A kind of anti-tarnish golden anti-corrosion copper alloy and its plate preparation method

Abstract

The invention relates to a highly-resistant-to-color-changing gold anti-corrosion copper alloy and a panel preparing method thereof. The alloy is formed by the chemical components as follows: 77-79wt (weight) percent of Cu, 2.0-2.3 wt percent of Al, 0.4-0.6 wt percent of Ni, 0.005-0.01 wt percent of B, 0.05-0.15 wt percent of Ce, 0.2-0.5 wt percent of Si, and the balance of Zn and inevitable impurities. The preparing process comprises the steps of 1, smelting, 2, semi-continuous casting, 3 milling, 4, hot rolling, 5 milling, 6, cold rolling, 7, intermediate annealing, 8, pickling, 9, cold finish rolling, 10, finish product annealing and the like. The highly-resistant-to-color-changing gold anti-corrosion copper alloy is reasonable in component, simple in production process, low in production cost, excellent in casting and processing properties, suitable for performing batch production by using a semi-continuous casting process, and compared with the existing copper alloy such as HAl77-2B, HSn70-1A, HSn72-1-1, the alloy produced by the method is more close to gold in color, better in color-changing-resistant and anti-corrosion properties, and is applied in the fields such as decorating, energy engineering and marine engineering.

Description

technical field [0001] The invention relates to a CuZnAlNiSiCeB high-corrosion-resistant gold-colored copper alloy and a preparation method thereof, in particular to a preparation method for a high-discoloration-resistant and high-corrosion-resistant CuZnAlNiSiCeB gold-colored copper alloy suitable for production by a semi-continuous ingot casting process. Mainly used in decoration, energy engineering, marine engineering and other fields. Background technique [0002] In the field of metal materials, corrosion-resistant copper alloys have been widely valued as low-cost corrosion-resistant materials, and the most widely used one is corrosion-resistant brass. On the one hand, its golden color makes it the most promising imitation gold material in the field of circulation and decoration. Souvenirs, etc.; on the other hand, its good corrosion resistance and anti-biological pollution performance make it play an important role in the fields of marine, shipbuilding and thermal pow...

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Problems solved by technology

[0003] CN93106955.6 discloses a copper-based alloy material for imitation gold decoration, which consists of 3-9% Al, 1-4% Sn, 0.1-1.6% In, 0.1-1.2% Ni, 0.01-1.0% Fe, 0.01- Composed of 0.7% Cr, 0.01-0.8% rare earth and copper, the alloy has a color of 18-24K and has good anti-tarnish performance, but the alloy has a high aluminum content, which increases the difficulty of casting and the cost of raw materials

Patent CN88100404 discloses a production method of an imitation gold material containing indium and tin with a color aiming at 18K. The alloy has good anti-tarnish performance in artificial sweat, but it increases the production cost due to the precious metal indium

CN102899526A discloses a kind of 24K gold-yellow copper alloy material for coinage, in the alloy in salt spray, high humidity, H 2 S, SO 2 It shows good anti-tarnish performance in various environments, and its composition is: Cu: 75.0-77.0wt%, Al: 1.8-2.4wt%, Ni: 0.2-0.8wt%, B: 0.003-0.01wt%, Si: 0.10-0.20wt%, Ce: ≤0.1wt%, Fe: ≤0.06wt%, Pb: ≤0.05wt%, the balance is Zn, but the alloy has insufficient corrosion resistance in seawater

The alloy is distributed with metal filament clusters formed by cobalt-coated copper wires and copper-coated iron wires in the copper matrix. The preparation process is complicated and the cost is high.

[0004] None of the above materials meet the requirements of golden color, high resistance to discoloration and high corrosion resistance at the same time. At the same time, their preparation methods are all traditional ingot casting process, and no semi-continuous casting process is designed.

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