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A kind of gold copper alloy with high discoloration resistance and preparation method thereof

A color-changing gold and copper alloy technology, applied in the manufacture of tools, heat treatment equipment, furnaces, etc., can solve the problems of poor discoloration resistance and high production costs, and achieve low production costs, reasonable alloy components, and environmental friendliness

Active Publication Date: 2021-07-27
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 components are Zn: 10wt.%, Al: 6wt.%, Ce: 0.1wt.%, Co: 0.1wt%, B: 0.008wt%, and the balance is copper. , pure aluminum, pure cobalt, copper-cerium, copper-boron intermediate alloy and electrolytic copper; first, dry the electrolytic copper, add aluminum, heat and melt, and use cryolite, calcium fluoride and coke borax as covering agents during the melting process. The volume percentage is 1:1:1. Then, add zinc, after melting, add pure cobalt, copper-cerium, copper-boron intermediate alloy to the melt to obtain an alloy melt, control the furnace temperature at 1220°C, convert the furnace, and carry out semi-continuous casting at 1200°C, the average Casting speed 5.5m / h. Heat the copper alloy ingot at 820°C for 6 hours, perform 5 passes of hot rolling, the final rolling temperature is 720°C, control the total hot rolling deformation to 80%, water quenching, and obtain a hot rolled billet; carry out surface milling, double side milling The thickness of each is 0.5mm,...

Embodiment 2

[0059] The components are Zn: 12wt.%, Al: 5wt.%, Ce: 0.1wt.%, Co: 0.2wt%, B: 0.01wt%. , pure aluminum, pure cobalt, copper-cerium, copper-boron intermediate alloy and electrolytic copper; first, dry the electrolytic copper, add aluminum, heat and melt, and use cryolite, calcium fluoride and coke borax as covering agents during the melting process. The volume percentage is 1:1:1. Then, add zinc, after melting, add pure cobalt, copper-cerium, copper-boron intermediate alloy to the melt to obtain an alloy melt, control the furnace temperature at 1220°C, convert the furnace, and carry out semi-continuous casting at 1200°C, the average Casting speed 6.0m / h. Heat the copper alloy ingot at 820°C for 6 hours, carry out 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; The thickness of milling is 0.5mm, and multi-pass cold rolling is carried out, with a total deforma...

Embodiment 3

[0061] The components are Zn: 14wt.%, Al: 3wt.%, Ce: 0.1wt.%, Co: 0.2wt%, B: 0.01wt%, and the balance is the composition ratio of the golden copper alloy of copper, taking pure zinc respectively , pure aluminum, pure cobalt, copper-cerium, copper-boron intermediate alloy and electrolytic copper; first, dry the electrolytic copper, add aluminum, heat and melt, and use cryolite, calcium fluoride and coke borax as covering agents during the melting process. The volume percentage is 1:1:1. Then, add zinc, after melting, add pure cobalt, copper-cerium, copper-boron intermediate alloy to the melt to obtain alloy melt, control the furnace temperature at 1220°C, convert the furnace, and carry out semi-continuous casting at 1200°C, the average Casting speed 6.0m / h. Heat the copper alloy ingot at 820°C for 6 hours, carry out 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 bi...

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Abstract

A gold copper alloy with high discoloration resistance and a preparation method thereof. The alloy includes the following components Zn, Al, Co, Ce, B with the balance being Cu. The preparation process includes: melting and casting; hot rolling; cold rolling, solution quenching; cold finishing rough rolling, cold finishing rolling, and finished product annealing. The alloy produced by the invention has high golden degree, excellent heat and cold workability, small deformation resistance, no precious metal elements, and low cost. The composition of the alloy in the present invention is reasonable and simple, and the gold color of the alloy is improved through the reasonable collocation of cheap aluminum and zinc. Cobalt and copper alloys have very low vacancy binding energies, which can effectively combine with vacancies in copper alloys, block the diffusion channel of Zn atoms, and improve the alloy's resistance to dezincification corrosion. The alloy has simple production process, low production cost, good processing performance and high gold degree. Suitable for industrial production.

Description

technical field [0001] The invention relates to a gold brass alloy with high discoloration resistance and a preparation method, which are mainly used in artworks, bookmarks, commemorative coins (chapters) and various decorative materials. It belongs to the field of new material technology. Background technique [0002] Gold has a dazzling 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 price, as a large art market, a large number of applications are restricted. Therefore, high-quality and cheap imitation gold alloy products are getting more and more attention. [0003] The commonly used imitation gold products at home and abroad are mainly copper-based imitation gold products. Domestic research is mainly to add aluminum, zinc, tin, ni...

Claims

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Application Information

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Patent Type & Authority Patents(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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