Tellurium-beryllium-copper alloy for manufacturing rods and wires as well as preparation method of tellurium-beryllium-copper alloy

Abstract

The invention discloses a tellurium-beryllium-copper alloy for manufacturing rods and wires as well as a preparation method of the tellurium-beryllium-copper alloy. The tellurium-beryllium-copper alloy comprises beryllium, tellurium, cobalt, nickel, boron, copper and rare earth elements mainly comprising lanthanum, cerium and praseodymium. The preparation method comprises the specific steps that burdening, feeding and smelting are carried out according to the weight percentage, a horizontal continuous casting coil is continuously extruded through a continuous extruder to obtain a hot working plastic deformation metallographic structure, then solid solution, drawing and aging heat treatment processes are sequentially carried out, and the tellurium-beryllium-copper alloy rods and wires are obtained through machining. The boron element added into the alloy has a strong deoxidizing effect and a grain refining effect, and after rods and wires are subjected to a hot extrusion process throughthe continuous extruder, the wires are dynamically recrystallized, so that the tellurium element is not only distributed on the original grain boundary, but also enters the grains from the grain boundary, and the dispersity is further crushed, so that the dispersion distribution is better, and the turning performance is improved to 70%-80% from the original 62%-76%.

Description

technical field [0001] The invention relates to the field of metal material processing technology, in particular to a beryllium tellurium copper alloy for manufacturing rods and wires and a preparation method thereof. Background technique [0002] Beryllium copper is a copper-based alloy material with beryllium as the basic alloying element, which belongs to the copper-based alloy strengthened by aging precipitation. After solid solution and aging heat treatment, the material has high strength, hardness and elastic limit, small elastic hysteresis, good stability, fatigue resistance, corrosion resistance, wear resistance, low temperature resistance, non-magnetic, high electrical and thermal conductivity, With a series of excellent comprehensive properties such as no sparks when impacted, it is known as the "king of colored elastic materials" and is widely used in electronics, electrical, communication, instruments, meters, telecommunications, light industry, machinery, chemic...

AI Technical Summary

Problems solved by technology

[0006] 3. While meeting the turning requirements, the inherent mechanical properties of the material itself cannot be changed

[0008] 1. Lead-containing copper alloys will cause environmental pollution during production and use. Under the action of impurities in drinking water and organic acids, the lead in the alloy will slowly precipitate, endangering human health. This limits the use of lead-containing beryllium copper alloys. Used in home appliances, children's toys, electronic components, automobiles and other spare parts

For example, the European Union is gradually restricting the use of lead in copper alloys, but at present there is no beryllium-copper alloy of a kind of lead-free excellent turning performance to replace the market demand of lead-containing beryllium-copper alloys (the present invention solves this problem);

[0009] 2. Lead neither dissolves in copper nor forms an intermetallic compound with copper. The melting point of lead is low (327°C). Lead-containing beryllium-copper alloys are prone to cracking during thermal processing. Therefore, lead-containing beryllium-copper alloys are hot Poor processing performance

[0010] In recent years, there have been reports in the literature that bismuth was added to improve the machinability of copper alloys, but the addition of bismuth can greatly reduce the plasticity of copper alloys, and it is easy to cause cracks during plastic processing, so that it cannot be processed; the addition of bismuth can cause Fatigue cracking or stress corrosion cracking of materials during use, so bismuth, as an impurity element that seriously harms the properties of copper alloys, must be strictly controlled in smelting and processing, these reasons limit the practical application of bismuth in copper alloys