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High-performance CuCr25 alloy contact materials and rapid solidifying preparation

A technology for vacuum circuit breaker and contact material, which is applied in the field of preparation of CuCr alloy bulk material for high-power vacuum circuit breaker switch contact material, can solve the problems of high cost, low yield, and difficulty in obtaining high-quality contact material. , to achieve the effect of high withstand voltage, breakdown resistance, and high density

Inactive Publication Date: 2006-08-30
GRIMAT ENG INST CO LTD
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Problems solved by technology

The first two methods are limited by the large Cr particles in the raw material, it is difficult to obtain high-quality contact materials, and the yield is low, while the self-consumable electrode method has a complicated preparation process and high cost

Method used

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  • High-performance CuCr25 alloy contact materials and rapid solidifying preparation
  • High-performance CuCr25 alloy contact materials and rapid solidifying preparation
  • High-performance CuCr25 alloy contact materials and rapid solidifying preparation

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Embodiment

[0035] According to the alloy composition, by weight percentage, the alloy composition is Cu75wt%, Cr25wt%, and the ingredients are mixed; under the protection of inert gas, the above raw materials are put into the temperature to 2100 °C to melt the raw materials and cast them into prefabricated ingots; prepare alloy prefabricated ingots Later, if figure 1 As shown, first vacuumize the melting tank body 1, and the vacuum degree is 10 -3 pa, and then filled with high-purity argon gas to normal pressure, under the protection of inert gas, the alloy prefabricated ingot was melted in the induction heating melting furnace 4, the temperature of the induction heating melting furnace 4 was controlled at 2300 ° C, and kept for 10 minutes; The heating tundish 6 is heated, and the temperature of the induction heating tundish 6 is controlled at 2100° C., and the molten melt passes through the guide tube 5 , and the temperature of the guide tube 5 is controlled at 2100° C. High-purity arg...

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Abstract

A high-performance CuCr25 alloy material used for the contact of high-power vacuum breaker contains Cu (72-77 wt.%) and Cr (23-28 wt.%) and is prepared through proportioning, smelting in inertial gas, casting alloy ingot, smelting the alloy ingot at 2200 deg.C in inertial gas, and fast-solidifying spray shaping by using high-purity inertial gas as atomizing gas under 0.5-10 MPa of atomizing pressure. Its advantages are fine and uniform microstructure, and high resistance to high voltage and electric breaking-through.

Description

technical field [0001] The invention relates to a method for preparing a high-performance CuCr25 alloy block contact material, more specifically a method for preparing a CuCr alloy block material for a high-power vacuum circuit breaker contact material. Background technique [0002] Cu-Cr alloy contacts (Cr content 25-50wt%) have the advantages of large breaking current capacity, high withstand voltage strength, and low arc burning rate. Key components where performance plays a decisive role. [0003] High-quality Cu-Cr alloy contacts (materials) must meet the following three basic requirements at the same time: (1) The particle size of the second phase Cr is as small as possible and uniformly distributed on the contact surface; content; (3) have as high a density as possible. Since CuCr alloy belongs to monotectic alloy, it is basically impossible to prepare it by traditional ingot casting process. At present, there are three main preparation methods of CuCr alloy in the...

Claims

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Application Information

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IPC IPC(8): C22C9/00
Inventor 张永安熊柏青石力开刘红伟朱宝宏徐骏
Owner GRIMAT ENG INST CO LTD
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