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

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...

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 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 sharp rise