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Method for preparing CuNiSiAl elastic copper alloy

An elastic copper alloy and intermediate alloy technology, which is applied in the field of preparation of ultra-high strength, high-performance conductive elastic devices, and high stress relaxation resistance CuNiSiAl elastic copper alloy, can solve the problem that the electrical conductivity cannot reach high-power relays, and achieve production costs Low cost, simple production process, good electrical conductivity

Inactive Publication Date: 2011-03-09
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent ZL98104639.8 discloses a CuNiSiAl-based elastic copper alloy material that can partially replace beryllium bronze, but its electrical conductivity obviously cannot meet the requirements of reed materials on high-power relays

Method used

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  • Method for preparing CuNiSiAl elastic copper alloy
  • Method for preparing CuNiSiAl elastic copper alloy
  • Method for preparing CuNiSiAl elastic copper alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A. casting

[0028] Put the specified electrolytic copper, nickel and chromium into the heating furnace to melt, and the surface of the melt is covered with calcined charcoal to prevent oxidation. The melting temperature is 1300 ° C. After it is completely melted, the furnace temperature is lowered to 1180 ° C. - Silicon master alloy and copper-magnesium master alloy are added separately so that the composition range (by weight) Ni: 5.3wt%; Si: 1.0wt%; Al: 0.2%; Mg: 0.1wt%; Cr: 0.1wt%; The amount is Cu, and after melting to form a CuNiSiAlCrMg alloy melt, it is cast at 1250 ° C, and the casting mold used is an iron mold;

[0029] B. Homogenization

[0030] Remove surface defects from the ingot obtained in step A, and homogenize it in a nitrogen protection furnace at 940°C for 3 hours;

[0031] C. Hot rolling

[0032] The slab obtained in step B is hot-rolled and deformed, with a pass reduction of 40%, a total deformation of 80%, a start-rolling temperature of 930°C...

Embodiment 2

[0045] A. casting

[0046]Put the specified electrolytic copper, nickel and chromium into the heating furnace to melt, and the surface of the melt is protected by argon to prevent oxidation. The melting temperature is 1400°C. After it is completely melted, the furnace temperature is lowered to 1150°C, and the aluminum , copper-silicon master alloy and copper-magnesium master alloy are added separately, so that the composition range is (weight) Ni: 5.6wt%; Si: 0.9wt%; Al: 0.5%; Mg: 0.05wt%; Cr: 0.3wt% ; The balance is Cu, which forms a CuNiSiAlCrMg alloy melt after melting, and casts at 1280 ° C, and the casting mold used is an iron mold;

[0047] B. Homogenization

[0048] Remove surface defects from the ingot obtained in step A, and homogenize it in a nitrogen protection furnace at 930°C for 4 hours;

[0049] C. Hot rolling

[0050] The slab obtained in step B is hot-rolled and deformed, the rolling reduction in each pass is 35%, the total deformation is 70%, the startin...

Embodiment 3

[0063] A. casting

[0064] Put the specified electrolytic copper, nickel and chromium into the heating furnace to melt, and the surface of the melt is protected by argon to prevent oxidation. The melting temperature is 1500°C. After it is completely melted, the furnace temperature is lowered to 1200°C, and the aluminum , copper-silicon master alloy and copper-magnesium master alloy are added separately, so that the composition range is (weight) Ni: 5.8wt%; Si: 1.2wt%; Al: 0.2%; Mg: 0.1wt%; Cr: 0.1wt% ; The balance is Cu, which forms a CuNiSiAlCrMg alloy melt after melting, and casts at 1265 ° C, and the casting mold used is an iron mold;

[0065] B. Homogenization

[0066] Remove surface defects from the ingot obtained in step A, and homogenize it in a nitrogen protection furnace at 938°C for 5 hours;

[0067] C. Hot rolling

[0068] The slab obtained in step B is hot-rolled and deformed, the rolling reduction in each pass is 55%, the total deformation is 75%, the startin...

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Abstract

The invention relates to a method for preparing a CuNiSiAl elastic copper alloy, comprising the steps of fusion casting, homogenizing treatment, hot rolling, solid solution treatment, cold rolling, ageing treatment, secondary cold rolling, etc. The alloy has reasonable components, high alloying degree, simple production process and low production cost and is convenient to operate. Compared with beryllium bronze, the alloy produced by the invention has the advantages of high strength, good conductivity, high stress relaxation resistance and no toxic elements such as beryllium. The CuNiSiAl elastic copper alloy prepared by the invention has ultrahigh strength and high stress relaxation resistance and can be suitable for the high performance conductive elastic devices in the aerospace and microelectronics industries, such as high power hermetically sealed electromagnetic relays, etc.

Description

technical field [0001] The invention relates to a method for preparing a CuNiSiAl-based elastic copper alloy, in particular to a method for preparing an ultra-high-strength, high-stress-relaxation-resistant CuNiSiAl-based elastic copper alloy. It is mainly used in high-power sealed electromagnetic relays in aerospace and aviation industries, and high-performance conductive elastic devices in the electronics industry. Background technique [0002] With the development of industries such as aviation, aerospace, ships, and weapons, higher requirements are put forward for various technical indicators and environmental adaptability of high-power sealed electromagnetic relays in the defense industry. High reliability, long service life, high load, high environmental adaptability and green environmental protection have become the main directions for the development of high-power sealed electromagnetic relays. The limit on-off capability of the reed and contacts of the power-type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C1/02C22F1/08
Inventor 李周雷前汪明朴张良贾延琳潘志勇
Owner CENT SOUTH UNIV
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