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High-strength and high-plasticity dual-phase-synergistic-precipitating type copper alloy material and preparation method thereof

A copper alloy and precipitation-type technology, which is applied in the field of high-strength and high-plasticity dual-phase synergistic precipitation-type copper alloy materials and its preparation, can solve the problems of low alloy strength and insufficient processing performance

Inactive Publication Date: 2017-09-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the present invention proposes a high-strength, high-plasticity dual-phase synergistic precipitation type copper alloy material and a preparation method thereof, aiming at problems such as the low strength and insufficient processing performance of existing Cu-Fe alloys. It will not increase the production cost of the alloy, but also has excellent comprehensive properties. It is suitable for many technical fields, especially for many new technologies that have certain requirements for high strength, high conductivity, high plasticity, processing performance and production cost. The field and the production and manufacturing of civil products, as well as the application of manufacturers who have or plan to produce similar copper alloy products

Method used

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  • High-strength and high-plasticity dual-phase-synergistic-precipitating type copper alloy material and preparation method thereof
  • High-strength and high-plasticity dual-phase-synergistic-precipitating type copper alloy material and preparation method thereof
  • High-strength and high-plasticity dual-phase-synergistic-precipitating type copper alloy material and preparation method thereof

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preparation example Construction

[0019]The preparation method of the present invention comprises the following steps: Cu-Fe-C-P alloy composition selection and optimization → Fe-C and Cu-P master alloy smelting and casting → Cu-Fe-C-P alloy preparation and smelting → Cu-Fe-C-P alloy fast Solidification ensures the segregation and precipitation of Fe and P solute elements contained in it as little as possible → ultra-low temperature cold rolling deformation induces martensitic phase transformation of Fe-C phase and the formation of ultrafine sub-grains → low-temperature heat treatment regulates alloy nanocrystalline structure and nano Co-precipitation of Fe-C and Fe-P dual-phase → high-strength and high-plastic Cu-Fe-C-P alloy sheet, such as figure 1 shown.

[0020] The raw materials are 99.9wt% electrolytic high-purity Cu, high-purity Fe, high-purity C, and other intermediate alloys and pure metals. First, melt the Fe-C master alloy in a vacuum intermediate frequency induction furnace, in which the burning l...

Embodiment 1

[0025] According to the compositional design value of the invention alloy 1#, first cut high-purity Cu, Fe-C and Cu-P master alloy, high-purity Fe and other pure metal blocks to prepare corresponding alloys and place them in a vacuum intermediate frequency induction furnace, and carry out Smelting and casting, the specific smelting and casting process is as follows: first, vacuumize the furnace, turn off the vacuum pump when the vacuum of the furnace is reduced to 1.9Pa, and fill in high-purity Ar gas at the same time, stop inflating when the vacuum of the furnace reaches 0.021MPa, and continue to vacuumize When the temperature reaches 1.9Pa, start to raise the temperature step by step, first raise the temperature to 450°C and keep it for 17 minutes, then continue to raise the temperature to 1510°C and keep it warm until the Fe-C and Cu-P intermediate alloys, high-purity Cu, high-purity Fe and other pure metals are completely melted After standing still for 3 minutes, then lowe...

Embodiment 2

[0027] According to the composition design value of the invention alloy 2#, at first high-purity Cu, Fe-C and Cu-P intermediate alloys, high-purity Fe and other pure metal blocks are cut to prepare corresponding alloys and placed in a vacuum intermediate frequency induction furnace, and then processed Smelting and casting, the specific smelting and casting process is as follows: first, vacuumize the furnace, turn off the vacuum pump when the vacuum of the furnace is reduced to 1.9Pa, and fill in high-purity Ar gas at the same time, stop inflating when the vacuum of the furnace reaches 0.021MPa, and continue to vacuumize When the temperature is below 1.9Pa, start to raise the temperature step by step. First, heat it up to 430°C and keep it for 18 minutes, and then continue to raise the temperature to above 1510°C and keep it warm. After Fe-C and Cu-P intermediate alloys, high-purity Cu, high-purity Fe and other pure metals After completely melting, let it stand for 5 minutes, th...

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Abstract

The invention presents a high-strength and high-plasticity dual-phase-synergistic-precipitating type Cu-Fe-C-P series alloy material and a preparation method thereof. Though composition optimizing, processing and heat treatment technology controlling, the alloy of the series can fully utilize ultralow-temperature cold-rolling deformation to induce a Fe-C phase to generate martensite phase transformation and appearing of an ultrafine sub-grain structure, so that the strength of developed copper alloy is enhanced greatly, the tensile strength is close to 650 MPa, and the elongation percentage can still reach to over 4.0%, and therefore the performance of the alloy of the series is obviously superior to the performance of traditional Cu-Fe-P series alloy or Cu-Fe-C series alloy capable of generating strain which induces martensite phase transformation. In addition, after ultralow-temperature deep-cold-rolled state alloy is further subjected to low-temperature aging heat treatment, dual-phase synergistic precipitating of Fe-C and Fe-P and forming of a large amount of nanocrystallines can further be induced, and then the alloy can achieve more excellent comprehensive performance. According to the high-strength and high-plasticity dual-phase-synergistic-precipitating type Cu-Fe-C-P series alloy material and the preparation method thereof, the copper alloy material and the preparation method thereof are very suitable for being applied to manufacturing of high-strength and high-conductivity copper alloy materials for typical parts in numerous high-technology fields such as electronic information, especially manufacturing of complex shaped parts which have high requirements for strength, machining performance and plasticity.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, and relates to an industrially applicable high-strength and high-plasticity dual-phase co-precipitation type copper alloy material and a preparation method thereof, especially for high-power microwave tubes, automobile welding electrodes, integrated circuit lead frames, nuclear technology, Aerospace and many other high-tech fields are developed for the increasingly demanding mechanical properties and processing properties of new copper alloys. Background technique [0002] Advanced high-strength conductive copper alloys have been widely used in industrial fields such as machinery manufacturing, transportation, electrical and electronics. With the rapid development of the electronic information industry, the application fields of advanced copper alloys are constantly expanding, but their performance requirements are also increasing. Getting harsher. Taking structural and functional copper a...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/03C22F1/08
CPCC22C1/03C22C9/00C22F1/08
Inventor 郭明星李高洁易龙
Owner UNIV OF SCI & TECH BEIJING