Low-plumbum copper alloy

Abstract

The invention relates to a low-lead copper alloy comprising the following elements in percentage by weight: 0.05-0.3% of plumbum (Pb), 0.3-0.8% of aluminum (Al), 0.01-0.4% of bismuth (bi), 0.1-2% of nickel (Ni), and more than 96.5% of copper (Cu) and zinc (Zn), wherein the content of the copper in the low-plumbum copper alloy is 58-70%. The low-plumbum copper alloy of the invention has the advantages of favorable material performance, favorable tenacity and favorable processing performance, and can enhance the intensity and corrosion resistance of the alloy.

Description

technical field [0001] The present invention relates to a copper alloy, and in particular, the present invention relates to a low-lead brass alloy. Background technique [0002] The main components of brass are copper and zinc, usually in a ratio of about 7:3 or 6:4, and usually contain small amounts of impurities. In order to improve the properties of brass, it is known that brass contains lead (mostly 1-3wt%) to achieve the mechanical properties required by the industry, and thus becomes an important material in industry, and is widely used in pipelines, faucets, and metals in water supply / drainage systems Devices or metal valves and other products. [0003] However, with the rise of environmental protection awareness, the impact of heavy metals on human health and environmental pollution have gradually been paid attention to. Therefore, it is the current trend to limit the use of lead-containing alloys. Japan, the United States and other countries have successively rev...

AI Technical Summary

Problems solved by technology

However, known anti-dezincification brass usually has a relatively high lead content (mostly 1-3wt%), which is beneficial to the cold / hot processing of brass materials, but does not meet environmental protection requirements, and the lead dissolution rate is high, and the preparation process is easy lead pollution in

[0007] Therefore, the industry is eager to develop new brass materials, looking for alloy formulations that can replace leaded brass and achieve dezincification resistance, but still have to take into account casting performance, machinability, corrosion resistance, and mechanical properties

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