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Method for preparing dezincification-resistant, lead-free, low-silicon and low-arsenic brass tubes

A technology of anti-dezincification and brass tubes, 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, The effect of preventing oxidation burn

Active Publication Date: 2018-03-27
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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  • Method for preparing dezincification-resistant, lead-free, low-silicon and low-arsenic brass tubes
  • Method for preparing dezincification-resistant, lead-free, low-silicon and low-arsenic brass tubes
  • Method for preparing dezincification-resistant, lead-free, low-silicon and low-arsenic brass tubes

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: An anti-dezincification lead-free low-silicon-arsenic brass tube is composed of the following raw materials in mass percentage: Cu62%, Si0.6%, As0.07%, Al0.5%, Fe0.03%, Pb0.06%, Zn36.7% and total 0.04% impurities.

[0026] The preparation method of the above-mentioned dezincification-resistant lead-free low-silicon-arsenic brass tube includes melting the above-mentioned raw materials with the mass percentage, casting them into copper ingots → extruding them into copper tube blanks → stretching → annealing → inspection of finished copper tubes → The step of putting the finished copper pipe into storage; wherein, the step of introducing and casting copper ingots includes:

[0027]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 m...

Embodiment 2

[0041] A method for preparing an anti-dezincification lead-free low-silicon-arsenic brass tube, which is composed of the following raw materials in mass percentage: Cu65%, Si1.0%, As0.12%, Al0.8%, Fe0.1%, Pb0 .09%, Zn32.79% and total 0.1% impurities.

[0042] The preparation method of the above-mentioned dezincification-resistant lead-free low-silicon-arsenic brass tube includes melting the above-mentioned raw materials with the mass percentage, casting them into copper ingots → extruding them into copper tube blanks → stretching → annealing → inspection of finished copper tubes → The step of putting the finished copper pipe into storage; wherein, the step of introducing and casting copper ingots includes:

[0043] 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 horizo...

Embodiment 3

[0054] A method for preparing an anti-dezincification lead-free low-silicon-arsenic brass tube, which is composed of the following raw materials in mass percentage: Cu63%, Si0.8%, As0.10%, Al0.6%, Fe0.05%, Pb0 .04%, Zn35.3% and total 0.11% impurities.

[0055] The preparation method of the above-mentioned dezincification-resistant lead-free low-silicon-arsenic brass tube includes melting the above-mentioned raw materials with the mass percentage, casting them into copper ingots → extruding them into copper tube blanks → stretching → annealing → inspection of finished copper tubes → The step of putting the finished copper pipe into storage; wherein, the step of introducing and casting copper ingots includes:

[0056]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 horizo...

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Abstract

The invention relates to the field of copper alloys for toilet and kitchen industries and provides a method for preparing dezincification-resistant, lead-free, low-silicon and low-arsenic brass tubeswhich are good in dezincification corrosion resistance, high in strength and good in processing performance. The method comprises the steps of smelting the following raw materials in percentage 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, Pb less than 0.1% and the balance of Zn and impurities with the total amount not more than 0.35%, casting to form copper ingots, extruding to form copper tube billets, stretching, annealing, inspecting the finished copper tubes and putting the finished copper tubes into a warehouse.

Description

technical field [0001] The invention relates to the field of copper alloys used in the bathroom and kitchen industry, in particular to a preparation method of a dezincification-resistant lead-free low-silicon-arsenic brass tube. Background technique [0002] Lead-free brass is a new type of brass alloy material that is preferred to be promoted and used in the bathroom and kitchen industry. It 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 pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22C1/03C22C1/06B21C23/08
CPCB21C23/085C22C1/03C22C1/06C22C9/04
Inventor 彭秀华陈永禄蔡文伟廖春荣王秋燕蔡新疆
Owner 龙岩市鸿航金属科技有限公司
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