Easy cutting brass alloy containing silicon without lead

A brass alloy, free-cutting technology, applied in the field of silicon-containing lead-free free-cutting brass alloys, can solve problems such as pollution, lead volatilization or dissolution, and achieve the effects of high safety factor, long service life, and scientific and reasonable formula

Inactive Publication Date: 2005-05-18
ZHEJIANG HAILIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pollution and harm caused by lead itself as a heavy metal has always existed. For example, after lead brass is used in plumbing and sanitary products, in addition to the pollution caused by the "lead" in it, what is more serious is that the lead in the production and It will volatilize or dissolve during use, which can easily lead to the secretion of human hormones and the intellectual development of infants and young children

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The preparation of the silicon-containing lead-free free-cutting brass alloy of the present invention adopts a power-frequency cored induction furnace, and in the copper-zinc alloy melt, according to the composition ratio and feeding sequence, zinc ingots and copper-silicon intermediate alloys are added, and the copper-silicon intermediate alloy is used. Vertical semi-continuous casting to prepare a cylindrical copper alloy ingot, the composition of each component by weight percentage is: copper (Cu) 80-83%, silicon (Si) 3.5-4.5%, arsenic (As) 0.03% ~0.06%, the rest is zinc (Zn) and impurities whose total amount is not more than 0.05%.

[0012] project

Elongation (%)

Tensile strength (N / MM 2 )

Hardness (HV)

MAX

45

600

130

MIN

15

380

80

[0013] 1. Thermal processing performance: comparable to Japanese brand C3771;

[0014] 2. Cutting performance: comparable to Japanese brand C3...

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PUM

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Abstract

The present invention belongs to the field of metal material producing technology, and the easy-to-cut brass alloy contains Cu 80-84 wt%, Si 2.5-5.0 wt%, As 0.02-0.10 wt%, except Zn and 0.05 wt% below impurity. It may be used in replacing widely applied corresponding lead brass alloy to avoid lead pollution while ensuring excellent cutting performance, mechanism performance and conducting performance.

Description

technical field [0001] The invention relates to a silicon-containing lead-free free-cutting brass alloy, which belongs to the technical field of metal material manufacture. Background technique [0002] With the improvement of people's living standards and the intensification of world economic integration, countries all over the world, especially developed countries, have higher and higher requirements for environmental protection, and pay more attention to the factors that seriously affect our health. Lead brass, as a relatively common metal processing raw material since ancient times, is widely used in plumbing and sanitary ware and other various production fields. However, the pollution and harm caused by lead itself as a heavy metal has always existed. For example, after lead brass is used in plumbing and sanitary products, in addition to the pollution caused by the "lead" in it, what is more serious is that the lead in the production and It will vol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04
Inventor 唐吉苗曹建国郭均华姜少军冯海良冯亚丽李国平冯焕锋
Owner ZHEJIANG HAILIANG
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