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Preparation method of high-C-content CNTs-ZA27 zinc-aluminum-based composite bar

A technology of cnts-za27 and composite rods, which is applied in the field of preparation of ZA27 composite rods, can solve the problems of insignificant improvement in strength and toughness, uneven dispersion of carbon nanotubes, and poor deformability, etc., to improve the degree of densification and compact structure , wear resistance and corrosion resistance improvement effect

Active Publication Date: 2020-12-04
XIANGTAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the non-uniform dispersion of carbon nanotubes in the carbon nanotube reinforced zinc-aluminum matrix composite material prepared by the existing method, and the structure damage causes the carbon nanotubes to To improve the strength and toughness of zinc-aluminum matrix composite materials, the improvement of strength and toughness is not obvious, and the deformability is poor, and a method for preparing CNTs-ZA27 zinc-aluminum matrix composite rods with high C content is provided

Method used

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  • Preparation method of high-C-content CNTs-ZA27 zinc-aluminum-based composite bar
  • Preparation method of high-C-content CNTs-ZA27 zinc-aluminum-based composite bar

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specific Embodiment approach 1

[0034] Specific implementation mode 1: This implementation mode is a preparation method of a high C content CNTs-ZA27 zinc-aluminum matrix composite rod, which is completed according to the following steps:

[0035] 1. Mix the mixture of zinc powder and aluminum powder and carbon nanotubes evenly to obtain mixed powder; add the grinding balls and mixed powder into the ball mill jar, and then seal the ball mill jar;

[0036] The mass fraction of carbon nanotubes in the mixed powder described in step 1 is 0.01% to 0.5%;

[0037] The mass ratio of the mixed powder described in step 1 to the grinding ball is 1:(5~15);

[0038] The mass fraction of aluminum powder in the mixture of zinc powder and aluminum powder described in step 1 is 25%~28%;

[0039] 2. High-speed and low-temperature ball milling:

[0040] Vacuumize the sealed ball mill tank, then inject liquid nitrogen or liquid argon into the ball mill tank with a vacuum degree of -0.07~-0.09MPa, and then perform ball millin...

specific Embodiment approach 2

[0057] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the particle size of zinc powder in the mixture of zinc powder and aluminum powder described in step 1 is 200 mesh to 500 mesh, and the particle diameter of aluminum powder is 200 mesh. Mesh ~ 500 mesh. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0058] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the grinding balls described in step 1 are cemented carbide balls. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a ZA27 composite bar, in particular to a preparation method of a high-C-content CNTs-ZA27 zinc-aluminum-based composite bar to solve the problems thatcarbon nano tubes in a carbon nano tube reinforced zinc-aluminum-based composite material prepared through an existing method are uneven in dispersing and structurally damaged, consequently the strength and toughness of the carbon nano tube reinforced zinc-aluminum-based composite material are improved not obviously, and deformation performance is poor. The method comprises the steps: 1, materialsare mixed; 2, low-temperature high-speed ball milling is conducted; 3, low-speed ball milling is conducted; 4, warm compaction is conducted; and 5, powder forging is conducted, and the high-C-contentCNTs-ZA27 zinc-aluminum-based composite bar with the diameter of 20 mm to 60 mm is obtained. The prepared high-C-content CNTs-ZA27 zinc-aluminum-based composite bar is compact in structure, and compared with conventional ZA27, abrasion resistance and corrosion resistance are greatly improved; and the high-C-content CNTs-ZA27 zinc-aluminum-based composite bar can be obtained.

Description

technical field [0001] The invention relates to a preparation method of ZA27 composite rod. Background technique [0002] In terms of mechanical properties, ZA27 alloy has the characteristics of light weight, high strength, high hardness, good friction and wear properties, good bearing capacity, good ductility, non-magnetism and no sparks during collision. From an economic point of view, the raw material cost of ZA27 is Inexpensive, simple molding process, low melting and processing costs. Substituting ZA27 alloy for traditional copper alloy bearing bushes, worm gears, sliders and other wear-resistant parts will produce good economic and social benefits. [0003] At present, the production process of ZA27 alloy rods is mainly ingot pouring and rolling deformation. The molten zinc-aluminum alloy is poured into the mold, and the solid ingot is obtained after cooling. After the surface oxide layer is removed, the rolling deformation is performed to obtain the zinc-aluminum all...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F3/10B22F3/17C22C49/06C22C101/10
CPCB22F9/04B22F3/10B22F3/17C22C49/06B22F2009/043B22F2003/175
Inventor 刘洋罗浩宇孙天友苗华磊朱戴博杨岳云王兴刘志伟李萌萌韩石磊
Owner XIANGTAN UNIV
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