High-power hard copper, tungsten and ferrum compound electric contact material
An electrical contact material, copper tungsten iron technology, applied in the direction of contacts, circuits, electrical switches, etc., can solve the problems of high gas content of contact materials, high dispersion of material properties, high price, etc., to simplify the structure of electrical switches , Comprehensive performance improvement, high performance uniformity effect
Inactive Publication Date: 2012-02-08
张国柱
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Problems solved by technology
Several materials have their own advantages and disadvantages. The silver tungsten carbide material uses the precious metal silver as the conductor material, which is too expensive; the copper-bismuth alloy has excellent performance, but the current breaking capacity is not ideal; , the current intermittent characteristics (cut-off value) are not ideal, and due to the infiltration process, copper accumulation is prone to occur; copper-chromium alloy materials have great potential, but now it is difficult to control impurities in chromium materials and the gas content of contact materials is high, resulting in material High performance dispersion
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[0015] from figure 1 It can be seen from the figure that a high-power hard copper-tungsten-iron composite electrical contact material is characterized in that: the electrical contact material is composed of a layer of copper-tungsten alloy layer 1 sintered on an iron-alloy layer 2 .
[0016] from figure 2 It can be seen from the figure that the manufacturing process of a high-power hard copper-tungsten-iron composite electrical contact material is as follows: firstly, copper powder with appropriate particle size, tungsten carbide powder and tungsten are mixed in a certain proportion.
[0017] Then the above mixed powder is subjected to multiple heat treatments, press molding and crushing, and finally pressed into a copper-tungsten alloy material with a porosity up to the standard, and pre-sintered so that copper is completely infiltrated into the alloy material to form a copper-tungsten alloy billet.
[0018] The prepared ferroalloy alloy and the pre-fired billet are sintere...
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The invention discloses a high-power hard copper, tungsten and ferrum compound electric contact material. A layer of copper and tungsten alloy layer is sintered on a ferrum alloy layer; as the ferrum alloy is used as a base material, the compound electric contact material has the characteristics of high hardness and high abrasion resistance; due to adoption of a copper material, comprehensive performance, such as the current breaking capacity, the conductivity, the current intermittent characteristic and the like, of the manufactured electric contacts is improved; and within the service life cycle, the performance uniformity of the electric contact material is high. By adoption of the contact material, a switch structure of an electric appliance is simplified, the dispersibility of springs in a switch is eliminated and the reliability of parts is improved greatly. The material is widely applied to manufacturing of electric contacts of various vacuum circuit breakers.
Description
technical field [0001] The invention relates to an electrical contact material in a vacuum circuit breaker, in particular to a high-power silver-free electrical contact material. Background technique [0002] In vacuum circuit breakers, there are many requirements for contact materials, mainly in three aspects: high current breaking characteristics (current breaking capacity), current intermittent characteristics (cut-off value) and high current-carrying properties (conductivity) sex). [0003] The materials currently used for vacuum circuit breakers are mainly silver tungsten carbide materials, copper bismuth alloys, copper tungsten alloys and copper chromium alloys. Several materials have their own advantages and disadvantages. The silver tungsten carbide material uses the precious metal silver as the conductor material, and the price is too expensive; the copper-bismuth alloy has excellent performance, but the current breaking capacity is not ideal; , the current interm...
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IPC IPC(8): H01H1/025
Inventor 张国柱
Owner 张国柱