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Tellurium berylco alloy and preparation method thereof

A technology of beryllium-copper alloy and master alloy, which is applied in the field of free-cutting tellurium-beryllium-copper alloy and its preparation, can solve the problems of large influence of plasticity of copper alloy, poor thermal processing performance of lead-containing beryllium-copper alloy, cracking of beryllium-copper alloy, etc., to achieve Good stability in plastic thermal processing, high temperature softening temperature point, and the effect of improving electrical corrosion resistance

Inactive Publication Date: 2017-06-13
KINKOU SUZHOU COPPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Tellurium berylco alloy and preparation method thereof
  • Tellurium berylco alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Fabrication of beryllium tellurium copper tubes by extrusion

[0045] (1) Dosing is carried out according to the weight percentage of Table 1, and the feeding order is successively cathode copper CATH-1, copper-beryllium master alloy (containing beryllium 4%), pure tellurium, copper-nickel master alloy (containing nickel 10%), copper-cobalt master alloy (Containing 10% cobalt), using a 750Kg power frequency cored furnace for melting and non-vacuum induction furnace, the melting temperature is 1170 ° C, until the melt melts, keep it warm for 15 minutes, pass in argon gas to remove impurities and gases, after degassing and removing impurities , stand still for 15 minutes, and then cast a Φ155 round ingot with a hydraulic semi-continuous casting machine, casting temperature 1100 ° C, argon protection, casting speed 150-250mm / min, cooling water pressure 0.3MPa, sawing cut length Φ155×330;

[0046] (2) The round ingot is hot-extruded at a temperature of 910°C, the extrusion ...

Embodiment 2

[0057] Embodiment 2: Continuous casting method prepares beryllium tellurium copper bar

[0058] (1) carry out batching according to table 4 weight percent, raw material is cathode copper CATH-1, copper-beryllium master alloy (containing beryllium 10%), copper-tellurium master alloy (containing tellurium 10%), copper-nickel master alloy (containing nickel 10%) ), copper-cobalt master alloy (containing 10% of cobalt), using vacuum induction furnace for smelting, firstly adding cathode copper CATH-1, copper-tellurium master alloy (containing 10% of tellurium), copper-nickel master alloy (containing 10% of nickel), Copper-cobalt master alloy (containing 10% cobalt), after melting, use a vacuum feeding device to add copper-tellurium master alloy (containing 10% tellurium), copper-beryllium master alloy (containing 10% beryllium), after melting, heat up to 1270 ° C, and remove slag at high temperature , then lower the temperature to 1120°C with low power, and keep it warm for 20 min...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C9/06C22C1/03C22F1/08C22B9/00
CPCC22B9/003C22C1/03C22C9/00C22C9/06C22F1/08
Inventor 韩坦朱戴博陈红
Owner KINKOU SUZHOU COPPER IND CO LTD
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