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Low-lead brass alloy

a technology of low-lead brass and alloy, which is applied in the field of low-lead brass alloy, can solve the problems of increasing environmental problems, affecting human health and ecological balance, and unable to survive on the surface of harmful bacteria, and achieves excellent tensile strength, elongation rate, and dezincification resistance and cutting performance. high

Inactive Publication Date: 2015-12-24
JIANGXI AUDY BRASSWORK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a new brass alloy that has excellent performance in strength, elongation rate, dezincification resistance, and cutting performance. It can replace traditional brass with high lead content and meets the demands of human society. The alloy contains reduced lead content, maintained copper content, and added aluminum to improve cutting performance. Aluminum also increases corrosion resistance and dezincification resistance, improves cast flowability, and enhances strength and hardness. Other elements like antimony, tin, magnesium, arsenic, and zirconium can further improve cutting performance, strength, plasticity, corrosion resistance, and wear resistance.

Problems solved by technology

Copper has excellent electrical conductivity and environmental friendliness, and bacteria harmful to the human can't survive on its surface.
However, lead has a destructive effect on the human health and ecological balance.
In addition, the environmental problem is increasingly outstanding, and the working environment is becoming more serious.
As a result, the surface strength of brass products is reduced, and the brass tube may even perforate.
This greatly reduces the lifetime of brass products and causes problems in application.

Method used

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embodiment

[0028]Table 1 lists 15 different constituents for the low-lead brass alloy, each constituent being in the unit of weight percentage (wt %).

TABLE 1copperzincLeadmagnesiumaluminumantimonytinboronironnickelarseniczirconiumNo.(Cu)(Zn)(Pb)(Mg)(Al)(Sb)(Sn)(B)(Fe)(Ni)(As)(Zr)163.00036.2330.215—0.550———————262.54236.5780.240—0.638———————362.50036.6380.160—0.700———————462.51136.6480.1680.0100.5510.020————0.090—562.78036.1360.1790.0090.589—0.200———0.105—662.99335.9670.200—0.688—0.150—————762.56736.5410.161—0.560——0.00050.050—0.120—862.87436.1230.1870.0070.653————0.150—0.004963.00036.1160.192—0.6700.015—————0.0051062.51036.4160.167—0.6890.0180.198—————1162.91336.8600.1980.008—0.019——————1262.78036.2500.2010.0090.580—0.178—————1362.50036.5410.200—0.6630.017—0.00070.076———1462.83135.9870.2120.0100.578—0.132——0.1320.1120.0041562.67035.8450.1980.0080.6740.0170.1880.00090.1500.1430.1010.003

[0029]Measurements about cutting performance, dezincification corrosion resistant performance, tensile strengt...

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Abstract

The invention relates to a low-lead brass alloy, comprising: by the total weight of the brass alloy, 62.5-63 wt % copper, 0.16-0.24 wt % lead, 0-0.02 wt % antimony, 0-0.01 wt % magnesium, 0-0.2 wt % tin, 0.0005-0.0009 wt % boron, 0.55-0.7 wt % aluminum, 0.05-0.15 wt % iron, 0-0.15 wt % nickel, 0.09-0.12 wt % arsenic, 0-0.005 wt % zirconium, 0-0.01 wt % impurities, and a balance of zinc.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of Chinese patent application No.201410282838.4, filed on Jun. 23, 2014. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of specification.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a low-lead brass alloy.[0004]2. Background of the Invention[0005]Copper has excellent electrical conductivity and environmental friendliness, and bacteria harmful to the human can't survive on its surface. Other elements are added into copper, so as to improve its performance. For example, the addition of lead into the brass alloy containing copper and zinc significantly improves the cutting performance of the brass. However, lead has a destructive effect on the human health and ecological balance. It is also a trend around the world that there are increasing restrictions on the application of lead-containin...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C22C9/04
CPCC22C9/04C22C9/01
Inventor LI, JIADE
Owner JIANGXI AUDY BRASSWORK
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