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 bronze alloy material suitable for gravity casting. The alloy material comprises the following chemical elements: 0.1 percent or less than 0.1 percent of lead, 0.005 percent or less than 0.005 percent of aluminums, 0.15 percent or less than 0.15 percent of iron, 6.0 to 8.0 percent of zinc, 4.0 to 6.0 percent of tin, 1.0 to 3.0 percent of bismuth, 1.0 percent or less than 1.0 percent of nickel, 0.05 percent or less than 0.05 percent of phosphorus, 0.01 percent or less than 0.01 percent of silicon, 0.25 percent or less percent of arsenic, balance copper and unavoidable impurities. The lead content of the bronze alloy material is greatly reduced and conforms to the environmental protection and health requirements, and meanwhile the lead-free environment-friendly bronze 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 bronze alloy, in particular to a lead-free and easy-cutting environmentally friendly bronze 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 and lead-containing bronze that are widely used at present and cause adverse effects on human body and environment. . Background technique [0002] Casting bronze is easy to manufacture castings with complex shapes. Bronze castings have good corrosion resistance, pressure resistance and wear resistance, and some of them are used for water supply system castings and valve parts. Cast tin bronze has excellent corrosion resistance, especially in the atmosphere, fresh water, sea water, alkaline solution and superheate...

AI Technical Summary

Problems solved by technology

However, the above-mentioned bronze-based low-lead alloys ensure high-temperature tensile properties, and when they are used in casting, especially gravity casting, many casting defects will appear, and the casting performance of lead-containing bronze is greatly reduced, which affects its application in the metal forming industry.

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