Copper-based composite material with high strength, corrosion resistance and abrasion resistance

Abstract

The invention discloses a copper-based composite material with high strength, corrosion resistance and abrasion resistance. The composite material is prepared from the following main ingredients in percentage by weight: 55-69 percent of copper, 30-44 percent of zinc, 0.01-5 percent of titanium 0.01-10 percent of graphene and 0.01-5 percent of other optional ingredients, wherein other optional ingredients are one or two of carbon nano-tubes and graphite. The preparation method of the copper-base composite material adopts a powder spinning roller extrusion method, and comprises the following steps: firstly, uniformly mixing copper-zinc alloy powder, copper-titanium alloy powder, graphene powder, carbon nano-tube powder, graphite powder and other powders; filling the space formed by an arc die holder, a spinning roller surface notch and a plug with the uniformly mixed powder from a discharge hopper at a certain speed; extruding the powder into a die, and extruding the powder from a die hole after the powder is compressed in the die cavity so as to mold various pipe materials, plate materials, rod materials, cable materials or sectional materials according to different shapes of the die holes. The copper-based alloy has the advantages of high strength, corrosion resistance, abrasion resistance, conductivity without reduction and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of copper-based composite materials, and in particular relates to a novel high-strength, corrosion-resistant and wear-resistant brass-graphene composite material and a preparation method thereof. Background technique [0002] Brass is mainly composed of copper and zinc elements. It has excellent cold and hot workability, corrosion resistance, and high strength. It can be processed into parts of various shapes and is widely used in pipe joints, switch connectors, Electronic and electrical connecting wires, automotive radiator belts, evaporator and condenser tubes, hardware, toys, auto parts, refrigeration equipment, home appliances, etc. In order to further improve the properties of brass, such as strength, corrosion resistance, wear resistance, high temperature resistance, machinability, etc., aluminum, nickel, iron, zirconium, titanium, lead, tin, lead, Other elements, such as arsenic, form ...

AI Technical Summary

Problems solved by technology

[0003] However, while adding alloying elements to improve the performance of brass in one aspect, it will also reduce other properties.

For example, in order to improve the wear resistance of brass switch connectors, iron and tin are added to improve its wear resistance and mechanical properties, but at the same time greatly reduce the conductivity of brass and reduce the current carrying performance of the switch and security

Adding arsenic and aluminum can improve the corrosion resistance of brass, but it reduces the casting performance and is prone to defects such as shrinkage cavity and porosity

In addition, the oxide of arsenic, arsenic trioxide, commonly known as arsenic, is highly toxic, and its use is strictly restricted by countries all over the world

Adding lead element can improve the cutting performance of brass, but it will reduce its mechanical properties and electrical conductivity, and lead is poisonous, which will cause great harm to human hematopoiesis and nervous system. The United States NSF, Japan JIS, Germany DIN50930 and the EU Relevant standards and decrees strictly limit or prohibit the addition of lead to brass

Images