Dezincification corrosion resistant low-stibium aluminum yellow brass alloy and manufacturing method thereof

Abstract

The invention discloses a low-stibium aluminum-brass alloy with dezincification corrosion resistance and a preparation method thereof. The alloy comprises the following chemical components: 58.8 to 63 weight percent of copper, 0.25 to 0.65 weight percent of aluminum, 0.105 to 0.35 weight percent of stibium, 0.03 to 0.25 weight percent of lead, 0.04 to 1.5 weight percent of other element, and the balance being zinc and inevitable impurities, wherein the weight percentage of the copper, the zinc, the aluminum, the stibium and the lead is more than 98.2 weight percent, and the other element is at least one element selected from boron, tin, phosphorus, nickel, bismuth and iron. The preparation method comprises: adopting methods of alloying treatment, covering, protecting, dreg removing, purifying and refining, casting the low-stibium aluminum-brass alloy by fusion, thermally processing the alloy at a temperature of between 680 and 740 DEG C; and then carrying out cold processing and intermediate thermal treatment on the alloy, and carrying out stress relieving annealing at a temperature of lower than 380 DEG C after a finished product is subjected to cold processing. The alloy product has the advantages of excellent dezincification corrosion resistance, thermal forming property, mechanical property and easy polishing and plating properties, good cutting property, remarkably excellent hygienic safety, simple manufacturing technique, low cost and easy recycling.

Description

technical field [0001] The invention relates to a complex brass alloy, in particular to a low-antimony aluminum brass with excellent dezincification resistance, hygienic and safety performance, excellent mechanical properties, hot and cold forming performance, cutting performance and polishing and electroplating performance Alloys and their manufacturing methods are especially suitable for drinking water supply systems and sanitary ware, pipes, castings, valves, connectors, hardware decoration, electronic telecommunications, household electrical appliances, and parts manufacturing in machinery manufacturing. It is a A metal material that is beneficial to the ecological environment. Background technique [0002] Complex brass is a low-cost material with high strength and excellent hot and cold forming properties. It is widely used in hardware, automobile transportation, drinking water engineering, water supply systems and ships, electronic telecommunications, and wear-resista...

AI Technical Summary

Problems solved by technology

[0004] In recent years, complex brasses resistant to dezincification at home and abroad have added rare earth elements and arsenic to brass alloys to form complex brasses resistant to dezincification. Although the mechanical properties, formability and Dezincification corrosion resistance, but also has certain shortcomings, even can not fully meet the new requirements of human health and ecological environment, for example: Japanese patent JP56-29643 "corrosion-resistant fast-cut brass", the alloy is copper-zinc- Rare-earth brass alloy, characterized by containing 8-43wt% zinc, 0.05-2wt% rare earth elements, and one or more of magnesium, aluminum, iron, tin, phosphorus, silicon, arsenic, and antimony can be selected The sum of the elements is 0.01-2wt%, and the balance is copper

Although it can improve the dezincification corrosion resistance, when the rare earth elements are added more than 0.05% in the casting process, the operation is more complicated, and in continuous large-scale production, the content stability of rare earth elements is poor, the cost is high, and even affects Casting properties

The use of arsenic-added brass alloys can also improve the dezincification resistance of brass, but it is easy to cause environmental pollution during the melting and casting process, and even cause harm to human health.

Images