A kind of anti-tarnish imitation golden copper alloy material and preparation method thereof

An alloy material, anti-discoloration technology, used in marine engineering, coinage blanks, energy engineering, various decorative materials fields, can solve the problems of imitation gold, anti-discoloration, corrosion resistance, low product quality final yield, alloy resistance Insufficient corrosion performance and other problems, to achieve the effect of low production cost, excellent discoloration resistance and corrosion resistance, and suitable for industrial production

Active Publication Date: 2018-08-07
苏州中色华人铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN102899526B patent discloses a golden yellow copper alloy material for coinage. The alloy is exposed to high humidity, artificial sweat, salt spray, SO 2 and H 2 S and other hot and humid environments show good anti-tarnish performance, 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
[0004] None of the above materials meet the performance requirements of gold imitation, discoloration resistance, and corrosion resistance. At the same time, the above materials are not milled on four sides after hot rolling, and their product quality and final yield are low in industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] According to the mass percentage of raw materials: Cu: 80wt%, Al: 1.5wt%, Ni: 0.5 wt%, Sn: 0.7 wt%, Fe: 0.2wt%, Ce: 0.05wt%, the remaining components are Cu and unavoidable impurities. Melting is carried out in an intermediate frequency induction melting furnace, and vertical semi-continuous casting is performed to obtain copper alloy ingots with uniform composition. After double-sided milling, the ingot is heated to 900 ℃ in a heating furnace, and then hot rolled on a hot rolling mill after holding for 30 min to 1 h, and the processing processes such as milling, cold rolling, intermediate annealing and pickling are carried out to obtain cold rolled slabs , after finishing rolling, a sheet of 1.9mm±0.02mm is obtained, and then finished annealing is performed to obtain a discoloration-resistant imitation gold copper alloy material with excellent microstructure and properties.

Embodiment 2

[0032] According to the mass percentage of raw materials: Cu: 82wt%, Al: 1.8 wt%, Ni: 1.0 wt%, Sn: 0.3 wt%, Fe: 0.5wt%, Ce: 0.01wt%, the rest components are Cu and unavoidable impurities. Melting is carried out in an intermediate frequency induction melting furnace, and vertical semi-continuous casting is performed to obtain copper alloy ingots with uniform composition. After double-sided milling, the ingot is heated to 900 ℃ in a heating furnace, and then hot rolled on a hot rolling mill after holding for 30 min to 1 h, and the processing processes such as milling, cold rolling, intermediate annealing and pickling are carried out to obtain cold rolled slabs. , after finishing rolling, a sheet of 1.9mm ± 0.02mm is obtained, and then finished annealing is performed to obtain a discoloration-resistant imitation gold copper alloy material with excellent microstructure and properties.

Embodiment 3

[0034] According to the mass percentage of raw materials: Cu: 83wt%, Al: 2.4wt%, Ni: 0.5 wt%, Sn: 0.5 wt%, Fe: 0.2wt%, Ce: 0.01wt%, the remaining components are Cu and unavoidable impurities. Melting is carried out in an intermediate frequency induction melting furnace, and vertical semi-continuous casting is performed to obtain copper alloy ingots with uniform composition. After double-sided milling, the ingot is heated to 900 ℃ in a heating furnace, and then hot rolled on a hot rolling mill after holding for 30 min to 1 h, and the processing processes such as milling, cold rolling, intermediate annealing and pickling are carried out to obtain cold rolled slabs. , after finishing rolling, a sheet of 1.9mm ± 0.02mm is obtained, and then finished annealing is performed to obtain a discoloration-resistant imitation gold copper alloy material with excellent microstructure and properties.

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Abstract

The invention relates to an anti-discoloration gold imitation copper alloy material, the composition of which is Cu: 79-83 wt%, Al: 1.5-2.5 wt%, Ni: 0.5-1.0 wt%, Sn: 0.3-1.0 wt%, Fe: 0.2 ~0.5 wt%, Ce: 0.01~0.05 wt%, the remaining components are Zn and unavoidable impurities; its color is golden yellow, the color requires brightness value L≥80, red and green value a: 1~4, blue and yellow value b: 19-26. Compared with copper alloys such as the existing alloy HSn72-1-1, the alloy produced by the present invention has better discoloration resistance and corrosion resistance. The alloy composition of the invention is reasonable, the production process is simple, and the alloy performance is superior, and can be applied to various fields of building decoration materials, commemorative coins, energy engineering, marine engineering and the like.

Description

technical field [0001] The invention relates to a copper alloy, in particular to a multi-component copper alloy material with imitation golden appearance, corrosion resistance and discoloration resistance, which is mainly used in the fields of coinage blanks, various decorative materials, energy engineering, marine engineering and the like. Background technique [0002] In recent years, with the increasing demand for corrosion resistance of copper alloys, copper alloys are also required to have a beautiful and pleasing appearance and resist discoloration. The anti-discoloration imitation gold copper alloy has excellent golden color, anti-discoloration and corrosion resistance, and is a very valuable copper alloy material. The alloy product can be related to currency in circulation, commemorative coins, architectural decoration, tourist souvenirs, arts and crafts products, etc. At the same time, the alloy product has good corrosion resistance and anti-marine biological pollut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/03C22F1/08
CPCC22C1/03C22C9/04C22F1/08
Inventor 李华清陈忠平
Owner 苏州中色华人铜业有限公司
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