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High-heat-conductivity Cu-Li-Sc copper-lithium alloy with electric conductivity close to that of pure copper

A technology of copper-lithium alloy and electrical conductivity, which is applied in the field of alloys, can solve the problems of low resistivity, unsatisfactory electrical conductivity, and large carrying capacity, so as to prevent combustion and excessive evaporation, increase lithium yield, and reduce usage Effect

Inactive Publication Date: 2018-03-30
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(5) Large current carrying capacity: Due to the low resistivity, the copper core wire with the same cross-section is about 30% higher than the allowable current carrying capacity of the aluminum core wire (6) Low resistivity: the resistivity of the aluminum core wire is about higher than that of the copper core wire 1.68 times
[0006] However, as a copper alloy material for cables and electrical contact materials, only satisfactory electrical conductivity is far from meeting the requirements. More importantly, the final copper-lithium alloy product must also have satisfactory mechanical strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A high thermal conductivity Cu-Li-Sc copper-lithium alloy with a conductivity close to that of pure copper when smelted at 1220 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 0.8wt.%, Sc: 0.6wt.%, Pd: 0.5wt.%, In: 0.7wt.%, Sr: 1.9wt.%, Cr: 0.6wt .%, Ru: 0.5wt.%, Ir: 0.3wt.%, Pr: 0.1wt.%, B: 0.5wt.%, 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 cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 10m / min. The ingots were deformed at room temperature with a rolling reduction of 8% in each pass. Every 3 passes of rolling requires an ...

Embodiment 2

[0019]A high thermal conductivity Cu-Li-Sc copper-lithium alloy with a 1240-degree melting conductivity close to that of pure copper. In terms of weight percentage, the chemical composition of the alloy is: Li: 0.4wt.%, Sc: 0.3wt.%, Pd: 0.9wt.%, In: 0.5wt.%, Sr: 1.6wt.%, Cr: 0.5wt .%, Ru: 0.4wt.%, Ir: 0.3wt.%, Pr: 0.1wt.%, B: 0.5wt.%, 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 1240 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 1240 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 9m / min. The ingots were deformed at room temperature with a rolling reduction of 8% in each pass. Every 3 passes of rolling requires an intermediat...

Embodiment 3

[0021] A high thermal conductivity Cu-Li-Sc copper-lithium alloy with 1280-degree melting conductivity close to that of pure copper. In terms of weight percentage, the chemical composition of the alloy is: Li: 0.7wt.%, Sc: 0.5wt.%, Pd: 0.8wt.%, In: 0.6wt.%, Sr: 1.7wt.%, Cr: 0.6wt .%, Ru: 0.5wt.%, Ir: 0.3wt.%, Pr: 0.1wt.%, B: 0.6wt.%, 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 cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 9m / min. The ingots were deformed at room temperature with a rolling reduction of 8% in each pass. Every 3 passes of rolling requires an intermediate...

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Abstract

The invention discloses a Cu-Li-Sc copper-lithium alloy with high thermal conductivity close to the conductivity of pure copper. In terms of weight percentage, the chemical composition of the alloy is: Li:0.2‑1.0wt.%, Sc:0.2‑0.8wt.%, Pd:0.4‑1.2wt.%, In:0.4‑0.8wt.%, Sr:1.5‑ 2.0wt.%, Cr: 0.4‑0.8wt.%, Ru: 0.2‑0.6wt.%, Ir: 0.2‑0.5wt.%, Pr: 0.1‑0.2wt.%, B: 0.4‑1.0wt.%, The balance is copper. Compared with traditional copper alloys for cables, this material has excellent mechanical properties, high electrical conductivity and high thermal conductivity.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a copper-lithium alloy. Background technique [0002] With the rapid development of my country's economy and the speed up of railways, the requirements for catenary conductors are getting higher and higher. People are constantly pursuing the wire material that can achieve the best combination of electrical conductivity and strength to meet the increasing requirements of railway transportation speed. At present, in Europe, America, Japan and other developed countries, copper alloy wire materials are usually used to produce catenary wires. The copper alloy wire materials used in my country's high-speed electrified railways are mainly imported from developed countries such as Germany and Sweden. In addition, copper-based electrical contact materials are suitable for working under various power conditions, and are widely used in large and medium load electrical appliances, such as va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/02C22F1/08
CPCC22C9/00C22C1/02C22F1/08
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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