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Nanometer metal pipe and nanometer preparation method thereof

A metal tube and nanotechnology technology, which is applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problem that the material cannot be uniformly nanosized and repeatable, the inner surface of the metal pipe is not suitable for nanometering, and special specifications cannot be prepared. products, etc., to achieve strong adaptability, uniform and stable nano-layers, and achieve large-scale effects.

Inactive Publication Date: 2008-11-26
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the surface nanonization described by these phenomena is unstable and cannot guarantee uniform nanonization and reproducibility of materials.
Products with special specifications cannot be prepared, and it is not suitable for large-scale and large-scale continuous production
[0010] Based on the above analysis, the above technologies are not suitable for the nanometerization of the inner surface of metal tubes.

Method used

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  • Nanometer metal pipe and nanometer preparation method thereof

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Embodiment 1

[0067] The inner diameter of the aluminum tube is 15mm, the outer diameter is 25mm, the length of the metal tube is 1.0m, and the metal tube is placed horizontally. The number is 10r / min, and the surface is nano-sized after 15min. The XRD analysis shows that the inner wall of the aluminum tube has been nanosized, and the size of the nanocrystals is about 15nm. The nanonization depth is 50 μm.

Embodiment 2

[0069] The inner diameter of the magnesium-aluminum alloy tube is 30mm, the outer diameter is 40mm, the length of the metal tube is 200mm, and the metal tube is placed horizontally. The speed is 12r / min, and the surface is nano-sized after 25min. The XRD analysis shows that the inner wall of the magnesium-aluminum alloy tube has been nano-sized, and the size of the nano-crystal is about 10nm. The nanometerization depth is 40 μm.

Embodiment 3

[0071] The inner diameter of the copper tube is 40mm, the outer diameter is 55mm, the length of the tube is 3.0m, the metal tube is placed horizontally, the diameter of the ceramic ball is 8mm, and the number of the ball is 1 / 3 of the inner volume of the tube. The oscillation frequency is 100Hz, the amplitude is 50mm, the rotation speed of the aluminum tube is 25r / min, and the surface is nano-treated for 30min. The XRD analysis shows that the inner wall of the copper tube has been nano-sized, and the size of the nano-crystal is about 40nm. The nanometerization depth is 40 μm.

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Abstract

The invention discloses a nano-crystallization metal tube, an inner surface nano-crystallization method of the metal tube and a device applied to the method. The inner surface of the nano-crystallization metal tube is provided with nano-crystallization grains the size of which is below 100nm. The inner surface nano-crystallization method of the metal tube comprises: a hard ball pill is arranged in the metal tube; the metal tube is fixed on an oscillator the frequency and the amplitude of which can be adjusted; driven by the oscillator, the metal tube synchronously oscillates and the hard ball pill throbs at high speed and high frequency to collide with the inner wall of the metal tube; the oscillating frequency and the amplitude are determined according to the inner diameter of the metal tube and the size of the ball pill, so the kinetic energy of the ball pill is between the plastic deformation intensity and the tensile intensity of the inner surface of the metal tube to lead to the nano-crystallization surface of the metal tube; when the oscillation is treated, the metal tube is driven by a motor to rotate and cause oscillating points to cover the entire surface in the metal tube. The nano-crystallization device comprises a metal tube and a ball pill oscillation system, a hard ball pill conveying system and a metal tube rotational system.

Description

technical field [0001] The invention relates to a nanometerization method for the inner surface of a metal pipe, in particular to a method for realizing nanometerization of the inner surface structure of the metal pipe by an oscillation impact method and the nanometerization metal pipe. Background technique [0002] Due to the small grain size (usually less than 100nm in at least one dimension), high interface density and large volume fraction, nano-metallic materials exhibit unique mechanical and physical and chemical properties. A large number of experimental results show that the performance and mechanical behavior of nano-metal materials are significantly different from traditional coarse-grained materials, and are usually better than coarse-grained materials. For nano-metal materials, the strength, hardness and toughness are significantly improved compared with coarse-grained materials, but the plasticity is significantly reduced. The failure of metal materials mostly ...

Claims

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Application Information

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IPC IPC(8): F16L9/02C21D7/06
Inventor 张俊宝梁永立宋洪伟杨晓萍
Owner BAOSHAN IRON & STEEL CO LTD
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