Copper alloy strip with high intensity, high conductivity and high bending performance and preparation method thereof
A copper alloy strip, high-strength technology, applied in the direction of metal rolling, can solve the problems of poor strength of electronic copper strip, low softening temperature, coarse grain structure, etc., to achieve refined structure of finished products, shorten production process, crystal The effect of particle size reduction
Inactive Publication Date: 2018-12-14
FUJIAN ZIJIN COPPER
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Problems solved by technology
[0004] One of the technical problems to be solved by the present invention is to provide a copper alloy strip with high strength, high conductivity, and high bending performance, which can solve the problems of poor strength, general conductivity, and coarse grain structure in existing electronic copper strips. Bending cracking, low softening temperature and other problems caused by
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[0074] The thickness of the finished product is 0.08mm, requiring tensile strength ≥ 900MPa, electrical conductivity ≥ 40%, elongation ≥ 1%, grain size ≤ 0.005mm, high-strength, non-brittle when bent at 90 degrees when R / T = 1, Production process of copper alloy strip with high conductivity and high bending performance:
[0075] In step a, during semi-continuous casting, the alloy composition is strictly controlled at Ni: 1.5%, Si: 0.5%, Sn: 0.4%, Zn: 0.6%, Fe≤0.02%, Mg≤0.01%, and the balance is Cu and unavoidable impurities, the casting temperature is 1250°C, and the pull-stop-reverse process is adopted, and the size of the slab obtained by casting is 200mm in thickness and 650mm in width;
[0076] In step b, the billet is annealed at high temperature, the annealing temperature is 900°C, and the holding time is 5h;
[0077] Step c, after the billet is annealed, hot rolling is carried out, and the billet is rolled from a thickness of 200mm to 16mm;
[0078] Step d, the bille...
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Abstract
The invention provides a copper alloy strip with high intensity, high conductivity and high bending performance and a preparation method thereof. The copper alloy strip is prepared from the followingraw material components in percentage by weight: 1.5 to 2 percent of Ni, 0.4 to 0.6 percent of Si, 0.3 to 0.6 percent of Sn, 0.4 to 0.7 percent of Zn, less than or equal to 0.02 percent of Fe, less than or equal to 0.01 percent of Mg and the balance of Cu and unavoidable impurities. The preparation method comprises the following steps: adding the raw materials during semi-continuous casting for casting to form a cast blank, performing high-temperature annealing, hot-rolling cogging, all-side milling, rough rolling, intermediate rolling, softening annealing in an elevator furnace, cleaning, secondary intermediate rolling, solution treatment in an air-cushion furnace, aging in the elevator furnace, rolling of a twenty-roller finished product, cleaning, low-temperature annealing in the elevator furnace, secondary cleaning, bending and straightening and shearing of the finished product, and packaging the product in a warehouse. The copper alloy strip can solve the problem that an existingelectronic copper strip cracks during bending and is low in anti-softening temperature due to low strength, poor conductivity and thick grain structures.
Description
【Technical field】 [0001] The invention relates to the field of metal materials, in particular to a copper alloy strip with high strength, high conductivity and high bending performance and a preparation method thereof. 【Background technique】 [0002] Compared with pure copper strips, electronic alloy copper strips have higher elasticity, corrosion resistance and fatigue resistance, and are widely used in connectors in mobile phones, computers, TVs, and automobiles, such as USB interfaces, memory card slots, RF Connectors, battery sockets, etc., but with the rapid development of the electronic information industry, the requirements for connectors continue to develop in the direction of miniaturization, complexity, and high current, requiring electronic copper strips to have extremely thin thickness and high tensile strength , High electrical conductivity, high anti-softening temperature, excellent bending performance and anti-fatigue performance. [0003] At present, the com...
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IPC IPC(8): C22C9/06C22F1/08B21B1/26B21B3/00
CPCC22C9/06B21B1/26B21B3/00B21B2003/005C22F1/08
Inventor 刘羽飞王矿金陈春刚李健邱建根王腾云巫金芳王月明周建辉邱丽梅
Owner FUJIAN ZIJIN COPPER
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