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Fine-grained silver-based electrical contact material and preparation method thereof

An electrical contact material, silver-based technology, applied in the field of fine-grained silver-based electrical contact materials and its preparation, can solve the problems that have not been found in the same or similar reports, and achieve the purpose of avoiding uneven tissue distribution, fine grains, and suppressing crystal grains. The effect of grain growth

Inactive Publication Date: 2018-02-27
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After retrieval, no report identical or similar to the subject of the present invention has been found in the prior art

Method used

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  • Fine-grained silver-based electrical contact material and preparation method thereof
  • Fine-grained silver-based electrical contact material and preparation method thereof
  • Fine-grained silver-based electrical contact material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Taking the preparation of fine-grained AgCu3 electrical contact material as an example

[0033] 1. Weigh 48.5Kg silver ingot, place it in a medium-frequency induction furnace and heat it up to 1100°C to melt, then add 1.5Kg copper block, after 40 minutes of homogenization and heat preservation, a silver-copper metal melt is obtained;

[0034] 2. The molten metal is quickly cooled by the crystallizer on the bottom side of the induction furnace through the water cooling device to form a billet;

[0035] 3. The forming blank is continuously pulled out with a wire rod of Φ12.5mm by the traction device, and the material is collected to form a coil to obtain a silver-copper alloy wire coil;

[0036] 4. Diffusion annealing is carried out on the silver-copper alloy wire, the annealing temperature is 600°C, the time is 2h, and the protective atmosphere is hydrogen, so that the material can be stress-relieved and maintain certain physical and mechanical properties;

[0037] 5. P...

Embodiment 2

[0041] Taking the preparation of fine-grained AgNi0.3 electrical contact material as an example

[0042] 1. Weigh 49.85Kg of silver ingot, put it in a medium frequency induction furnace and heat it up to 1150°C to melt, then add 0.15Kg of nickel block, after 40 minutes of homogenization and heat preservation, the silver-nickel metal melt is obtained;

[0043] 2. The molten metal is quickly cooled by the crystallizer on the bottom side of the induction furnace through the water cooling device to form a billet;

[0044] 3. The forming blank is continuously pulled out with a wire rod of Φ12.5mm by the traction device, and the material is collected to form a coil to obtain a silver-nickel alloy wire coil;

[0045] 4. Diffusion annealing is performed on the silver-nickel alloy wire, the annealing temperature is 500°C, and the time is 2.5h, so that the material can be stress-relieved and maintain certain physical and mechanical properties;

[0046] 5. Perform large plastic deformat...

Embodiment 3

[0050] Taking the preparation of fine-grained AgNi0.15 electrical contact material as an example

[0051] 1. Weigh 49.925Kg of silver ingot, put it in a medium frequency induction furnace and heat it up to 1150°C to melt, then add 0.075Kg of nickel block, after 30 minutes of homogenization and heat preservation, silver-nickel metal melt is obtained;

[0052] 2. The molten metal is quickly cooled by the crystallizer on the bottom side of the induction furnace through the water cooling device to form a billet;

[0053] 3. The forming blank is continuously pulled out with a wire rod of Φ12.5mm by the traction device, and the material is collected to form a coil to obtain a silver-nickel alloy wire coil;

[0054] 4. Diffusion annealing is performed on the silver-nickel alloy wire, the annealing temperature is 460°C, and the time is 3 hours, so that the material can be stress-relieved and maintain certain physical and mechanical properties;

[0055]5. Through multiple extrusion-an...

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Abstract

The invention provides a fine-grained silver-based electrical contact material and a preparation method thereof. The method comprises the following steps of 1, carrying out smelting and insulating onmetal silver and copper or silver and nickel so as to obtain the molten metal; 2, rapidly cooling the molten metal into a blank so as to inhibiting the grain growth in the alloy structure; 3, pullingout the blank to form a wire; 4, carrying out heat treatment on the wire; 5, performing large-plastic deformation on the heat-treated wire to obtain the fine-grained silver-based electric contact material. According to the fine-grained silver-based electrical contact material and the preparation method thereof, the horizontal continuous casting and large-plastic deformation technologies are combined, the prepared silver-based electric contact material has the advantages of being fine in crystal grain, compact in structure and good in mechanical property, the electric performance is greatly improved, and the material can be widely applied to a self-control switch, a thermostat, a thermostat, a baking machine, a baking oven timer, a computer and the like.

Description

technical field [0001] The invention relates to the technical field of electrical contact materials, in particular to a fine-grained silver-based electrical contact material and a preparation method thereof. Background technique [0002] Electrical contact materials are responsible for the tasks of connecting, breaking, carrying and isolating current in switching appliances. They are key functional materials in switching appliances. Their performance directly affects the safety, reliability and life of switching appliances. [0003] Fine-grained silver refers to a fine-grained silver-based alloy formed by adding a small amount of alloying elements to pure silver, especially nickel and copper. Fine-grained silver has excellent electrical and thermal conductivity, low and stable contact resistance, good welding and processing performance, and its mechanical strength and temperature resistance are higher than pure silver. Fine-grained silver is one of the most commonly used ma...

Claims

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Application Information

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IPC IPC(8): C22F1/14C22C5/06C22C5/08C22C1/02
CPCC22C1/02C22C5/06C22C5/08C22F1/14
Inventor 陈晓张泽忠吴新合穆成法祁更新
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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