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

Abstract

A gold brass alloy with high tarnish resistance and a preparation method thereof. The alloy includes the following components Mn, Sn, Ni, Zn, Sr, Ce, B, Si, the balance being Cu and unavoidable impurities. The preparation process includes: melting and casting; hot rolling; cold rolling, intermediate annealing; cold finish rough rolling, cold finish rolling, and finished annealing. The alloy produced by the invention has high golden degree, good discoloration resistance, excellent heat and cold processing performance, small deformation resistance, no precious metal elements, and low cost. The composition of the alloy in the present invention is reasonable, and the gold color of the alloy is improved through a reasonable combination of cheap manganese, nickel, zinc and tin. The zinc content is lower than 20%, which can avoid dezincification corrosion, and the reasonable combination of strontium, cerium, boron and silicon , can improve process performance and improve anti-tarnish performance. The alloy has simple production process, low production cost, good processing performance, high gold degree, excellent anti-discoloration performance in salt spray, high humidity, artificial sweat and other environments, and is 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...

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 composition, low raw material price, The production process is simple, the production cost is low, the processing performance is good, the gold degree is high, the anti-discoloration performance is excellent in the environment such as salt spray, high humidity, artificial sweat, the environment-friendly high anti-discoloration golden copper alloy and its preparation method, to meet various Demand for high tarnish-resistant, golden copper alloys for decorative materials and handicrafts