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High-strength high-elasticity copper alloy and preparation method thereof

A high-elasticity, copper alloy technology, applied in the field of non-ferrous metal processing, can solve the problem that the strength and toughness of copper alloy cannot be balanced, and achieve the effect of small fluctuation range of elongation after fracture, high tensile strength and good plasticity

Active Publication Date: 2017-08-25
宝鸡嘉琦金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a high-strength and high-elastic copper alloy with excellent strength and toughness, good electrical properties and fatigue resistance for the defects that the strength and toughness of existing copper alloys cannot be balanced.

Method used

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  • High-strength high-elasticity copper alloy and preparation method thereof
  • High-strength high-elasticity copper alloy and preparation method thereof
  • High-strength high-elasticity copper alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Select materials according to the alloy composition shown in Table 1

[0024] Table 1 Copper alloy test alloy design composition table (wt%)

[0025]

[0026]

[0027] The copper alloy preparation process is as follows:

[0028] Smelting: Add the above-mentioned raw materials in the smelting furnace and vacuumize until the degree of vacuum is 10 -2 Pa, filled with argon for protection, the melting temperature is 1550°C, after all the materials are completely melted, magnetically stirred evenly and kept warm for 3 minutes, then introduced into the casting mold for casting to obtain alloy ingots.

[0029] Solution annealing: place the cast slab in an annealing furnace for annealing, the annealing temperature is 900°C, the holding time is 3h and then rapidly cooled.

[0030] Face milling and rough rolling: carry out face milling on the alloy ingot (0.8mm milling on the upper and lower surfaces respectively), and then cold rolling the billet, rolling 8 times, the to...

Embodiment 2

[0043] The alloy composition is shown in Table 3

[0044] Smelting: Put the raw materials into the smelting furnace and vacuumize until the vacuum degree is 10 -2 Pa, filled with argon for protection, the melting temperature is 1550°C, after all the materials are completely melted, magnetically stirred evenly and kept warm for 3 minutes, then introduced into the casting mold for casting to obtain alloy ingots.

[0045] Solution annealing: place the cast slab in an annealing furnace for annealing, the annealing temperature is 900°C, the holding time is 3h and then rapidly cooled.

[0046] Face milling and rough rolling: carry out face milling on the alloy ingot (0.8mm milling on the upper and lower surfaces respectively), and then cold rolling the billet, rolling 8 times, the total deformation is 60%.

[0047] Hot rolling: the rough rolled strip is subjected to hot rolling treatment, the hot rolling temperature is 650° C., the hot rolling passes are 6 times, and the total hot ...

Embodiment 3

[0053] The alloy composition is shown in Table 3

[0054] Smelting: Put the raw materials into the smelting furnace and vacuumize until the vacuum degree is 10 -2 Pa, filled with argon for protection, the melting temperature is 1800°C, after all the materials are completely melted, magnetically stirred evenly and kept warm for 5 minutes, then introduced into the casting mold for casting to obtain alloy ingots.

[0055] Solution annealing: place the cast slab in an annealing furnace for annealing, the annealing temperature is 950°C, the holding time is 4h and then rapidly cooled.

[0056] Face milling and rough rolling: carry out face milling on the alloy ingot (0.8mm milling on the upper and lower surfaces respectively), and carry out cold rolling to open the billet. The rolling passes are 10 times, and the total deformation is 70%.

[0057] Hot rolling: the rough rolled strip is subjected to hot rolling treatment, the hot rolling temperature is 700° C., the rolling passes ar...

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Abstract

The invention discloses a high-strength high-elasticity copper alloy and a preparation method thereof, belongs to the field of nonferrous metal manufacturing, and particularly relates to copper-based elastic alloy. The high-strength high-elasticity copper alloy is composed of, by weight, 4.8-7.6% of Ni, 0.05-0.10% of Co, 2.3-5.7% of V, 1.7-2.2% of Cr, 3.5-5.7% of Mo, 1.5-2.3% of Zn, 1.2-2.3% of Mn, 0.7-2.5% of Ti and the balance Cu. The tensile strength of the copper alloy can reach 1300-1600 MPa, the percentage elongation is 11.5% to 16.0%, meanwhile, the copper alloy has quite high fatigue strength being no lower than 460 MPa; and the copper alloy obtained through the method is small in fluctuation range of the tensile strength and percentage elongation, the requirement that the insertion and extraction time is greater than or equal to 40000 when the insertion and extraction force is 1.5 N is met, and the copper alloy can be used for electronic elastic elements.

Description

technical field [0001] The invention belongs to the field of nonferrous metal processing, and in particular relates to a copper-based elastic alloy, in particular to a high-strength and high-elastic copper alloy and a preparation method thereof. Background technique [0002] High-strength and high-elastic copper alloy is one of the key materials for elastic components and electronic components, and is widely used in electronics, communication vehicles and other fields. [0003] At present, copper-based elastic alloys in the domestic market are mainly made of beryllium bronze and tin phosphor bronze. Beryllium bronze is a high-quality elastic material, but it also has its inherent disadvantages. The oxide or dust of beryllium is toxic, and the properties of the alloy are sensitive to heat treatment. Poor stress relaxation resistance, it is not suitable to work at higher temperature for a long time. Tin phosphor bronze is the most widely used copper-based elastic alloy, but i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C1/02
CPCC22C1/02C22C9/06
Inventor 张新利
Owner 宝鸡嘉琦金属有限公司
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