Rare earth manganese brass alloy and producing process thereof

Abstract

The invention relates to a rare earth brass alloy with environment protection and easy cutting, which achieves the purpose of improving the easy cutting of the alloy by adding Bi and Mn to replace the lead in Pb brass. The alloy has the components of 55.0-65wt percent of Cu, 0.1-2.5wt percent of Bi, 0.1-1.0wt percent of Mn, 0-3.0wt percent of Sn, 0-1.0wt percent of Ni, 0.1-1.0wt percent of Al, 0.01-0.05wt percent of one or two of Ce and La, the rest of Zn and other inevitable impurities, wherein Bi, Si, Ce, La and Ce+La are added respectively in the form of master alloys of Cu-Bi, Cu-Si, Cu-Ce, Cu-La and Cu-Ce-La. The alloy has the advantages of favorable cutting performance, cold and hot working performances and cast performance, little thermal fragment trend, simple production process of supporting preparation in the existing Pb brass production equipment, low alloy cost, good polishing performance and welding performance, etc.

Description

technical field [0001] The invention belongs to the technical field of metal material manufacture, and in particular relates to a lead-free and environment-friendly free-cutting rare earth manganese brass alloy. Background technique [0002] Lead brass has good cutting performance, mechanical performance, casting performance and corrosion resistance, which can meet the needs of production and use of various castings and accessories in plumbing and sanitary systems. But because lead brass contains lead of different contents, lead brass is easy to leach lead in weakly acidic tap water, but lead is harmful to human body and environment. [0003] With the increasing awareness of environmental protection and health, various countries have successively issued relevant regulations to limit the content of lead in tap water. Lead-free and free-cutting copper alloys have become a hot research field. [0004] At present, domestic colleges and scientific research institutions have been...

AI Technical Summary

Problems solved by technology

However, due to the rapid rise in prices of tellurium, bismuth, and selenium, especially tellurium and selenium in recent years, the production costs of tellurium brass, bismuth brass, and selenium brass have soared sharply, bringing huge pressure on production costs to manufacturers

For silicon brass and manganese brass, due to the low price of silicon and manganese, the alloy is relatively cheap, but due to its poor plasticity and cutting performance, it leads to high scrap rate, serious tool damage, and low production efficiency.

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