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Corrosion-resistant brass material and preparation method thereof

A corrosion-resistant, brass technology, applied in the field of material anti-corrosion technology and metal smelting, can solve the problems of severe toxicity, health damage, etc., and achieve the effect of good corrosion resistance and comprehensive mechanical properties

Inactive Publication Date: 2016-08-17
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, As is the most widely used element, but As is highly toxic, and its volatilization during production and use will cause harm to human health, so it should be avoided as much as possible in the future

Method used

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  • Corrosion-resistant brass material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The composition weight ratio (wt%) of the embodiment material of the present invention is: 62% Cu, all the other are Zn and unavoidable impurity, lanthanum oxide (La 2 o 3 ) processing capacity is 0.2%.

[0019] Take the following steps to make:

[0020] (1) Copper powder and La 2 o 3 Mix evenly according to the mass ratio of 1:1, and then press it into a block with a hydraulic press, the pressure used is 50MPa, and the pressure holding time is 1 minute;

[0021] (2) Put the copper block into the graphite crucible, heat and melt it with a medium-frequency induction furnace, add broken glass as a covering agent before the copper is about to melt, heat up to melt and overheat to 1150 ℃, add the preheated zinc block, and stir with a carbon rod Let the zinc melt completely;

[0022] (3) Continue to raise the temperature of the alloy liquid to 1330°C, add the mixture of massive lanthanum oxide and copper powder, stir with a carbon rod, and let it stand for 10 minutes. T...

Embodiment 2

[0024] The composition weight ratio (wt%) of the material of the embodiment of the present invention is: 62% Cu, the rest is Zn and unavoidable impurities. Lanthanum oxide (La 2 o 3 ) processing capacity is 0.8%.

[0025] Take the following steps to make:

[0026] (1) Copper powder and La 2 o 3 Mix evenly according to the mass ratio of 1:1, and then press it into a block with a hydraulic press, the pressure used is 60MPa, and the holding time is 3 minutes;

[0027] (2) Put the copper block into the graphite crucible, heat and melt it with a medium-frequency induction furnace, add broken glass as a covering agent before the copper is melted, heat up to melt and overheat to 1170°C, add the preheated zinc block, and stir with a carbon rod Let the zinc melt completely;

[0028] (3) Continue to raise the temperature of the alloy liquid to 1370°C, add the mixture of massive lanthanum oxide and copper powder, stir with a carbon rod, and let it stand for 8 minutes. The alloy liq...

Embodiment 3

[0030] The composition weight ratio (wt%) of the embodiment material of the present invention is: 62% Cu, all the other are Zn and unavoidable impurity, lanthanum oxide (La 2 o 3 ) processing capacity is 1.4%.

[0031] Take the following steps to make:

[0032] (1) Copper powder and La 2 o 3 Mix evenly according to the mass ratio of 1:1, and then press it into a block with a hydraulic press, the pressure used is 70MPa, and the pressure holding time is 5 minutes;

[0033] (2) Put the copper block into the graphite crucible, heat and melt it with a medium-frequency induction furnace, add broken glass as a covering agent before the copper is about to melt, raise the temperature to melt and overheat to 1180°C, add the preheated zinc block, and stir with a carbon rod Let the zinc melt completely;

[0034] (3) Continue to raise the temperature of the alloy liquid to 1380°C, add the mixture of massive lanthanum oxide and copper powder, stir with a carbon rod, and let it stand fo...

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Abstract

The invention relates to a corrosion-resistant brass material and a preparation method thereof. The alloy material comprises the following components in percentage by weight: 55-74% of copper (Cu) and the balance of zinc (Zn) and not more than 0.5% of unavoidable impurities. The application amount of lanthanum oxide (La2O3) is 0.2-1.5%. The brass material is processed by virtue of La2O3, so that the microstructures of the alloy are obviously changed and purified and thus the corrosion resistance and plasticity of the alloy material are improved, the yield strength of the alloy material is reduced, the alloy material has good comprehensive mechanical performances and is suitable for manufacturing sanitary ware, plumbing devices and materials, instrument condenser pipes, valves and the like having corrosion-resistant requirement. Compared with pure elemental rare earth, rare earth oxides are easily available and inexpensive and high in utilization rate of rare earth.

Description

technical field [0001] The invention relates to a process method for improving the corrosion resistance of common brass materials by using lanthanum oxide treatment, and belongs to the fields of material anticorrosion technology and metal smelting technology. Background technique [0002] Brass has excellent mechanical properties, corrosion resistance, electrical and thermal conductivity, and processing technology, so it is widely used to manufacture sanitary ware, plumbing equipment, instruments and meters, and hydraulic valves. However, during the use of brass, there is a problem of dezincification corrosion, that is, the zinc element is preferentially corroded and falls off, leaving a loose porous structure, which seriously reduces the mechanical properties of brass, shortens the service life, and also brings safety hazards. In order to suppress the dezincification corrosion of brass over the years, researchers have taken various measures, among which adding alloying elem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/02
Inventor 耿浩然罗宏贾鹏
Owner UNIV OF JINAN
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