A kind of ablation-resistant tungsten-copper alloy and its application

A tungsten-copper alloy, ablation-resistant technology, applied in the direction of spark gap parts, electrical components, spark gaps, etc., can solve the problems that affect the safe and long-term operation of the line, cannot meet the needs of industrialization, and have poor ablation resistance, etc., to achieve good durability Ablative properties, easy operation, and the effect of prolonging the service life

Active Publication Date: 2017-01-18
泉州亿兴电力工程建设有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the materials used for parallel gap lightning protection devices of overhead transmission lines are mostly made of carbon steel, which has poor ablation resistance. The power frequency arc caused by lightning flashover or pollution flashover can easily cause parts to burn out, thus affecting the line. Safe and long-term operation
And with the rapid development of modernization, the load of high-voltage transmission and transformation grid lines is increasing day by day. Under the action of high voltage and high current, the arc ablation of the traditional carbon steel arc angle will cause serious ablation pits on the surface of the arc angle. And premature failure can no longer meet the needs of industrialization

Method used

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  • A kind of ablation-resistant tungsten-copper alloy and its application

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Effect test

Embodiment 1

[0029] Preparation of W80Cu18.7Ni0.3TiB with a diameter of 30 mm and a mass percentage of 80:18.7:0.3:1 2 1 an ablation-resistant tungsten-copper alloy ball, comprising the following steps:

[0030] (1) Calculate the masses of tungsten, copper, nickel and titanium diboride according to the mass of the prepared ablation-resistant tungsten-copper alloy ball and the mass percentage of the components to be 261.44g, 61.11g, 0.98g, and 3.27g, respectively.

[0031] (2) Weigh 261.44g of tungsten powder with a particle size of 4-7μm, 3.06g of copper powder with a particle size of 65-74μm as pre-added copper powder (weighed by 5% of the copper mass), and 63.86g of copper powder as pressed powder. Billet copper powder (weighed by 1.1 times the mass of the remaining copper), 0.98g of nickel powder with a particle size of 1-3μm, 3.27g of titanium diboride powder with a particle size of 3-6μm, and a molding agent zinc stearate 3.27 g.

[0032] (3) Put the tungsten powder, pre-added coppe...

Embodiment 2

[0038] Preparation of W80Cu17.7Ni0.3TiB with a diameter of 30 mm and a mass percentage of 80:17.7:0.3:2 2 2 Ablation-resistant tungsten-copper alloy balls, comprising the following steps:

[0039] (1) Calculate the masses of tungsten, copper, nickel and titanium diboride according to the mass of the prepared ablation-resistant tungsten-copper alloy ball and the mass percentage of the components to be 257.11g, 56.89g, 0.96g, and 6.43g, respectively.

[0040] (2) Weigh 257.11g of tungsten powder with a particle size of 4-7μm, 2.84g of copper powder with a particle size of 65-74μm as pre-added copper powder (weighed by 5% of the copper mass), and 59.5g of copper powder as pressed powder. Billet copper powder (weighed by 1.1 times the mass of the remaining copper), 0.96g of nickel powder with a particle size of 1-3μm, 6.43g of titanium diboride powder with a particle size of 3-6μm, and weigh the forming agent zinc stearate 3.21 g.

[0041] (3) Put the tungsten powder, pre-added ...

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Abstract

The invention discloses an ablation-resistant tungsten copper alloy and application thereof. The ablation-resistant tungsten copper alloy comprises the following components in percentage by mass: 78-83 percent of tungsten, 16.6-21.75 percent of copper, 0.25-0.4 percent of nickel and 0.1-4 percent of titanium diboride. The preparation method comprises the following steps: pressing tungsten powder, nickel powder, titanium diboride powder and preloaded copper powder, presintering to form a porous tungsten skeleton; infiltrating and sintering a copper green compact into the porous tungsten skeleton, thereby obtaining the ablation-resistant tungsten copper alloy. The prepared ablation-resistant tungsten copper alloy can effectively resist arc ablation caused by overvoltage generated during lightning stroke, so that an insulator chain is prevented from being subjected to breakdown, and the aim of prolonging the service life of a lightning protection device is achieved. Moreover, the ablation-resistant tungsten copper alloy has excellent ablation resistance and can serve as a good discharge material.

Description

technical field [0001] The invention relates to the technical field of material preparation of lightning protection devices for power system distribution, in particular to a preparation method and application of an ablation-resistant tungsten-copper alloy. Background technique [0002] Overhead transmission lines are mostly located in remote areas, which are prone to lightning flashover and pollution flashover, threatening the safety of the power system. Arc angle), when the overhead line is struck by lightning, a high lightning overvoltage is generated on the insulator string, but because the lightning impulse discharge voltage of the protection gap is lower than the discharge voltage of the insulator string, the protection gap discharges first. Under the action of electric force and thermal stress, the continuous power frequency arc is led to the end of the arc angle through the discharge channel formed by the parallel gap, and fixed at the end of the arc angle to burn, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/04C22C1/05H01T1/15
Inventor 王铮林盛强林志鹏张大童胡诗邱添官强华陈宁钊陈玥玟叶玉云胡志忠
Owner 泉州亿兴电力工程建设有限公司
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