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Corrosion-resistant Ag-Li-Y silver-lithium alloy approximating pure-silver electric conductivity

A technology of electrical conductivity and lithium alloy, which is applied in the field of alloys, can solve the problems that the electrical conductivity cannot meet the requirements, and achieve the effects of high thermal cracking tendency, excellent flame retardancy, good plasticity and viscosity

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

[0006] However, as a silver alloy for electrical contact materials, only satisfactory electrical conductivity is far from meeting the requirements. More importantly, the final silver-lithium alloy product must also have satisfactory mechanical strength and other properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A corrosion-resistant Ag-Li-Y silver-lithium alloy with 1080-degree melting conductivity close to that of pure silver. In terms of weight percentage, the chemical composition of the alloy is: Li: 2.1wt.%, Y: 0.3wt.%, Mg: 0.9wt.%, Ti: 0.3wt.%, Ca: 0.9wt.%, Ge: 0.2wt .%, Pt: 0.3wt.%, Th: 0.2wt.%, Er: 0.2wt.%, B: 0.3wt.%, the balance is silver. 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 1080 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 1080 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 deformed at room temperature with a rolling reduction of 9% per pass. Every 3 passes of rolling requires an intermediate heat treatme...

Embodiment 2

[0019] A corrosion-resistant Ag-Li-Y silver-lithium alloy with a conductivity close to that of pure silver melted at 1100 degrees. The chemical composition of the alloy is: Li: 2.3wt.%, Y: 0.4wt.%, Mg: 0.9 wt.%,Ti:0.4wt.%,Ca:1.4wt.%,Ge:0.2wt.%,Pt:0.3wt.%,Th:0.2wt.%,Er:0.3wt.%,B:0.5wt .%, the balance being silver. 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 1100 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 1100 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 12m / min. The ingots were deformed at room temperature with a rolling reduction of 10% in each pass. Every 3 passes of rolling requires an intermediate heat treatment to eliminate work hardening, the ...

Embodiment 3

[0021]A corrosion-resistant Ag-Li-Y silver-lithium alloy with a conductivity close to that of pure silver melted at 1120 degrees. In terms of weight percentage, the chemical composition of the alloy is: Li: 2.9wt.%, Y: 0.3wt.%, Mg: 0.9wt.%, Ti: 0.2wt.%, Ca: 1.2wt.%, Ge: 0.2wt .%, Pt: 0.3wt.%, Th: 0.2wt.%, Er: 0.3wt.%, B: 0.5wt.%, the balance is silver. 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 13m / min. The ingots were deformed at room temperature with a rolling reduction of 10% in each pass. Every 3 passes of rolling requires an intermediate h...

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Abstract

The invention discloses corrosion-resistant Ag-Li-Y silver-lithium alloy approximating pure-silver electric conductivity. The corrosion-resistant Ag-Li-Y silver-lithium alloy comprises the chemical components of, by weight, 0.5%-3.2% of Li, 0.2%-0.5% of Y, 0.8%-1.2% of Mg, 0.2%-0.4% of Ti, 0.8%-1.5% of Ca, 0.1%-0.3% of Ge, 0.2%-0.4% of Pt, 0.1%-0.5% of Th, 0.1%-0.4% of Er, 0.2%-0.6% of B, and thebalance silver. Compare with traditional electric-contact silver alloy, the corrosion-resistant Ag-Li-Y silver-lithium alloy has excellent mechanical performance, high electric conductivity and very high corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a silver-lithium alloy. Background technique [0002] Electrical contact elements, also known as contacts or contacts, play the role of connecting, breaking, guiding and isolating current in high and low voltage electrical appliances, and are one of the key components of high and low voltage electrical appliances. Electrical contact elements are mainly made of electrical contact materials. Electrical contact materials are key functional materials of electrical alloys and are used for high and low voltage switch contacts. Their performance directly affects the technical level of power generation equipment and power transmission and transformation equipment. Electrical contact materials must have good electrical conductivity, thermal conductivity, arc burn resistance, welding resistance, small electrical wear, low and stable contact resistance, no chemical changes with the medium us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/06C22C1/02C22F1/14C22F1/02
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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