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Cu-Cr-Ag alloy wire rod and preparation and processing method thereof

A cu-cr-ag and alloy wire technology, which is applied in the field of Cu-Cr-Ag alloy wire and its preparation and processing, can solve the problem that copper-chromium-zirconium alloy cannot realize long-length single-line continuous production, it is difficult to control the feeding amount, and the product composition Uneven problems, to achieve the effect of excellent surface quality, short annealing time, stable chemical composition

Active Publication Date: 2019-07-02
GRIMAT ENG INST CO LTD
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AI Technical Summary

Problems solved by technology

However, as shown by most studies, the alloying elements of copper-chromium-zirconium alloys have high chemical activity and are easily lost during smelting, especially when zirconium is added, the loss rate of zirconium is very fast in a non-vacuum state, and the amount of feeding is difficult to control. Alloys can usually only be prepared under vacuum conditions, which limits the length of the product line and causes uneven product composition between batches
[0004] The study found that replacing zirconium with silver to prepare copper-chromium-silver alloy can also maintain the comprehensive performance of the material at a high level, and copper-chromium-silver alloy can be continuously cast under non-vacuum conditions, which solves the problem that copper-chromium-zirconium alloy cannot achieve large The problem of continuous production of length single line

Method used

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preparation example Construction

[0027] The preparation and processing method of Cu-Cr-Ag alloy wire rod comprises the following steps:

[0028] Step 1. Using upward continuous casting process, use 1:1:1 graphite flakes + borax + cryolite as covering agent, mix ingredients according to mass percentage, first melt most of the electrolytic copper and keep it warm at 1160±10°C, the thickness Add all the silver bars ≤3mm and width≤20mm, keep warm for 10-15min; heat up to 1350±10℃, wrap the pure chromium particles with an average particle size ≤5mm with copper foil, and then wrap the remaining electrolytic copper plate tightly with chromium Clamp it vertically downward and slowly dissolve into the melt, keep warm for 4-6 hours, then start to draw up at a speed of 0.6-0.8m / min, and finally make a continuous casting wire billet with a diameter of 20±1mm.

[0029] In step 1, when the mass percentage of Cr is 0.31-0.38%, three-high graphite is used as the crystallizer material.

[0030] In step 1, when the mass perce...

Embodiment 1

[0040]Design a kind of Cu-0.31%Cr-0.22%Ag (mass ratio) alloy wire rod, with A grade electrolytic copper plate, the pure chromium particle of average grain size 3mm, the pure silver bar of 300 * 20 * 3mm as raw material batching in proportion, total Amount of 4 tons, using graphite flakes + borax + cryolite with a weight ratio of 1:1:1 as a covering agent, first melt most of the electrolytic copper and keep it at 1160°C for 1 hour, add silver bars and keep it for 12 minutes, and then heat up to 1350°C. Wrap the chromium particles with copper foil, clamp the chromium bag with two electrolytic copper plates, slowly add it into the furnace vertically, and keep it warm for 5 hours. The three-high graphite material crystallizer was used to start upward continuous casting at 1350°C, and the continuous casting speed was 0.8m / min to prepare a continuous casting wire billet with a diameter of 20mm. Use electrolytic copper plates with a size of less than 300×50×20mm, silver bars less th...

Embodiment 2

[0043] Design a kind of Cu-0.45%Cr-0.30%Ag (mass ratio) alloy wire rod, with A-grade electrolytic copper plate, pure chromium particles with an average particle size of 4mm, and pure silver bars of 300×20×3mm as raw materials in proportion, the total Amount of 4 tons, using graphite flakes + borax + cryolite with a weight ratio of 1:1:1 as a covering agent, first melt most of the electrolytic copper and keep it at 1160°C for 1 hour, add silver bars and keep it for 15 minutes, and then heat up to 1350°C. Wrap the chromium particles with copper foil, clamp the chromium bag with two electrolytic copper plates, slowly add it into the furnace vertically, and keep it warm for 6 hours. A boron nitride ceramic crystallizer was used to start upward continuous casting at 1350°C, and the continuous casting speed was 0.6m / min to prepare a continuous casting wire billet with a diameter of 20mm. Use electrolytic copper plates with a size of less than 300×50×20mm, silver bars less than 300×...

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Abstract

The invention relates to a Cu-Cr-Ag alloy wire rod and a preparation and processing method thereof, and belongs to the field of non-ferrous metal material preparation and processing. The alloy wire comprises the following components of, by mass, 0.31-0.45% of Cr, 0.22-0.44% of Ag and the balance Cu, wherein the content of Cr+Ag is 0.53-0.75%. The alloy is subjected to up-drawing continuous casting, large deformation cold processing, double-stage solid solution heat treatment, large deformation cold processing, double-stage aging heat treatment, large cold deformation cold processing and on-line continuous annealing processes to be prepared the ultrafine alloy wire rod. The obtained wire rod has excellent comprehensive performance, the problem of non-vacuum continuous casting of a copper-chromium-zirconium alloy is solved, the wire rod can be used for replacing the copper-chromium-zirconium alloy and serves as a high-performance electric wire and cable conductor in the environment withthe long-term working temperature lower than 200 DEG C, and a good application prospect is achieved.

Description

technical field [0001] The invention relates to a Cu-Cr-Ag alloy wire rod and a preparation and processing method thereof, belonging to the field of preparation and processing of nonferrous metal materials. Background technique [0002] High-performance wires and cables used in high-tech fields such as aerospace, electrical and electronics, energy and transportation are important power and signal transmission components. With the continuous improvement of the equipment level in the above-mentioned fields, relevant design and production units have higher and higher requirements for the comprehensive performance of high-end components including high-performance wires and cables. For wires and cables, the conductor at the core not only determines the stability and reliability of signal and power transmission, but also determines the application range and environment of the cable. Improving the performance of the conductor is the key to improving the level of the cable. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/02B21C37/04C22F1/08C22F1/02
CPCB21C37/04C22C1/02C22C9/00C22F1/02C22F1/08
Inventor 解浩峰米绪军黄国杰彭丽军徐高磊杨振冯雪尹向前高宝东
Owner GRIMAT ENG INST CO LTD
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