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Ultrahigh-conductivity leadless free-cutting copper alloy material, and preparation method and application thereof

A copper alloy and easy-cutting technology, which is applied in the field of extremely high-conductivity lead-free free-cutting copper alloy materials and its preparation, can solve the problems of high production cost, high price, and electrical contact failure, and achieve good cold and hot processing performance and excellent Cutting performance and long service life

Inactive Publication Date: 2016-10-26
CECEP INDAL ENERGY CONSERVATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the conductivity of C14500 is only 85-90% ICAS, when it is used for high-voltage, high-current electronic and electrical connectors, under long-term high-load working conditions, it is easy to cause the temperature of the connectors to rise, the resistance to increase, and finally lead to electrical contact failure. , affecting its service life
[0004] There are also domestic researchers who have studied high-strength and high-conductivity copper alloy materials. The strengthening methods are mainly alloying and composite material methods: the alloying method improves the mechanical properties by sacrificing the electrical conductivity to a certain extent, and cannot really achieve both. As a result of both parties, the conductivity of the copper alloy prepared by the alloying method generally does not exceed 80% IACS, and expensive Cr, Zr, Ni and rare earth metals need to be added, the process is complicated, and industrial application and production are difficult; The process is very cumbersome, the production cost is high, and it is still in the experimental research stage

Method used

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  • Ultrahigh-conductivity leadless free-cutting copper alloy material, and preparation method and application thereof
  • Ultrahigh-conductivity leadless free-cutting copper alloy material, and preparation method and application thereof
  • Ultrahigh-conductivity leadless free-cutting copper alloy material, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Melting

[0036] Add 99.8 parts of cathode copper into the semi-continuous casting furnace, heat up and melt under the protection of covering agent charcoal; after the cathode copper is completely melted, add 0.006 parts of phosphor-bronze master alloy (2 / 3) to deoxidize, and control the furnace temperature to 1180℃~ 1220°C, heat preservation and stand for 15min to 20min; then add 0.31 parts of high-purity tellurium (99.99% tellurium), control the furnace temperature to 1180°C to 1220°C, heat preservation and stand for 15min to 20min; then add 0.003 parts of phosphor copper master alloy ( 1 / 3 times) + 0.005 parts of lithium, after complete melting, stir the molten pool, adjust the furnace temperature to 1200°C ~ 1240°C, and implement traction after baking the furnace head several times;

[0037] (2) extrusion

[0038] After passing the component and surface quality inspection of the billet, put it into the induction furnace, heat it to 820°C, and hold it for 30-45 ...

Embodiment 2

[0044] (1) Melting

[0045] Add 99.7 parts of cathode copper into the semi-continuous casting furnace, and heat up and melt under the protection of graphite flakes as a covering agent; after the cathode copper is completely melted, add 0.004 parts of phosphor-bronze master alloy (2 / 3) to deoxidize, and control the furnace temperature to 1180°C ~1220°C, keep warm for 15min~20min; then add 0.25 parts of high-purity tellurium (99.99% tellurium), control the furnace temperature to 1180°C~1220°C, keep warm for 15min~20min; then add 0.002 parts of phosphor-bronze master alloy (1 / 3 times) + 0.004 parts of lithium, after complete melting, stir the molten pool, adjust the furnace temperature to 1200°C ~ 1240°C, and perform traction after baking the furnace head several times;

[0046] (2) extrusion

[0047] After passing the component and surface quality inspection of the billet, put it into the induction furnace, heat it to 800°C, and hold it for 30-45 minutes to make the grains unifor...

Embodiment 3

[0053] (1) Add 99.6 parts of cathode copper into the semi-continuous casting furnace, and heat up and melt under the protection of the covering agent graphite powder; after the cathode copper is completely melted, add 0.002 parts of phosphor-bronze master alloy (2 / 3) times deoxidation, and control the furnace temperature to 1180°C-1220°C, keep it warm for 15min-20min; then add 0.20 parts of high-purity tellurium (99.99% tellurium), control the furnace temperature to 1180°C-1220°C, keep it warm for 15min-20min; then add 0.001 part of phosphorus Copper intermediate alloy (1 / 3 times) + 0.003 parts of lithium, after complete melting, stir the molten pool, adjust the furnace temperature to 1200 ℃ ~ 1240 ℃, and implement traction after baking the furnace head several times;

[0054] (2) extrusion

[0055] After passing the component and surface quality inspection of the billet, put it into the induction furnace, heat it to 760°C, and hold it for 30-45 minutes to make the grains unif...

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Abstract

The invention discloses an ultrahigh-conductivity leadless free-cutting copper alloy material, and a preparation method and application thereof. The material is characterized by comprising the following chemical components by weight: 0.10 to 0.30% of Te, 0.003 to 0.009% of P and 99.70 to 99.90% of Cu, wherein the total amount of impurities is less than 0.1%. The preparation method adopts melting, extruding and drawing technology and cooperatively uses a phosphorus-lithium composite deep deoxidation method; and the prepared has oxygen content of less than 20 ppm, reaching the level of oxygen-free copper TU1, and has electrical conductivity of greater than 95% IACS, obviously higher than C14500 conductivity standard (greater than 85% IACS). The material has excellent machinability, electrical conductivity and heat conductivity and resistance to corrosion and electrical ablation, and can be extensively applied to electronic and electrical connection devices, integrated circuit lead frames, welding high-grade gun nozzles, electromotors, switch components and the like with ultrahigh requirements on electrical conductivity.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a very high-conductivity lead-free free-cutting copper alloy material and a preparation method and application thereof. Background technique [0002] Copper for electric conduction has good electric conductivity, but its strength and heat resistance are low. With the development of electric power industry and electrical equipment, there is an urgent need for various high-conductivity copper alloy materials with medium-high strength, medium-high hardness and good comprehensive properties. [0003] Tellurium copper C14500, one is a high-conductivity free-cutting copper alloy material, which combines excellent free-cutting performance, electrical conductivity, thermal conductivity, corrosion resistance, electrical ablation resistance, and good cold and hot processing performance. However, since the conductivity of C14500 is only 85-90% ICAS, when it is used for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/03
CPCC22C1/03C22C9/00
Inventor 侯龙超侯仁义冯春发吕忠华
Owner CECEP INDAL ENERGY CONSERVATION
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