A kind of anti-dezincification lead-free low silicon arsenic brass and preparation method thereof

An anti-dezincification and brass technology, which is applied in the field of copper alloys for bathroom and kitchen industries, can solve the problems of high cost, poor cutting performance, and low processing efficiency of silicon brass, so as to save smelting time, improve strength and hardness, prevent The effect of oxidation burnout

Active Publication Date: 2021-01-19
龙岩市鸿航金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of silicon brass has high cost, significantly worse cutting performance than lead brass, and low processing efficiency
According to the report of patent CN 104651660 A, domestic bathroom manufacturers also use low-copper and low-silicon cast silicon brass materials, which are mainly composed of the following raw materials in mass percentages: Cu60-63, Si0.5-0.9, but the Pb content is still high At 0.1%, the dezincification layer depth is 152.86~174.62μm, although it is smaller than the dezincification layer depth of HPb59-1 tested under the same conditions (297.83μm), but it still cannot meet the requirements of AS2345~2006 (≤100μm)

Method used

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  • A kind of anti-dezincification lead-free low silicon arsenic brass and preparation method thereof
  • A kind of anti-dezincification lead-free low silicon arsenic brass and preparation method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0023] Embodiment 1: A kind of anti-dezincification lead-free low silicon arsenic brass is made up of the raw material of following mass percent: Cu62%, Si0.6%, As0.07%, Al0.5%, Fe0.03%, Pb0 .06%, Zn36.7% and total 0.04% impurities.

[0024] The preparation method of the above-mentioned anti-dezincification lead-free low-silicon-arsenic brass includes:

[0025] 1) Add 200kg of pure red copper rice into the cored power frequency furnace first, the amount of pure red copper rice added here is 10% of the total raw materials, and when it is in a semi-molten state, the particle size is less than 1cm, accounting for 0.6% of the above total raw materials Put industrial pure silicon into a copper tube with a suitable diameter, press it horizontally into the copper liquid, and immediately spread 150g of red copper rice on the surface of the copper liquid. The amount of pure red copper rice added here is 7.5% of the total raw materials. Add 1kg of smelting and slag cleaning agent, and ...

Embodiment 2

[0033] An anti-dezincification lead-free low-silicon-arsenic brass is composed of the following raw materials in mass percentage: Cu65%, Si1.0%, As0.12%, Al0.8%, Fe0.1%, Pb0.09%, Zn32.79% and a total of 0.1% impurities.

[0034] The preparation method of the above-mentioned anti-dezincification lead-free low-silicon-arsenic brass includes:

[0035] 1) First add 300kg of pure copper rice into the cored industrial frequency furnace. The amount of pure copper rice added here is 15% of the total raw materials. Pure silicon, put it into a copper tube with a suitable diameter, press it into the copper liquid horizontally, and immediately spread 200 copper meters on the surface of the copper liquid. The amount of pure copper rice added here is 10% of the total raw materials. 1㎏ smelting slag cleaning agent, heat at 950-980°C for 20 minutes, so that silicon can be fully alloyed with copper rice under the condition of isolating oxygen; , copper-iron master alloy and copper-arsenic ma...

Embodiment 3

[0042] An anti-dezincification lead-free low-silicon-arsenic brass is composed of the following raw materials in mass percentage: Cu63%, Si0.8%, As0.10%, Al0.6%, Fe0.05%, Pb0.04%, Zn35.3% and a total of 0.11% impurities.

[0043] The preparation method of the above-mentioned anti-dezincification lead-free low-silicon-arsenic brass includes:

[0044] 1) First add 300kg of pure copper rice into the cored industrial frequency furnace. The amount of pure copper rice added here is 15% of the total raw materials. Pure silicon, put it into a copper tube with a suitable diameter, press it into the copper liquid horizontally, and immediately spread 200 copper meters on the surface of the copper liquid. The amount of pure copper rice added here is 10% of the total raw materials. 1㎏ smelting slag cleaning agent, heat at 950-980°C for 20 minutes, so that silicon can be fully alloyed with copper rice under the condition of isolating oxygen; , copper-iron master alloy and copper-arsenic m...

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Abstract

The invention relates to the field of copper alloys for kitchen and bathroom industries and provides a dezincification-resistant lead-free low-silicon arsenic brass which is good in dezincification corrosion resistance property and processing property and high in strength and a preparation method of the dezincification-resistant lead-free low-silicon arsenic brass. The method includes the steps that the following raw materials including, by mass, 62-65% of Cu, 0.6-1.0% of Si, 0.07-0.12% of As, 0.5-0.8% of Al, 0.03-0.1% of Fe, less than 0.1% of Pb and the balance Zn and no larger than 0.35% ofimpurities in total amount are smelted, refined and subjected to furnace front detection and casting, and then a low-silicon arsenic brass ingot of which the content of Pb is less than 0.1% is obtained.

Description

technical field [0001] The invention relates to the field of copper alloys used in the bathroom and kitchen industry, in particular to a dezincification-resistant lead-free low-silicon-arsenic brass and a preparation method thereof. Background technique [0002] Lead-free brass is the preferred brass alloy material for promotion and use in the bathroom and kitchen industry, and is used to replace lead brass. However, only bismuth brass and silicon brass have been used in small-scale market applications so far. Compared to other elements that replace lead, the cost of silicon is significantly lower. Silicon brass has good mechanical properties, better corrosion resistance than ordinary brass, no corrosion cracking tendency, good wear resistance, good pressure processability in cold and hot states, easy welding and brazing, and good machinability , its thermal conductivity is the lowest among brass, and can be widely used in ship parts, steam pipes and water pipe fittings, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/03C22C1/06
CPCC22C1/03C22C1/06C22C9/04
Inventor 陈永禄彭秀华王秋燕廖春荣蔡文伟蔡新疆
Owner 龙岩市鸿航金属科技有限公司
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