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Copper alloy and preparation method thereof

A technology of copper alloy and preparation steps, which is applied in the field of copper alloy and its preparation, can solve problems such as unsatisfactory comprehensive properties, achieve the effects of refining alloy grains, improving processing plasticity, electrical conductivity and strength

Pending Publication Date: 2022-06-28
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of electronics and electrical industries, the performance requirements of electronic connectors are getting higher and higher. In some application scenarios, connectors are required to meet high strength, good conductivity and excellent high temperature softening resistance, such as some Aviation connectors require copper alloy hardness above 250HV, tensile strength above 870MPa, yield strength above 850MPa and conductivity 45IACS%, and high temperature softening performance requires that the hardness should be above 85% of the original hardness after being kept at 550°C for 30 minutes , and the comprehensive properties of the current C7025 and C7035 series of copper-nickel-silicon alloys can not meet the

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  • Copper alloy and preparation method thereof
  • Copper alloy and preparation method thereof

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Effect test

Embodiment 1

[0029] The concrete preparation steps of this copper alloy are:

[0030] 1) Batching: weighing according to the composition ratio of copper alloy;

[0031] 2) Melting; add Cu, Ni, Si, Zn into the melting furnace to heat up and melt, after all melted, add glass to cover; then raise the temperature to 1350°C, add Fe sheet, after the Fe sheet is completely melted, put the copper liquid The temperature is raised to 1350°C and kept for 20 minutes; then the temperature is lowered to 1300°C, and phosphor copper alloy is added. After holding for 15 minutes, the temperature is controlled at 1250°C for slag removal. After the slag removal, cryolite and sodium carbonate are added to cover. 1. The mass ratio of sodium carbonate is 1:1, add copper-magnesium alloy and rare earth, keep warm until casting starts.

[0032] 3) Semi-continuous casting: control the temperature of the copper liquid at 1230-1260 °C, then turn on the cooling water, control the water pressure at 100Kpa, and then tur...

Embodiment 2

[0044] The concrete preparation steps of this copper alloy are:

[0045] 1) Batching: weighing according to the composition ratio of copper alloy;

[0046]2) Melting; add Cu, Ni, Si, Zn into the melting furnace to heat up and melt, after all melted, add glass to cover; then raise the temperature to 1350°C, add Fe sheet, after the Fe sheet is completely melted, put the copper liquid The temperature is raised to 1380°C and kept for 25 minutes; then the temperature is lowered to 1300°C, and phosphor-copper alloy is added. After holding for 15 minutes, the temperature is controlled at 1250°C for slag removal. After the slag removal, cryolite and sodium carbonate are added to cover. 1. The mass ratio of sodium carbonate is 1:1, add copper-magnesium alloy and rare earth, keep warm until casting starts.

[0047] 3) Semi-continuous casting: control the temperature of the copper liquid at 1230-1260°C, then turn on the cooling water, control the water pressure at 150Kpa, and then turn ...

Embodiment 3

[0059] The concrete preparation steps of this copper alloy are:

[0060] 1) Batching: weighing according to the composition ratio of copper alloy;

[0061] 2) Smelting: add Cu, Ni, Si, Zn into the melting furnace to heat up and melt, after all melted, add glass to cover; then raise the temperature to 1320°C, add Fe flakes, after the Fe flakes are all melted, pour the molten copper The temperature is raised to 1350°C and kept for 20 minutes; then the temperature is lowered to 1280°C, and phosphor copper alloy is added. After holding for 15 minutes, the temperature is controlled at 1250°C for slag removal. After the slag removal, cryolite and sodium carbonate are added to cover, cryolite 1. The mass ratio of sodium carbonate is 1:1, add copper-magnesium alloy and rare earth, keep warm until casting starts.

[0062] 3) Semi-continuous casting: control the temperature of the copper liquid at 1230-1260 °C, then turn on the cooling water, control the water pressure at 120Kpa, and t...

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Abstract

The invention discloses a copper alloy, which is characterized by comprising the following components in percentage by mass: 0.02 to 0.25 weight percent of Fe (ferrum), 0.01 to 0.4 weight percent of P (phosphorus), 2.6 to 3.5 weight percent of Ni (nickel), 0.55 to 0.7 weight percent of Si (silicon), 0.05 to 0.15 weight percent of Mg (magnesium), 0.01 to 0.05 weight percent of Zn (zinc), 0.05 to 0.1 weight percent of rare earth and the balance of Cu (copper) and inevitable impurities. Ni, Si, Fe, P, Mg, Zn and rare earth are added into a copper matrix, the adding amount of all the elements is controlled, the hardness of the copper alloy is larger than or equal to 260 HV, the tensile strength is larger than or equal to 870 MPa, the yield strength is larger than or equal to 850 MPa, the electric conductivity is larger than or equal to 45% IACS, the temperature is 550 DEG C, and the hardness of a strip obtained after heat preservation is conducted for 30 min is 90% or above of the original hardness.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, and in particular relates to a copper alloy and a preparation method thereof. Background technique [0002] With the rapid development of electronics and electrical industries, the performance requirements of electronic connectors are getting higher and higher. In some application scenarios, connectors are required to meet high strength, good conductivity and excellent high temperature softening resistance, such as some Aviation connectors require that the hardness of copper alloy can reach more than 250HV, the tensile strength is more than 870MPa, the yield strength is more than 850MPa, and the conductivity is 45IACS%. , and the comprehensive properties of the copper-nickel-silicon alloys of the C7025 and C7035 series are still not satisfactory. [0003] Therefore, the performance of existing copper alloys needs to be further improved. Contents of the invention [0004] The first techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06B22D11/00C22F1/08C22F1/02C22C1/03H01B1/02C21D8/02
CPCC22C9/06B22D11/004C22F1/08C22F1/002C22F1/02C22C1/03H01B1/026C21D8/0226C21D8/0247
Inventor 曾力维何科科汤敏
Owner JINTIAN COPPER GROUP CORP NINGBO