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A kind of production method of anti-dezincification lead-free casting 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 weakening the anti-dezincification corrosion performance of dual-phase brass, and achieve the improvement of anti-dezincification corrosion performance, avoiding burning damage, and improving melting. The effect of body fluidity

Active Publication Date: 2020-11-20
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

However, when the lead content is reduced, the dezincification resistance of duplex brass will be weakened

Method used

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  • A kind of production method of anti-dezincification lead-free casting brass ingot
  • A kind of production method of anti-dezincification lead-free casting brass ingot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An anti-dezincification lead-free lead-cast brass ingot consists of the following raw materials in mass percentage: Cu61%, Bi0.5%, As0.07%, Al0.5%, Sn0.08%, Pb0.06%, Zn37.75% and total 0.04% impurities.

[0024] The production method of the above-mentioned anti-dezincification lead-free casting brass ingot includes the step of casting the above-mentioned brass liquid in the mass percentage into a brass ingot, and the step of casting the brass ingot includes:

[0025] 1) First add 150kg of pure copper rice into the cored power frequency furnace. The total amount of pure copper rice in the power frequency furnace is 7.5% of the total raw materials. When it is in a semi-molten state, press it into the preheated 0.08% tin ingot, 0.5% bismuth ingot and 0.5% aluminum ingot accounted for the total raw material, fully stirred and allowed to stand for 10 minutes;

[0026] 2) Add the red copper plate required for the batching of the furnace. The red copper plate is standard cath...

Embodiment 2

[0038] An anti-dezincification lead-free lead-cast brass ingot is composed of the following raw materials in mass percentage: Cu62%, Bi0.7%, As0.1%, Al0.7%, Sn0.15%, Pb0.09%, Zn36.12% and a total of 0.14% impurities.

[0039] The production method of the above-mentioned anti-dezincification lead-free casting brass ingot includes the step of casting the above-mentioned brass liquid in the mass percentage into a brass ingot, and the step of casting the brass ingot includes:

[0040] 1) First add 200kg of pure red copper rice into the cored power frequency furnace. The total amount of pure red copper rice in the power frequency furnace is 10% of the total raw materials. When it is in a semi-molten state, press it into the preheated 0.15% tin ingot, 0.7% bismuth ingot and 0.7% aluminum ingot accounted for the total raw material, fully stirred and allowed to stand for 10 minutes;

[0041] 2) Add the red copper plate required for the furnace ingredients. The red copper plate is sta...

Embodiment 3

[0050] An anti-dezincification lead-free lead-cast brass ingot consists of the following raw materials in mass percentage: Cu63%, Bi0.9%, As0.12%, Al0.8%, Sn0.24%, Pb0.02%, Zn34.84% and a total of 0.08% impurities.

[0051] The production method of the above-mentioned anti-dezincification lead-free casting brass ingot includes the step of casting the above-mentioned brass liquid in the mass percentage into a brass ingot, and the step of casting the brass ingot includes:

[0052] 1) First add 300kg of pure copper rice into the cored power frequency furnace. The total amount of pure copper rice in the power frequency furnace is 15% of the total raw materials. When it is in a semi-molten state, press it into the preheated 0.24% tin ingot, 0.9% bismuth ingot and 0.8% aluminum ingot accounted for the total raw material, fully stirred and allowed to stand for 10 minutes;

[0053] 2) Add the red copper plate required for the batching of the furnace. The red copper plate is standard ...

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Abstract

The invention relates to the field of copper alloys for kitchenware industries, and provides a production method of an anti-dezincification and unleaded lead-cast brass ingot which is good in anti-dezincification corrosion property, high in strength, and good in machining property. The production method comprises the steps that the following raw materials of, by mass, 61-63% of Cu, 0.5-0.9% of Bi,0.07-0.12% of As, 0.5-0.8% of Al, 0.08-0.24% of Sn, less than 0.1% of Pb and the balance Zn and impurities with the total amount being less than or equal to 0.25% are smelted, and then subjected to lead casting, and the brass ingot is prepared.

Description

technical field [0001] The invention relates to the field of copper alloys for bathroom and kitchen industry, in particular to a production method of anti-dezincification lead-free lead-cast brass ingots. Background technique [0002] Lead brass (common grade is HPb59-1) has become the first choice copper alloy material for bathroom and kitchen hardware because of its good casting molding, cutting, grinding and polishing and mechanical properties, and is widely used. The Zn content of this type of brass exceeds 36%, and it is prone to dezincification corrosion during use, especially in marine climate conditions, which directly affects the life of bathroom and kitchen hardware products. Australia has formulated AS2345-2006 "Dezincification resistance of copper alloys", which stipulates that the dezincification layer of brass castings shall not exceed 100μm. However, practice has proved that for general leaded brass (whether processed copper or cast copper), this requirement ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/00C22C9/04C22C1/03C22C1/06
CPCB22D11/004C22C1/03C22C1/06C22C9/04
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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