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Metal mold for embossing superhydrophobic micro-nano surface and laser preparation method thereof

A micro-nano surface and metal mold technology, applied in laser welding equipment, metal processing equipment, nanotechnology, etc., to achieve high durability, wide practicability, and high efficiency

Active Publication Date: 2015-09-30
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The primary problem at present is how to prepare superhydrophobic surfaces in a large area, efficiently and at low cost, so that the excellent properties of superhydrophobic self-cleaning surfaces can be widely used.

Method used

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  • Metal mold for embossing superhydrophobic micro-nano surface and laser preparation method thereof
  • Metal mold for embossing superhydrophobic micro-nano surface and laser preparation method thereof
  • Metal mold for embossing superhydrophobic micro-nano surface and laser preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1. High-power picosecond laser preparation of mold steel molds for embossing superhydrophobic micro-nano surfaces

[0041] In this embodiment, a high-power picosecond laser is used to prepare an H13 hot work die steel mold for embossing a superhydrophobic micro-nano surface, including the following steps:

[0042] 1) Preparation of the metal base material: First, the surface of the H13 hot work die steel base material is ground flat by mechanical processing, then polished with a grinding and polishing machine, ultrasonically cleaned with alcohol, and dried for use;

[0043] 2) Laser treatment: using high-power picosecond laser, the laser wavelength is 1.06 micron near-infrared, the laser beam is Gaussian distribution, the pulse width is 15 picoseconds, the repetition frequency is 4M, and the average power is 100W. The laser energy density is 3.0J / cm 2 , with the X-Y scanning galvanometer, ablate the surface of H13 hot work die steel to form a symmetrical negati...

Embodiment 2

[0045] Example 2. High-power picosecond laser preparation of high-speed steel molds for embossing superhydrophobic micro-nano surfaces

[0046] In this embodiment, a high-power picosecond laser is used to prepare a mold steel mold for embossing a superhydrophobic micro-nano surface, including the following steps:

[0047] 1) Preparation of the metal base material: First, the surface of the high-speed steel base material is ground flat by mechanical processing, then polished with a grinding and polishing machine, ultrasonically cleaned with alcohol, and dried for use;

[0048] 2) Laser treatment: high-power picosecond laser, green light with a laser wavelength of 532nm, a Gaussian distribution of the laser beam, a pulse width of 3 picoseconds, a repetition rate of 100K, and an average power of 40W. Laser energy density 1.2J / cm 2 , cooperate with 3D scanning galvanometer to ablate the surface of high-speed steel to form a symmetrical negative structure of lotus leaf micro-nano ...

Embodiment 3

[0050] Example 3, High-power femtosecond laser preparation of cemented carbide molds for embossing superhydrophobic micro-nano surfaces

[0051] In this embodiment, a high-power femtosecond laser is used to prepare a cemented carbide mold for embossing a superhydrophobic micro-nano surface, including the following steps:

[0052] 1) Preparation of the metal base material: First, use mechanical processing to smooth the surface of the cemented carbide base material, then polish it with a grinding and polishing machine, perform ultrasonic cleaning with alcohol, and dry it for use;

[0053] 2) Laser treatment: high-power femtosecond laser is used, the laser wavelength is 1.06 micron near-infrared, the laser beam is Gaussian distribution, the pulse width is 100 femtoseconds, the repetition frequency is 1K, and the average power is 4W. Laser energy density of 1.5J / cm 2 , cooperate with the X-Y platform to move the laser beam to scan the cemented carbide substrate for ablation, form...

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Abstract

The invention discloses a metal die for coining a super-hydrophobic micro-nanometer surface and a laser manufacturing method thereof. The laser manufacturing method comprises the following steps that an ultra-short pulse laser is used for ablating a metal base material, a symmetrical negative structure of a lotus leaf micro-nanometer structure is obtained on the surface of the metal base material through laser ablating removing, and then the metal die is obtained; the symmetrical negative structure of the lotus leaf micro-nanometer structure is a micrometer-level pit and a nanometer-level substructure on the inner surface of the micrometer-level pit. The invention provides the micro-nanometer coining metal die for coining a non-metal material or a light-metal material so as to form the lotus leaf micro-nanometer structure with the surface being super hydrophobic and the laser manufacturing method of the metal die, and particularly relates to the micro-nanometer coining metal die which is manufactured efficiently in a large area by the utilization of high-power picosecond lasers and the manufacturing method of the metal die. The metal die for coining the super-hydrophobic micro-nanometer surface and the laser manufacturing method of the metal die have the comprehensive advantages that the manufacturing efficiency is high, the micro-nanometer coining die is high in temperature resistance, high in pressure resistance and wide in coning material range, the micro-nanometer structure is precise and adjustable in parameter and the lotus structure is vivid. Moreover, the manufacturing method is far superior than other methods.

Description

technical field [0001] The invention relates to a metal mold for embossing a super-hydrophobic micro-nano surface and a preparation method thereof, in particular to a metal mold for embossing a super-hydrophobic micro-nano surface and a laser preparation method thereof. Background technique [0002] The lotus leaf has the self-cleaning function of "leaving the sludge without staining", which is derived from the superhydrophobicity produced by the low free energy components on the surface of the lotus leaf and the unique micro-nano structure, that is, the contact angle between the surface and water exceeds 150°. In the 1970s, Professor Barthlott, a botanist at Bonn University in Germany, discovered that there are multiple micro- and nano-structures on the surface of lotus leaves, which consist of micro-nano protrusions with an average size of about 10 μm and nano-scale wax filaments with a diameter of 100-200 nm. , this structure transforms the surface contact between water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/362B82Y40/00
CPCB23K26/361B82Y40/00
Inventor 钟敏霖林澄张红军范培迅龙江游
Owner TSINGHUA UNIV
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