Rare earth cerium-added high-strength dispersion-strengthened copper, and preparation method thereof
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A dispersion-strengthened copper and high-strength technology is applied in the field of high-strength dispersion-strengthened copper added with rare earth cerium and its preparation. , The effect of improved corrosion resistance and low cost
Inactive Publication Date: 2017-06-13
付亚波
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[0006] Among the existing materials and preparation technologies, the main problems are: the internal oxidation process is complex, costly, dangerous, and the product performance is not stable. High-quality products cannot be stably produced in China.
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Embodiment 1
[0017] The present invention is described in detail below in conjunction with embodiment.
[0018] In the embodiment of the present invention, the process flow of dispersion strengthened copper with rare earth cerium and its preparation method is as follows: composition design, including copper powder, nano-Al 2 o 3 and cerium, the ratio of each component is: copper 98.20wt.%, nanometer Al 2 o 3 : 0.88wt.%, cerium: 0.88wt.%, impurity elements include iron, chromium oxide, etc., iron ≤ 0.01wt%, zirconia ≤ 0.02wt%, impurity elements less than 0.04wt.%.
[0019] Rare earth cerium and nano-alumina are mixed in equal proportions. The particle size of rare earth cerium is about 1 mm. Put it into a planetary ball mill for grinding with copper powder for 6 hours at a speed of 200 rpm and a ball-to-material ratio of 5:1. Obtain a mixed powder with uniform composition, and sinter it with a plasma device at a pressure of 30 MPa and a high temperature of 870°C to obtain a high-temperat...
Embodiment 2
[0021] The present invention is described in detail below in conjunction with embodiment.
[0022] In the embodiment of the present invention, the process flow of dispersion strengthened copper with rare earth cerium and its preparation method is as follows: composition design, including copper powder, nano-Al 2 o 3 and cerium, the ratio of each component is: copper 98.46wt.%, nanometer Al 2 o 3 : 0.75wt.%, cerium: 0.75wt.%, impurity elements include iron, chromium oxide, etc., iron ≤ 0.01wt%, zirconia ≤ 0.02wt%, impurity elements less than 0.04wt.%.
[0023] Rare earth cerium and nano-alumina are mixed in equal proportions. The particle size of rare earth cerium is about 1mm. Put it into a planetary ball mill for grinding with copper powder for 5.5 hours at a speed of 195 rpm and a ball-to-material ratio of 5:1. Obtain a mixed powder with uniform composition, sinter it with a plasma equipment at a pressure of 30MPa and a high temperature of 860°C to obtain a high-temperatu...
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Abstract
The present invention provides rare earth cerium-added high-strength dispersion-strengthened copper, and a preparation method thereof. The method comprises the following specific steps: mixing rare earth cerium and nano Al2O3 according to a ratio, and grinding the mixture with copper powder in a planetary ball mill to obtain mixed powder with uniform components; performing high-temperature sintering on the mixed powder to obtain a high-temperature sintering blank, performing hot processing and quenching on the high-temperature sintering blank to obtain a tubular bar blank, and performing cold deformation or thermal deformation on the tubular bar blank to obtain the dispersion-strengthened copper of a finished product tubular bar. In the present invention, a new element, the rare earth cerium, is added to form a new phase. The dispersion-strengthened copper comprises following components in percentage by mass (wt.%): 98.20-99.0% of copper, 0.5-0.9% of nano Al2O3, 0.5-0.9% of cerium, and the balance of impurity elements. In the present invention, a new element, rare earth cerium, is added, so that the strength and the hydrochloric acid corrosivity resistance can be obviously improved. Compared with a material prepared by using a conventional method, for the copper disclosed by the present invention, the extension strength is improved by 24.03%, and the electric conductivity is reduced only by 7.38%. Compared with powder at other mixed ratios, the copper disclosed by the present invention has the most strength.
Description
technical field [0001] The invention relates to a new formula for preparing dispersion-strengthened copper and a manufacturing method thereof. The strength of strengthened copper can be greatly improved by adding rare earth cerium, which belongs to the field of new material development. Background technique [0002] Dispersion strengthened copper is also called aluminum oxide copper (Cu-Al 2 o 3 ) alloy, because of its excellent high strength and high conductivity, it is widely used in electrical engineering switch contact bridge, continuous casting machine mold lining, integrated circuit lead frame, high-power asynchronous traction motor rotor, electrified railway contact wire (tram line ), thermonuclear experimental reactor (ITER) divertor vertical target heat sink, high pulse magnetic field conductor materials, etc., and has irreplaceable advantages of other materials in these fields, and has better high strength, high conductivity and high temperature stability than ch...
Claims
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