Copper-based contact material applied to lower-voltage apparatus and preparation method of copper-based contact material

A technology of contact material and low-voltage electrical appliances, which is used in cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of increased contact resistance and increased temperature of contacts, and achieves low contact resistance between contacts and high contact Low temperature rise, less oxidative denaturation

Inactive Publication Date: 2014-09-24
哈尔滨东大高新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contact material is generally added a certain amount of high melting point reinforcement phase (such as carbon, tungsten, tin oxide, zinc oxide, etc.) Arc ablation, but under long-term use conditions, due to the repeated action of the arc, these rein

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] To make contacts with 1% titanium carbide and copper balance by weight percentage:

[0023] a. Powder mixing: Put 99 kg of -200 mesh electrolytic copper powder and 1 kg of titanium carbide powder with an average particle size of 1.2 microns into a V-shaped forced powder mixing machine for 2 hours;

[0024] B. Pressing: Weigh the uniformly mixed powder, 10 kilograms per portion of powder, put it into the die sleeve of the cold isostatic press, hold the pressure for 5 minutes under the pressure of 300MPa, and press it into a cylindrical ingot;

[0025] c. Sintering: sinter the ingot under the protection of argon for 3 hours, and the sintering temperature is 920 degrees;

[0026] d. Extrusion: After heating the sintered ingot to 830 degrees, put it into a hot extrusion machine for extrusion, and extrude it into a plate with a width of 68mm and a thickness of 4mm;

[0027] e. Rolling: cold-roll the extruded plate to the thickness of 1.0mm specified in the drawing;

[0028...

Embodiment 2

[0030] To make a contact with 40% titanium carbide and copper balance by weight percentage:

[0031] a. Powder mixing: Put 60 kg of -200 mesh electrolytic copper powder and 40 kg of titanium carbide powder with an average particle size of 1.0 microns into a V-type forced powder mixing machine for 4 hours;

[0032] B, pressing: Weigh the evenly mixed powder, 10 kilograms of every portion of powder, put it into the die sleeve of the cold isostatic press, hold the pressure for 5 minutes under the pressure of 340MPa, and press it into a cylindrical ingot;

[0033] c. Sintering: sinter the ingot under the protection of argon for 3 hours, and the sintering temperature is 950 degrees;

[0034] d. Extrusion: After heating the sintered ingot to 840 degrees, put it into a hot extrusion machine for extrusion, and extrude it into a plate with a width of 68mm and a thickness of 4mm;

[0035] e. Rolling: cold-roll the extruded plate to the thickness of 2.5mm specified in the drawing;

[0...

Embodiment 3

[0038] Make contacts with 1% titanium carbide, 0.01% graphite, and copper balance by weight percentage:

[0039] a. Powder mixing: Put 98.99 kg of -200 mesh electrolytic copper powder, 1 kg of titanium carbide powder with an average particle size of 1.0 microns, and 0.01 kg of graphite powder with an average particle size of 0.8 microns, and put them into a V-shaped forced powder mixer for 2 hours of powder mixing ;

[0040] B, pressing: Weigh the evenly mixed powder, 10 kilograms of every portion of powder, put it in the die sleeve of the cold isostatic press, hold the pressure for 5 minutes under the pressure of 340MPa, and press it into a cylindrical ingot;

[0041] c. Sintering: sinter the ingot under the protection of argon for 3 hours, and the sintering temperature is 900 degrees;

[0042] d. Extrusion: After heating the sintered ingot to 840 degrees, put it into a hot extrusion machine for extrusion, and extrude it into a plate with a width of 68mm and a thickness of 4...

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PUM

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Abstract

The invention provides a copper-based contact material applied to a lower-voltage apparatus and a preparation method of the copper-based contact material. The copper-based contact material comprises, by weight, 1%-40% of titanium carbide and the balance copper; or 1%-40% of titanium carbide, 0.01%-5% of carbon and the balance copper; or 1%-40% of titanium carbide, 0.01%-8% of rare earth oxide and the balance copper; or 1%-40% of titanium carbide, 0.01%-8% of rare earth oxide, 0.01%-5% of carbon and the balance copper. The preparation method of the copper-based contact material includes the following steps that copper powder and titanium carbide powder are mixed in proportion; cold isostatic pressing is conducted on the evenly mixed powder to obtain a cylindrical pressure ingot; the pressure ingot is sintered in vacuum or under atmosphere protection; hot extrusion is conducted on the sintered pressure ingot to obtain a plate; finally, the plate is rolled to the specified thickness in a cold mode; the plate is cut into the specified dimension. According to the copper-based contact material, under the condition of long-term use, contact resistance between contacts is low, and temperature rising is low and stable.

Description

technical field [0001] The invention relates to a copper-based contact material applied to low-voltage electrical appliances and a preparation method thereof. Background technique [0002] Contacts are the core components of low-voltage electrical appliances, which play the role of connecting, carrying and breaking currents. Their pros and cons directly affect the safety and reliability of low-voltage electrical appliances. The contact material is generally added a certain amount of high melting point reinforcement phase (such as carbon, tungsten, tin oxide, zinc oxide, etc.) Arc ablation, but under long-term use conditions, due to the repeated action of the arc, these reinforcing phases will undergo oxidative denaturation or deposit on the surface of the contacts to form a high-resistance layer, resulting in an increase in the contact resistance between the contacts and a rise in the temperature of the contacts sharply increased. Contents of the invention [0003] The o...

Claims

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Application Information

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IPC IPC(8): H01B1/02H01B13/00
Inventor 杨丛涛柳国春倪树春
Owner 哈尔滨东大高新材料股份有限公司
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