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Flame-retardant high-strength high-conductivity Cu-Li-Ag copper-lithium alloy

A copper-lithium alloy with high conductivity technology, applied in the field of alloys, can solve problems such as not meeting requirements, achieve the effects of preventing combustion and excessive evaporation, improving lithium yield, and simple smelting and processing methods

Inactive Publication Date: 2018-02-09
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a structural material, it is far from meeting the requirements to only have flame retardancy during smelting and prevent lithium volatilization during smelting. More importantly, the final copper-lithium alloy product must also have satisfactory mechanical properties. Strength, at least reaching the level of mechanical properties of commonly used copper-lithium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A Cu-Li-Ag copper-lithium alloy with 1220-degree melting, flame-retardant, high-strength and high-conductivity. In terms of weight percentage, the chemical composition of the alloy is: Li: 0.9wt.%, Ag: 1.8wt.%, Ca: 1.6wt.%, Sr: 0.8wt.%, In: 0.1wt.%, Hf: 0.3wt .%, Pr: 0.4wt.%, Er: 0.1wt.%, B: 0.1wt.%, the balance is copper. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 1220 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 1220 degrees for 10 minutes and poured into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 8m / min. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 12%. Every 3 passes of rolling requires an intermedi...

Embodiment 2

[0019]A Cu-Li-Ag copper-lithium alloy with 1250-degree smelting, flame retardancy, high strength and high conductivity. In terms of weight percentage, the chemical composition of the alloy is: Li: 1.1wt.%, Ag: 1.9wt.%, Ca: 1.7wt.%, Sr: 0.6wt.%, In: 0.1wt.%, Hf: 0.3wt .%, Pr: 0.4wt.%, Er: 0.1wt.%, B: 0.1wt.%, the balance is copper. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 1250 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 1250 degrees for 10 minutes and poured into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 9m / min. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 12%. Every 3 passes of rolling requires an intermed...

Embodiment 3

[0021] A Cu-Li-Ag copper-lithium alloy with 1280-degree melting, flame retardancy, high strength and high conductivity. In terms of weight percentage, the chemical composition of the alloy is: Li: 1.1wt.%, Ag: 2.3wt.%, Ca: 1.6wt.%, Sr: 0.8wt.%, In: 0.1wt.%, Hf: 0.3wt .%, Pr: 0.2wt.%, Er: 0.1wt.%, B: 0.1wt.%, the balance is copper. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 1280 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 1280 degrees for 10 minutes and poured into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 8m / min. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 14%. Every 3 passes of rolling requires an intermed...

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Abstract

The invention discloses a flame-retardant high-strength and high-conductivity Cu-Li-Ag copper-lithium alloy between 1200-1300 degrees and a processing technology thereof. In terms of weight percentage, the chemical composition of the alloy is: Li:0.8‑1.2wt.%, Ag:1.5‑3.0wt.%, Ca:1.5‑2.0wt.%, Sr:0.5‑1.0wt.%, In:0.1 ‑0.2wt.%, Hf: 0.2‑0.4wt.%, Pr: 0.1‑0.5wt.%, Er: 0.1‑0.2wt.%, B: 0.1‑0.2wt.%, and the balance is copper. The high-strength and high-conductivity copper-lithium alloy provided by this patent can be smelted in an atmospheric environment. Through the novel material science design, the alloying elements are screened out reasonably. By forming a layer of dense and durable protective film on the surface of copper-lithium melt, it can effectively prevent the burning of copper-lithium alloy in the atmospheric state. The material has a high tensile strength of 800-900MPa, and the electrical conductivity (%IACS) can be maintained at 94-96 (less than 80 for traditional copper alloys). And the material has an extremely excellent thermal conductivity (280-320W / m.K), and the thermal conductivity of general copper alloy materials is less than 200 W / m. K. The alloy is induction smelted under the atmosphere, the smelting and processing method is simple, and it is convenient for large-scale industrial application.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a copper-lithium alloy. Background technique [0002] Copper alloy has a series of good comprehensive properties: high electrical conductivity, good corrosion resistance, high elastic modulus, high strength, good process performance, and marine pollution resistance. Some copper alloys also have good cutting performance and wear resistance. Therefore, it is widely used in many industries, such as ship fittings, valve stems and submarine pipelines, etc. Copper and copper alloys play an important role in industrial sectors such as electrical engineering and electronics. Due to the emergence of integrated circuits, large-scale integrated circuits, etc., the requirements for copper alloys as conductive materials are no longer just the single performance of their conductivity, but require their performance to be significantly diversified. High-strength and high-conductivity copper al...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/02C22F1/08C22F1/02
CPCC22C9/00C22C1/02C22F1/02C22F1/08
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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