Laser surface treatment

Consulting, design and system integration for optical component assemblies for pulsed laser material processing

 

Optische Baugruppen im Laserstrahlengang, Bild: LZH

The Laser Zentrum Hannover e.V. offers consulting, design and system integration for optical component assemblies for laser material processing. These can be customized for your application and integrated in your system.

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Development of processing systems and system components

 

The Machines and Controls Group designs, constructs and makes processing systems and system components, mainly for deposition welding and surface technology. This also includes the necessary process development. From the idea to realization to implementation of the process system, the LZH experts accompany their customers through the whole development process.

 

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Functionalization and structuring of surfaces

 

The LZH offers consulting, feasibility studies and process development for the functionalization and structuring of surfaces. Here, ultrashort pulse lasers offer manifold possibilities to modify surface properties in a well-targeted manner to match the requirements of diverse applications. One example is the generation of hydrophobic surfraces.

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Laser alloying

 

Using laser alloying, wear-resistant coatings can be placed on different materials. For example, materials with a high carbon affinity can be embedded in the surface of a basis material. These embedded materials react with the carbon in the basis material, forming wear-resistant carbides.

In this way, the lifetime of tools can be prolonged.
 

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Laser-assisted GMA cladding (deposition welding)

 

Schichtauftrag auf eine Extruderwelle. Bild: LZH

During laser-assisted arc deposition welding, the laser beam stabilizes and guides the electrical arc. Thus, low dilution rates (<5%) and a precise positioning of the deposition material can be achieved.

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Laser cladding (laser deposition welding) 

 

Hilfe im Zulassungsdschungel

With the application of material by laser cladding, components can both be protected from wear or repaired.

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Laser dispersion

 

Optische Baugruppen im Laserstrahlengang, Bild: LZH

Using laser dispersion, metal-ceramic coatings can, for example, be added to moulding tools. These coating improve both the wear and corrosion characteristics of the tools, and can thus increase tool life.

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Laser surface structuring for better adherence

 

Laser radiation can be used to roughen surfaces and thus improve the adherence characteristics of machine parts.

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 Microstructuring of biomedical implantate with an fs-Laser

 

Spiralschnitt in Metalllegierung. Bild: LZH

With short pulse lasers, the LZH can process almost all materials precisely in the micrometer range. With this laser, implants can be cut, drilled, selectively removed or structured with only little damage.

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Process development for laser micro processing

 

Lasergenerierter Dünnfilmsensor auf einer Werkstückoberfläche. Bild: LZH

The LZH is examining whether laser-based processes can be used for microprocessing. Suitable processes can be optimized up to use in industry. Mainly ultrashort pulse lasers are used for this application.

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Process monitoring and documentation

 

Simulation zu Prozessemissionen (Schweißspritzer). Bild: LZH

The LZH develops individual strategies for monitoring laser processes. Together with the customers, these strategies are transferred into technical systems and tested in industrial environments. Furthermore, the LZH offers consulting for process optimization.

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Surface functionalization for biomedical and technical applications

 

The Industrial and Biomedical Optics Department offers the specific modification of surfaces of the most diverse materials in order to impart the desired properties for various biomedical and technical applications:

  • Wettability with liquids
  • Light absorption
  • Tribological properties
  • Biocompatibility

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Thin-film structuring for electric and non-electric functional parts

 

Dünnschicht-Dehnungssensor in einer V-Nut eines Maschinenbauteils

The LZH offers consulting, feasibility studies and process development for the laser structuring of thin films. With this process, surfaces can be equipped with strain sensors for example. Thin-film sensor technology is a field of application for this technology.

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