxygen content in the melt by adding elements such as Mg, P and the like: when the raw material M needs to be added, adding the raw materials M, cu-Mg and Cu-P into the intermediate melt added with Cr and Fe for second melt treatment to obtain the intermediate melt added with Cr, fe, mg and P; finally, alloying of Zr and Ti elements which are easy to oxidize and lose: adding the raw materials Cu-Zr and Cu-Ti into the intermediate melt added with Cr, fe, mg and P for second alloying to obtain the copper alloy melt. When the raw material M is added, la and Ce are respectively added in the form of Cu-La and Cu-Ce intermediate alloys, and Sn, zn, ni and Si are added in the form of pure metals.
Loading raw material Cu into an induction melting device for melting, sequentially carrying out first melt treatment and deoxidation impurity removal, and carrying out deoxidation impurity removal by adopting one or two of charcoal, crystalline flake graphite and inert gas, wherein the oxygen content in the copper melt after impurity removal is reduced to below 50 ppm; the oxygen content in the melt is further reduced by adding elements such as Mg, P, rare earth (La, ce) and the like, and the oxygen content in the intermediate melt added with Cr, fe, mg and P is reduced to be below 30 ppm.
(3) Casting: casting the copper alloy melt to obtain a copper alloy casting blank; the casting temperature is 1150-1280 ℃.
(4) Hot rolling: carrying out heating hot rolling and on-line quenching on the copper alloy casting blank to obtain a copper alloy hot rolled strip blank; the heating hot rolling temperature is 900-960 ℃, the heat preservation time is 2-5 h, and the online quenching temperature is 700-800 ℃.
(5) Cold rolling: carrying out surface milling and cold rolling on the copper alloy hot-rolled strip blank to obtain a copper alloy cold-rolled strip blank; the total cold rolling deformation is more than or equal to 85 percent.
(6) Solid solution: carrying out online solution quenching treatment on the copper alloy cold-rolled strip blank to obtain a copper alloy solution strip blank; the temperature of the online solution quenching treatment is 800-980 ℃ and the time is 1-5 min; the average grain size of the copper alloy solid solution strip blank in the rolling direction, the transverse direction and the normal direction of a rolling surface is less than or equal to 10 mu m, and the maximum deviation of the grain sizes in the rolling direction, the transverse direction and the normal direction of the rolling surface is less than or equal to 50 percent.
(7) Deformation-heat treatment: carrying out cold rolling and aging treatment on the copper alloy solid solution strip blank to obtain a copper alloy strip blank meeting the requirements of the performance and thickness specification of a finished product; the cold rolling and aging treatment comprises the following specific steps: carrying out primary cold rolling on the copper alloy solid solution strip blank to obtain a strip blank after the primary cold rolling, wherein the deformation of the primary cold rolling is 50-80%; carrying out primary aging treatment on the strip blank subjected to the primary cold rolling to obtain a strip subjected to the primary aging treatment, wherein the temperature of the primary aging treatment is 400-550 ℃, and the time is 2-8 h; and (3) sequentially carrying out secondary cold rolling, secondary aging treatment and third cold rolling on the strip subjected to the primary aging treatment to obtain a copper alloy strip blank, wherein the secondary cold rolling has the deformation of 30-70%, the third cold rolling has the deformation of 20-60%, the secondary aging treatment has the temperature of 400-480 ℃ and the time of 2-4 h.
(8) Stress relief treatment: the stress relief treatment comprises low-temperature tension annealing and stretch bending straightening treatment. And carrying out tension annealing and stretch bending straightening treatment on the copper alloy strip blank to obtain a copper alloy strip finished product. The process conditions for carrying out tension annealing on the copper alloy strip blank are as follows: and (3) carrying out low-temperature tension annealing on the copper alloy strip blank at the temperature of 300-450 ℃ for 30-200 seconds.
The following examples are provided to explain the present invention in detail.
Example 1
(1) Preparing materials: preparing raw materials according to the composition requirements of the copper alloy strip, using main raw materials of industrial pure copper and the intermediate alloys Cu-10wt% Cr, cu-15wt% Zr, cu-10wt% Mg, cu-10wt% Fe, cu-15wt% Ti and Cu-14wt% P; other raw materials used were Cu-10wt% La and pure metal Sn; and all raw materials are correspondingly dried and treated for removing foreign matters.
The composition of the copper alloy strip of example 1 and its content are shown in table 1.
(2) Smelting: the method comprises the following steps of putting raw material industrial pure copper into an induction melting furnace for melting, and carrying out two-step melt treatment on a melt, wherein the method comprises the following specific steps: melting copper, performing first melt treatment, and deoxidizing and degassing by adopting two combination modes of charcoal covering and inert gas introduction into the melt to reduce the oxygen content to 47ppm; further performing first alloying, adding Cu-10wt% of non-consumable metal elements such as Cr, cu-10wt% of Fe and metal Sn; converter the melt potential to a holding furnace, performing a second melt treatment, further reducing the oxygen content in the melt to 28ppm by adding Cu-10wt% Mg, cu-14wt% P and Cu-10wt% La; finally, the second alloying is carried out, cu-15wt% of Zr and Cu-15wt% of Ti are dispersedly added, and the components are adjusted to obtain the desired copper alloy melt.
(3) Casting: and (3) casting the copper alloy melt obtained in the step (2) at the casting temperature of 1170 ℃ to obtain a copper alloy casting blank with the specification of 210 x 620 mm.
(4) Hot rolling: and (4) carrying out hot rolling and on-line quenching on the copper alloy casting blank obtained in the step (3), wherein the hot rolling heating temperature is 900 ℃, the heat preservation time is 2 hours, and the on-line quenching temperature is 705 ℃, so that a copper alloy hot rolled strip blank with the thickness of 15mm is obtained.
(5) Cold rolling: and (5) performing face milling and cold rolling on the copper alloy hot rolled strip blank obtained in the step (4), wherein the total cold rolling deformation is 88%, and obtaining the copper alloy cold rolled strip blank with the thickness of 1.7 mm.
(6) Solid solution: and (3) carrying out online solution quenching treatment on the copper alloy cold-rolled strip obtained in the step (5) at the heating temperature of 800 ℃ for 5 minutes, wherein the average grain sizes of the strip after the solution treatment in three directions of RD, TD and ND are respectively 6.6 mu m, 7.8 mu m and 9.6 mu m, and the maximum deviation of the grain sizes in three dimensions is 45%.
(7) Deformation-heat treatment: carrying out primary cold rolling on the copper alloy solid solution strip blank obtained in the step (6), wherein the cold rolling deformation is 80%, and carrying out primary aging treatment on the strip blank subjected to the primary cold rolling at the temperature of 400 ℃ for 8 hours; carrying out secondary cold rolling on the strip subjected to the primary aging treatment, wherein the deformation amount is 30%, and then carrying out secondary aging treatment, wherein the temperature is 400 ℃ and the time is 2h; and (5) carrying out cold rolling for three times on the strip billet after the secondary aging, wherein the deformation is 50%, and obtaining the copper alloy strip billet with the thickness of 0.127 mm.
(8) Stress relief treatment: and (4) carrying out low-temperature tension annealing, stretch bending straightening and other treatments on the copper alloy strip blank obtained in the step (7), carrying out low-temperature tension annealing on the copper alloy strip blank for 180 seconds at the heating temperature of 300 ℃, and carrying out stretch bending straightening on the annealed strip to obtain a high-performance copper alloy strip finished product. The main preparation process parameters adopted in example 1 are shown in table 2, and the properties of the high-performance copper alloy strip finished product obtained in example 1 are shown in table 3.
Example 2
(1) Preparing materials: preparing raw materials according to the composition requirements of the copper alloy strip, using main raw materials of industrially pure copper and the intermediate alloy Cu-10wt% Cr, cu-15wt% Zr, cu-10wt% Mg, cu-10wt% Fe, cu-15wt% Ti and Cu-14wt% P; the other raw materials used were Cu-10wt% Ce and pure metal Si; and all raw materials are correspondingly dried and treated for removing foreign matters. The composition of the copper alloy strip of example 2 and its content are shown in table 1.
(2) Smelting: the method comprises the following steps of putting raw material industrial pure copper into an induction melting furnace for melting, and carrying out two-step melt treatment on a melt, wherein the method comprises the following specific steps: melting copper, performing first melt treatment, and performing combined deoxidation and degassing by using two modes of flake graphite covering and inert gas introduction in the melt to reduce the oxygen content to 40ppm; further performing the first alloying 1, adding Cu-10wt% of Cr, cu-10wt% of Fe, metal Si and other non-easily-consumed refractory metal elements; tipping the melt to the holding furnace, performing a second melt treatment, further reducing the oxygen content in the melt to 22ppm by adding Cu-10wt% Mg, cu-14wt% P and Cu-10wt% Ce; finally, second alloying, dispersing and adding Cu-15wt% Zr and Cu-15wt% Ti, adjusting the components to obtain the desired copper alloy melt.
(3) Casting: and (3) casting the copper alloy melt obtained in the step (2) at 1210 ℃ to obtain a copper alloy casting blank with the specification of 210 x 620 mm.
(4) Hot rolling: and (4) carrying out hot rolling and on-line quenching on the copper alloy casting blank obtained in the step (3), wherein the hot rolling heating temperature is 920 ℃, the heat preservation time is 3h, and the on-line quenching temperature is 708 ℃, so that a copper alloy hot rolled strip blank with the thickness of 15mm is obtained.
(5) Cold rolling: and (5) performing face milling and cold rolling on the copper alloy hot rolled strip blank obtained in the step (4), wherein the total cold rolling deformation is 90%, and obtaining the copper alloy cold rolled strip blank with the thickness of 1.4 mm.
(6) Solid solution: and (4) carrying out online solution quenching treatment on the copper alloy cold-rolled strip obtained in the step (5) at a heating temperature of 850 ℃ for 4 minutes, wherein the average grain sizes of the strip after the solution treatment in three directions of RD, TD and ND are respectively 6.7 mu m, 7.5 mu m and 8.9 mu m, and the maximum deviation of the grain sizes in three dimensions is 33%.
(7) Deformation-heat treatment: carrying out primary cold rolling on the copper alloy solid solution strip blank obtained in the step (6), wherein the cold rolling deformation is 70%, and carrying out primary aging treatment on the strip blank subjected to the primary cold rolling at the temperature of 450 ℃ for 6 hours; carrying out secondary cold rolling on the strip subjected to the primary aging treatment, wherein the deformation is 50%, and then carrying out secondary aging treatment at the temperature of 420 ℃ for 4 hours; and (4) carrying out cold rolling for three times on the strip after secondary aging, wherein the deformation is 37%, and obtaining the copper alloy strip with the thickness of 0.127 mm.
(8) Stress relief treatment: and (4) carrying out low-temperature tension annealing, stretch bending straightening and other treatments on the copper alloy strip blank obtained in the step (7), carrying out low-temperature tension annealing on the copper alloy strip blank for 120 seconds at the heating temperature of 350 ℃, and carrying out stretch bending straightening on the annealed strip to obtain a high-performance copper alloy strip finished product. The main preparation process parameters adopted in example 2 are shown in table 2, and the properties of the high-performance copper alloy strip finished product obtained in example 2 are shown in table 3.
Example 3
(1) Preparing materials: preparing raw materials according to the composition requirements of the copper alloy strip, using main raw materials of industrial pure copper and the intermediate alloys Cu-10wt% Cr, cu-15wt% Zr, cu-10wt% Mg, cu-10wt% Fe, cu-15wt% Ti and Cu-14wt% P; other adopted raw materials are pure metal Ni and Si; and all raw materials are correspondingly dried and treated for removing foreign matters. The composition of the copper alloy strip of example 3 and its content are shown in table 1.
(2) Smelting: the method comprises the following steps of putting raw material industrial pure copper into an induction melting furnace for melting, and carrying out two-step melt treatment on a melt, wherein the method comprises the following specific steps: melting copper, performing first melt treatment, and deoxidizing and degassing by adopting two combination modes of charcoal covering and inert gas introduction into the melt to reduce the oxygen content to 35ppm; further performing a first alloying, adding Cu-10wt% Cr, cu-10wt% Fe and non-easily-consumable refractory metal elements such as metals Ni and Si; converter the melt latent liquor to a holding furnace, perform a second melt treatment, further reduce the oxygen content in the melt to 18ppm by adding Cu-10wt% Mg and Cu-14wt% per; finally, the second alloying is carried out, cu-15wt% of Zr and Cu-15wt% of Ti are dispersedly added, and the components are adjusted to obtain the desired copper alloy melt.
(3) Casting: and (3) casting the copper alloy melt obtained in the step (2) at the casting temperature of 1230 ℃ to obtain a copper alloy casting blank with the specification of 210 x 620 mm.
(4) Hot rolling: and (4) carrying out hot rolling and on-line quenching on the copper alloy casting blank obtained in the step (3), wherein the hot rolling heating temperature is 930 ℃, the heat preservation time is 4 hours, and the on-line quenching temperature is 712 ℃, so that a copper alloy hot rolled strip blank with the thickness of 15mm is obtained.
(5) Cold rolling: and (4) performing surface milling and cold rolling on the copper alloy hot rolled strip blank obtained in the step (4), wherein the total cold rolling deformation is 92%, and obtaining the copper alloy cold rolled strip blank with the thickness of 1.1 mm.
(6) Solid solution: and (3) carrying out online solution quenching treatment on the copper alloy cold-rolled strip obtained in the step (5) at the heating temperature of 900 ℃ for 3 minutes, wherein the average grain sizes of the strip after the solution treatment in three directions of RD, TD and ND are 5.8 mu m, 6.6 mu m and 7.8 mu m respectively, and the maximum deviation of the grain sizes in three dimensions is 34%.
(7) Deformation-heat treatment: carrying out primary cold rolling on the copper alloy solid solution strip blank obtained in the step (6), wherein the cold rolling deformation is 60%, and carrying out primary aging treatment on the strip blank subjected to the primary cold rolling at 480 ℃ for 5 hours; carrying out secondary cold rolling on the strip subjected to the primary aging treatment, wherein the deformation is 40%, and then carrying out secondary aging treatment at the temperature of 450 ℃ for 3h; and (5) carrying out cold rolling for three times on the strip billet after the secondary aging, wherein the deformation is 50%, and obtaining the copper alloy strip billet with the thickness of 0.127 mm.
(8) Stress relief treatment: and (4) carrying out low-temperature tension annealing, stretch bending straightening and other treatments on the copper alloy strip blank obtained in the step (7), carrying out low-temperature tension annealing on the copper alloy strip blank for 80 seconds at the heating temperature of 400 ℃, and carrying out stretch bending straightening on the annealed strip to obtain a high-performance copper alloy strip finished product. The main preparation process parameters adopted in example 3 are shown in table 2, and the properties of the high-performance copper alloy strip finished product obtained in example 3 are shown in table 3.
Example 4
(1) Preparing materials: preparing raw materials according to the composition requirements of the copper alloy strip, using main raw materials of industrially pure copper and the intermediate alloy Cu-10wt% Cr, cu-15wt% Zr, cu-10wt% Mg, cu-10wt% Fe, cu-15wt% Ti and Cu-14wt% P; adopting other raw materials as pure metal Zn; and all raw materials are correspondingly dried and treated for removing foreign matters. The composition of the copper alloy strip of example 4 and its content are shown in table 1.
(2) Smelting: the method comprises the following steps of putting raw material industrial pure copper into an induction melting furnace for melting, and carrying out two-step melt treatment on a melt, wherein the method comprises the following specific steps: melting copper, performing first melt treatment, deoxidizing and degassing by adopting a combination mode of flake graphite covering and inert gas introduction into the melt, and reducing the oxygen content to 38ppm; further performing a first alloying, adding Cu-10wt% of non-consumable refractory metal elements such as Cr and Cu-10wt% of Fe; converter the melt to holding furnace, perform a second melt treatment, further reducing the oxygen content in the melt to 19ppm by adding Cu-10wt% Mg, cu-14wt% as P and pure metal Zn; finally, second alloying, dispersing and adding Cu-15wt% Zr and Cu-15wt% Ti, adjusting the components to obtain the desired copper alloy melt.
(3) Casting: and (3) casting the copper alloy melt obtained in the step (2) at 1250 ℃ to obtain a copper alloy casting blank with the specification of 210 x 620 mm.
(4) Hot rolling: and (4) carrying out hot rolling and on-line quenching on the copper alloy casting blank obtained in the step (3), wherein the hot rolling heating temperature is 940 ℃, the heat preservation time is 4h, and the on-line quenching temperature is 718 ℃, so that a copper alloy hot rolled strip blank with the thickness of 15mm is obtained.
(5) Cold rolling: and (5) performing face milling and cold rolling on the copper alloy hot rolled strip blank obtained in the step (4), wherein the total cold rolling deformation is 92%, and obtaining the copper alloy cold rolled strip blank with the thickness of 1.1 mm.
(6) Solid solution: and (3) carrying out online solution quenching treatment on the copper alloy cold-rolled strip blank obtained in the step (5) at a heating temperature of 940 ℃ for 3 minutes, wherein the average grain sizes of the strip blank after the solution quenching treatment in three directions of RD, TD and ND are respectively 6.0 mu m, 7.3 mu m and 8.1 mu m, and the maximum deviation of the grain sizes in three dimensions is 35%.
(7) Deformation-heat treatment: carrying out primary cold rolling on the copper alloy solid solution strip obtained in the step (6), wherein the cold rolling deformation is 60%, and carrying out primary aging treatment on the strip subjected to the primary cold rolling at 495 ℃ for 5 hours; carrying out secondary cold rolling on the strip subjected to the primary aging treatment, wherein the deformation amount is 40%, and then carrying out secondary aging treatment, wherein the temperature is 450 ℃ and the time is 3h; and (5) carrying out cold rolling for three times on the strip billet after the secondary aging, wherein the deformation is 50%, and obtaining the copper alloy strip billet with the thickness of 0.127 mm.
(8) Stress relief treatment: and (4) carrying out low-temperature tension annealing, stretch bending straightening and other treatments on the copper alloy strip blank obtained in the step (7), carrying out low-temperature tension annealing on the copper strip for 80 seconds at the heating temperature of 400 ℃, and carrying out stretch bending straightening on the annealed strip to obtain a high-performance copper alloy strip finished product. The main preparation process parameters adopted in example 4 are shown in table 2, and the properties of the high-performance copper alloy strip finished product obtained in example 4 are shown in table 3.
Example 5
(1) Preparing materials: preparing raw materials according to the composition requirements of the copper alloy strip, using main raw materials of industrially pure copper and the intermediate alloy Cu-10wt% Cr, cu-15wt% Zr, cu-10wt% Mg, cu-10wt% Fe, cu-15wt% Ti and Cu-14wt% P; the other raw materials adopted are Cu-10wt% La and pure metal Zn; and all raw materials are correspondingly dried and treated for removing foreign matters. The composition of the copper alloy strip of example 5 and its content are shown in table 1.
(2) Smelting: the method comprises the following steps of putting raw material industrial pure copper into an induction melting furnace for melting, and carrying out two-step melt treatment on a melt, wherein the method comprises the following specific steps: melting copper, performing first melt treatment, and deoxidizing and degassing by adopting two combination modes of charcoal covering and inert gas introduction into the melt to reduce the oxygen content to 42ppm; further performing a first alloying, adding Cu-10wt% Cr and Cu-10wt% of non-easily consumable metal elements such as Fe; converter the melt latent liquid to a holding furnace, perform a second melt treatment, further reduce the oxygen content in the melt to 25ppm by adding Cu-10wt% Mg, cu-14wt% P, cu-10wt% La and pure metal Zn; finally, the second alloying is carried out, cu-15wt% of Zr and Cu-15wt% of Ti are dispersedly added, and the components are adjusted to obtain the desired copper alloy melt.
(3) Casting: and (3) casting the copper alloy melt obtained in the step (2) at the casting temperature of 1280 ℃ to obtain a copper alloy casting blank with the specification of 210 mm by 620 mm.
(4) Hot rolling: and (4) carrying out hot rolling and on-line quenching on the copper alloy casting blank obtained in the step (3), wherein the hot rolling heating temperature is 960 ℃, the heat preservation time is 5h, and the on-line quenching temperature is 722 ℃, so that a copper alloy hot rolled strip blank with the thickness of 15mm is obtained.
(5) Cold rolling: and (5) performing face milling and cold rolling on the copper alloy hot rolled strip blank obtained in the step (4), wherein the total cold rolling deformation is 94%, and obtaining the copper alloy cold rolled strip blank with the thickness of 0.8 mm.
(6) Solid solution: and (3) carrying out online solution quenching treatment on the copper alloy cold-rolled strip obtained in the step (5) at a heating temperature of 980 ℃ for 2 minutes, wherein the average grain sizes of the strip after the solution treatment in three directions of RD, TD and ND are respectively 6.56 mu m, 7.5 mu m and 8.6 mu m, and the maximum deviation of the grain sizes in three dimensions is 32%.
(7) Deformation-heat treatment: carrying out primary cold rolling on the copper alloy solid solution strip blank obtained in the step (6), wherein the cold rolling deformation is 50%, and carrying out primary aging treatment on the strip blank subjected to the primary cold rolling at 530 ℃ for 3h; carrying out secondary cold rolling on the strip subjected to the primary aging treatment, wherein the deformation is 60%, and then carrying out secondary aging treatment at 480 ℃ for 2h; and (4) carrying out cold rolling for three times on the strip billet after the secondary aging, wherein the deformation is 20%, and obtaining the copper alloy strip billet with the thickness of 0.127 mm.
(8) Stress relief treatment: and (4) carrying out low-temperature tension annealing, stretch bending straightening and other treatments on the copper alloy strip blank obtained in the step (7), carrying out low-temperature tension annealing on the copper strip for 40 seconds at the heating temperature of 450 ℃, and carrying out stretch bending straightening on the annealed strip to obtain a high-performance copper alloy strip finished product. The main preparation process parameters adopted in example 5 are shown in table 2, and the properties of the high-performance copper alloy strip finished product obtained in example 5 are shown in table 3.
Comparative example 1
(1) Preparing materials: preparing raw materials according to the component requirements of the copper alloy strip, wherein the main raw materials are industrial pure copper and master alloys Cu-10wt% and Cr and Cu-15wt% and Zr; and all raw materials are correspondingly dried and treated for removing foreign matters. The composition of the copper alloy strip of comparative example 1 and its content are shown in table 1.
(2) Smelting: the method comprises the following steps of putting raw material industrial pure copper into an induction melting furnace for melting, and carrying out two-step melt treatment on a melt, wherein the method comprises the following specific steps: melting copper, then carrying out melt treatment, and deoxidizing and degassing by adopting two combination modes of charcoal covering and inert gas introduction into the melt, so as to reduce the oxygen content to 46ppm; further performing first alloying, and adding Cu-10wt% to reduce Cr; the latent melt is transferred to a holding furnace, and only the oxygen content in the melt is tested to be 78ppm due to no metal deoxidation; performing a second alloying, adding Cu-15wt% Zr by dispersion, and adjusting the composition to obtain a desired copper alloy melt.
(3) Casting: and (3) casting the copper alloy melt obtained in the step (2) at 1250 ℃ to obtain a copper alloy casting blank with the specification of 210 x 620 mm.
(4) Hot rolling: and (4) carrying out heating hot rolling and on-line quenching on the copper alloy casting blank obtained in the step (3), wherein the hot rolling heating temperature is 920 ℃, the heat preservation time is 3 hours, and the on-line quenching temperature is 710 ℃, so that a copper alloy hot rolled strip blank with the thickness of 15mm is obtained.
(5) Cold rolling: and (4) performing surface milling and cold rolling on the copper alloy hot rolled strip blank obtained in the step (4), wherein the total cold rolling deformation is 90%, and obtaining the copper alloy cold rolled strip blank with the thickness of 1.4 mm.
(6) Solid solution: and (3) carrying out online solution quenching treatment on the copper alloy cold-rolled strip obtained in the step (5) at the heating temperature of 900 ℃ for 3 minutes, wherein the average grain sizes of the strip after the solution treatment in three directions of RD, TD and ND are 12.7 mu m, 15.3 mu m and 26 mu m respectively, the average grain size is more than 10 mu m, the maximum deviation of the grain sizes in three dimensions is 105%, and the maximum deviation of the grain sizes is more than 50%.
(7) Deformation-heat treatment: carrying out primary cold rolling on the copper alloy solid solution strip blank obtained in the step (6), wherein the cold rolling deformation is 60%, and carrying out primary aging treatment on the strip blank subjected to the primary cold rolling at 480 ℃ for 5 hours; carrying out secondary cold rolling on the strip subjected to the primary aging treatment, wherein the deformation is 50%, and then carrying out secondary aging treatment at the temperature of 450 ℃ for 3h; and (4) carrying out cold rolling for three times on the strip billet after the secondary aging, wherein the deformation is 40%, and obtaining the copper alloy strip billet with the thickness of 0.127 mm.
(8) Stress relief treatment: and (4) carrying out low-temperature tension annealing, stretch bending straightening and other treatments on the copper alloy strip blank obtained in the step (7), carrying out low-temperature tension annealing on the copper strip for 80 seconds at the heating temperature of 400 ℃, and carrying out stretch bending straightening on the annealed strip to obtain a high-performance copper alloy strip finished product. The main preparation process parameters adopted in the comparative example 1 are shown in a table 2, and the properties of the high-performance copper alloy strip finished product obtained in the comparative example 1 are shown in a table 3.
Comparative example 2
The intermediate alloy element of the copper alloy strip was increased by Mg element as compared with comparative example 1, and the composition and content of the copper alloy strip of comparative example 2 are shown in table 1; the oxygen content in the melt before the second alloying is maintained at 49ppm; the strip after the solution treatment was subjected to an on-line solution quenching treatment at a heating temperature of 900 ℃ for 3 minutes, the average grain sizes of the strip in three directions of RD, TD and ND after the solution treatment were 10.5 μm, 12.8 μm and 19 μm, respectively, the average grain size was > 10 μm, and the maximum deviation of the three-dimensional grain sizes was 81% and the maximum deviation of the grain sizes was > 50%. The rest of the process was the same as in comparative example 1. The main preparation process parameters adopted in the comparative example 2 are shown in the table 2, and the properties of the high-performance copper alloy strip finished product obtained in the comparative example 2 are shown in the table 3.
Table 1 table of compositions of copper alloy strips of examples and comparative examples
TABLE 2 Main preparation Process parameters used in the examples and comparative examples
TABLE 3 table of properties of finished copper alloy strip of examples and comparative examples
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. It should be noted that other equivalent modifications can be made by those skilled in the art in light of the teachings of the present invention, and all such modifications can be made as are within the scope of the present invention.
Claims (10)
1. The high-performance copper alloy strip is characterized by comprising the following components in percentage by mass: 0.2 to 0.7 percent of Cr0.02 to 0.1 percent of Zr, 0.05 to 0.2 percent of Mg, 0.05 to 0.2 percent of Fe, 0.02 to 0.06 percent of P, 0.02 to 0.1 percent of Ti, and the balance of Cu and inevitable impurity elements.
2. The high performance copper alloy strip of claim 1, wherein the copper alloy strip comprises the following components in percentage by mass: 0.3 to 0.6 percent of Cr, 0.04 to 0.08 percent of Zr, 0.08 to 0.15 percent of Mg, 0.08 to 0.15 percent of Fe, 0.02 to 0.06 percent of P, 0.02 to 0.06 percent of Ti, and the balance of Cu and inevitable impurity elements.
3. The high performance copper alloy strip of claim 1, wherein the composition of the copper alloy strip further comprises M, wherein the mass percent of M is less than 0.5%; wherein M is one or more of La, ce, sn, zn, ni and Si, the mass percentage of La is 0.02-0.04%, the mass percentage of Ce is 0.02-0.04%, the mass percentage of Sn is 0.02-0.2%, the mass percentage of Zn is 0.02-0.2%, the mass percentage of Ni is 0.02-0.2%, and the mass percentage of Si is 0.02-0.2%.
4. The high performance copper alloy strip of claim 1 or 2, wherein the copper alloy strip has a tensile strength of 595MPa to 640MPa, an elongation of 2% to 5%, an electrical conductivity of 80% to 85% iacs, and a softening temperature of 550 ℃ to 565 ℃.
5. A method of producing a high performance copper alloy strip according to any one of claims 1 to 3, comprising the steps of:
(1) Cr, zr, mg, fe, P and Ti in the components of the copper alloy strip are respectively added in the form of intermediate alloys of Cu-Cr, cu-Zr, cu-Mg, cu-Fe, cu-P and Cu-Ti, raw materials of Cu, cu-Cr, cu-Zr, cu-Mg, cu-Fe, cu-P, cu-Ti and M are prepared according to the components and the mass percentage of the components of the copper alloy strip, and M is one or more of La, ce, sn, zn, ni and Si, and the raw materials are dried and foreign matter is removed;
(2) After a raw material Cu is filled into an induction melting device for melting, adding other raw materials in the step (1) to obtain a copper alloy melt;
(3) Casting the copper alloy melt to obtain a copper alloy casting blank; the casting temperature is 1150-1280 ℃;
(4) Heating, hot rolling and online quenching are carried out on the copper alloy casting blank to obtain a copper alloy hot rolled strip blank; the temperature of heating and hot rolling is 900-960 ℃, the heat preservation time is 2-5 h, and the temperature of on-line quenching is 700-800 ℃;
(5) Carrying out surface milling and cold rolling on the copper alloy hot-rolled strip blank to obtain a copper alloy cold-rolled strip blank; the total cold rolling deformation is more than or equal to 85 percent;
(6) Carrying out online solution quenching treatment on the copper alloy cold-rolled strip blank to obtain a copper alloy solution strip blank;
(7) Carrying out cold rolling and aging treatment on the copper alloy solid solution strip blank to obtain a copper alloy strip blank;
(8) And carrying out tension annealing and stretch bending straightening treatment on the copper alloy strip blank to obtain a finished copper alloy strip.
6. The method for preparing a high performance copper alloy strip according to claim 5, wherein in step (1) the raw material Cu is industrial pure copper; the smelting device in the step (2) is a non-vacuum induction smelting device; when the raw material M is added in the step (2), la and Ce are respectively added in the form of Cu-La and Cu-Ce intermediate alloys, and Sn, zn, ni and Si are added in the form of pure metals; in the step (6), the average grain size of the copper alloy solid solution strip in the rolling direction, the transverse direction and the normal direction of the rolling surface is less than or equal to 10 mu m, and the maximum deviation of the grain sizes in the rolling direction, the transverse direction and the normal direction of the rolling surface is less than or equal to 50 percent.
7. The preparation method of the high-performance copper alloy strip according to claim 6, wherein in the step (2), the raw material Cu is put into an induction melting device to be melted, and then the first melt treatment and the deoxidation and impurity removal are sequentially carried out to obtain the copper melt after the impurity removal; adding raw materials Cu-Cr and Cu-Fe into the copper melt after impurity removal, and then carrying out primary alloying to obtain an intermediate melt added with Cr and Fe; when the raw material M needs to be added, adding the raw materials M, cu-Mg and Cu-P into the intermediate melt added with Cr and Fe for second melt treatment to obtain the intermediate melt added with Cr, fe, mg and P; adding the raw materials Cu-Zr and Cu-Ti into the intermediate melt added with Cr, fe, mg and P for second alloying to obtain the copper alloy melt.
8. The method for preparing the high-performance copper alloy strip according to claim 5, wherein the copper alloy solid solution strip is subjected to primary cold rolling in the step (7) to obtain a strip after the primary cold rolling, and the deformation of the primary cold rolling is 50-80%; carrying out primary aging treatment on the strip blank subjected to the primary cold rolling to obtain a strip subjected to the primary aging treatment, wherein the temperature of the primary aging treatment is 400-550 ℃, and the time is 2-8 h; and sequentially carrying out secondary cold rolling, secondary aging treatment and third cold rolling on the strip subjected to the primary aging treatment to obtain a copper alloy strip blank, wherein the secondary cold rolling has the deformation of 30-70%, the third cold rolling has the deformation of 20-60%, the secondary aging treatment has the temperature of 400-480 ℃ and the time of 2-4 h.
9. The method for preparing the high-performance copper alloy strip according to claim 5, wherein the temperature of the online solution quenching treatment in the step (6) is 800-980 ℃ and the time is 1-5 min; the process conditions for carrying out tension annealing on the copper alloy strip blank in the step (8) are as follows: and (3) carrying out low-temperature tension annealing on the copper alloy strip blank at the temperature of 300-450 ℃ for 30-200 seconds.
10. The method for preparing the high-performance copper alloy strip according to claim 7, wherein in the step (2), when the raw material Cu is put into an induction melting device for melting, and then is subjected to first melt treatment and deoxidation and impurity removal in sequence, one or two of charcoal, flake graphite and inert gas are used for deoxidation and impurity removal, and the oxygen content in the copper melt after impurity removal is reduced to below 50 ppm; the oxygen content in the intermediate melt added with Cr, fe, mg and P is reduced to below 30 ppm.
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| CN1856588A (en) * | 2003-09-19 | 2006-11-01 | 住友金属工业株式会社 | Copper alloy and method for production thereof |
| JP2012012644A (en) * | 2010-06-30 | 2012-01-19 | Hitachi Cable Ltd | Method for manufacturing copper alloy, and copper alloy |
| CN101906547A (en) * | 2010-07-21 | 2010-12-08 | 九星控股集团有限公司 | Non-vacuum smelting method of CuCrZr alloy |
| CN105518164A (en) * | 2013-08-30 | 2016-04-20 | 同和金属技术有限公司 | Copper alloy sheet material and method for producing same, and current-carrying component |
| CN113631741A (en) * | 2019-03-25 | 2021-11-09 | Ｊｘ金属株式会社 | Copper alloy plate, electronic component for energization, and electronic component for heat dissipation |
| CN110835699A (en) * | 2019-11-05 | 2020-02-25 | 宁波兴业盛泰集团有限公司 | High-strength high-conductivity copper-chromium-zirconium alloy material and preparation method thereof |
| CN111411255A (en) * | 2020-04-17 | 2020-07-14 | 中铝材料应用研究院有限公司 | Copper alloy for electronic component and preparation method thereof |
| CN113355554A (en) * | 2020-09-25 | 2021-09-07 | 宁波博威合金板带有限公司 | Copper-chromium alloy strip and preparation method thereof |
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