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CN-121972532-A - High-compactness punching special-shaped copper strip and processing technology thereof

CN121972532ACN 121972532 ACN121972532 ACN 121972532ACN-121972532-A

Abstract

The invention relates to the field of copper strip production, in particular to a high-density punching special-shaped copper strip and a processing technology thereof, wherein the processing technology comprises the steps of S1, smelting a base material, putting a copper-based base material into smelting equipment for smelting treatment to obtain alloy liquid, S2, preparing a casting blank, continuously casting the alloy liquid, directly carrying out primary hot rolling to obtain a cast-rolled strip blank, S3, densification rolling, carrying out multi-pass cold rolling on the cast-rolled strip blank, carrying out primary intermediate annealing treatment after each 2-3 passes of cold rolling to obtain a high-density copper strip blank, S4, special-shaped forming, carrying out special-shaped processing on the high-density copper strip blank to obtain the high-density special-shaped copper strip, S5, precisely punching, positioning and punching the high-density special-shaped copper strip, and S6, and carrying out post treatment. According to the technical scheme, the high-compactness punching special-shaped copper strip is finally obtained by improving the purity of the base material, the tensile strength, the electric conduction and heat conduction stability of the copper strip are improved, and the application range of the copper strip in high-end fields such as precise electronics, new energy and the like is expanded.

Inventors

  • ZHANG YUNGONG

Assignees

  • 泰州麒润电子有限公司

Dates

Publication Date
20260505
Application Date
20260209

Claims (10)

  1. 1. A high-compactness punching special-shaped copper strip is characterized by comprising a copper-based substrate and a punching structure arranged on the surface of the copper-based substrate, wherein the cross section of the copper-based substrate is of a non-rectangular special-shaped structure, and the porosity of the copper-based substrate is less than or equal to 0.5%.
  2. 2. A processing technology of a high-compactness punching special-shaped copper strip, which is applied to the high-compactness punching special-shaped copper strip disclosed in claim 1, and is characterized by comprising the following steps: S1, smelting a base material, namely placing a copper-based base material into smelting equipment for smelting treatment to obtain an alloy liquid; S2, preparing a casting blank, namely continuously casting the alloy liquid, and then directly carrying out primary hot rolling to obtain a cast-rolled strip blank; s3, performing densification rolling, namely performing multi-pass cold rolling on the cast-rolled strip blank, and performing intermediate annealing treatment once after every 2-3 passes of cold rolling to obtain a high-compactness copper strip blank; s4, special-shaped forming, namely carrying out special-shaped processing on the high-compactness copper strip blank to obtain a high-compactness special-shaped copper strip; s5, precisely punching, namely positioning and punching the high-compactness special-shaped copper strip; s6, post-processing, deburring and finished product annealing are carried out on the punched high-density special-shaped copper strip, and the high-density punched special-shaped copper strip is obtained after detection is qualified.
  3. 3. The process for processing the high-compactness punched special-shaped copper strip according to claim 2, wherein the step S1 further comprises the following steps: S1a, adopting a vacuum smelting furnace for smelting, wherein the vacuum degree in the vacuum smelting furnace is less than or equal to 10 < -3 > Pa, the smelting temperature is 1100-1300 ℃, and the heat preservation time is 20-60 min; S1b, electromagnetic stirring is adopted in the smelting process, and the stirring speed is 300-500 r/min; S1C, adding a protective gas and a composite degasifier accounting for 0.3% -0.8% of the total mass of raw materials during smelting treatment, wherein the composite degasifier comprises 50% of graphite powder, 30% of titanium boride and 20% of calcium carbonate, the oxygen content in a furnace is less than or equal to 50ppm, and the smelting temperature is 1080-1250 ℃. S1d, online monitoring, wherein a laser gas analyzer is adopted in the smelting process to detect the content of O 2 、H 2 、N 2 in the vacuum smelting furnace in real time, and when the gas content exceeds a preset threshold value, the heat preservation time is automatically prolonged.
  4. 4. A process for machining a high-compactness punched special-shaped copper strip according to claim 3, wherein, S1e, adding a composite refining agent accounting for 0.5% -1.2% of the total mass of raw materials into the alloy liquid, wherein the composite refining agent comprises 40% of calcium fluoride, 30% of silicon dioxide and 30% of sodium carbonate, and standing for 20-30 min after stirring at 1150-1250 ℃; And S1f, after smelting is completed, standing the alloy liquid at 1200-1250 ℃ for 30-40 min, and removing surface slag.
  5. 5. A process for machining a high-compactness punching special-shaped copper strip according to claim 3, wherein the vacuum smelting furnace comprises a smelting furnace body (1), and a crucible (1 a), a heating component (1 b) and a vacuum component (1 c) which are arranged inside the smelting furnace body (1), and the process is characterized in that an electromagnetic stirrer (1 d) is arranged at the bottom of the crucible (1 a), a sleeve (1 e) is arranged above the crucible (1 a) in the smelting furnace body (1), a lifting seat (1 f) is arranged in the sleeve (1 e) in a sliding manner, an opening at the bottom of the sleeve (1 e) is blocked at the bottom of the lifting seat (1 f), and the lifting seat (1 f) is downwards moved by negative pressure suction when the vacuum component (1 c) is started, so that the working end of a laser gas analyzer (1 f 1) arranged in the lifting seat (1 f) is arranged inside the smelting furnace body (1).
  6. 6. The processing technology of the high-compactness punching special-shaped copper strip according to claim 5, wherein the lifting seat (1 f) comprises a top plate (1 f 2), a bottom plate (1 f 3) and a plurality of vertical guide rods (1 f 4), the guide rods (1 f 4) are respectively inserted into insertion blocks arranged at the bottom opening of the sleeve (1 e), the guide rods (1 f 4) are sleeved with springs (1 f 5), the springs (1 f 5) are elastically connected with the insertion blocks and the top plate (1 f 2), and the elastic force applied by the springs (1 f 5) enables the lifting seat (1 f) to have upward movement trend.
  7. 7. The processing technology of the high-compactness punching special-shaped copper strip according to claim 6, wherein a sealing gasket (1 f 6) is arranged at the top of the top plate (1 f 2), and the peripheral side of the sealing gasket (1 f 6) is attached to the inner wall of the sleeve (1 e).
  8. 8. The processing technology of the high-compactness punching special-shaped copper strip according to claim 6, wherein a positioning block (1 e 2) is arranged on the inner wall of the sleeve (1 e), the positioning block (1 e 2) is positioned below a top plate (1 f 2), and when the bottom of the top plate (1 f 2) is attached to the top of the positioning block (1 e 2), the working end of a laser gas analyzer (1 f 1) on the bottom plate (1 f 3) is completely positioned in the smelting furnace body (1).
  9. 9. The processing technology of the high-compactness punching special-shaped copper strip according to claim 8, wherein a conveying channel (1 f 7) is arranged in the center of the lifting seat (1 f), and a refining agent conveying pipeline (1 f 8) and a degassing agent conveying pipeline (1 f 9) are arranged in the conveying channel (1 f 7).
  10. 10. The processing technology of the high-compactness punching special-shaped copper strip according to claim 9, wherein the output end of the degasser conveying pipeline (1 f 9) is lower than the output end of the refining agent conveying pipeline (1 f 8), and when the top plate (1 f 2) is attached to the positioning block (1 e 2), the output end of the refining agent conveying pipeline (1 f 8) is positioned at the opening of the crucible (1 a), and the output end of the degasser conveying pipeline (1 f 9) is inserted into the crucible (1 a).

Description

High-compactness punching special-shaped copper strip and processing technology thereof Technical Field The invention relates to the field of copper strip production, in particular to a high-compactness punching special-shaped copper strip and a processing technology thereof. Background With the rapid development of high-end manufacturing fields such as precision electronics and new energy, higher requirements are put on the performance and structural suitability of copper strip components. The copper strip is required to have high compactness in order to ensure electric conduction, heat conduction and stability and vibration and fatigue resistance in a high-end application scene, the copper strip is also required to be matched with a narrow installation space by adopting a special-shaped section, and meanwhile, heat dissipation, weight reduction, positioning and other multifunctional integration are required to be realized through punching. In the preparation stage of a base material, the copper strip in the prior art has insufficient control of smelting process gas and poor matching of rolling and annealing parameters, so that the copper strip has high porosity (more than or equal to 1.0 percent), unstable mechanical and conductive properties, and low finished product qualification rate (less than 90 percent) due to the lack of an efficient on-line detection means, and is difficult to meet the requirements of high compactness, high precision and multiple functions, thereby restricting the application of the copper strip in the high-end field. Disclosure of Invention Aiming at the problems, it is necessary to provide a high-compactness punching special-shaped copper strip and a processing technology thereof aiming at the problems in the prior art. In order to solve the problems in the prior art, the invention adopts the following technical scheme: a high-compactness punching special-shaped copper strip comprises a copper-based substrate and a punching structure arranged on the surface of the copper-based substrate, wherein the cross section of the copper-based substrate is of a non-rectangular special-shaped structure, and the porosity of the copper-based substrate is less than or equal to 0.5%. A processing technology of a high-compactness punching special-shaped copper strip is applied to a high-compactness punching special-shaped copper strip, and comprises the following steps: S1, smelting a base material, namely placing a copper-based base material into smelting equipment for smelting treatment to obtain an alloy liquid; S2, preparing a casting blank, namely continuously casting the alloy liquid, and then directly carrying out primary hot rolling to obtain a cast-rolled strip blank; s3, performing densification rolling, namely performing multi-pass cold rolling on the cast-rolled strip blank, and performing intermediate annealing treatment once after every 2-3 passes of cold rolling to obtain a high-compactness copper strip blank; s4, special-shaped forming, namely carrying out special-shaped processing on the high-compactness copper strip blank to obtain a high-compactness special-shaped copper strip; s5, precisely punching, namely positioning and punching the high-compactness special-shaped copper strip; s6, post-processing, deburring and finished product annealing are carried out on the punched high-density special-shaped copper strip, and the high-density punched special-shaped copper strip is obtained after detection is qualified. In order to make the O 2、H2、N2 impurity gas in the alloy liquid less during the smelting of the base material, the following characteristics are specifically set: The step S1 further comprises the following steps: S1a, adopting a vacuum smelting furnace for smelting, wherein the vacuum degree in the vacuum smelting furnace is less than or equal to 10 < -3 > Pa, the smelting temperature is 1100-1300 ℃, and the heat preservation time is 20-60 min; S1b, electromagnetic stirring is adopted in the smelting process, and the stirring speed is 300-500 r/min; S1C, adding a protective gas and a composite degasifier accounting for 0.3% -0.8% of the total mass of raw materials during smelting treatment, wherein the composite degasifier comprises 50% of graphite powder, 30% of titanium boride and 20% of calcium carbonate, the oxygen content in a furnace is less than or equal to 50ppm, and the smelting temperature is 1080-1250 ℃. S1d, online monitoring, wherein a laser gas analyzer is adopted in the smelting process to detect the content of O 2、H2、N2 in the vacuum smelting furnace in real time, and when the gas content exceeds a preset threshold value, the heat preservation time is automatically prolonged. In order to remove Fe, pb and S impurities in the alloy liquid and obtain the alloy liquid with high purity, the following characteristics are specifically set: S1e, adding a composite refining agent accounting for 0.5% -1.2% of the total mass of raw materials into the alloy liquid