Lead-free environment-friendly bismuth brass alloy rod or alloy ingot and preparation method thereof

Abstract

The invention relates to a lead-free environment-friendly bismuth brass alloy rod or an alloy ingot, which comprises the following chemical elements in percentage by weight: 57 to 68 percent of copper, 0.4 to 2.5 percent of bismuth, less than or equal to 0.25 percent of lead, 0.4 to 0.8 percent of aluminum, 0.02 to 0.5 percent of iron, 0.02 to 0.5 percent of tin, 0.01 to 0.5 percent of nickel, less than or equal to 0.02 percent of phosphorus, less than or equal to 0.02 percent of arsenic, less than or equal to 0.02 percent of manganese, less than or equal to 0.02 percent of sulfur, less than or equal to 0.005 percent of chromium, and the balance of zinc. The lead content of the bismuth brass alloy materials is greatly reduced, and accords with the requirements of environmental protection and health; and meanwhile, the bismuth brass alloy materials have excellent casting performance, are applicable to casting, in particular large-scale gravity casting, and have wide application prospect in sanitary appliance industry.

Description

technical field [0001] The invention relates to a lead-free brass alloy, in particular to a lead-free, easy-to-cut, environmentally friendly bismuth brass alloy material with excellent casting performance, corrosion resistance and subsequent machining performance, and its appearance is in the form of an alloy rod or alloy ingot. Background technique [0002] Lead brass has excellent mechanical and physical properties, good casting performance and cutting performance, and is cheap, so it is widely used in instrumentation, electronics, electrical appliances, daily hardware, drinking water systems, etc., especially Hpb59-1 The production and application volume is the largest. [0003] However, lead and its compounds are one of the 17 chemical substances that seriously endanger human life and the natural environment. The lead in the alloy is easily invaded or detached from the matrix during use, and the lead in industrial waste gas seeps into the groundwater system. Various fo...

AI Technical Summary

Problems solved by technology

The above-mentioned alloy materials take into account many uses as plastic alloys, rolled alloys or cast alloys, but cause practical shortcomings in the process of practical application

For example, due to poor fluidity in the casting process, if it is used in gravity casting, more casting defects such as cracks, lack of pouring, and shrinkage cavities will appear, resulting in a decline in the yield of castings, affecting casting costs and castings as high-end products. application

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