A kind of preparation method of precipitation hardening copper alloy

A precipitation hardening, copper alloy technology, applied in the field of alloys, can solve problems such as production efficiency defects, achieve the effects of improving production efficiency, excellent mechanical properties and electrical conductivity, and shortening heat treatment time

Active Publication Date: 2016-01-06
广州铜材厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a preparation process not only has defects in production efficiency, but also is uneconomical in cost.

Method used

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  • A kind of preparation method of precipitation hardening copper alloy
  • A kind of preparation method of precipitation hardening copper alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6， and comparative example 1

[0020] Examples 1-6, and comparative examples 1*-8*:

[0021] One, batching: mix and get raw material with the weight percentage shown in Table 1, and described raw material is the powder that purity is 99.99% oxygen-free copper and purity is each alloying element of 99.9%;

[0022] 2. Melting: Melting the prepared raw materials in a high-frequency furnace under a nitrogen protective atmosphere. The smelting is to first mix Cu, Zn, and Sn into the furnace, raise the temperature to 1240°C and continue stirring to melt The body is fully mixed, then Ni, Fe and P are added, continue to heat up to 1300°C and keep warm for smelting, after smelting, cast to obtain a Ф30mm, 200mm long copper alloy ingot;

[0023] 3. Hot rolling processing: After heating the copper alloy ingot to 960°C, perform 6 passes of hot rolling processing to 8mm, and the final rolling temperature is controlled at 740°C;

[0024] 4. Cold-rolled processing: After the hot-rolled copper alloy is milled to remove sc...

Embodiment 7-10

[0029] Examples 7-10, and Comparative Examples 9*-20*, the composition of the alloy is the same as Example 2, the first annealing temperature and time (A), the last two annealing temperatures and time (B), the final annealing Refer to Table 2 for the preparation process parameters such as temperature and time (C), cold rolling reduction rate and so on.

[0030] Table 2

[0031]

[0032] It can be seen from the results in Table 2 that the temperature of the first annealing, intermediate annealing and final annealing should not be too high, otherwise the strength of the copper alloy will not meet the requirements, but it should not be too low, too low to achieve the effect of annealing, As a result, the processability and electrical conductivity cannot meet the requirements. At the same time, considering the influence of intermediate cold rolling, the temperature of the first annealing should be set higher than the temperature of the intermediate annealing, and the temperatur...

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PUM

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Abstract

The invention provides a preparation method of a precipitation hardening type copper alloy, wherein a nickel-iron-phosphorus-copper precipitation hardening type alloy system is selected; the proportion of each alloy element is optimized and alloy elements Zn and Sn are properly added; the annealing temperature, the annealing time and the parameters of the cold rolling process are controlled; as a result, the heat treatment time is shortened and the production efficiency is improved; in the meantime, the precipitation hardening type copper alloy having both excellent mechanical properties and electric conductivity is obtained.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a method for preparing a precipitation-hardening copper alloy with excellent mechanical properties and electrical conductivity. Background technique [0002] Copper alloy materials have excellent mechanical strength and good electrical conductivity, coupled with relatively low production costs, so they are widely used in electrode contacts, electrode arms, motor commutators, electronic and telecommunications connectors, terminals, relays and lead frames and other manufacturing fields. [0003] However, with the development trend of industrial products such as integrated circuits towards high density, miniaturization, and multi-function, higher and higher requirements are put forward for the strength and electrical conductivity of copper alloy as the basic material. For the higher requirements of copper alloys with excellent mechanical strength and electrical conductivity, precipi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/02C22F1/08
Inventor 毛秧群
Owner 广州铜材厂有限公司
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