Preparing method for anti-dezincification leadless bismuth arsenic extruded brass rod

A zinc-lead-free bismuth and brass rod technology is applied in the field of preparation of dezincification-resistant lead-free bismuth-arsenic extruded solid brass rods, which can solve the problems of weakening the anti-dezincification corrosion resistance of duplex brass, and improve the anti-dezincification resistance. Dezincification corrosion performance, improvement of melt fluidity, effect of suppressing floating

Active Publication Date: 2018-03-16
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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  • Preparing method for anti-dezincification leadless bismuth arsenic extruded brass rod
  • Preparing method for anti-dezincification leadless bismuth arsenic extruded brass rod
  • Preparing method for anti-dezincification leadless bismuth arsenic extruded brass rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A dezincification-resistant lead-free bismuth-arsenic brass, consisting of the following raw materials in mass percent: Cu61%, Bi0.5%, As0.07%, Al0.5%, Sn0.08%, Pb0.06%, Zn37 .75% and a total of 0.04% impurities.

[0028] The preparation method of the above-mentioned dezincification-resistant lead-free bismuth-arsenic extruded solid brass rod includes the step of casting and extruding the above-mentioned molten brass into a solid brass rod. Steps include:

[0029] 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;

[0030] 2) Add the red copper plate required for the batching of the furnace. The red copper plate is standard cathod...

Embodiment 2

[0044] A dezincification-resistant lead-free bismuth-arsenic brass, consisting of the following raw materials in mass percent: Cu62%, Bi0.7%, As0.1%, Al0.7%, Sn0.15%, Pb0.09%, Zn36 .12% and total 0.14% impurities.

[0045] The preparation method of the above-mentioned dezincification-resistant lead-free bismuth-arsenic extruded solid brass rod includes the step of casting and extruding the above-mentioned molten brass into a solid brass rod. Steps include:

[0046] 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;

[0047] 2) Add the red copper plate required for the furnace ingredients. The red copper plate is standard cathode c...

Embodiment 3

[0057] A dezincification-resistant lead-free bismuth-arsenic brass, consisting of the following raw materials in mass percent: Cu63%, Bi0.9%, As0.12%, Al0.8%, Sn0.24%, Pb0.02%, Zn34 .84% and a total of 0.08% impurities.

[0058] The preparation method of the above-mentioned dezincification-resistant lead-free bismuth-arsenic extruded solid brass rod includes the step of casting and extruding the above-mentioned molten brass into a solid brass rod. Steps include:

[0059] 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;

[0060] 2) Add the red copper plate required for the batching of the furnace. The red copper plate is standard cathode...

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Abstract

The invention relates to the field of copper alloys for the bathroom and kitchen industry and provides a preparing method for an anti-dezincification leadless bismuth arsenic extruded brass rod. The preparing method comprises the step of smelting 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, smaller than 0.1% of Pb, the balance Zn and smaller than or equal to 0.25% of impurities to obtain the solid brass rod by the processes of lead casting and extruding.

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 bismuth-arsenic extruded solid brass rod. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22C1/03C22C1/06B22D11/16
CPCB22D11/004B22D11/16C22C1/03C22C1/06C22C9/04
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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