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A kind of low-lead high-zinc-silicon brass alloy and preparation method thereof

A silicon brass, high zinc technology, applied in the field of low lead and high zinc silicon brass alloy and its preparation, can solve the problems of easy thermal cracking, poor welding performance, serious tool wear, etc. Cutting efficiency, the effect of reducing loose defects

Active Publication Date: 2018-11-02
JOMOO KITCHEN & BATHROOM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the Chinese invention patent 94192613.3 applied by Kohler Company of the United States discloses a low-lead bismuth-containing brass, which is composed of 55-70wt% Cu, 30-45wt% Zn, 0.2-1.5wt% Bi, 0.2-1.5wt% Al , 0.1 ~ 1.0wt% Pb; the above-mentioned alloys have high Bi content, are prone to hot cracking, and have poor welding performance, so it is difficult for practical application
The Chinese invention patent 200580046460.7 published by Japan Sambo discloses a free-cutting copper alloy containing a very small amount of lead, which is composed of 71.5-78.5wt% Cu, 2.0-4.5wt% Si, 0.005-0.02wt% Pb, and the balance It is Zn; the alloy has high Cu content and is expensive, so its market competitiveness is not strong
The Chinese invention patent 200410015836.5 of Ningbo Powerway Group discloses a lead-free free-cutting antimony brass alloy, which consists of 55-65wt% Cu, 0.3-2.0wt% Sb, 0.4-1.6wt% Mn, and 0.1-1.0wt% other elements %; the content of Sb in the above-mentioned alloy is relatively high, and its precipitation amount is easy to exceed the limit of 0.6 μg / L stipulated in NSF61 and GB / T 18145, so it cannot be popularized and applied in the field of drinking water system
Xiamen Luda's Chinese invention patent 201010117783.3 discloses an environmentally friendly manganese brass alloy and its manufacturing method. In this technical solution, due to the manganese content up to 6.5wt%, the hardness of the alloy is high, the wear of the tool is serious, and the cutting performance Poor, so hard to scale up

Method used

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  • A kind of low-lead high-zinc-silicon brass alloy and preparation method thereof
  • A kind of low-lead high-zinc-silicon brass alloy and preparation method thereof
  • A kind of low-lead high-zinc-silicon brass alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Weigh Cu, Si, Zn, Al, Sn, Pb, Sb and B, Fe, P, Ti, Zr and copper rich in lanthanide mixed rare earths according to the mass percentage of the composition of low-lead, high-zinc-silicon brass alloy In each copper-based master alloy, the mass fraction of Cu is greater than 90wt%, and the above mass percentages are as follows: Cu 61.0wt%, Si 0.52wt%, Al 0.50wt%, Sn 0.05wt%, Pb 0.13wt%, B 0.0016wt%, P 0wt%, Sb 0wt%, Fe 0.038wt%, Ti 0.06wt%, Zr 0wt%, and lanthanide-rich mixed rare earth 0wt%, the balance is Zn and the total amount of impurities is not more than 0.5wt% ;

[0049] (2) Si is placed on the bottom of the induction furnace, Cu and Zn raw materials are placed on top of Si, refined by adding a slag remover and covered with charcoal, the temperature is raised to 1050-1200°C until the materials are completely melted, and the surface scum is filtered off;

[0050] (3) Add a copper-based master alloy of Fe and P to the material obtained in step (2), stir evenly and...

Embodiment 2

[0057] (1) Weigh Cu, Si, Zn, Al, Sn, Pb, Sb and B, Fe, P, Ti, Zr and copper rich in lanthanide mixed rare earths according to the mass percentage of the composition of low-lead, high-zinc-silicon brass alloy In each copper-based master alloy, the mass fraction of Cu is greater than 90wt%, and the above mass percentages are as follows: Cu 61.5wt%, Si 0.55wt%, Al 0.48wt%, Sn 0.24wt%, Pb 0.14wt%, B0.0012wt%, P0.03wt%, Sb0.15wt%, Fe0wt%, Ti0wt%, Zr0.06wt% and lanthanide-rich mixed rare earth 0wt%, the balance is Zn and impurities whose total amount is not more than 0.5wt%;

[0058] (2) Si is placed on the bottom of the induction furnace, Cu and Zn raw materials are placed on top of Si, refined by adding a slag remover and covered with charcoal, the temperature is raised to 1050-1200°C until the materials are completely melted, and the surface scum is filtered off;

[0059] (3) Add a copper-based master alloy of Fe and P to the material obtained in step (2), stir evenly and leave i...

Embodiment 3

[0065] (1) Weigh Cu, Si, Zn, Al, Sn, Pb, Sb and B, Fe, P, Ti, Zr and copper rich in lanthanide mixed rare earths according to the mass percentage of the composition of low-lead, high-zinc-silicon brass alloy In each copper-based master alloy, the mass fraction of Cu is greater than 90wt%, and the above mass percentages are as follows: Cu 62.0wt%, Si 0.56wt%, Al 0.51wt%, Sn 0.06wt%, Pb 0.15wt%, B 0.0015wt%, P 0.12wt%, Sb 0.20wt%, Fe0wt%, Ti0wt%, Zr0wt%, and lanthanide-rich mixed rare earth 0wt%, and the balance is Zn and impurities whose total amount is not more than 0.5wt%;

[0066] (2) Si is placed on the bottom of the induction furnace, Cu and Zn raw materials are placed on top of Si, refined by adding a slag remover and covered with charcoal, the temperature is raised to 1050-1200°C until the materials are completely melted, and the surface scum is filtered off;

[0067] (3) Add a copper-based master alloy of Fe and P to the material obtained in step (2), stir evenly and le...

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Abstract

The invention discloses low-lead high-zinc silicon brass alloy and a preparation method of the same. The low-lead high-zinc silicon brass alloy is composed of, by weight, 60.5-62.0% of Cu, 0.45-0.6% of Si, 0.4-0.55% of Al, 0.01-0.3% of Sn, 0.1-0.15% of Pb, 0.0010-0.0020% of B, 0.015-0.7% of selectively added elements, and the balance being Zn and impurities being not more than 0.5% in total weight, wherein the selectively added elements comprise at least two of P, Sb, Fe, Ti, Zr and lanthanide-rich mixed rare earth. The total weight of Zn and Cu is more than 97.0 wt% and the content of Zn is more than 36.0 wt%. Through multiple alloying, especially strict limit of contents of the Cu, Si and Al, the low-lead high-zinc silicon brass alloy is balanced and stable in various performances.

Description

technical field [0001] The invention belongs to the technical field of brass alloys, and in particular relates to a low-lead, high-zinc-silicon brass alloy and a preparation method thereof. Background technique [0002] Lead brass is widely used in electronics and daily hardware industries because of its good cold and hot forming performance, machinability and corrosion resistance. However, the lead content in lead brass is high, which is easy to precipitate and pollute the environment. Especially when used in the drinking water system, it will cause serious harm to the human body. Countries around the world have successively issued corresponding regulations to strictly limit the lead content in copper alloys, such as the European Electrical and Electronic Equipment Directive WEEE and the RoHS Directive. my country's GB / T 18145-2014 "Ceramic Chip Sealing Tap" also stipulates that the amount of lead precipitated in drinking water system components should be less than 5μg / L, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/03
CPCC22C1/03C22C9/04
Inventor 林孝发林孝山汪火良周年润
Owner JOMOO KITCHEN & BATHROOM
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