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A high-strength, high-toughness, corrosion-resistant, lead-free, arsenic-free brass alloy and preparation method thereof

A brass alloy, high-strength and high-toughness technology, applied in the field of non-ferrous metals, can solve the problems of lead damage to the brain center, shock, high price, etc., achieve good corrosion resistance, good forming effect, and increase the strength

Active Publication Date: 2022-03-22
SHENZHEN RES INST OF XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Brass alloy has excellent corrosion resistance, electrical conductivity, thermal conductivity and processing performance, and is widely used in chemical industry, instrumentation, electrical engineering, shipbuilding and other industrial sectors, but with the continuous development of science and technology and people's requirements for quality of life Continuous improvement, the traditional brass alloy is difficult to meet the demand due to its lack of performance
Although people can improve the mechanical properties and cutting performance of brass by adding lead, and improve its corrosion resistance by adding arsenic, both elements are extremely harmful to the human body and the environment.
Lead can damage the brain center, affect the formation of hemoglobin, and cause anemia; arsenic can cause liver damage, and in severe cases, shock, and even death from toxic myocardial damage, and its price is relatively expensive
At present, civil water supply pipes are generally made of lead brass (the main models are C84400 and C83600). During the water supply process, some lead will be dissolved in water. When the concentration reaches 50mg / L or more, it will be harmful to the health of the human body. Health; arsenic brass can effectively inhibit the dezincification corrosion of brass, and can effectively improve the corrosion resistance of brass. It is mainly used in the marine field, because arsenic will dissolve in water and pollute the environment.

Method used

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  • A high-strength, high-toughness, corrosion-resistant, lead-free, arsenic-free brass alloy and preparation method thereof
  • A high-strength, high-toughness, corrosion-resistant, lead-free, arsenic-free brass alloy and preparation method thereof
  • A high-strength, high-toughness, corrosion-resistant, lead-free, arsenic-free brass alloy and preparation method thereof

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preparation example Construction

[0044] The present invention provides a method for preparing the lead-free and arsenic-free brass alloy described in the above scheme, comprising the following steps:

[0045] Melting the metal raw material composed of the lead-free and arsenic-free brass alloy corresponding to the above scheme to obtain an ingot;

[0046] The ingot is subjected to first heat treatment, rolling and second heat treatment in sequence to obtain a lead-free, arsenic-free brass alloy with high strength, high toughness and corrosion resistance;

[0047] The temperature of the first heat treatment is 850-950°C, and the time of heat treatment is 24-48 hours;

[0048] The temperature of the second heat treatment is 850° C., and the time is 10-60 minutes.

[0049] The present invention smelts the metal raw material composed of the lead-free and arsenic-free brass alloy corresponding to the above scheme to obtain an ingot. In the present invention, the metal raw material preferably includes elemental C...

Embodiment 1

[0059] High-strength, high-toughness, corrosion-resistant, lead-free, arsenic-free brass alloy material, its composition is: Cu 59%, Zn 33%, Al 5%, Fe 3%.

[0060] Cu and Zn used in smelting are pure metals, and Al and Fe are added in the form of Cu92Al5Fe3 alloy. The metal raw materials corresponding to the above components were smelted at 1200°C to obtain ingots (thickness: 14mm). The as-cast structure was mainly β phase and body-centered cubic FeAl phase; After the heat treatment, it is rolled into a sheet (1.5mm in thickness) at 850°C, and then subjected to a second heat treatment at 850°C for 30 minutes, and air-cooled to obtain a lead-free and arsenic-free brass alloy.

[0061] figure 1 It is the optical metallographic microstructure diagram of the ingot of embodiment 1; figure 2 It is the optical metallographic microstructure diagram of the lead-free and arsenic-free brass alloy prepared in Example 1. Depend on figure 1 and figure 2 It can be seen that both the a...

Embodiment 2

[0064] High-strength, high-toughness, corrosion-resistant, lead-free, arsenic-free brass alloy material, its composition is: Cu 60%, Zn 33%, Al 4%, Fe 3%.

[0065] Cu and Zn used in smelting are pure metals, and Al and Fe are added in the form of Cu93Al4Fe3 alloy. The metal raw materials corresponding to the above components were smelted at 1200°C to obtain ingots (thickness 14mm), the as-cast structure mainly consisted of β phase and body-centered cubic FeAl phase; After the heat treatment, it is rolled into a sheet (1.5 mm in thickness) at 800°C, and then heat-treated for 30 minutes at 850°C for a second time, and then lead-free and arsenic-free brass alloy is obtained after air cooling.

[0066] Figure 4 It is the optical metallographic microstructure diagram of the ingot of embodiment 2; Figure 5 It is the optical metallographic microstructure diagram of the lead-free and arsenic-free brass alloy prepared in Example 2. Depend on Figure 4 and Figure 5 It can be see...

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Abstract

The invention relates to the technical field of nonferrous metals, in particular to a high-strength, high-toughness, corrosion-resistant, lead-free, arsenic-free brass alloy and a preparation method thereof. The lead-free and arsenic-free brass alloy of the present invention comprises 59-70% of Cu, 20-33% of Zn, 4-5% of Al and 2-5% of Fe in terms of mass percentage, excluding As and Pb. The brass alloy of the invention is free of arsenic and lead, has high strength, high toughness and good corrosion resistance, and can replace lead brass and arsenic brass.

Description

technical field [0001] The invention relates to the technical field of nonferrous metals, in particular to a high-strength, high-toughness, corrosion-resistant, lead-free, arsenic-free brass alloy and a preparation method thereof. Background technique [0002] Brass alloy has excellent corrosion resistance, electrical conductivity, thermal conductivity and processing performance, and is widely used in chemical industry, instrumentation, electrical engineering, shipbuilding and other industrial sectors, but with the continuous development of science and technology and people's requirements for quality of life With continuous improvement, traditional brass alloys are difficult to meet the demand due to their lack of performance. Although people can improve the mechanical properties and cutting performance of brass by adding lead, and improve its corrosion resistance by adding arsenic, both elements are extremely harmful to the human body and the environment. Lead can damage t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/03C22F1/08
CPCC22C9/04C22C1/03C22F1/08
Inventor 杨水源郭利鹏庆鑫宇张锦彬黄艺雄
Owner SHENZHEN RES INST OF XIAMEN UNIV
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