Stripable paint for laser impact treatment

A laser shock and coating technology, applied in the coating and other directions, can solve the problems of easy peeling of the coating, affecting the laser processing effect, metal surface ablation, etc., to achieve the effects of low cost, improved laser shock effect, and convenient spraying

Inactive Publication Date: 2009-01-07
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] There are no reports of energy-absorbing coatings for laser shock treatment in domestic and foreign literature and patents that can be consulted at present. Other protective coatings such as the Chinese patent strippable protective coating (02137364.7) cannot withstand high-power repetition rate lasers. Continuous impact, the coating is easy to peel off during the impact process, so the metal surface is easy to be ablated in the subsequent processing, which affects the laser processing effect

Method used

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  • Stripable paint for laser impact treatment
  • Stripable paint for laser impact treatment
  • Stripable paint for laser impact treatment

Examples

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example 1

[0031] [Example 1] The proportioning of the components of the coating is fine particle carbon powder 10%, binding agent A55%, wherein water, polyvinyl alcohol, silicone oil, ethyl silicate, silicone resin and additive weight composition ratio 6:1:1:2:2:1, special self-drying thinner 32%, component weight ratio 2:2:3:1:1, additive 3%, of which self-carbon black is used as a reinforcing agent, 928 Tempered paint stabilizer, dolomite attapulgite as filler, calcium naphthenate as drier, water-based paint defoamer, the weight ratio of the components is 1:1:4:1:1, and the coating thickness is 100 μm. Its drying speed is 12 minutes at room temperature, and the laser power is 2.67GW / cm 2 The schematic diagram of the surface of the sheet after laser shock is shown in Figure-1. The laser passes through the constrained layer of water and acts on the coating of the energy absorbing layer. A high-pressure shock wave propagating to the metal sheet is generated, causing the sheet to deform...

example 2

[0032] [Example 2] The proportioning of the component of the coating is fine particle carbon powder 10%, binding agent B65%, wherein water, polyvinyl alcohol, formaldehyde, sodium hydroxide, magnesium chloride, borax and additive weight composition ratio are 5: 2:1:1:1:2:1, special self-drying thinner 23%, solvent weight ratio 2:2:3:1:1, additive 2%, of which white carbon black is used as a reinforcing agent, 928 tempered paint Stabilizer, dolomite attapulgite clay as filler, calcium naphthenate as drier, water-based paint defoamer, the weight ratio of the components is 2:1:4:2:1, and the coating thickness is 100 μm. Its drying speed is 10 minutes at room temperature, and the laser power is 2.67GW / cm 2 , the schematic diagram of the sheet metal surface after laser shock is shown in Fig. As the thickness of the energy absorbing layer increases, the laser-induced shock wave pressure increases, and the deformation of the sheet metal also increases. However, when the thickness o...

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Abstract

This invention discloses a strippable coating for laser shock processing, which is composed of carbon powders 5-15 wt.%, bonding agent 50-70 wt.%, self-drying thinner 15-35 wt.% and additive 2-5 wt.%. The thickness of the coating layer is generally 60-150 mums. The strippable coating is manufactured by: (1) placing carbon powders in a reactor, and adding bonding agent, self-drying thinner and additive; and (2) stirring uniformly, and adjusting the pH value to 7.5 with 25% ammonia solution. The strippable coating can intimately adhere to the surface of metals, and cannot be stripped during continuous laser shock process, thus having a good shock effect.

Description

technical field [0001] The invention relates to the field of laser shock material processing application technology and polymer materials, in particular to an energy-absorbing layer coating for laser shock treatment, which is suitable for continuous impact strengthening, modification or modification of material surfaces by using the mechanical effect of laser shock waves. Impact forming of sheet metal. Background technique [0002] Laser Shock Technology (LSP) is a promising processing method based on the interaction of shock waves induced by high-energy short-pulse lasers with metallic materials. This technology has been widely used in mechanical engineering, aerospace, automobile industry, shipbuilding industry, nuclear industry, medical engineering, bioengineering, microelectronics, military and other industries. At present, this technology is mainly used for material modification. Impact forming, and non-destructive testing, etc. [0003] When studying laser shock, a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/00C09D5/20
Inventor 任旭东张永康殷苏民周建忠张凌峰
Owner JIANGSU UNIV
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