CN111304486B - Copper-iron-phosphorus-zinc-tin alloy foil and production process thereof - Google Patents
Copper-iron-phosphorus-zinc-tin alloy foil and production process thereof Download PDFInfo
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- CN111304486B CN111304486B CN202010199551.0A CN202010199551A CN111304486B CN 111304486 B CN111304486 B CN 111304486B CN 202010199551 A CN202010199551 A CN 202010199551A CN 111304486 B CN111304486 B CN 111304486B
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- 239000011888 foil Substances 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 229910001128 Sn alloy Inorganic materials 0.000 title claims abstract description 16
- JOZKLJKLGOUOSY-UHFFFAOYSA-N [Sn].[Zn].[P].[Fe].[Cu] Chemical compound [Sn].[Zn].[P].[Fe].[Cu] JOZKLJKLGOUOSY-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 36
- 230000032683 aging Effects 0.000 claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 32
- 238000005266 casting Methods 0.000 claims abstract description 29
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 26
- 239000000956 alloy Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000003723 Smelting Methods 0.000 claims abstract description 21
- 238000005097 cold rolling Methods 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000010949 copper Substances 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 239000011701 zinc Substances 0.000 claims abstract description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011574 phosphorus Substances 0.000 claims abstract description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 7
- 229910052718 tin Inorganic materials 0.000 claims abstract description 7
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 11
- 238000010791 quenching Methods 0.000 claims description 11
- 230000000171 quenching effect Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 7
- 238000000265 homogenisation Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 239000003082 abrasive agent Substances 0.000 claims 1
- 238000010301 surface-oxidation reaction Methods 0.000 abstract description 3
- 229920006395 saturated elastomer Polymers 0.000 abstract description 2
- 210000001787 dendrite Anatomy 0.000 abstract 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000011135 tin Substances 0.000 description 5
- 229910001096 P alloy Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- 229910000640 Fe alloy Inorganic materials 0.000 description 3
- 229910007610 Zn—Sn Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- RIRXDDRGHVUXNJ-UHFFFAOYSA-N [Cu].[P] Chemical compound [Cu].[P] RIRXDDRGHVUXNJ-UHFFFAOYSA-N 0.000 description 2
- QZKWFURVKCYMSP-UHFFFAOYSA-N [P].[Fe].[Cu] Chemical compound [P].[Fe].[Cu] QZKWFURVKCYMSP-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 229910017827 Cu—Fe Inorganic materials 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010731 rolling oil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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
-
- 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
- B21B1/40—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 foils which present special problems, e.g. because of thinness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/005—Copper or its alloys
Abstract
The invention discloses a copper-iron-phosphorus-zinc-tin alloy foil and a production process thereof, wherein the alloy foil comprises 2.1-2.3% of iron, 0.02-0.05% of phosphorus, 0.08-0.2% of zinc, 0.01-0.04% of tin and the balance of copper. The production process comprises smelting and casting, solution treatment, primary cold rolling, primary aging, surface cleaning, secondary cold rolling and secondary aging. In order to ensure the uniformity of components, when the smelting temperature reaches 1300 ℃, the ingot can be cast after being subjected to power-off standing for 15-30min, the ingot is heated for 3-6 h at 900-1100 ℃, dendrites in the ingot are eliminated, the ingot is dynamically recrystallized through thermal processing, and the ingot is rolled at low temperature, so that the surface oxidation is avoided in the rolling process; the aging treatment is carried out by adopting a grading aging method, and the grain size can be full, saturated and uniform by adopting two-stage aging. The copper-iron-phosphorus-zinc-tin alloy foil with the thickness of 40 mu m produced by the method meets the requirement that the tensile strength exceeds 500MPa under the condition that the electric conductivity is not reduced, and the production of the copper-iron-phosphorus-zinc-tin alloy foil is realized.
Description
Technical Field
The invention belongs to the technical field of alloy foil processing, and particularly relates to a copper-iron-phosphorus-zinc-tin alloy foil and a production process thereof.
Background
In an integrated circuit, the lead frame serves as a carrier for connecting the chip to external components and functions as: firstly, supporting and fixing a chip, protecting internal elements and assembling an IC into a shell of an integral supporting frame structure; the load is connected with an external circuit to transmit electric signals, and meanwhile, the heat of the element is radiated outwards, so that the electric conduction and the heat conduction are realized. Therefore, the frame plays an extremely important role in the integrated circuit devices and various assembly procedures, and how to improve the performance of the frame material has become one of the outstanding problems in the development process of the integrated circuit. In recent years, considerable intensive research on Cu-Fe alloy has been carried out, and a large number of alloys meeting the requirements of IC frames are produced, and the alloys are widely applied to frame manufacturing due to excellent process performance and low price and are currently the mainstream alloys in copper alloy lead frame materials. 0.05 to 0.15 percent of Fe, 0.025 to 0.04 percent of P and the balance of Cu. However, the component proportion of the ferroalloy phosphor copper bar in the traditional smelting process can not meet the requirement, and the cast ingot has large gas content, large crystal grains, cracks, segregation and poor deslagging effect.
The lead frame plays the roles of supporting a chip, connecting a circuit and dissipating heat in the integrated circuit, has higher requirements on a high-performance copper-iron-phosphorus alloy lead material for ensuring the reliability and durability of the integrated circuit, and how to simultaneously realize high strength (more than 600 MPa) and high conductivity (more than 80% IACS) becomes a problem which needs to be solved urgently. The current approaches to obtain the high-strength, high-conductivity and high-performance copper-iron-phosphorus alloy are as follows: firstly, more trace alloy elements such as Zn, Sn, Mg and the like are introduced to realize solid solution strengthening; and secondly, deformation strengthening is carried out, and the strength and the hardness of the copper alloy are improved by carrying out cold plastic deformation on the copper alloy. More trace alloy elements are added to improve the alloy strength properly, but a plurality of problems exist at the same time, according to the alloying theory, the higher the alloying degree is, the higher the alloy strength is, but the conductivity is lower; if the conductivity is increased, the strength is decreased, and therefore, it is difficult to satisfy the requirement of achieving both the conductivity and the strength at the same time. Further, studies on the type of addition of the fourth and fourth or higher components and the existence form and action thereof in the alloy are not sufficient at present.
At present, the foil of Cu-Fe-P-Zn-Sn is difficult to smelt and cast due to the fact that alloy components are increased due to component change; secondly, because a plurality of rolling passes are needed, the influence of the production with high processing rate on the conductivity is great, the conductivity is rapidly attenuated, and the over 60 percent IACS is difficult to ensure; thirdly, the thickness of the finished product is 0.04mm, and the plate shape and tolerance precision are difficult to control, so the invention patent is designed.
Disclosure of Invention
Aiming at the problems that the foil of copper, iron, phosphorus, zinc and tin is difficult to melt and cast, the influence of the production with large processing rate on the electric conductivity is great, the electric conductivity is rapidly attenuated, more than 60 percent IACS is difficult to ensure, and the thickness and the tolerance precision of a finished product are difficult to control in the prior art, the invention provides the copper, iron, phosphorus, zinc and tin alloy foil and a production process thereof, wherein the produced copper, iron, phosphorus, zinc and tin alloy foil with the thickness of 40 mu m has the tensile strength of 500MPa and the electric conductivity of more than or equal to 65 percent IACS.
The invention is realized by the following technical scheme:
the copper-iron-phosphorus-zinc-tin alloy foil comprises, by weight, 2.1-2.3% of iron, 0.02-0.05% of phosphorus, 0.08-0.2% of zinc, 0.01-0.04% of tin, and the balance copper.
Preferably, the thickness of the copper-iron-phosphorus-zinc-tin alloy foil is 0.04 mm.
In the invention, the production process of the copper-iron-phosphorus-zinc-tin alloy foil comprises the following steps:
(1) smelting and casting: smelting and casting according to the chemical components of the alloy, wherein the smelting temperature is 1280-1320 ℃, the casting temperature is 1250-1300 ℃, the casting speed is 70-90 mm/min, and the cast ingot is processed;
(2) solution treatment: heating the ingot in the step (1) by adopting a step-by-step homogenization heating mode, wherein the temperature range is 900-1100 ℃, the speed is 8-12 m/min, then carrying out hot processing with the processing rate of more than 90% at the high temperature of 930-750 ℃ to obtain a strip blank, and carrying out quenching at the finishing temperature of 500-750 ℃; performing hot processing with the processing rate of more than 90% at high temperature to realize dynamic recrystallization of the cast ingot, wherein the thickness of the cast ingot after the hot processing is 13-15mm, the finish rolling temperature is controlled between 500 ℃ and 750 ℃ for quenching, the surface temperature of the cast ingot after quenching is less than or equal to 300 ℃, and the solid solution effect of the cast ingot is ensured;
(3) primary cold rolling: rolling at low temperature of 80-150 ℃, wherein the processing rate of a rolling process is 50-85%, the speed of the roller is 80-120m/min, and the cooling amount is 0.4-1.2bar, so that surface oxidation is avoided in the rolling process;
(4) primary aging: two-stage aging treatment, wherein the temperature of the first stage is 580-;
(5) surface cleaning: cleaning the cast ingot with a three-stage abrasive brush when the thickness of the cast ingot is 0.6-2.0mm, and treating the cast ingot with a two-stage polishing brush after a backing material is left when the thickness of the cast ingot is 0.2-0.8 mm;
(6) secondary cold rolling: rolling at low temperature of 80-150 deg.C, controlling working rate at 40-70%, and cooling amount at 0.5-0.8 bar;
(7) secondary aging: and (3) performing low-temperature secondary aging treatment at the temperature of 250-350 ℃ for 4-7 hours, so that the problem of non-uniform internal stress of the 0.04mm foil is solved, and the shape of the foil is ensured.
Preferably, the smelting in the step (1) is carried out for casting after the power-off standing is carried out for 15-30min when the temperature is higher than 1300 ℃.
Preferably, the surface temperature of the ingot in step (1) is higher than 800 ℃ after the ingot is pulled out of the crystallizer.
Preferably, the step-by-step homogenizing heating method adopted in step (2): the furnace is divided into ten furnace zones, each furnace zone can realize independent heating, and the temperature of each furnace zone is increased in the form of isothermal difference from the first furnace zone of 900 ℃ to every two adjacent furnace zones of 20 ℃.
Preferably, the surface temperature of the ingot after quenching in the step (2) is less than or equal to 300 ℃.
Preferably, the thickness after the hot processing in the step (2) is 13-16 mm.
Preferably, the rolling speed of the low-temperature rolling adopts a one-time speed-raising and in-place method, and the speed-raising and lowering during rolling influences the tolerance precision of the alloy strip, so that the one-time speed-raising and in-place method is adopted, and the head and tail tolerance mismatching is reduced.
Preferably, the number of the three-level abrasive brushes in the step (5) is 240-800 meshes, the diameter of the brush wire is 0.15-0.35mm, and the reduction current is 6-12A; the two-stage polishing brush mesh number is 1500-3000 meshes, and the reduction current is 6-12A, so that the complete removal of the surface oxide skin is ensured.
Preferably, the cold rolling in the step (6) adopts a low-temperature six-roller rolling mill for rolling, three-roller straightening is adopted before and after the rolling mill, and the roller roughness Ra is controlled to be 0.06-0.09 mu m.
The alloy is cast by adopting a red ingot, and can be cast when the alloy is smelted and is powered off and kept stand for 15-30min when the temperature reaches 1300 ℃; because the alloy has dendritic segregation in the casting process, the alloy needs to be heated for 3-6 h at 1100 ℃ under 900 plus materials, the dendritic crystal in the ingot is eliminated, the uniform distribution of the components is ensured, the ingot is dynamically recrystallized by hot processing with the processing rate of more than 90% at high temperature, the thickness of the ingot after the hot processing is 13-16mm, the final rolling temperature is controlled to be 500 ℃ for quenching, the surface temperature of the ingot after the quenching is less than or equal to 250 ℃, and the solid solution effect of the ingot is ensured; further rolling at low temperature with the rolling process processing rate of 80-95%, the rolling speed of 80-150m/min and the cooling amount of 0.4-1.2bar, so as to ensure that no surface oxidation occurs in the rolling process; the aging treatment is carried out by adopting a grading aging method, and the grain size can be full, saturated and uniform by adopting two-stage aging; cleaning by adopting a three-level abrasive brush to ensure that the surface oxide skin is completely removed; reserving a base material with the thickness of 0.2-0.8mm, and adopting a two-stage polishing brush; repeatedly rolling at low temperature for multiple times, controlling the processing rate between 40 and 70 percent, controlling the oil injection quantity of rolling oil to exceed 0.5 to 0.8bar, and straightening by using three rollers before and after the rolling machine to ensure stable rolling in a rolling area, thereby improving the tolerance precision of the foil; finally, the problem of non-uniform internal stress of the 0.04mm foil is solved through low-temperature aging at the temperature of 250-350 ℃ and the heat preservation time of 4-7 hours, so that the shape of the foil is ensured.
Advantageous effects
(1) The key points of the invention are a smelting casting process, an aging process and a surface treatment process, in particular to methods of casting temperature control, ingot casting standing process setting, grain size control after graded aging, surface quality control in the processing process and the like in the smelting casting process, the uniformity control of iron in the casting process, the casting cooling strength influence the segregation degree of the ingot casting, the aspects of obtaining uniform large grains by graded aging, obtaining the uniformity of tissues by large processing rate and the like are the key points and the protection points of the invention;
(2) the Cu-Fe-P-Zn-Sn alloy foil with the thickness of 40 mu m produced by the invention has the tensile strength of 500MPa and the electric conductivity of more than or equal to 65 percent IACS, and can meet the requirement that the tensile strength exceeds 500MPa under the condition that the electric conductivity is not reduced, thereby realizing the production of the Cu-Fe-P-Zn-Sn alloy foil;
(3) the alloy manufactured by the invention can meet the requirements of the current rapid development communication industry, can meet the electronic and power industries such as mobile phone built-in electronic structural parts and the like, and pursues thinness, high strength and high conductivity.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description is provided clearly and completely, and other similar embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application based on the embodiments in the present application.
The raw materials in the embodiment of the invention are cathode copper, copper-iron alloy containing 10% of iron, phosphorus-copper alloy, tin ingot and zinc ingot.
Example 1
The preparation method of the invention is used for processing a 0.04mm copper-iron-phosphorus-zinc-tin alloy foil finished product (2.26 percent of iron, 0.031 percent of phosphorus, 0.15 percent of zinc, 0.03 percent of tin, the balance of copper and impurities less than 0.1 weight percent), and the preparation process comprises the following steps: smelting and casting, solution treatment, primary cold rolling, primary aging, surface cleaning, secondary cold rolling and secondary aging, and the method comprises the following specific steps:
(1) smelting and casting: smelting and casting according to the chemical components of the alloy, wherein the smelting temperature is 1300 ℃, the casting temperature is 1260 ℃, the casting speed is 80mm/min, the alloy is processed into an ingot, the ingot is cast after being smelted and then being powered off and kept stand for 24min, and the surface temperature of the ingot is 860 ℃ after being pulled out of a crystallizer;
(2) solution treatment: heating the ingot in the step (1) by adopting a stepping type homogenization heating mode, wherein the temperature range is 900-1100 ℃, the speed is 10 m/min, ten cells are divided in a furnace, each furnace zone can realize independent heating, the difference between every two adjacent furnace zones is 20 ℃ from the 900 ℃ of the first furnace zone, the temperature of each furnace zone is increased in an isothermal difference mode, then hot processing with the processing rate of 95% is carried out at the high temperature of 950 ℃, the thickness after the hot processing is 15mm, the finish rolling temperature is controlled at 709 ℃ for quenching, and the surface temperature of the ingot after the quenching is 285 ℃;
(3) primary cold rolling: rolling to 1.5mm at low temperature of 120 ℃ by adopting a one-time speed-raising in-place method, wherein the processing rate of a rolling process is 84%, the speed of a roller is 96m/min, and the cooling amount is 0.8 bar;
(4) primary aging: two-stage aging treatment, wherein the temperature of the first stage is 650 ℃, the temperature is kept for 4 hours, the temperature is reduced to 320 ℃, the temperature is increased to 480 ℃, and the temperature is kept for 8 hours;
(5) surface cleaning: cleaning with 600 mesh three-stage abrasive brush, with brush wire diameter of 0.20mm, current reduction of 10A, and backing material when thickness is 0.12mm, and treating with 2000 mesh two-stage polishing brush, with current reduction of 8A;
(6) secondary cold rolling: rolling to 0.04mm at low temperature of 120 ℃ by adopting a one-time speed-raising in-place method, controlling the processing rate at 67 percent and cooling the product at 0.75 bar;
(7) secondary aging: low-temperature secondary aging treatment at 280 ℃ for 6 hours.
Example 2
The preparation method of the invention is used for processing a 0.04mm copper-iron-phosphorus-zinc-tin alloy foil finished product (2.15 percent of iron, 0.025 percent of phosphorus, 0.12 percent of zinc, 0.026 percent of tin, the balance of copper and impurities less than 0.1 weight percent), and the preparation process comprises the following steps: smelting and casting, solution treatment, primary cold rolling, primary aging, surface cleaning, secondary cold rolling and secondary aging, and the method comprises the following specific steps:
(1) smelting and casting: smelting and casting according to the chemical components of the alloy, wherein the smelting temperature is 1315 ℃, the casting temperature is 1290 ℃, the casting speed is 75mm/min, the alloy is processed into an ingot, the ingot is cast after being smelted and being powered off and standing for 25min, and the surface temperature of the ingot is 825 ℃ after being pulled out of a crystallizer;
(2) solution treatment: heating the ingot in the step (1) by adopting a stepping type homogenization heating mode, wherein the temperature range is 900-1100 ℃, the speed is 9 m/min, ten furnace zones are divided, each furnace zone can realize independent heating, the difference between every two adjacent furnace zones is 20 ℃ from the 900 ℃ of the first furnace zone, the temperature of each furnace zone is increased in an isothermal difference mode, then hot processing with the processing rate of 92% is carried out at the high temperature of 945 ℃, the thickness of the foil after hot processing is 16mm, the final rolling temperature is controlled to be 650 ℃ for quenching, and the surface temperature of the ingot after quenching is 296 ℃;
(3) primary cold rolling: rolling to 1.35mm at low temperature of 130 ℃ by adopting a one-time speed-raising in-place method, wherein the processing rate of a rolling process is 85 percent, the speed of a roller is 86m/min, and the cooling amount is 1.1 bar;
(4) primary aging: performing two-stage aging treatment, wherein the temperature of the first stage is 600 ℃, keeping the temperature for 4 hours, cooling to 285 ℃, heating to 490 ℃, and keeping the temperature for 6 hours;
(5) surface cleaning: cleaning with 600 mesh three-stage abrasive brush, with brush wire diameter of 0.20mm, current reduction of 10A, and backing material when thickness is 0.1mm, and treating with 2000 mesh two-stage polishing brush; the voltage reduction current is 8A;
(6) secondary cold rolling: rolling to 0.04mm at 145 ℃ by adopting a one-time speed-raising in-place method, controlling the processing rate to be 60%, and cooling the steel plate by 0.8 bar;
(7) secondary aging: low-temperature secondary aging treatment at 300 ℃ and heat preservation for 5 hours.
Comparative example 1
The procedure of example 1 was the same as that of example 1 except that the ingot was directly cast without stopping the power supply and left to stand at the melting temperature in step (1) of example 1.
Comparative example 2
The heating is carried out by changing the step-type homogenization heating mode in the step (2) of the example 1, and the ingot is directly heated to 1100 ℃ by using the conventional solid solution mode, and the rest steps are the same as the example 1.
Comparative example 3
The conventional aging treatment mode is changed, the aging temperature is 560 ℃, and the heat preservation is carried out for 8 hours.
Performance testing
Claims (9)
1. A production process of a copper-iron-phosphorus-zinc-tin alloy foil is characterized by comprising the following steps:
(1) smelting and casting: smelting and casting according to the chemical components of the alloy, wherein the smelting temperature is 1280-1320 ℃, the casting temperature is 1250-1300 ℃, the casting speed is 70-90 mm/min, and the cast ingot is processed;
(2) solution treatment: heating the ingot in the step (1) by adopting a step-by-step homogenization heating mode, wherein the temperature range is 900-1100 ℃, the speed is 8-12 m/min, then processing the ingot into a strip blank by 91-96% of hot processing at the high temperature of 930-;
(3) primary cold rolling: rolling at low temperature of 80-150 deg.C with rolling process rate of 50-85%, rolling speed of 80-120m/min, and cooling amount of 0.4-1.2 bar;
(4) primary aging: two-stage aging treatment, wherein the temperature of the first stage is 580-;
(5) surface cleaning: cleaning the cast ingot with a three-stage abrasive brush when the thickness of the cast ingot is 0.6-2.0mm, and treating the cast ingot with a two-stage polishing brush after a backing material is left when the thickness of the cast ingot is 0.2-0.8 mm;
(6) secondary cold rolling: rolling at low temperature of 80-150 deg.C, controlling working rate at 40-70%, and cooling amount at 0.5-0.8 bar;
(7) secondary aging: carrying out low-temperature secondary aging treatment at the temperature of 250-350 ℃ and keeping the temperature for 4-7 hours;
the copper-iron-phosphorus-zinc-tin alloy foil comprises, by weight, 2.1-2.3% of iron, 0.02-0.05% of phosphorus, 0.08-0.2% of zinc, 0.01-0.04% of tin and the balance copper.
2. The process of claim 1, wherein the copper-iron-phosphorus-zinc-tin alloy foil has a thickness of 0.04 mm.
3. The production process according to claim 1, wherein the smelting temperature in the step (1) is higher than 1300 ℃, and casting is carried out after the power-off standing for 15-30 min.
4. The process of claim 1, wherein the ingot of step (1) is drawn from the crystallizer with a surface temperature above 800 ℃; the surface temperature of the cast ingot after quenching in the step (2) is less than or equal to 300 ℃.
5. The production process according to claim 1, wherein the step-wise homogenizing heating in step (2): the furnace is divided into ten furnace zones, each furnace zone can realize independent heating, and the temperature of each furnace zone is increased in the form of isothermal difference from the first furnace zone of 900 ℃ to every two adjacent furnace zones of 20 ℃.
6. The process according to claim 1, wherein the hot worked thickness in step (2) is 13 to 16 mm.
7. The production process according to claim 1, wherein the rolling speed of the low-temperature rolling is a one-time speed-raising-in-place method.
8. The production process as claimed in claim 1, wherein the number of the tertiary abrasives in the step (5) is 240-800 meshes, the diameter of the brush wire is 0.15-0.35mm, and the reduction current is 6-12A; the number of the two-stage polishing brushes is 1500-3000 meshes, and the reduction current is 6-12A.
9. The production process according to claim 1, wherein the low-temperature cold rolling in the step (6) is performed by using a low-temperature six-roller mill, and three-roller straightening is performed before and after the mill.
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| CN112222188B (en) * | 2020-09-27 | 2022-07-12 | 先导薄膜材料（广东）有限公司 | Preparation method of high-purity indium foil |
| CN113265558B (en) * | 2021-03-22 | 2022-10-14 | 江西省科学院应用物理研究所 | Copper-iron alloy with excellent bending resistance and processing method thereof |
| CN115287495B (en) * | 2022-06-30 | 2023-05-30 | 宁波金田铜业(集团)股份有限公司 | Copper alloy strip for half-etched lead frame |
| CN115386764A (en) * | 2022-09-02 | 2022-11-25 | 中色奥博特铜铝业有限公司 | CuFe5 alloy foil and processing method thereof |
| CN115595465A (en) * | 2022-10-28 | 2023-01-13 | 安徽鑫科铜业有限公司（Cn） | Etched lead frame copper strip and production process |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3896793B2 (en) * | 2001-02-16 | 2007-03-22 | 日立電線株式会社 | Manufacturing method of high strength and high conductivity copper alloy material |
| CN101139669A (en) * | 2006-09-04 | 2008-03-12 | 中铝上海铜业有限公司 | Copper strip for framework, connector and packaging member and method for manufacturing same |
| JP4872577B2 (en) * | 2006-09-29 | 2012-02-08 | 日立電線株式会社 | Copper alloy backing plate and copper alloy manufacturing method for backing plate |
| JP2012057242A (en) * | 2010-09-13 | 2012-03-22 | Hitachi Cable Ltd | Method of manufacturing copper-based alloy with high strength, high conductivity and high heat resistance, and copper-based alloy with high strength, high conductivity and high heat resistance |
| CN103243231A (en) * | 2013-04-23 | 2013-08-14 | 中色（宁夏）东方集团有限公司 | High-strength high-conductivity copper base alloy and preparation method thereof |
| CN103898425A (en) * | 2012-12-24 | 2014-07-02 | 北京有色金属研究总院 | Composite heat treatment method applicable to Cu-Cr-Zr alloy wire |
| JP2015059266A (en) * | 2013-09-20 | 2015-03-30 | Jx日鉱日石金属株式会社 | Copper alloy foil |
| CN109402446A (en) * | 2018-12-24 | 2019-03-01 | 中铝洛阳铜加工有限公司 | A kind of high-end frame material copper strips preparation process |
-
2020
- 2020-03-20 CN CN202010199551.0A patent/CN111304486B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3896793B2 (en) * | 2001-02-16 | 2007-03-22 | 日立電線株式会社 | Manufacturing method of high strength and high conductivity copper alloy material |
| CN101139669A (en) * | 2006-09-04 | 2008-03-12 | 中铝上海铜业有限公司 | Copper strip for framework, connector and packaging member and method for manufacturing same |
| JP4872577B2 (en) * | 2006-09-29 | 2012-02-08 | 日立電線株式会社 | Copper alloy backing plate and copper alloy manufacturing method for backing plate |
| JP2012057242A (en) * | 2010-09-13 | 2012-03-22 | Hitachi Cable Ltd | Method of manufacturing copper-based alloy with high strength, high conductivity and high heat resistance, and copper-based alloy with high strength, high conductivity and high heat resistance |
| CN103898425A (en) * | 2012-12-24 | 2014-07-02 | 北京有色金属研究总院 | Composite heat treatment method applicable to Cu-Cr-Zr alloy wire |
| CN103243231A (en) * | 2013-04-23 | 2013-08-14 | 中色（宁夏）东方集团有限公司 | High-strength high-conductivity copper base alloy and preparation method thereof |
| JP2015059266A (en) * | 2013-09-20 | 2015-03-30 | Jx日鉱日石金属株式会社 | Copper alloy foil |
| CN109402446A (en) * | 2018-12-24 | 2019-03-01 | 中铝洛阳铜加工有限公司 | A kind of high-end frame material copper strips preparation process |
Non-Patent Citations (5)
| Title |
|---|
| Hot deformation behavior of Cu–Fe–P alloys during compression at elevated temperatures;Hui Zhang等;《journal of materials processing technology》;20081231;2892–2896 * |
| IC铜合金引线框架材料;王涛等;《有色金属加工》;20040430;9-17 * |
| Study on high-strength and high-conductivity Cu–Fe–P alloys;De-Ping Lu等;《Materials Science and Engineering A》;20061231;254-259 * |
| 固溶时效条件对C194合金性能的影响;蔡薇等;《稀有金属》;20040630;251-254 * |
| 铜基引线框架材料的研究与发展;马莒生等;《功能材料》;20021231;1-4 * |
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