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Spherical brass alloy powder manufacture method

A brass alloy and manufacturing method technology, applied in the field of metal powder metallurgy, can solve problems such as difficulty in alloy composition control, and achieve the effects of clear principle, simple process method and good surface quality

Active Publication Date: 2015-04-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent proposes annealing and melting metals in vacuum or atmosphere, and it is difficult to control the composition of alloys containing Zn, a volatile element with high saturated vapor pressure.

Method used

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  • Spherical brass alloy powder manufacture method
  • Spherical brass alloy powder manufacture method
  • Spherical brass alloy powder manufacture method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put the mixed brass (Cu70Zn30, mass percent) alloy / graphene mixed powder into an alumina crucible, put the crucible into the non-heating zone of the annealing furnace, and evacuate to 6×10 -3 Pa, feed argon gas to a pressure of 0.22MPa, push the crucible with brass alloy / graphene powder into the heating zone at 1000°C, keep it warm for 3 minutes, then pull out the crucible with brass alloy / graphene powder The heating zone is cooled by water quenching.

[0027] The brass alloy / graphene mixed powder is soaked in water, and the brass alloy micron-spherical powder is obtained by ultrasonic cleaning. figure 1 This is the scanning electron micrograph of the appearance of the obtained brass alloy ball, and the size of the spherical particle is about 10-30um. According to the manufacturing method of metal spherical powder of the present invention, such as figure 1 As shown, it was confirmed that brass alloy microspheres could be obtained.

Embodiment 2

[0029] Put the mixed brass (Cu60Zn40, mass percent) alloy / nano-graphite mixed powder into the alumina crucible, put the crucible into the non-heating zone of the annealing furnace, and evacuate to 6×10 -3 Pa, feed argon gas to a pressure of 0.22MPa, push the crucible with brass alloy / graphene powder into the heating zone at 950°C, keep it warm for 5 minutes, then pull out the crucible with brass alloy / graphene powder The heating zone is air-cooled for rapid cooling.

[0030] The brass alloy / graphene mixed powder is soaked in water, and the brass alloy micron-spherical powder is obtained by ultrasonic cleaning. figure 2 For the obtained brass alloy Cu60Zn40 spherical powder X-ray diffraction, according to the manufacture method of metal spherical powder of the present invention, such as figure 2 As shown, it is confirmed that the brass alloy spherical powder can be obtained as α and β coexisting phases, and the equilibrium phase of copper-zinc alloy Figure 1 No macro-segre...

Embodiment 3

[0032] Put the mixed brass (Cu60Zn30Sn10, mass percent) alloy / graphite mixed powder into an alumina crucible, put the crucible into the non-heating zone of the annealing furnace, and evacuate to 6×10 -3 Pa, feed argon gas to a pressure of 0.1MPa, push the crucible with brass alloy / graphene powder into the heating zone at 950°C, keep it warm for 5 minutes, then pull out the crucible with brass alloy / graphene powder The heating zone is air-cooled.

[0033] The brass alloy / graphene mixed powder is soaked in water, and the brass alloy micron-spherical powder is obtained by ultrasonic cleaning. image 3 This is a scanning electron microscope photo of the appearance of the obtained brass alloy ball (Cu60Zn30Sn10, mass percent), the spherical particle size is about 20-30um. According to the manufacturing method of metal spherical powder of the present invention, such as image 3 As shown, it was confirmed that brass alloy microspheres could be obtained.

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Abstract

The invention discloses a spherical brass alloy powder manufacture method. The method is characterized by including 1, preparing brass alloy powder; 2, preparing evenly-mixed powder of brass alloy powder and carbon material powder or ceramic material powder; 3, performing high temperature treatment, melting the brass alloy, solidifying, obtaining metal spheres, and cooling rapidly; 4, separating the carbon material powder or ceramic material powder, and obtaining micron or nano brass alloy spherical powder. The temperature of high temperature treatment is equal to or higher than that of metal melting, preferably, the temperature of high temperature treatment ranges from 10 to 80 DEG C higher than that of the brass alloy melting point. According to the method, process is simple, cost is low, and the method is adaptive to large scale production; the brass alloy powder is free of macro segregation, the surface metal sense is strong, and application of metal three-dimensional printing, print painting decoration, spraying (brazing) welding metal powder and metal filters can be met.

Description

technical field [0001] The invention belongs to the field of metal powder metallurgy and relates to powder processing technology, in particular to a method for manufacturing brass alloy spherical powder. Background technique [0002] Brass alloy powder is commonly known as copper gold powder, also known as gold powder. Mainly used in the manufacture of flexible printing pigments (advanced pictorials, high-end packaging, cigarette casings, securities printing), metal filters, porous components, conduits, self-lubricating bearing bushes, corrosion-resistant parts of automobiles and ships, and friction materials, widely used in surface decoration and modification , printing, medical equipment, mechanical engineering, powder metallurgy and other industries. At present, the research and manufacture of irregular brass alloy powders are relatively mature, especially the scaly brass alloy powders used in metallic pigments. High-quality and high-quality spherical brass alloy powder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 唐少龙雷成龙程振之黄海富都有为
Owner NANJING UNIV
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