Leadless environment friendly bismuth brass alloy material suitable for gravity force cast and manufacture method thereof

Abstract

The invention relates to a lead-free environment-friendly bismuth brass alloy material suitable for gravity casting. The alloy material comprises the following chemical elements: 57 to 63 percent of brass, 0.1 percent or less than 0.1 percent of lead, 0.2 to 0.65 percent of aluminum, 0.5 percent or less than 0.5 percent of iron, 0.1 to 3.0 percent of tin, 0.4 to 3.0 percent of bismuth, 0.5 percent or less than 0.5 percent of nickel, balance zinc and unavoidable impurities. The lead content of the brass alloy material of the invention is greatly reduced and conforms to the environmental protection and health requirements, and meanwhile the lead-free environment-friendly brass alloy material has excellent casing performance, is suitable for casting, in particular for larger-scale gravity casting, and has extensively application prospect in the sanitary-ware industry.

Description

technical field [0001] The invention relates to a lead-free brass alloy, in particular to a lead-free easy-cutting environment-friendly brass alloy material with excellent casting performance, corrosion resistance and subsequent machining performance. They are especially suitable for water supply system castings, valves, etc. They are metal materials that are beneficial to human health and environmental protection, and are also excellent substitutes for lead brass, which is widely used at present and can cause adverse effects on the human body and the environment. 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 chemica...

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, in the casting process, the fluidity is often poor, the casting finish is not enough, and the grain arrangement is not particularly uniform

If it is used in gravity casting, more casting defects will appear, resulting in a decline in the yield of castings and affecting the application of castings as high-end products

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