Tellurium berylco alloy and preparation method thereof

Abstract

The invention discloses a tellurium berylco alloy; the tellurium berylco alloy is prepared from 0.2-2.1 wt.% of Be, 0.1-0.7 wt.% of Te, and others including Co, Ni, Ti, rare-earth elements and impurity elements of which total is not more than 4% wt; the rest is Cu; the preparation method includes steps of a, dosing, feeding, smelting and casting raw materials to acquire an ingot blank according to weight percent; b, orderly performing homogenizing heat treatment, heat processing technique, cold processing technique and annealing, solid dissolving, and aging heat treatment on the ingot blank acquired in step a orderly; and preparing the tellurium berylco alloy. Through adding tellurium in the berylco alloy, tellurium and a copper base can form Cu2Te; the tellurium berylco alloy is good in high-temperature stability, remains the excellent physical performance and corrosive resistance of tellurium beryllium copper, and greatly improves the material cutting performance on the basis of environmental protection, and also performs the plasticity performance.

Description

technical field [0001] The invention relates to an alloy preparation method, in particular to a free-cutting beryllium tellurium copper alloy 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, and has fatigue resistance, corrosion resistance, wear resistance, low temperature resistance, non-magnetic, high electrical and thermal conductivity, impact With a series of excellent comprehensive properties such as no sparks from time to time, it is known as the "king of colored elastic materials" and is widely used in electronics, electrical, communication, instruments, meters, telecommunications, light industry, machinery, chemical industry, coal and o...

AI Technical Summary

Problems solved by technology

[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 easy to cause beryllium-copper alloys to crack during thermal processing. The hot workability of lead-beryllium-copper alloy is poor;

[0010] In recent years, there have been reports on the addition of bismuth to improve the machinability of copper alloys, but the practical application is limited because the addition of bismuth has a great influence on the plasticity of copper alloys, and it is easy to cause alloy cracking during plastic processing, thus It cannot be processed and formed. The addition of bismuth causes fatigue stress cracking and corrosion cracking in the use of materials. Therefore, bismuth has always been an impurity element that seriously harms the performance of copper alloys, and strict content control is carried out in smelting and processing.

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