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Cu-Li-Ge copper-lithium alloy replacing beryllium bronze

A technology of copper-lithium alloy and beryllium bronze, which is applied in the field of alloys, can solve problems such as unsatisfactory requirements, and achieve the effects of increasing lithium yield, reducing usage, and refining grains

Inactive Publication Date: 2018-03-06
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-Ge copper-lithium alloy with 1240-degree melting, flame retardancy, high strength and high conductivity. In terms of weight percentage, the chemical composition of the alloy is: Li:0.9wt.%, Ge:2.4wt.%, Sr: 2.3wt.%, Ce:0.3wt.%, Ho:0.2wt.%, Pr:0.3wt .%, V: 0.7wt.%, S: 1.3wt.%, 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 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 intermediate heat treatment t...

Embodiment 2

[0019]A Cu-Li-Ge copper-lithium alloy with 1250-degree melting flame retardancy, high strength and high conductivity. In terms of weight percentage, the chemical composition of the alloy is: Li: 1.3wt.%, Ge: 2.6wt.%, Sr: 2.1wt.%, Ce: 0.3wt.%, Ho: 0.2wt.%, Pr: 0.2wt .%, V: 0.7wt.%, S: 1.3wt.%, 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 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 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 intermediate heat treatmen...

Embodiment 3

[0021] A Cu-Li-Ge copper-lithium alloy with 1270-degree melting, flame-retardant, high-strength and high-conductivity. In terms of weight percentage, the chemical composition of the alloy is: Li:0.6wt.%, Ge:2.4wt.%, Sr: 2.5wt.%, Ce:0.3wt.%, Ho:0.2wt.%, Pr:0.3wt .%, V: 0.6wt.%, S: 1.3wt.%, 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 1270 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 1270 degrees for 10 minutes and cast into the same level equipment 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 intermediate heat treatment to elimin...

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Abstract

A Cu-Li-Ge copper-lithium alloy replacing beryllium bronze, the chemical composition of the alloy is: Li:0.2-1.6wt.%, Ge:2.0-3.0wt.%, Sr:2.0-3.0wt. .%, Ce: 0.2‑0.4wt.%, Ho: 0.2‑0.3wt.%, Pr: 0.2‑0.4wt.%, V: 0.6‑0.8wt.%, S: 0.8‑2.6wt.%, balance for copper. The material has excellent mechanical properties and electrical conductivity. Elastic modulus: 125‑138GPa; Yield strength: 950‑1080MPa; Tensile strength: 1100‑1200MPa; Elongation: 4‑10%; Conductivity (%IACS): 50‑80, while traditional beryllium copper is 18‑25 .

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a copper-lithium alloy. Background technique [0002] Beryllium is a steel-gray metal that is lighter than commonly used aluminum and titanium, but four times stronger than steel. Many braking devices of supersonic aircraft are made of beryllium, because it has excellent heat absorption and heat dissipation performance, and the heat generated during braking will be dissipated quickly. Copper is much softer than steel, and is less elastic and less resistant to corrosion. However, when 1-3.5wt.% beryllium is added to the copper alloy, the properties of the copper alloy change significantly. Beryllium bronze is one of the elastic alloys with the best performance among copper alloys, which has good thermal conductivity, electrical conductivity, non-magnetism, and small elastic hysteresis. Beryllium bronze alloy is used to make springs that work at high temperatures. This kind of sp...

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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