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

Abstract

The invention relates to a lead-free environment-friendly silicon brass alloy material suitable for gravity casting. The chemical elements of the alloy material comprises 70 to 80 percent of brass, 0.7 to 3.0 percent of silicon, 0.2 to 0.70 percent of aluminum, 0.1 percent or less than 0.1 percent of lead, 0.5 percent or less than 0.5 percent of iron, 0.3 percent or less than 0.3 percent of tin, 0.5 percent or less than 0.5 percent of nickel, balance zinc and unavoidable impurities. The lead content of the silicon brass alloy material is greatly reduced and conforms to the environmental protection and health requirements, and meanwhile the lead-free environment-friendly silicon 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 silicon brass alloy material with excellent casting performance, corrosion resistance performance 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 o...

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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