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Beryllium-free polybasic copper alloy

A copper alloy, multi-component technology, applied in the field of metal functional materials, can solve the problems of low hardness, limited application fields, low strength and hardness, and achieve the effect of superior wear resistance

Active Publication Date: 2013-12-04
NANJING DAMAI SCI&TECH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively low hardness of this alloy system, the highest Brinell hardness does not exceed 150, and its low strength and hardness limit its application field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A beryllium-free multi-component high-conductivity high-strength copper alloy:

[0017] 1. Raw material preparation: electrolytic copper, pure Co, pure Zr, pure Si, pure Ti, rare earth (RE: Ce-La mixed rare earth); in terms of mass fraction, the alloy composition is: Co, 2.2%; Si, 0.4%; Ti, 0.4%; Zr, 0.15%, rare earth, 0.1%; the balance is Cu and unavoidable impurities, of which the impurity content is ≤0.2%.

[0018] 2. Prepare Cu-Si, Cu-Zr, Cu-RE and Cu-Ti master alloys in a vacuum furnace: Si: 8%wt, Zr: 4%wt, RE: 5%wt, Ti in the master alloy: 10%wt;

[0019] 3. Non-vacuum melting and casting to form an ingot: place the electrolytic copper plate on the bottom of the crucible, add an appropriate amount of glass and borax (for the purpose of covering the surface of the liquid metal, the actual amount of glass added depends on the actual production situation, and the mass ratio of glass to borax is 5: 1) Raise the temperature until the electrolytic copper is melted, an...

Embodiment 2

[0025] A beryllium-free multi-component high-conductivity high-strength copper alloy:

[0026] 1. Raw material preparation: electrolytic copper, pure Co, pure Zr, pure Ti, rare earth (RE: Ce-La mixed rare earth); in terms of mass fraction, the alloy composition is: Co, 1.8%; Ti, 0.5%; Zr, 0.1 %, mixed rare earth, 0.1%; the balance is Cu and unavoidable impurities, of which the impurity content is ≤0.2%.

[0027] 2. Vacuum melting and casting to form an ingot: put the cobalt sheet at the bottom of the crucible first, add an electrolytic copper plate, evacuate to within 10Pa, and heat up. After the electrolytic copper is melted, pure Ti, pure Zr and mixed rare earth RE are added from the hopper according to the proportion of the alloy composition. Among them, Ti, Zr and RE are calculated as about 5% burning loss, and Ti is calculated as about 10% burning loss. After a few minutes, vacuum casting is carried out to form an ingot; the casting temperature is about 1250°C.

[0028]...

Embodiment 3

[0033] A beryllium-free multi-component high-conductivity high-strength copper alloy

[0034] 1. Raw material preparation: electrolytic copper, pure Co, pure Zr, pure Si, pure Ti, rare earth (RE: Ce-La mixed rare earth); in terms of mass fraction, the alloy composition is: Co, 2.2%; Si, 0.6%; Ti, 0.2%; Zr, 0.1%, mixed rare earth, 0.2%; the balance is Cu and unavoidable impurities, of which the impurity content is ≤0.2%.

[0035] 2. Prepare Cu-Si, Cu-Zr, Cu-RE, Cu-Ti master alloys in a vacuum furnace: Si: 8%wt, Zr: 4%wt, RE: 5%wt, Ti in the master alloy: 10%wt;

[0036] 3. Non-vacuum melting and casting to form castings: place the electrolytic copper plate at the bottom of the crucible, add appropriate amount of glass and borax (for the purpose of covering the liquid metal surface, the actual glass addition depends on the actual production situation, the mass ratio of glass to borax is 5:1 ), heat up to the melting of electrolytic copper, and add the master alloy from the ho...

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Abstract

The invention relates to beryllium-free polybasic copper alloy. The beryllium-free polybasic copper alloy comprises the following components in percentage by mass: 1.5-2.5 percent of Co, 0.1-0.6 percent of Ti, 0.05-0.3 percent of Zr, 0.05-0.5 percent of RE and the balance of Cu and inevitable impurities, and the content of the impurities is at most 0.3 percent; or the beryllium-free polybasic copper alloy comprises the following components in percentage by mass: 1.5-2.5 percent of Co, 0.1-0.6 percent of Ti, 0.05-0.3 percent of Zr, 0.05-0.5 percent of RE, 0.1-0.6 percent of Si and the balance of Cu and inevitable impurities, and the content of the impurities is at most 0.3 percent. The hardness of the alloy reaches 190-240 HB, the electric conductivity reaches 30-46 percent of IACS (International Annealed Copper Standard), and the softening temperature is larger than 500 degrees. In the process of electric resistance welding, the alloy has good abrasive resistance, and the service life of the alloy is 4-6 times as that of the CuCrZr alloy. The beryllium-free polybasic copper alloy can be widely applied to resistance welding electrodes, conductive structures and the copper alloy used for dies.

Description

technical field [0001] The invention belongs to the field of metal functional materials, and the alloy can be applied to products such as resistance welding electrodes, conductive structural parts, and mold materials that require high electrical conductivity (heat conduction) and high strength (hardness). Background technique [0002] High-conductivity and high-strength copper alloys are structural and functional materials with excellent comprehensive physical and mechanical properties, and are widely used in industrial fields such as resistance welding, electric power, electronics, and machinery manufacturing. The patents "High Strength and High Conductivity Rare Earth Copper Alloy and Its Manufacturing Method" and "High Strength and High Conductivity Copper Alloy for Welding Machine Electrodes" mainly introduce Cu-Cr series and Cu-Cr-Zr series high conductivity and high strength copper alloys . However, due to the relatively low hardness of the alloy system, the highest B...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06
Inventor 朱治愿吴宇宁戴安伦
Owner NANJING DAMAI SCI&TECH IND CO LTD
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