Ultra-high strengthen, high-conductivity CuNiSi series elastic copper alloy and method for preparing same

An elastic copper alloy, high electrical conductivity technology, applied in the field of CuNiSi elastic copper alloy and its preparation, can solve the problems of unspecified alloy composition and preparation process, achieve excellent stress relaxation resistance and comprehensive performance, simple production process, Effect of improving stress relaxation resistance

Inactive Publication Date: 2010-07-14
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above-mentioned patents, the composition and preparation process of the alloy that simultaneously meet the requirements of the above three performance indicators are not given.

Method used

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  • Ultra-high strengthen, high-conductivity CuNiSi series elastic copper alloy and method for preparing same
  • Ultra-high strengthen, high-conductivity CuNiSi series elastic copper alloy and method for preparing same
  • Ultra-high strengthen, high-conductivity CuNiSi series elastic copper alloy and method for preparing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1: Alloy composition: Ni: 8.2wt%; Si: 1.8wt%; Sn: 0.5wt%; Mg: 0.2wt%; Zr: 0.2wt%;

[0072] Firstly, dry the electrolytic copper, nickel, silicon, and tin and put them into a heating furnace to melt them, protect them with nitrogen and calcined charcoal, and melt them at a melting temperature of 1300-1450°C, cast them into ingots, and mill the impurities on the surface of the ingots; Carry out secondary remelting at 1300°C-1450°C, protect with nitrogen and calcined charcoal, after the ingot is completely melted, lower the furnace temperature to 1200°C-1250°C, then use copper-zirconium master alloy, magnesium and Add in the form of copper-magnesium alloy, form a CuNiSiSnMgZr alloy melt after melting, and cast the CuNiSiSnMgZr alloy melt into an ingot;

[0073] (2) Homogenization treatment and hot rolling

[0074] The ingots obtained by CuNiSiSnMgZr alloy melt casting are milled to remove surface defects, homogenized in a hydrogen protection furnace at 920 ° C ...

Embodiment 2

[0083] Embodiment 2: Alloy composition: Ni: 6.4wt%; Si: 1.2wt%; Sn: 0.3wt%; Mg: 0.1wt%; Zr: 0.1wt%;

[0084] Firstly, dry the electrolytic copper, nickel, silicon, and tin and put them into a heating furnace to melt them, protect them with nitrogen and calcined charcoal, and melt them at a melting temperature of 1300-1450°C, cast them into ingots, and mill the impurities on the surface of the ingots; Carry out secondary remelting at 1300-1450°C, protect with nitrogen and calcined charcoal, after the ingot is completely melted, lower the furnace temperature to 1200°C-1250°C, and then use copper-zirconium master alloy for zirconium, copper for magnesium - adding in the form of a magnesium alloy, forming a CuNiSiSnMgZr alloy melt after melting, and casting the CuNiSiSnMgZr alloy melt into an ingot;

[0085] (2) Homogenization treatment and hot rolling

[0086] The ingots obtained by CuNiSiSnMgZr alloy melt casting are milled to remove surface defects, homogenized in a hydrogen p...

Embodiment 3

[0095] Embodiment 3: Alloy composition: Ni: 7.3wt%; Si: 1.5wt%; Sn: 0.4wt%; Mg: 0.15wt%; Zr: 0.15wt%;

[0096] Firstly, dry the electrolytic copper, nickel, silicon, and tin and put them into a heating furnace to melt them, protect them with nitrogen and calcined charcoal, and melt them at a melting temperature of 1300-1450°C, cast them into ingots, and mill the impurities on the surface of the ingots; Carry out secondary remelting at 1300-1450°C, protect with nitrogen and calcined charcoal, after the ingot is completely melted, lower the furnace temperature to 1200°C-1250°C, and then use copper-zirconium master alloy for zirconium, copper for magnesium - adding in the form of a magnesium alloy, forming a CuNiSiSnMgZr alloy melt after melting, and casting the CuNiSiSnMgZr alloy melt into an ingot;

[0097] (2) Homogenization treatment and hot rolling

[0098] The ingots obtained by CuNiSiSnMgZr alloy melt casting are milled to remove surface defects, homogenized in a hydrogen...

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Abstract

Disclosed is a CuNiSi system elastic copper alloy with ultra high strength and high conductivity as well as a method for the production thereof, having (in weight percent ): Ni: 6.4 to 8.2wt percent; Si: 1.2 to 1.8wt percent; Sn: 0.3 to 0.5wt percent; Mg: 0.1 to 0.2wt percent; Zr: 0.1 to 0.2wt percent; and balance Cu, and the method for the production thereof comprises five steps of: (1) CuNiSi non-vacuum secondary remelting and ingot casting; (2) homogenizing treatment and hot rolling; (3) twin-stage solution treatment; (4) cold rolling; and (5) time effect treatment. The elastic copper alloy and the method have advantages of reasonable alloy constituents, high alloying degree, simple production process, convenient operation, low production cost, high alloy strength, high conductivity and good stress relaxation resistance, and can realize the preparation of large specification billet, and Ni and Si content in the prepared target alloy system is high, and the process method of the invention is suitable for the industrialized production, and can replace the current aerospace high-power hermetically sealed electromagnetic relays, as well as raw materials and production processes of high performance conductive elastic devices in the electronic industry.

Description

technical field [0001] The invention relates to a CuNiSi-based elastic copper alloy and a preparation method thereof, in particular to an ultra-high-strength, high-conductivity CuNiSi-based elastic copper alloy and a preparation method thereof. Mainly used in aerospace, aviation high-power sealed electromagnetic relays, and high-performance conductive elastic devices in the electronics industry. Background technique [0002] The development of industries such as aerospace, aviation, weapons, and ships has put forward higher requirements for various technical indicators and environmental adaptability of relays. High reliability, long life working performance, miniaturization, high load, high environmental adaptability and green environmental protection have become the main direction of relay development. For example, the power type sealed electromagnetic relay, its reed and contact limit on-off capacity is required to be able to switch a large current of 28Vd.c. The operati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06C22C1/02C22F1/08
Inventor 李周潘志勇肖柱雷前汪明朴
Owner CENT SOUTH UNIV
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