Brass alloy and preparation method thereof

A brass alloy and a technology for preparation steps, applied in the field of copper alloys, can solve problems such as poor welding performance, inability to apply, and lead cannot be implemented on a large scale, and achieve the effects of excellent polishing performance, improved cutting performance, and obvious market competitive advantages.

Active Publication Date: 2022-05-27
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the valve, plumbing and sanitary ware industry, bismuth brass is prone to defects during thermal processing, difficult to recycle and reuse corner materials, and poor welding performance. Substituting bismuth for lead cannot be implemented on a large scale.
Antimony brass is also toxic due to antimony itself. The precipitation test of its valves and faucets cannot meet the requirements of 0.6μg / L as stipulated in the NSF61 standard. It also has hidden dangers to human health, so it cannot be used in valves and plumbing. Bathroom industry

Method used

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  • Brass alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The brass alloy has a composition of 61.5wt% Cu, 0.3wt% Si, 0.6wt% Sn, 0.1wt% Pb, 0.1wt% Al, 0.1wt% As, and the balance is Zn.

[0029] The preparation steps of this brass alloy are as follows:

[0030] 1) Ingredients: Weigh Cu, Si, Sn, Pb, Al, Zn, copper-arsenic master alloy, and aluminum rare earth, wherein the copper content of the copper-arsenic master alloy is 70 wt%, and the aluminum content of aluminum rare earth is 90 wt%.

[0031] 2) Smelting: Add Cu, Si and Sn into a power frequency smelting furnace with a voltage of 380V, and perform stirring and melting. After melting, reduce the power of the smelting furnace to control the temperature at 1000-1050 ° C, and mix Pb, Al, Zn And the copper-arsenic alloy is added into the furnace to be melted, and after the above-mentioned materials are melted, they are stirred, and a brass slag cleaning agent is added, and the slag is removed by using a slag fishing tool.

[0032] 3) Composition test: Take samples in the coppe...

Embodiment 2

[0037] The brass alloy has a composition of 61.7wt% Cu, 0.35wt% Si, 0.7wt% Sn, 0.13wt% Pb, 0.1wt% Al, 0.12wt% As, and the balance is Zn.

[0038] The preparation steps of this brass alloy are as follows:

[0039] 1) Ingredients: Weigh Cu, Si, Sn, Pb, Al, Zn, copper-arsenic master alloy, and aluminum rare earth, wherein the copper content of the copper-arsenic master alloy is 70 wt%, and the aluminum content of aluminum rare earth is 90 wt%.

[0040]2) Smelting: Add Cu, Si and Sn into a power frequency smelting furnace with a voltage of 380V, and perform stirring and melting. After melting, reduce the power of the smelting furnace to control the temperature at 1000-1050 ° C, and mix Pb, Al, Zn And copper-arsenic alloy is added into the furnace for melting. After the above materials are melted, stirring is carried out and a brass slag cleaning agent is added, and the slag is removed by using a slag fishing tool.

[0041] 3) Composition test: Take samples in the copper water to ...

Embodiment 3

[0046] The brass alloy has a composition of 62.5wt% Cu, 0.2wt% Si, 0.6wt% Sn, 0.1wt% Pb, 0.1wt% Al, 0.1wt% As, and the balance is Zn.

[0047] The preparation steps of this brass alloy are as follows:

[0048] 1) Ingredients: Weigh Cu, Si, Sn, Pb, Al, Zn, copper-arsenic master alloy and aluminum rare earth, wherein the copper content of the copper-arsenic master alloy is 70wt%, and the aluminum content of aluminum rare earth is 90wt%.

[0049] 2) Smelting: Add Cu, Si and Sn into a power frequency smelting furnace with a voltage of 390V, and perform stirring and melting. After melting, reduce the power of the smelting furnace to control the temperature at 1000-1050 ° C, and mix Pb, Al, Zn And copper-arsenic alloy is added into the furnace for melting. After the above materials are melted, stirring is carried out and a brass slag cleaning agent is added, and the slag is removed by using a slag fishing tool.

[0050] 3) Composition test: Take samples in the copper water to detec...

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PUM

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Abstract

The invention discloses a brass alloy, which is characterized in that the brass alloy comprises the following components in percentage by mass: 59 to 63 weight percent of Cu, 0.2 to 0.8 weight percent of Si, 0.4 to 1.0 weight percent of Sn, 0.05 to 0.15 weight percent of Pb, 0.1 to 0.2 weight percent of Al, 0.02 to 0.15 weight percent of As and the balance of Zn and inevitable impurities. According to the alloy disclosed by the invention, 10-25% of beta phase is obtained by controlling the proportion of Cu and Si elements and adding Sn and As elements while the alloy meets the environmental protection requirement, so that the dezincification corrosion resistance test standard of less than 100 microns can be achieved, the failure of products in the valve and bathroom industry caused by dezincification is greatly reduced, and meanwhile, the problem that conventional dezincification-resistant alpha single-phase brass is difficult to process by hot forging is solved.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, and in particular relates to a brass alloy and a preparation method thereof. Background technique [0002] Brass alloy is the most widely used lead brass. Because lead is basically insoluble in copper-zinc alloy, it is usually distributed on the grain boundary as free particles, so the chips are easy to break during material turning and have a lubricating effect. , so that lead-containing brass has good cutting performance. However, with the development of society, it has been found that such materials will have a greater impact on human health during use, especially in the valve and plumbing and bathroom industries. Excessive lead content in water can cause damage to the brain center and nervous system. It can also affect the digestive system, blood system and immune system. Therefore, governments of various countries have successively issued relevant laws and regulations to strictly lim...

Claims

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Application Information

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IPC IPC(8): C22C9/04C22C1/03C22F1/08
CPCC22C9/04C22C1/03C22F1/08Y02P10/20
Inventor 王东舒孟洋欧阳好
Owner JINTIAN COPPER GROUP CORP NINGBO
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