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Additive manufacturing method for electrical contact made of copper-tungsten functionally gradient material

A functionally graded material, additive manufacturing technology, applied in metal material coating process, circuits, electrical switches, etc., can solve problems such as poor high-voltage breaking capacity and short service life

Inactive Publication Date: 2016-06-22
XI AN JIAOTONG UNIV +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for additively manufacturing copper-tungsten functionally graded material electrical contacts to improve the reliability of electrical contact parts in view of the problems of poor high-voltage breaking capability and short service life of existing copper-tungsten electrical contacts. High voltage breaking capacity and service life

Method used

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  • Additive manufacturing method for electrical contact made of copper-tungsten functionally gradient material
  • Additive manufacturing method for electrical contact made of copper-tungsten functionally gradient material

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] refer to Figure 1-Figure 2 , the copper powder and tungsten powder in the two powder feeding cylinders 9 of the double-barrel powder feeder 10 are conveyed through the powder feeding pipe 7, and the conveyed copper powder and tungsten powder are firstly mixed by the powder mixer 8 and then After passing through the powder separator 6, it is divided into 4 to 8 paths of powder flow. In the process of additively manufacturing copper-tungsten gradient materials, the high-energy beam 5 melts and deposits a mixed powder of copper powder and tungsten powder on the copper substrate 1 in the atmosphere protection studio 4; the gas punched in the atmosphere protection studio 4 can It is nitrogen or argon, and its purpose is to prevent oxidation of copper-tungsten functionally graded material electrical contacts manufactured by additiv...

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Abstract

The invention discloses an additive manufacturing method for an electrical contact made of a copper-tungsten functionally gradient material. According to the method, by controlling the powder feeding speed of copper powder and the powder feeding speed of tungsten powder, the copper powder and the tungsten powder are mixed evenly and distributed through a powder distributor, a high-energy beam is used as a heat source, the mass fraction of tungsten molten and deposited on a copper substrate is increased as the number of formation layers is increased, and the electrical contact made of the copper-tungsten functionally gradient material changes gradiently. The tungsten content in the copper-tungsten functionally gradient material changes gradiently in a quasi-continuous or stepped mode along with the formation height. Through the method, the high-voltage breaking capacity of an electrical contact part is improved, and the service life of the electrical contact part is prolonged.

Description

technical field [0001] The invention relates to a method for preparing copper-tungsten functionally graded materials. Based on the principle of additive manufacturing technology, the copper powder is melted and deposited on a copper substrate by using a high-energy beam by adjusting the powder feeding ratio of synchronously conveyed copper powder and tungsten powder. The mixed powder with tungsten powder realizes the method of directly forming electrical contacts of copper-tungsten functionally graded materials under the protection of an inert atmosphere without a mold. Background technique [0002] Since tungsten-based composite materials began to be studied in the 1930s, copper-tungsten electrical contacts are now widely used in the core components of high-voltage, ultra-high voltage, and ultra-high voltage power transmission and transformation industries and related fields. It is the most widely used electrical contact material, and it is widely used in high-voltage SF6, ...

Claims

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Application Information

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IPC IPC(8): C23C24/10H01H11/04
CPCH01H11/048C23C24/106
Inventor 李涤尘张安峰严深平姚金刚曹伟产
Owner XI AN JIAOTONG UNIV
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