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High heat-conducting Au-Li-Se gold lithium alloy for electrical contact material

A technology of electrical contact material and high thermal conductivity, applied in the field of alloys, can solve the problems such as the inability to meet the requirements of combustion resistance, and achieve the effect of solving the problem of large hot cracking tendency, good flame retardant effect, and low liquid-solid solidification temperature range

Inactive Publication Date: 2018-02-02
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 enough to meet the requirements of only having combustion resistance during smelting. More importantly, the final gold-lithium alloy product must also have satisfactory mechanical strength, at least reaching the level commonly used. Mechanical properties of gold-lithium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A high thermal conductivity Au-Li-Se gold-lithium alloy for electric contact materials with 1120 degree melting. In terms of weight percentage, the chemical composition of the alloy is: Li: 0.3wt.%, Se: 0.4wt.%, Bi: 1.8wt.%, Nb: 0.3wt.%, Mg: 2.4wt.%, Fe: 0.6wt .%, Be: 0.1wt.%, Al: 0.4wt.%, Si: 0.3wt.%, B: 0.3wt.%, the balance is gold. 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 1120 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 1120 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 12m / min. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 15%. Every 3 passes of rolling requires a...

Embodiment 2

[0019]A high thermal conductivity Au-Li-Se gold-lithium alloy for electrical contact materials with 1150 degree melting. In terms of weight percentage, the chemical composition of the alloy is: Li: 0.4wt.%, Se: 0.3wt.%, Bi: 2.4wt.%, Nb: 0.3wt.%, Mg: 1.9wt.%, Fe: 0.6wt .%, Be: 0.1wt.%, Al: 0.4wt.%, Si: 0.5wt.%, B: 0.3wt.%, the balance is gold. 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 1150 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 1150°C 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 14m / min. The ingot was deformed at room temperature, and the rolling reduction in each pass was 16%. Every 3 passes of rolling requires an intermediate heat treatment t...

Embodiment 3

[0021] A high thermal conductivity Au-Li-Se gold-lithium alloy for electrical contact materials with 1180-degree melting. In terms of weight percentage, the chemical composition of the alloy is: Li: 0.3wt.%, Se: 0.4wt.%, Bi: 2.3wt.%, Nb: 0.4wt.%, Mg: 2.6wt.%, Fe: 0.4wt .%, Be: 0.1wt.%, Al: 0.5wt.%, Si: 0.3wt.%, B: 0.4wt.%, the balance is gold. 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 1180 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 1180 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 12m / min. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 18%. Every 3 passes of rolling requires...

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Abstract

The invention discloses a high thermal conductivity Au-Li-Se gold-lithium alloy for electrical contact materials. In terms of weight percentage, the chemical composition of the alloy is: Li:0.2‑0.4wt.%, Se:0.2‑0.5wt.%, Bi:1.0‑2.5wt.%, Nb:0.2‑0.5wt.%, Mg:1.5‑ 3.5wt.%, Fe: 0.2‑0.8wt.%, Be: 0.1‑0.2wt.%, Al: 0.2‑0.6wt.%, Si: 0.2‑0.6wt.%, B: 0.2‑0.5wt.%, The balance is gold. Compared with traditional electrical contact gold alloys, the 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 gold-lithium alloy. Background technique [0002] Electrical contact materials are one of the important materials in the process of current transmission and conversion. Electrical contact materials are the key materials for the preparation of electric power, electrical circuit on-off control and load current electrical appliances (such as switches, relays, starters, instruments, etc.). In the electrical and electronic fields, electrical contact materials are mainly used as electrical contacts, conductive brushes, collector rings, commutator segments, rectifier segments and connectors, etc., and are important functional components in the electrical on-off link. Motors, electrical switches, relays, connectors, etc. using electrical contact elements are widely used in information engineering, household electronic appliances, automotive engineering and other fields as basic compone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/02C22C1/02C22F1/14C22F1/02
CPCC22C5/02C22C1/02C22F1/02C22F1/14
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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