High-color-changing-resistance golden copper alloy and preparation method

A technology for discoloring gold and copper alloys, which is applied in manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of poor discoloration resistance and high preparation cost, and achieve the effect of low production cost, reasonable alloy composition and high gold degree.

Active Publication Date: 2019-06-14
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of poor anti-tarnish ability of the existing golden copper alloy, and the high cost of preparation of the material due to the high price of alloy elements such as indium and silver, and provide an alloy with reasonable components, low raw material price, Simple production process, low production cost, good processing performance, high goldenness, environment-friendly high goldenness copper alloy and preparation method, to meet the needs of various decorative materials and handicrafts for high resistance to discoloration, golden copper alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The composition is Zn: 10wt.%, Al: 6wt.%, Ce: 0.1wt.%, Co: 0.1wt%, B: 0.008wt%, and the balance of the gold copper alloy composition ratio of copper, respectively, take pure zinc , Pure aluminum, pure cobalt, copper-cerium, copper-boron master alloy and electrolytic copper; first, the electrolytic copper is dried, aluminum is added, and heated to melt. The melting process uses cryolite, calcium fluoride and coke borax as the covering agent. The volume percentage is 1:1:1. Then, zinc is added, and after melting, pure cobalt, copper-cerium, copper-boron master alloy is added to the molten liquid to obtain an alloy melt. The furnace temperature is controlled at 1220℃, and the converter is semi-continuous casting at 1200℃. The casting speed is 5.5m / h. Heat the copper alloy ingot at 820℃ for 6 hours, perform 5 passes of hot rolling, the final rolling temperature is 720℃, control the total hot rolling deformation to 80%, and water quench to obtain the hot rolled billet; The ...

Embodiment 2

[0059] The composition of the golden copper alloy composition ratio of Zn: 12wt.%, Al: 5wt.%, Ce: 0.1wt.%, Co: 0.2wt%, B: 0.01wt%, and the balance being copper, respectively take pure zinc , Pure aluminum, pure cobalt, copper-cerium, copper-boron master alloy and electrolytic copper; first, the electrolytic copper is dried, aluminum is added, and heated to melt. The melting process uses cryolite, calcium fluoride and coke borax as the covering agent. The volume percentage is 1:1:1. Then, zinc is added, and after melting, pure cobalt, copper-cerium, copper-boron master alloy is added to the molten liquid to obtain an alloy melt. The furnace temperature is controlled at 1220℃, and the converter is semi-continuous casting at 1200℃. The casting speed is 6.0m / h. Heat the copper alloy ingot at 820°C for 6 hours, conduct 5 passes of hot rolling, the final rolling temperature is above 720°C, control the total hot rolling deformation to 80%, and water quench to obtain a hot rolled bill...

Embodiment 3

[0061] The composition is Zn: 14wt.%, Al: 3wt.%, Ce: 0.1wt.%, Co: 0.2wt%, B: 0.01wt%, and the balance is the golden copper alloy composition ratio of copper, respectively, take pure zinc , Pure aluminum, pure cobalt, copper-cerium, copper-boron master alloy and electrolytic copper; first, the electrolytic copper is dried, aluminum is added, and heated to melt. The melting process uses cryolite, calcium fluoride and coke borax as the covering agent. The volume percentage is 1:1:1. Then, zinc is added, and after melting, pure cobalt, copper-cerium, copper-boron master alloy is added to the molten liquid to obtain an alloy melt. The furnace temperature is controlled at 1220℃, and the converter is semi-continuous casting at 1200℃. The casting speed is 6.0m / h. Heat the copper alloy ingot at 820°C for 6 hours, conduct 5 passes of hot rolling, the final rolling temperature is above 720°C, control the total hot rolling deformation to 80%, and water quench to obtain a hot rolled billet...

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Abstract

The invention discloses a high-color-changing-resistance golden copper alloy and a preparation method. The alloy comprises Zn, Al, Co, Ce, B and the balance Cu. The preparation process comprises the steps of casting, hot rolling, cold rolling, solution hardening, cold finish and rough rolling, cold finish rolling and finished product annealing. The golden degree of the produced alloy is high, thehot processing performance and the cold processing performance are both excellent, and resistance to deformation is small; and the alloy includes no precious metal elements, and cost is low. The components of the alloy are reasonable and simple, the golden degree of the alloy is improved through reasonable matching of cheap aluminum and zinc, the casting process is simple through the simple alloycomponents, through reasonable matching of cerium and boron, the processing property is improved, and color changing resistance is improved; and the binding energy of trace cobalt and the vacancy in the copper alloy is low, binding with the vacancy in the copper alloy can be achieved effectively, a Zn atom diffusion channel is blocked, and dezinc corrosion corrosion of the alloy is improved. The alloy is simple in production process, low in production cost, good in processing performance and good in golden degree and is suitable for industrial production.

Description

Technical field [0001] The invention relates to a high-resistance discoloration golden brass alloy and a preparation method, which are mainly used in artwork, bookmarks, commemorative coins (chapters) and various decorative materials. It belongs to the field of new material technology. Background technique [0002] Gold has a brilliant golden yellow color and very stable chemical properties. In addition to being widely used as a functional material in electronic information and other fields, gold has always been the preferred material for artworks, handicrafts and other products. However, due to its low reserves and high prices, as a bulk art market, a large number of applications are restricted. Therefore, high-quality and inexpensive imitation gold alloy products are getting more and more attention. [0003] Commonly used imitation gold products at home and abroad are mainly copper-based imitation gold products. Many domestic researches are mainly to add aluminum, zinc, tin, ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C9/04C22F1/02C22F1/08C21D9/00
Inventor 李周邱文婷王檬孙艳于翔宇
Owner CENT SOUTH UNIV
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