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Leadfree high-strength and corrosion-resistance silicon brass alloy easy to be cut and preparation method and application

A technology of easy cutting and silicon brass, which is applied in the field of alloy materials, can solve the problems of alloy plasticity reduction and affecting cutting performance, etc., and achieve the effect of good casting performance, high yield rate and wide application prospect

Active Publication Date: 2016-01-27
SOUTH CHINA UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Correspondingly, for multi-component copper alloys, the necessary condition for the formation of γ phase is that the zinc equivalent of the alloy must be greater than 48wt%, but too high a zinc equivalent will lead to a decrease in the plasticity of the alloy and seriously affect its machinability

Method used

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  • Leadfree high-strength and corrosion-resistance silicon brass alloy easy to be cut and preparation method and application
  • Leadfree high-strength and corrosion-resistance silicon brass alloy easy to be cut and preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0033] (1) The content of Cu, Zn, Si, and Al alloy elements is designed to be 58wt% Cu, 40.2wt% Zn, 1.0%wt% Si and 0.8%wt% Al respectively, and the zinc equivalent of the alloy is calculated to be 48.7%; in addition, The contents of grain refiner B and Ti in the alloy are designed to be 0.005%wt%B and 0.03%wt%Ti respectively;

[0034] (2) First preheat the crucible to 400-500°C, then place the raw materials of red copper and copper-silicon intermediate alloy at the bottom of the crucible, and raise the temperature to 1050-1100°C until the red copper and copper-silicon intermediate alloy are completely melted and the composition is homogenized. When adding a small amount of borax on the surface of the melt as a covering agent;

[0035] (3) Lower the temperature to 400-700°C, and add aluminum ingots and zinc ingots in sequence;

[0036] (4) After the aluminum ingots and zinc ingots are completely melted, the temperature is raised to 1050-1100 ° C, and the graphite rod is fully ...

Embodiment 2

[0042] (1) The content of Cu, Zn, Si, and Al alloy elements is designed to be 58wt% Cu, 40.1wt% Zn, 0.6%wt% Si and 1.3%wt% Al respectively, and the zinc equivalent of the alloy is calculated to be 48.1%; in addition, The contents of grain refiner B and Ti in the alloy are designed to be 0.008%wt%B and 0.05%wt%Ti respectively;

[0043] (2) First preheat the crucible to 400-500°C, then place the raw materials of red copper and copper-silicon intermediate alloy at the bottom of the crucible, and raise the temperature to 1050-1100°C until the red copper and copper-silicon intermediate alloy are completely melted and the composition is homogenized. When adding a small amount of borax on the surface of the melt as a covering agent;

[0044] (3) Lower the temperature to 400-700°C, and add aluminum ingots and zinc ingots in sequence;

[0045] (4) After the aluminum ingots and zinc ingots are completely melted, the temperature is raised to 1050-1100 ° C, and the graphite rod is fully ...

Embodiment 3

[0051] (1) Design the content of Cu, Zn, Si, Al alloy elements to be 60wt% Cu, 38wt% Zn, 1.5%wt% Si and 0.5%wt% Al respectively, the zinc equivalent of the alloy is calculated to be 49.6%; In addition, the alloy The contents of grain refiner B and Ti in the medium are designed to be 0.008%wt%B and 0.05%wt%Ti respectively;

[0052] (2) First preheat the crucible to 400-500°C, then place the raw materials of red copper and copper-silicon intermediate alloy at the bottom of the crucible, and raise the temperature to 1050-1100°C until the red copper and copper-silicon intermediate alloy are completely melted and the composition is homogenized. When adding a small amount of borax on the surface of the melt as a covering agent;

[0053] (3) Lower the temperature to 400-700°C, and add aluminum ingots and zinc ingots in sequence;

[0054] (4) After the aluminum ingots and zinc ingots are completely melted, the temperature is raised to 1050-1100 ° C, and the graphite rod is fully stir...

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Abstract

The invention belongs to the technical field of alloy materials, and discloses a leadfree high-strength and corrosion-resistance silicon brass alloy easy to be cut and a preparation method and application. The alloy comprises the following components in percentage by mass: 56-60% of Cu, 38-42% of Zn, 0.003-0.01% of B, 0.03-0.06% of Ti, and 1.0-1.5% of Si and 0.5-0.9% of Al, or 0.5-0.8% of Si and 1-1.5% of Al; and the equivalent weight of zinc in all the components is within 48-50%. The contents of Si and Al elements are controlled, and B and Ti composite grain refiners are added to control the phase composition of the alloy and the distribution state thereof, so that the copper alloy with such excellent comprehensive performances as strength, machinability and dezincification resistance, high yield and low cost is obtained, the alloy can replace lead brass and bismuth brass for water heating, bathroom and various easy corrosion parts, and the alloy is excellent in promotion and application prospect.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a lead-free easy-cutting high-strength corrosion-resistant silicon brass alloy, a preparation method and application thereof. Background technique [0002] In order to reduce the harmful effect of lead in lead brass faucets, relevant researchers at home and abroad have systematically studied the corrosion mechanism of drinking water on brass and the effect of adding alloy elements on the corrosion resistance of brass, and have taken various measures. Such as adding tin, nickel and other alloying elements to improve the corrosion resistance of brass, or to remove soluble lead or inhibit the leaching of lead. However, since lead is an alloying element of this type of brass and always exists in brass, the above-mentioned method can only alleviate the toxic and side effects of lead to a certain extent, but cannot fundamentally eliminate the harm of lead. In view ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22C1/03
CPCC22C1/02C22C1/03C22C9/04
Inventor 杨超丁智丁言飞冯松展
Owner SOUTH CHINA UNIV OF TECH
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