A production method of anti-dezincification lead-free low-silicon lead cast arsenic brass ingot

A production method and anti-dezincification technology are applied in the field of copper alloys used in the bathroom and kitchen industry, which can solve the problems of high cost, poor cutting performance, and low processing efficiency of silicon brass, save smelting time, improve strength and hardness, and facilitate the control effect

Active Publication Date: 2020-11-24
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 production method of anti-dezincification lead-free low-silicon lead cast arsenic brass ingot
  • A production method of anti-dezincification lead-free low-silicon lead cast arsenic brass ingot

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: An anti-dezincification lead-free low-silicon lead cast arsenic brass ingot consists of the following raw materials in mass percentage: Cu62%, Si0.6%, As0.07%, Al0.5%, Fe0.03 %, Pb0.06%, Zn36.7% and a total of 0.04% of impurities.

[0022] The production method of the above-mentioned anti-dezincification lead-free low-silicon lead cast arsenic brass ingot includes:

[0023] 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 smel...

Embodiment 2

[0033] An anti-dezincification lead-free low-silicon lead-cast arsenic brass ingot 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.

[0034] The production method of the above-mentioned anti-dezincification lead-free low-silicon-arsenic cast brass ingot 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...

Embodiment 3

[0044] An anti-dezincification lead-free low-silicon lead-cast arsenic brass ingot 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.

[0045] The preparation method of the production method of the above-mentioned anti-dezincification lead-free low-silicon-arsenic cast brass ingot includes:

[0046] 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; ...

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Abstract

The invention relates to the field of copper alloys used in the toilet and kitchen industry and provides a production method for dezincification-preventing lead-free low-silicon lead casting of an arsenic brass ingot. The production method is good in dezincification corrosion preventing performance, high in strength and good in machining performance. The production method includes the step for melting the raw materials including, by mass percent, 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, smaller than 0.1% of Pb and the balance Zn and impurities withthe total amount not larger than 0.35% and then forming the brass ingot in a lead casting manner.

Description

technical field [0001] The invention relates to the field of copper alloys used in the bathroom and kitchen industry, in particular to a production method of a dezincification-resistant lead-free low-silicon lead-cast arsenic brass ingot. 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 an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/00C22C9/10
CPCB22D11/004C22C9/10
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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