CN112853148A - High-strength high-elasticity bending-resistant copper alloy and preparation method and application thereof - Google Patents
High-strength high-elasticity bending-resistant copper alloy and preparation method and application thereof Download PDFInfo
- Publication number
- CN112853148A CN112853148A CN202011622098.6A CN202011622098A CN112853148A CN 112853148 A CN112853148 A CN 112853148A CN 202011622098 A CN202011622098 A CN 202011622098A CN 112853148 A CN112853148 A CN 112853148A
- Authority
- CN
- China
- Prior art keywords
- alloy
- copper
- block
- strip
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 105
- 238000005452 bending Methods 0.000 title claims abstract description 77
- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000000956 alloy Substances 0.000 claims abstract description 213
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 212
- 239000010949 copper Substances 0.000 claims abstract description 106
- 238000005728 strengthening Methods 0.000 claims abstract description 15
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims description 179
- 238000000137 annealing Methods 0.000 claims description 53
- 238000005266 casting Methods 0.000 claims description 42
- 239000002994 raw material Substances 0.000 claims description 25
- 238000003723 Smelting Methods 0.000 claims description 10
- 239000002244 precipitate Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 36
- 229910052759 nickel Inorganic materials 0.000 abstract description 36
- 229910052749 magnesium Inorganic materials 0.000 abstract description 35
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 35
- 229910052718 tin Inorganic materials 0.000 abstract description 35
- 229910052725 zinc Inorganic materials 0.000 abstract description 24
- 229910052745 lead Inorganic materials 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 132
- 229910052802 copper Inorganic materials 0.000 description 75
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 69
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 68
- 239000011889 copper foil Substances 0.000 description 57
- 238000002844 melting Methods 0.000 description 47
- 230000008018 melting Effects 0.000 description 47
- 239000007788 liquid Substances 0.000 description 40
- 239000011777 magnesium Substances 0.000 description 36
- 238000001816 cooling Methods 0.000 description 33
- 238000003801 milling Methods 0.000 description 32
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 31
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 30
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 30
- 239000011574 phosphorus Substances 0.000 description 30
- 238000010438 heat treatment Methods 0.000 description 27
- IUYOGGFTLHZHEG-UHFFFAOYSA-N copper titanium Chemical compound [Ti].[Cu] IUYOGGFTLHZHEG-UHFFFAOYSA-N 0.000 description 26
- RPYFZMPJOHSVLD-UHFFFAOYSA-N copper vanadium Chemical compound [V][V][Cu] RPYFZMPJOHSVLD-UHFFFAOYSA-N 0.000 description 26
- 239000000203 mixture Substances 0.000 description 26
- 239000011701 zinc Substances 0.000 description 25
- 239000010941 cobalt Substances 0.000 description 24
- 229910017052 cobalt Inorganic materials 0.000 description 24
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 24
- 238000009966 trimming Methods 0.000 description 24
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 19
- 239000003610 charcoal Substances 0.000 description 18
- 239000010936 titanium Substances 0.000 description 18
- 230000009286 beneficial effect Effects 0.000 description 17
- 239000000843 powder Substances 0.000 description 16
- 239000000126 substance Substances 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 15
- 230000006698 induction Effects 0.000 description 14
- 238000007599 discharging Methods 0.000 description 13
- 238000012545 processing Methods 0.000 description 10
- 238000004321 preservation Methods 0.000 description 9
- 238000002156 mixing Methods 0.000 description 7
- 229910000906 Bronze Inorganic materials 0.000 description 6
- 239000010974 bronze Substances 0.000 description 5
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- BSPSZRDIBCCYNN-UHFFFAOYSA-N phosphanylidynetin Chemical compound [Sn]#P BSPSZRDIBCCYNN-UHFFFAOYSA-N 0.000 description 4
- 229910052790 beryllium Inorganic materials 0.000 description 3
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000879 optical micrograph Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 230000005619 thermoelectricity Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000399 optical microscopy Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- C22C9/02—Alloys based on copper with tin as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
-
- 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
-
- 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
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Conductive Materials (AREA)
Abstract
The invention belongs to the technical field of alloys, and particularly relates to a high-strength, high-elasticity and bending-resistant copper alloy as well as a preparation method and application thereof. The high-strength high-elasticity bending-resistant copper alloy provided by the invention comprises the following elements in percentage by mass: 0.02 to 3.2 percent of Zn, 0.01 to 2.2 percent of Mg, 1.5 to 2.0 percent of Sn, 0.05 to 0.3 percent of Fe, 0.05 to 0.19 percent of Ni, 0.001 to 0.003 percent of Pb, 0.01 to 0.05 percent of P, 0.01 to 0.1 percent of strengthening element and the balance of Cu; the strengthening element is one or more of Ti, Co and V. The embodiment shows that the high-strength high-elasticity bending-resistant copper alloy provided by the invention has the tensile strength of 280-680 MPa, the elongation of 3-40%, the conductivity of 30-35% IACS, the elastic modulus of 108-113 GPa and bending resistance.
Description
Technical Field
The invention belongs to the technical field of alloys, and particularly relates to a high-strength, high-elasticity and bending-resistant copper alloy as well as a preparation method and application thereof.
Background
The high-strength high-elasticity copper alloy material has the excellent characteristics of high strength, good elasticity, fatigue resistance, small elastic hysteresis and corrosion resistance, is widely applied to the fields of manufacturing information industry, communication engineering, instruments and meters and automobile industry, and is particularly used as an alloy of parts for connecting electric appliances. At present, beryllium bronze alloy is generally adopted for components with high requirement on elasticity, but beryllium in the beryllium bronze is harmful to human bodies; and the other one is widely used tin-phosphor bronze which has excellent processing property, ductility, corrosion resistance and fatigue resistance, and the conventionally produced tin-phosphor bronze comprises QSn10-0.3, QSn9-0.3, QSn8-0.3 and QSn6.5-0.1, but the tin-phosphor bronze has high Sn content, so that the cost is high, and the bending resistance of the tin-phosphor bronze is poor.
Disclosure of Invention
In view of the above, the invention aims to provide a high-strength, high-elasticity and bending-resistant copper alloy and a preparation method thereof.
In order to achieve the purpose of the invention, the invention provides the following technical scheme:
the invention provides a high-strength high-elasticity bending-resistant copper alloy which comprises the following elements in percentage by mass:
0.02 to 3.2 percent of Zn, 0.01 to 2.2 percent of Mg, 1.5 to 2.0 percent of Sn, 0.05 to 0.3 percent of Fe, 0.05 to 0.19 percent of Ni, 0.001 to 0.003 percent of Pb, 0.01 to 0.05 percent of P, 0.01 to 0.1 percent of strengthening element and the balance of Cu;
the strengthening element is one or more of Ti, Co and V.
Preferably, the high-strength high-elasticity bending-resistant copper alloy contains nano needle-shaped precipitates; the size of the nano needle-shaped precipitate is 120-500 nm.
Preferably, the high-strength high-elasticity bending-resistant copper alloy has the tensile strength of 280-680 MPa, the elongation of 3-40%, the conductivity of 30-35% IACS and the elastic modulus of 108-113 GPa.
The invention also provides a preparation method of the high-strength high-elasticity bending-resistant copper alloy, which comprises the following steps:
sequentially smelting and drawing casting alloy raw materials to obtain an alloy strip;
and sequentially carrying out initial rolling, intermediate rolling, first annealing, first cold finish rolling, second annealing and second cold finish rolling on the alloy strip to obtain the high-strength high-elasticity bending-resistant copper alloy.
Preferably, the smelting temperature is 1200-1300 ℃;
the temperature of the drawing casting is 1150-1180 ℃, and the temperature of the alloy strip in the drawing casting, which is 20cm away from the outlet of the crystallizer, is 450-480 ℃.
Preferably, the total deformation rate of the blooming is 80-90%.
Preferably, the total deformation rate of the medium rolling is 60-80%.
Preferably, the heat preservation temperature of the first annealing is 400-650 ℃, and the heat preservation time is 3-7 h;
the total deformation rate of the first cold finish rolling is 65-85%.
Preferably, the heat preservation temperature of the second annealing is 350-550 ℃, and the heat preservation time is 4-8 hours;
and the total deformation rate of the second cold finish rolling is 20-60%.
The invention also provides application of the high-strength high-elasticity bending-resistant copper alloy in the technical scheme or the high-strength high-elasticity bending-resistant copper alloy prepared by the preparation method in the technical scheme as a part alloy for connecting electrical appliances.
The invention provides a high-strength high-elasticity bending-resistant copper alloy which comprises the following elements in percentage by mass: 0.02 to 3.2 percent of Zn, 0.01 to 2.2 percent of Mg, 1.5 to 2.0 percent of Sn, 0.05 to 0.3 percent of Fe, 0.05 to 0.19 percent of Ni, 0.001 to 0.003 percent of Pb, 0.01 to 0.05 percent of P, 0.01 to 0.1 percent of strengthening element and the balance of Cu; the strengthening element is one or more of Ti, Co and V. In the present invention, copper is a base element; the zinc is beneficial to improving the welding performance of the copper alloy and increasing the processing performance of the alloy; magnesium and zinc can form a nanometer needle-shaped precipitate, which is beneficial to improving the bending resistance of the copper alloy; the tin is beneficial to improving the casting quality of the copper alloy, increasing the fluidity of the copper alloy and improving the processing performance of the copper alloy; the iron is beneficial to refining the crystal grains of the copper alloy, delays the recrystallization process of the copper alloy, improves the strength and the hardness of the copper alloy and improves the mechanical property of the copper alloy; the nickel is beneficial to improving the strength, corrosion resistance, hardness, resistance and thermoelectricity of the copper alloy and reducing the resistivity temperature coefficient of the copper alloy; phosphorus and iron can form a strengthening phase, which is beneficial to enhancing the mechanical property of the copper alloy; lead is not solid-dissolved in copper, and can be dispersed and uniformly distributed under the condition of containing nickel, so that the machinability of the copper alloy can be improved; the strengthening elements of titanium, cobalt and vanadium are beneficial to improving the stress relaxation resistance of the copper alloy, and the bending resistance of the copper alloy is improved on the basis of improving the mechanical property. In addition, the zinc and the tin can reduce the consumption of the tin on the basis of improving the processing performance, and the cost of the copper alloy is synergistically reduced.
The test result of the embodiment shows that the high-strength high-elasticity bending-resistant copper alloy provided by the invention has the advantages that the tensile strength is 280-680 MPa, the elongation is 3-40%, the conductivity is 30-35% IACS, the elastic modulus is 108-113 GPa, no fracture exists when the R/T is 2, the bending is 90 degrees, the R/T is 0.5, and the bending resistance is excellent.
The invention also provides a preparation method of the high-strength, high-elasticity and bending-resistant copper alloy, which comprises the following steps: sequentially smelting and drawing casting alloy raw materials to obtain an alloy strip; and sequentially carrying out initial rolling, intermediate rolling, first annealing, first cold finish rolling, second annealing and second cold finish rolling on the alloy strip to obtain the high-strength high-elasticity bending-resistant copper alloy. The preparation method provided by the invention is beneficial to improving the work hardening rate of the high-strength high-elasticity bending-resistant copper alloy and improving the strength, elasticity and bending resistance of the copper alloy.
Drawings
FIG. 1 is an optical micrograph of a high-strength, high-elastic, bend-resistant copper alloy obtained in example 10.
Detailed Description
The invention provides a high-strength high-elasticity bending-resistant copper alloy which comprises the following elements in percentage by mass:
0.02 to 3.2 percent of Zn, 0.01 to 2.2 percent of Mg, 1.5 to 2.0 percent of Sn, 0.05 to 0.3 percent of Fe, 0.05 to 0.19 percent of Ni, 0.001 to 0.003 percent of Pb, 0.01 to 0.05 percent of P, 0.01 to 0.1 percent of strengthening element and the balance of Cu;
the strengthening element is one or more of Ti, Co and V.
The high-strength high-elasticity bending-resistant copper alloy comprises, by mass, 0.02-3.2% of Zn, preferably 0.04-3.1%, and more preferably 0.05-3.0%. In the invention, Zn is beneficial to improving the welding performance of the copper alloy and increasing the processing performance of the alloy; besides, Zn and Sn can reduce the consumption of Sn on the basis of improving the processing performance, and the cost of the copper alloy is synergistically reduced.
The high-strength high-elasticity bending-resistant copper alloy comprises, by mass, 0.01-2.2% of Mg, preferably 0.02-2.0%, and more preferably 0.03-1.5%. In the invention, Mg and zinc can form nano needle-shaped precipitates, which is beneficial to improving the bending resistance of the copper alloy.
The high-strength high-elasticity bending-resistant copper alloy comprises, by mass, 1.5-2.0% of Sn, preferably 1.55-1.95%, and more preferably 1.6-1.9%. In the invention, Sn is beneficial to improving the casting quality of the copper alloy, increasing the fluidity of the copper alloy and improving the processing performance of the copper alloy.
The high-strength high-elasticity bending-resistant copper alloy comprises, by mass, 0.05-0.3% of Fe, preferably 0.07-0.28%, and more preferably 0.08-0.25%. In the invention, Fe is beneficial to refining the crystal grains of the copper alloy, delays the recrystallization process of the copper alloy, improves the strength and the hardness of the copper alloy and improves the mechanical property of the copper alloy.
The high-strength high-elasticity bending-resistant copper alloy comprises, by mass, 0.05-0.19% of Ni, preferably 0.06-0.185%, and more preferably 0.08-0.18%. In the invention, Ni is beneficial to improving the strength, corrosion resistance, hardness, resistance and thermoelectricity of the copper alloy and reducing the specific temperature coefficient of the copper alloy.
The high-strength high-elasticity bending-resistant copper alloy comprises, by mass, 0.001-0.003% of Pb0.0013-0.003%, preferably 0.0013-0.003%, and more preferably 0.0015-0.003%. In the invention, Pb is not solid-dissolved in copper, and lead can be dispersed and uniformly distributed under the condition of containing nickel, thereby being beneficial to improving the mechanical processing performance of the copper alloy.
The high-strength high-elasticity bending-resistant copper alloy comprises, by mass, 0.01-0.05% of P, preferably 0.01-0.045%, and more preferably 0.01-0.04%. In the invention, P and Fe can form a strengthening phase, which is beneficial to enhancing the mechanical property of the copper alloy.
The high-strength high-elasticity bending-resistant copper alloy comprises, by mass, 0.01-0.1% of reinforcing elements, preferably 0.02-0.1%, and more preferably 0.04-0.1%. In the present invention, the strengthening element is one or more of Ti, Co and V. In the invention, the strengthening element is beneficial to improving the stress relaxation resistance of the copper alloy, and the bending resistance of the copper alloy is improved on the basis of improving the mechanical property.
The high-strength high-elasticity bending-resistant copper alloy comprises the balance of Cu in percentage by mass. In the present invention, Cu is a base element.
In the invention, the high-strength high-elasticity bending-resistant copper alloy preferably contains nano needle-shaped precipitates; the size of the nano needle-shaped precipitate is preferably 120 to 500nm, and more preferably 220 to 500 nm.
In the invention, the tensile strength of the high-strength, high-elasticity and bending-resistant copper alloy is preferably 280-680 MPa, and more preferably 320-680 MPa; the elongation is preferably 3-40%, and more preferably 19-40%; the electrical conductivity is preferably 30-35% IACS, more preferably 31-35% IACS, and the elastic modulus is preferably 108-113 GPa, more preferably 110-113 GPa. In the invention, the high-strength high-elasticity bending-resistant copper alloy has no fracture when the R/T is 0.2, the R/T is 90 degrees, the R/T is 0.5, and the R/T is 180 degrees.
The invention also provides a preparation method of the high-strength high-elasticity bending-resistant copper alloy, which comprises the following steps:
sequentially smelting and drawing casting alloy raw materials to obtain an alloy strip;
and sequentially carrying out initial rolling, intermediate rolling, first annealing, first cold finish rolling, second annealing and second cold finish rolling on the alloy strip to obtain the high-strength high-elasticity bending-resistant copper alloy.
The alloy raw materials are sequentially smelted and cast by drawing to obtain the alloy strip.
The invention has no special limitation on the element proportion of the alloy raw materials, and takes the element composition of the high-strength high-elasticity bending-resistant copper alloy as the standard. In the invention, the alloy raw materials preferably comprise a copper block, a copper foil, a nickel block, an iron block, a phosphorus simple substance, a magnesium block, a tin block, a lead block and a zinc block, and also comprise one or more of a cobalt block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy. In the invention, the elemental composition of the copper-titanium intermediate alloy is preferably 0.1-2 wt.% of Ti and the balance of Cu. In the invention, the elemental composition of the copper-vanadium master alloy is preferably 0.1-12 wt.% of V and the balance of Cu.
In the invention, the smelting temperature is preferably 1200-1300 ℃, and more preferably 1220-1280 ℃. In the invention, the smelting equipment is preferably a non-vacuum induction furnace.
In the invention, the smelting is preferably to perform first melting on the copper block to obtain copper liquid; mixing the copper liquid, the nickel block, the zinc block and the iron block, and performing second melting to obtain a first mixed alloy liquid; mixing the first mixed alloy liquid with a phosphorus simple substance, and carrying out third melting to obtain a second mixed alloy liquid; mixing the second mixed alloy liquid with a magnesium block wrapped by a copper foil, and carrying out fourth melting to obtain a third mixed alloy liquid; and mixing the third mixed alloy liquid, the tin block wrapped by the copper foil and the lead block wrapped by the copper foil, and performing fifth melting to obtain an alloy molten liquid. In the present invention, when the alloy raw material includes cobalt nuggets, the cobalt nuggets are preferably added simultaneously during the mixing of the copper liquid, nickel nuggets, and iron nuggets. In the present invention, when the alloy raw material includes a copper-titanium intermediate alloy, the copper-titanium intermediate alloy is preferably added simultaneously during the mixing of the second mixed alloy liquid and the copper foil-wrapped magnesium block. In the present invention, when the alloy raw material includes a copper-vanadium intermediate alloy, the copper-vanadium intermediate alloy is preferably added simultaneously during the process of mixing the second mixed alloy liquid and the copper foil-wrapped magnesium block. The invention reduces the oxidation of the surface of the alloy raw material through the wrapping of the copper foil on the alloy raw material. In the present invention, the time for the fifth melting is preferably 5 to 10min, more preferably 6 to 9min, and most preferably 8 min.
After the first mixed alloy liquid and the phosphorus simple substance are mixed, the covering agent is preferably added into the obtained smelting system, and then the third melting is carried out. In the present invention, the covering agent is preferably charcoal. In the present invention, the charcoal is preferably charcoal powder; the particle size of the charcoal powder is not particularly limited in the present invention, and the charcoal powder known to those skilled in the art may be used. The amount of the coating agent used in the present invention is not particularly limited, and may be an amount known to those skilled in the art.
In the present invention, after the fifth melting, the melt system obtained in the present invention is preferably allowed to stand to obtain an alloy melt. In the invention, the standing environment temperature is preferably 1200-1250 ℃, and the standing time is preferably 5-10 min. The invention is beneficial to improving the uniformity of the temperature of the melt system by standing.
After the alloy melt is obtained, the alloy melt is subjected to drawing casting to obtain the alloy strip.
In the invention, the temperature of the drawing casting is preferably 1150-1180 ℃, and more preferably 1155-1175 ℃. In the invention, the temperature of the alloy strip in the casting process, which is 20cm away from the outlet of the crystallizer, is preferably 450-480 ℃, and more preferably 455-475 ℃. The process of the drawing casting is not particularly limited in the present invention, and a drawing casting process known to those skilled in the art may be used. In the invention, the thickness of the alloy strip is preferably 14-20 mm, and more preferably 15-19 mm.
After the alloy strip is subjected to drawing casting, the temperature of the alloy strip is preferably reduced to room temperature; the temperature reduction is not particularly limited in the present invention, and the temperature reduction known to those skilled in the art may be adopted, specifically, air cooling.
After the alloy strip is obtained, the high-strength high-elasticity bending-resistant copper alloy is obtained by sequentially carrying out initial rolling, intermediate rolling, first annealing, first cold finish rolling, second annealing and second cold finish rolling on the alloy strip.
After the alloy strip is obtained, the alloy strip is subjected to initial rolling to obtain an initial rolled strip.
In the invention, the rolling temperature of the initial rolling is preferably 20-40 ℃, and more preferably 22-35 ℃. In the invention, the total deformation rate of the initial rolling is preferably 80-90%, more preferably 83-87%, and most preferably 85%. In the present invention, the number of rolling passes of the initial rolling is preferably 5 to 10, and more preferably 6 to 8. The deformation rate of each pass of rolling in the initial rolling is not specially limited, and the total deformation rate of the initial rolling is taken as a standard. In the present invention, the blooming plays a role of cogging.
Before the initial rolling, the alloy strip is preferably subjected to surface milling. In the present invention, the milling is preferably performed at room temperature; the room temperature is not particularly limited, and the room temperature known to those skilled in the art can be adopted, specifically, for example, 18 to 40 ℃. In the invention, the milling surfaces are preferably milling surfaces of two surfaces of the alloy strip respectively; the milling thickness of the single-side milling surface of the alloy strip is preferably 0.1-1 mm, more preferably 0.2-0.7 mm, and most preferably 0.3 mm.
After the initial rolled strip is obtained, the intermediate rolled strip is subjected to intermediate rolling to obtain the intermediate rolled strip.
In the invention, the rolling temperature of the medium rolling is preferably 20-40 ℃, and more preferably 22-35 ℃. In the invention, the total deformation rate of the medium rolling is preferably 60-80%, more preferably 62-78%, and still more preferably 65-75%. In the invention, the rolling pass of the medium rolling is preferably 2 to 6 times, and more preferably 3 to 5 times. The invention has no special limitation on the deformation rate of each pass of rolling in the medium rolling, and the invention takes the total deformation rate of the medium rolling as the standard.
After the medium rolling strip is obtained, the medium rolling strip is subjected to first annealing to obtain a first annealing strip.
In the invention, the heat preservation temperature of the first annealing is preferably 400-650 ℃, more preferably 430-620 ℃, and further preferably 450-600 ℃; the heat preservation time is preferably 3-7 h, more preferably 4-6 h, and most preferably 5 h. In the invention, the heat preservation temperature of the first annealing is preferably obtained by raising the temperature of the medium rolling temperature; the temperature rise rate is not particularly limited, and any temperature rise rate can be adopted. After the first annealing is maintained, the present invention preferably further comprises cooling the resulting first annealed strip to room temperature; the cooling is preferably furnace cooling. In the present invention, the first annealing realizes recrystallization annealing, eliminating work hardening.
After the first annealed strip is obtained, the first annealed strip is subjected to a first cold finish rolling to obtain a first cold finish rolled strip.
In the present invention, the total deformation ratio of the first cold finish rolling is preferably 65 to 85%, more preferably 68 to 83%, and still more preferably 70 to 80%. In the present invention, the number of passes of the first cold finish rolling is preferably 2 to 6, and more preferably 3 to 5. The deformation rate of each pass of rolling in the first cold finish rolling is not particularly limited, and the requirement of meeting the total deformation rate of the first cold finish rolling is met. In the present invention, the first finish cold rolling is preferably performed at room temperature, specifically, 18 to 40 ℃.
Before the first finish cold rolling, the first annealed strip is preferably trimmed according to the invention. In the invention, the width of the single-side cut edge in the cut edge is preferably 1-3 mm, more preferably 1.5-2.5 mm, and most preferably 2 mm.
After the first cold finish rolled strip is obtained, the first cold finish rolled strip is subjected to second annealing to obtain a second annealed strip.
In the invention, the heat preservation temperature of the second annealing is preferably 350-550 ℃, more preferably 370-530 ℃, and further preferably 400-500 ℃; the heat preservation time is preferably 4-8 h, more preferably 5-7 h, and most preferably 6 h. In the present invention, the holding temperature of the second annealing is preferably obtained by raising the temperature of the first cold finish rolling; the heating rate is preferably 40-120 ℃/min, and more preferably 70-100 ℃/min. After the second annealing is maintained, the present invention preferably further comprises cooling the resulting second annealed strip to room temperature; the cooling is preferably furnace cooling.
After a second annealing strip is obtained, carrying out second cold finish rolling on the second annealing strip to obtain the high-strength high-elasticity bending-resistant copper alloy.
In the present invention, the total deformation ratio of the second cold finish rolling is preferably 20 to 60%, more preferably 25 to 55%, and still more preferably 30 to 50%. In the present invention, the number of passes of the second cold finish rolling is preferably 1 to 5, and more preferably 1 to 3. The deformation rate of each pass of rolling in the second cold finish rolling is not particularly limited, and the requirement that the total deformation rate of the second cold finish rolling can be met is met. In the present invention, the second finish cold rolling is preferably performed at room temperature, specifically, 18 to 40 ℃.
The invention also provides application of the high-strength high-elasticity bending-resistant copper alloy in the technical scheme or the high-strength high-elasticity bending-resistant copper alloy prepared by the preparation method in the technical scheme as a part alloy for connecting electrical appliances.
In the invention, the high-strength high-elasticity bending-resistant copper alloy is preferably directly processed to obtain parts for electric connection. The present invention is not particularly limited to the above-mentioned processing, and may be processing known to those skilled in the art.
In order to further illustrate the present invention, the following examples are provided to describe the high strength, high elasticity and bending resistance copper alloy and the preparation method and application thereof in detail, but they should not be construed as limiting the scope of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block, copper-titanium intermediate alloy (element composition is 1.0 wt.% of Ti and balance of Cu) and copper-vanadium intermediate alloy (element composition is 4.0 wt.% of V and balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into copper liquid at 1200 ℃, adding a nickel block and an iron block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy which are wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing at 1200 ℃ for 7min to obtain an alloy melt;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1150 ℃, wherein the temperature of the alloy strip in the drawing casting, which is 20cm away from the outlet of the crystallizer, is 450 ℃, so as to obtain the alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 4-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 60 percent, and thus obtaining an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 400 ℃ for 5h for carrying out first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then carrying out 4-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 65 percent to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 350 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 1-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 20%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Example 2
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block and copper-titanium intermediate alloy (the element composition is 1.0 wt.% of Ti and the balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into copper liquid at 1210 ℃, adding a nickel block and an iron block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block and a copper-titanium intermediate alloy wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing for 8min at 1205 ℃ to obtain an alloy molten liquid;
after obtaining an alloy melt, carrying out drawing casting on the obtained alloy melt at 1160 ℃, wherein the temperature of the alloy strip in the drawing casting, which is 20cm away from the outlet of the crystallizer, is 460 ℃, so as to obtain an alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 5-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 70%, so as to obtain an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 450 ℃ for 5 hours for first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then performing 5-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 70%, so as to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 400 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 1-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 30%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Example 3
The raw material alloy is as follows: copper blocks, copper foils, nickel blocks, iron blocks, phosphorus simple substances, magnesium blocks, tin blocks, lead blocks, zinc blocks and cobalt blocks; the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into copper liquid at 1220 ℃, adding a nickel block, an iron block and a cobalt block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing for 7min at 1232 ℃ to obtain an alloy melt;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1170 ℃, wherein the temperature of the alloy strip in the drawing casting, which is 20cm away from the outlet of the crystallizer, is 470 ℃, so as to obtain an alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 5-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 80%, and thus obtaining an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 500 ℃ for 5 hours for first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then performing 5-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 75 percent to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 450 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 2-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 40%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Example 4
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block, cobalt block, copper-titanium intermediate alloy (element composition is 1.0 wt.% of Ti and balance of Cu) and copper-vanadium intermediate alloy (element composition is 4.0 wt.% of V and balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into molten copper at 1230 ℃, adding a nickel block, an iron block and a cobalt block into the molten copper, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy which are wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing for 8min at 1245 ℃ to obtain an alloy molten liquid;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1180 ℃, wherein the temperature of the alloy strip in the drawing casting at a position 20cm away from the outlet of the crystallizer is 480 ℃, and obtaining the alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 4-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 65%, so as to obtain an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 550 ℃ for 5 hours to carry out first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then carrying out 5-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 80%, so as to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 500 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 2-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 50%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Example 5
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block, cobalt block, copper-titanium intermediate alloy (element composition is 1.0 wt.% of Ti and balance of Cu) and copper-vanadium intermediate alloy (element composition is 4.0 wt.% of V and balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into copper liquid at 1240 ℃, adding a nickel block, an iron block and a cobalt block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing at 1208 ℃ for 7min to obtain an alloy melt;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1150 ℃, wherein the temperature of the alloy strip in the drawing casting at a position 20cm away from the outlet of the crystallizer is 455 ℃, and obtaining the alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 5-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 68 percent, and thus obtaining an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 600 ℃ for 5h for carrying out first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then carrying out 6-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 85 percent to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 550 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 3-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 60%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Example 6
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block, cobalt block, copper-titanium intermediate alloy (element composition is 1.0 wt.% of Ti and balance of Cu) and copper-vanadium intermediate alloy (element composition is 4.0 wt.% of V and balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into copper liquid at 1250 ℃, adding a nickel block, an iron block and a cobalt block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy which are wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing for 8min at 1235 ℃ to obtain an alloy melt;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1165 ℃, wherein the temperature of the alloy strip in the drawing casting at a position 20cm away from the outlet of the crystallizer is 465 ℃, and obtaining the alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 5-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 72%, so as to obtain an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 650 ℃ for 5h for carrying out first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimmed edge at one side is 2mm, and then carrying out 4-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 68% to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 450 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 1-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 30%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Example 7
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block, cobalt block, copper-titanium intermediate alloy (element composition is 1.0 wt.% of Ti and balance of Cu) and copper-vanadium intermediate alloy (element composition is 4.0 wt.% of V and balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into copper liquid at 1260 ℃, adding a nickel block, an iron block and a cobalt block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy which are wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing for 7min at 1241 ℃ to obtain an alloy molten liquid;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1175 ℃, wherein the temperature of the alloy strip in the drawing casting, which is 20cm away from the outlet of the crystallizer, is 475 ℃, so as to obtain the alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 5-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 75%, so as to obtain an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 480 ℃ for 5 hours for first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then performing 5-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 78%, so as to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 480 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 2-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 45%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Example 8
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block, cobalt block, copper-titanium intermediate alloy (element composition is 1.0 wt.% of Ti and balance of Cu) and copper-vanadium intermediate alloy (element composition is 4.0 wt.% of V and balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into molten copper at 1270 ℃, adding a nickel block, an iron block and a cobalt block into the molten copper, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy which are wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing at 1235 ℃ for 8min to obtain an alloy molten liquid;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1165 ℃, wherein the temperature of the alloy strip in the drawing casting at a position 20cm away from the outlet of the crystallizer is 464 ℃ to obtain an alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 5-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 73%, so as to obtain an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 530 ℃ for 5h for carrying out first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimmed edge at one side is 2mm, and then carrying out 6-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 82%, so as to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 530 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 3-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 46%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Example 9
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block, cobalt block, copper-titanium intermediate alloy (element composition is 1.0 wt.% of Ti and balance of Cu) and copper-vanadium intermediate alloy (element composition is 4.0 wt.% of V and balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into copper liquid at 1280 ℃, adding a nickel block, an iron block and a cobalt block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy which are wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing at 1240 ℃ for 7min to obtain an alloy melt;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1168 ℃, wherein the temperature of the alloy strip in the drawing casting at a position 20cm away from the outlet of the crystallizer is 472 ℃, and obtaining an alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 7-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 80%, and thus obtaining an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 560 ℃ for 5h for first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then performing 5-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 77% to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 490 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 3-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 56%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Example 10
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block, cobalt block, copper-titanium intermediate alloy (element composition is 1.0 wt.% of Ti and balance of Cu) and copper-vanadium intermediate alloy (element composition is 4.0 wt.% of V and balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block at 1290 ℃ to obtain a copper liquid, adding a nickel block, an iron block and a cobalt block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy wrapped by a copper foil into an obtained melting system, adding a tin block wrapped by a copper foil and a lead block wrapped by a copper foil before discharging, keeping the temperature for 8min, and standing for 8min at 1230 ℃ to obtain an alloy melt;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1162 ℃, wherein the temperature of the alloy strip in the drawing casting at the position 20cm away from the outlet of the crystallizer is 456 ℃, and obtaining the alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 4-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 65%, so as to obtain an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 620 ℃ for 5h for first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then performing 6-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 83%, so as to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 510 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 1-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 22%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
The high-strength, high-elasticity and bending-resistant copper alloy obtained in this example was observed by optical microscopy, and the optical micrograph is shown in FIG. 1. As can be seen from FIG. 1, no cracks are found in the high-strength, high-elasticity and bending-resistant copper alloy.
Example 11
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block and copper-vanadium intermediate alloy (the element composition is 4.0 wt.% of V and the balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into copper liquid at 1300 ℃, adding a nickel block and an iron block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block and a copper-vanadium intermediate alloy wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing for 7min at 1237 ℃ to obtain an alloy molten liquid;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1158 ℃, wherein the temperature of the alloy strip in the drawing casting, which is 20cm away from the outlet of the crystallizer, is 454 ℃, so as to obtain the alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 5-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 75%, so as to obtain an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 470 ℃ for 5 hours for first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then performing 5-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 77% to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 430 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 1-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 34%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Example 12
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, tin block, lead block, zinc block, cobalt block, copper-titanium intermediate alloy (element composition is 1.0 wt.% of Ti and balance of Cu) and copper-vanadium intermediate alloy (element composition is 4.0 wt.% of Ti and balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into copper liquid at 1250 ℃, adding a nickel block, an iron block and a cobalt block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy which are wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing at 1234 ℃ for 8min to obtain an alloy melt;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1166 ℃, wherein the temperature of the alloy strip in the drawing casting at a position 20cm away from the outlet of the crystallizer is 465 ℃, and obtaining the alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 5-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 75%, so as to obtain an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 400 ℃ for 5h for carrying out first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then carrying out 4-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 65 percent to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 360 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 2-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 46%, and thus the high-strength high-elasticity bending-resistant copper alloy is obtained.
Comparative example 1
The raw material alloy is as follows: copper block, copper foil, nickel block, iron block, phosphorus simple substance, magnesium block, lead block, zinc block, cobalt block, copper-titanium intermediate alloy (element composition is 1.0 wt.% of Ti and balance of Cu) and copper-vanadium intermediate alloy (element composition is 4.0 wt.% of V and balance of Cu); the alloy element ratio is shown in table 1.
The preparation method comprises the following steps: placing a copper block in a non-vacuum induction furnace, melting the copper block into copper liquid at 1280 ℃, adding a nickel block, an iron block and a cobalt block into the copper liquid, adding elemental phosphorus after melting, adding covering agent charcoal powder, adding a magnesium block, a copper-titanium intermediate alloy and a copper-vanadium intermediate alloy which are wrapped by copper foil into an obtained melting system, adding a tin block wrapped by copper foil and a lead block wrapped by copper foil before discharging, keeping the temperature for 8min, and standing at 1240 ℃ for 7min to obtain an alloy melt;
after obtaining alloy melt, carrying out drawing casting on the obtained alloy melt at 1168 ℃, wherein the temperature of the alloy strip in the drawing casting at a position 20cm away from the outlet of the crystallizer is 472 ℃, and obtaining an alloy strip;
milling two surfaces of the obtained alloy strip, milling a single surface of the milled surface to remove the thickness of 0.3mm, and performing 7-pass initial rolling on the obtained milled surface strip at room temperature, wherein the total initial rolling deformation rate is 85% to obtain an initial rolled strip; carrying out 7-pass intermediate rolling on the obtained initial rolled strip at room temperature, wherein the total deformation rate of the intermediate rolling is 80%, and thus obtaining an intermediate rolled strip; preserving the heat of the obtained medium-rolled strip in a heating furnace at 560 ℃ for 5h for first annealing, cooling along with the furnace, trimming the obtained first annealed strip, wherein the width of the trimming edge at one side is 2mm, and then performing 5-pass first cold finish rolling at room temperature, wherein the total deformation rate of the first cold finish rolling is 77% to obtain a first cold finish rolled strip; preserving the heat of the obtained first cold finish rolling strip in a heating furnace at 490 ℃ for 6h for second annealing, and cooling along with the furnace to obtain a second annealed strip; and carrying out 3-pass second cold finish rolling on the obtained second annealed strip at room temperature, wherein the total deformation rate of the second cold finish rolling is 56%, and thus obtaining the copper alloy.
Table 1 alloying element composition (wt.%) of examples 1 to 12 and comparative example 1
Note: the "/" in table 1 indicates the absence of this element.
According to GB/T34505-; according to GB/T232-; according to YS/T478-; the average size of the acicular precipitated phase in the high-strength high-elasticity bending-resistant copper alloy obtained in the examples 1 to 12 and the average size of the acicular precipitated phase in the copper alloy obtained in the comparative example 1 are measured, and the measurement method is as follows: taking a section parallel to the rolling direction of the copper alloy strip for inlaying and polishing treatment, taking 25 micrometers multiplied by 40 micrometers as a basic rectangular unit, and observing the structure of the material by using an optical microscope; and selecting 10 different areas for statistical calculation, and finally taking the average value as the average size value of the needle-shaped precipitated phase. The above test results and measurement results are shown in table 2.
Table 2 test results of properties of high-strength, high-elasticity and bending-resistant copper alloy obtained in examples 1 to 12
As can be seen from Table 2, the high-strength, high-elasticity and bending-resistant copper alloy provided by the invention has the advantages that the tensile strength is 280-680 MPa, the elongation is 3-40%, the elastic modulus is 108-113 GPa, and the mechanical property is excellent; the conductivity is 30-35% IACS, and the conductivity is excellent; the steel plate has no fracture when the R/T is 2, the R/T is 90 degrees, the R/T is 0.5, and the steel plate is bent by 180 degrees, and has excellent bending resistance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The high-strength high-elasticity bending-resistant copper alloy is characterized by comprising the following elements in percentage by mass:
0.02-3.2% of Zn, 0.01-2.2% of Mg, 1.5-2.0% of Sn, 0.05-0.3% of Fe, 0.05-0.19% of Ni0.001-0.003% of Pb, 0.01-0.05% of P, 0.01-0.1% of strengthening elements and the balance of Cu;
the strengthening element is one or more of Ti, Co and V.
2. The high-strength high-elasticity bending-resistant copper alloy according to claim 1, wherein the high-strength high-elasticity bending-resistant copper alloy contains nano needle-shaped precipitates; the size of the nano needle-shaped precipitate is 120-500 nm.
3. The high-strength high-elasticity bending-resistant copper alloy as claimed in claim 1, wherein the high-strength high-elasticity bending-resistant copper alloy has a tensile strength of 280-680 MPa, an elongation of 3-40%, an electrical conductivity of 30-35% IACS, and an elastic modulus of 108-113 GPa.
4. The preparation method of the high-strength high-elasticity bending-resistant copper alloy as claimed in any one of claims 1 to 3, characterized by comprising the following steps:
sequentially smelting and drawing casting alloy raw materials to obtain an alloy strip;
and sequentially carrying out initial rolling, intermediate rolling, first annealing, first cold finish rolling, second annealing and second cold finish rolling on the alloy strip to obtain the high-strength high-elasticity bending-resistant copper alloy.
5. The preparation method according to claim 4, wherein the smelting temperature is 1200-1300 ℃;
the temperature of the drawing casting is 1150-1180 ℃, and the temperature of the alloy strip in the drawing casting, which is 20cm away from the outlet of the crystallizer, is 450-480 ℃.
6. The method according to claim 4, wherein the total deformation ratio of the blooming is 80 to 90%.
7. The method according to claim 4, wherein the total deformation rate of the medium rolling is 60-80%.
8. The preparation method according to claim 4, wherein the first annealing is carried out at a holding temperature of 400-650 ℃ for 3-7 h;
the total deformation rate of the first cold finish rolling is 65-85%.
9. The preparation method according to claim 4, characterized in that the holding temperature of the second annealing is 350-550 ℃, and the holding time is 4-8 h;
and the total deformation rate of the second cold finish rolling is 20-60%.
10. The application of the high-strength high-elasticity bending-resistant copper alloy according to any one of claims 1 to 3 or the high-strength high-elasticity bending-resistant copper alloy prepared by the preparation method according to any one of claims 4 to 9 as an alloy of parts for connecting electrical appliances.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011622098.6A CN112853148B (en) | 2020-12-31 | 2020-12-31 | High-strength high-elasticity bending-resistant copper alloy and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011622098.6A CN112853148B (en) | 2020-12-31 | 2020-12-31 | High-strength high-elasticity bending-resistant copper alloy and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112853148A true CN112853148A (en) | 2021-05-28 |
| CN112853148B CN112853148B (en) | 2021-09-17 |
Family
ID=75999187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011622098.6A Active CN112853148B (en) | 2020-12-31 | 2020-12-31 | High-strength high-elasticity bending-resistant copper alloy and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112853148B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277280A (en) * | 2021-12-07 | 2022-04-05 | 宁波博威合金材料股份有限公司 | Precipitation strengthening type tin brass alloy and preparation method thereof |
| CN115094258A (en) * | 2022-07-13 | 2022-09-23 | 浙江惟精新材料股份有限公司 | High-strength high-plasticity high-bending Cu-Ni-Si-Co alloy and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088229A (en) * | 2012-11-06 | 2013-05-08 | 北京有色金属研究总院 | Low-cost copper alloy for socket connectors and processing method thereof |
| CN105274386A (en) * | 2015-10-30 | 2016-01-27 | 北京有色金属研究总院 | High-performance complex multi-element phosphor bronze alloy material and preparation method thereof |
-
2020
- 2020-12-31 CN CN202011622098.6A patent/CN112853148B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088229A (en) * | 2012-11-06 | 2013-05-08 | 北京有色金属研究总院 | Low-cost copper alloy for socket connectors and processing method thereof |
| CN105274386A (en) * | 2015-10-30 | 2016-01-27 | 北京有色金属研究总院 | High-performance complex multi-element phosphor bronze alloy material and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277280A (en) * | 2021-12-07 | 2022-04-05 | 宁波博威合金材料股份有限公司 | Precipitation strengthening type tin brass alloy and preparation method thereof |
| CN115094258A (en) * | 2022-07-13 | 2022-09-23 | 浙江惟精新材料股份有限公司 | High-strength high-plasticity high-bending Cu-Ni-Si-Co alloy and preparation method and application thereof |
| CN115094258B (en) * | 2022-07-13 | 2023-02-17 | 浙江惟精新材料股份有限公司 | High-strength high-plasticity high-bending Cu-Ni-Si-Co alloy and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112853148B (en) | 2021-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2508632B1 (en) | Copper alloy sheet material | |
| EP2508634B1 (en) | Method for producing a copper alloy sheet material having low young's modulus | |
| KR100349934B1 (en) | Copper alloy and process for obtaining same | |
| EP1997920B1 (en) | Copper alloy for electric and electronic equipments | |
| CN106460099B (en) | Copper alloy sheet material, connector made of copper alloy sheet material, and method for manufacturing copper alloy sheet material | |
| CN112853148B (en) | High-strength high-elasticity bending-resistant copper alloy and preparation method and application thereof | |
| WO2005116282A1 (en) | Copper alloy | |
| JPS5853057B2 (en) | Highly conductive copper-based alloy | |
| JP6126791B2 (en) | Cu-Ni-Si copper alloy | |
| KR101627696B1 (en) | Copper alloy material for car and electrical and electronic components and process for producing same | |
| TW201233818A (en) | Copper alloy for electronic and/or electrical device, copper alloy thin plate, and conductive member | |
| KR20130089661A (en) | Copper alloy and method for producing copper alloy | |
| EP3050982A1 (en) | Copper alloy and copper alloy sheet | |
| EP2270242B1 (en) | Copper alloy material for electric or electronic apparatuses, method for producing it and component | |
| KR20140050003A (en) | Copper zinc alloy | |
| EP2267172A1 (en) | Copper alloy material for electric and electronic components | |
| KR101599653B1 (en) | Plate-like conductor for bus bar, and bus bar comprising same | |
| CN111118336B (en) | Corrosion-resistant high-elasticity copper alloy plug bush material and preparation method thereof | |
| EP1009866A1 (en) | Grain refined tin brass | |
| JP2015537117A (en) | Materials for electrical contact members | |
| JPH032341A (en) | High strength and high conductivity copper alloy | |
| CN111575531B (en) | High-conductivity copper alloy plate and manufacturing method thereof | |
| CN112048637B (en) | Copper alloy material and manufacturing method thereof | |
| KR102021442B1 (en) | A method of manufacturing a copper alloy sheet material excellent in strength and conductivity and a copper alloy sheet material produced therefrom | |
| TW201718888A (en) | Copper alloy for electric and electronic device, copper alloy sheet for electric and electronic device, conductive component for electric and electronic device, and terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A high strength, high elasticity and bending resistance copper alloy and its preparation method and application Effective date of registration: 20221009 Granted publication date: 20210917 Pledgee: Agricultural Bank of China Limited Shaoxing Shangyu sub branch Pledgor: Zhejiang Weijing New Material Co.,Ltd. Registration number: Y2022330002496 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231101 Granted publication date: 20210917 Pledgee: Agricultural Bank of China Limited Shaoxing Shangyu sub branch Pledgor: Zhejiang Weijing New Material Co.,Ltd. Registration number: Y2022330002496 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |