Lead-free antimony-nickel-brass alloy

Abstract

The invention relates to a lead-free antimony-nickel-brass alloy comprising the components of, by weight, 59-64% of copper (Cu), 0.01-0.25% of antimony (Sb), 0.1-1.5% of nickel (Ni), 0.01-0.15% of aluminum (Al), 0.1-0.8% of tin (Sn), 0.01-0.45% of magnesium (Mg), 0.05-0.5% of zirconium (Zr), and balance of zinc (Zn) and unavoidable impurities, wherein a total amount of copper and zinc in the lead-free antimony-nickel-brass alloy is higher than 96.2wt%. The lead-free antimony-nickel-brass alloy has excellent material performance, good toughness and processability, improved strength, and improve corrosion resistance.

Description

technical field [0001] The invention relates to an environment-friendly brass alloy, in particular to a lead-free antimony-nickel brass alloy. Background technique [0002] The main components of existing non-environmentally friendly leaded brass are copper and zinc, the ratio of which is usually about 7:3 or 6:4, and usually contains a lot of impurities. In order for brass to have good machinability properties, known brass compositions contain 1-3% lead by weight. Leaded brass is an important material in industry and is widely used in products such as pipelines, faucets, metal fittings or metal valves in water supply / drainage systems. [0003] However, with the rising awareness of environmental protection, the impact of heavy metals on human health and environmental pollution have gradually received more attention. Therefore, it is the current trend to limit the use of lead-containing alloys. Japan, the United States and other countries have successively revised relevant...

AI Technical Summary

Problems solved by technology

[0007] And Chinese Patent Publication No. CN101403056 discloses a lead-free brass alloy with bismuth and manganese instead of lead; yet, high bismuth content is prone to defects such as cracks and slag inclusions, while bismuth is low in manganese and high in hardness and is not easy to break chips. poor sex

[0008] In addition, there are also documents disclosing the improvement of the process of lead-free copper alloy or the process of washing lead. For example, U.S. Pat. , the traditional lead washing process can only reduce the lead precipitation on the surface contacting with water when the lead-containing products are immersed in water, and cannot reduce the lead content in the production raw material components to meet the requirements of the California AB-1953 regulation. To below 0.25wt%

[0009] This shows, existing brass alloy product and manufacture method thereof obviously still have inconvenience and defect, and urgently need to be further improved

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