Preparing method of silver-base metal acid-salt electrical-contact composite material

A technology of composite materials and acid salts, which is applied in the field of metallurgy to achieve the effects of lowering the use temperature, reducing plasticity deterioration, and improving contact strength

Inactive Publication Date: 2010-02-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a silver-based metal salt electrical contact composite material, which can replace the toxic silver cadmium oxide electrical contact material. The temperature rise problem improves the overall performance of the material and overcomes the current problems in the processing and use of electrical contact materials

Method used

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  • Preparing method of silver-base metal acid-salt electrical-contact composite material

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Embodiment 1

[0038] By 12% silver stannate (Ag 2 SnO 3) powder (percentage by weight), 87% silver powder (percentage by weight), 1% tungsten powder (percentage by weight), put the powder into a mixer and mix it; with a power of 1KW, a frequency of 20KHz ultrasonic vibration powder for 10 minutes , to make it homogeneous. Two-way pressing in a steel mold forms a biscuit, and the forming pressure of the biscuit is 600MPa; the biscuit is sintered at 750°C for 4 hours to become an ingot; It is extruded into a wire rod at a temperature of 500°C, and finally cold-drawn into a wire (silk) material.

Embodiment 2

[0040] By 15% silver copper oxide (Ag 2 CuO 3 and AgCuO 2 ) powder (percentage by weight), 80% silver powder (percentage by weight), 4.5% silver-tin alloy powder (percentage by weight), 0.5% molybdenum powder (percentage by weight), the powder is put into a mixer and mixed; 3KW, frequency 25KHz ultrasonic vibration powder for 30 minutes to make it homogeneous. Two-way pressing in a steel mold forms a biscuit, and the forming pressure of the biscuit is 650MPa; the biscuit is sintered at 750°C for 4 hours to become an ingot; It is extruded into a wire rod at a temperature of 550°C, and finally cold-drawn into a wire (silk) material.

Embodiment 3

[0042] By 15% copper stannate (CuSnO 3 ) powder (percentage by weight), 84% silver powder (percentage by weight), 0.5% tungsten powder (percentage by weight), 0.5% molybdenum powder (percentage by weight), the powder is put into the mixer and mixed; power is 1KW , Ultrasonic vibration powder with a frequency of 20KHz for 25 minutes to homogenize it. Two-way pressing in a steel mold forms a biscuit, and the forming pressure of the green body is 600MPa; the green body is sintered at 700°C for 4 hours to become an ingot; the ingot is repressed at a pressure of 600MPa, refired at 650°C for 8 hours, and then It is extruded into a wire rod at a temperature of 500°C, and finally cold-drawn into a wire (silk) material.

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Abstract

The invention relates to an electrical-contact composite material, in particular to a preparing method of a silver-base metal acid-salt electrical-contact composite material, which belongs to the technical field of material smelting. The method comprises the following steps: mixing silver-base powder of which the granularity is lower than 20 micrometer and metal acid-salt powder in a powder mixerto lead the tin or copper element content to be 6 to 15 percent of the total weight, uniformly mixing the silver-base powder and the metal acid-salt powder by ultrasonic waves of which the frequency is from 10 to 30 KHz, and compressing the mixed powder into biscuits; sintering the biscuits at a temperature from 500 to 800 DEG C into ingot billets, and recompressing and resintering the ingot billets at a temperature from 500 to 800 DEG C; and sending the recompressed and resintered billets into an extruder to directly extrude out wire rods, and processing the wire rods into finished products.The method has simple technology and excellent processing performance, better solves the problem of the temperature rise of the electrical-contact material, improves the integrated performance of thematerial, and overcomes the problem in the processing and the use of the electrical-contact material in prior.

Description

technical field [0001] The invention relates to an electrical contact composite material, in particular to a preparation method of a silver-based metal salt electrical contact composite material, and belongs to the technical field of metallurgy. Background technique [0002] The electrical contact is one of the key components of electrical equipment, and its function is to switch on and off the current. It is not only a carrier fluid, but also a mechanical component. It must have good electrical and thermal conductivity, arc burning resistance, welding resistance, small electrical wear, low and stable contact resistance, no chemical changes with the medium used, and certain Strength and ease of machining and other characteristics. The known electrical contact materials have a development history of nearly 100 years. At first, pure gold, pure silver, and pure platinum were used as contact materials. In the 1940s, alloys such as Ag-Cu, Au-Ag, Pt-Ir, and Pt-Ag were used. Sinc...

Claims

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Application Information

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IPC IPC(8): H01H11/04B22F3/16
Inventor 冯晶陈敬超于杰肖冰阮进周荣
Owner KUNMING UNIV OF SCI & TECH
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