Fiber lasers have become the tool of choice for fast, efficient and reliable processing across an extensive
range of applications. Metals to polymers, thick to thin, large to small, fiber lasers can do it all.
Laser cutting is a technology that uses a laser to vaporize materials, resulting in a cut edge. While typically used for industrial manufacturing applications, it is now used by schools, small businesses, architecture, and hobbyists. Laser cutting works by directing the output of a high-power laser most commonly through optics. The laser optics and CNC (computer numerical control) are used to direct the material or the laser beam generated. A commercial laser for cutting materials uses a motion control system to follow a CNC or G-code of the pattern to be cut onto the material. The focused laser beam is directed at the material, which then either melts, burns, vaporizes away, or is blown away by a jet of gas, leaving an edge with a high-quality surface finish.
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Laser welding is a welding technique used to join pieces of metal or thermoplastics through the use of a laser. The beam provides a concentrated heat source, allowing for narrow, deep welds and high welding rates. The process is frequently used in high volume applications using automation, as in the automotive industry. It is based on keyhole or penetration mode welding.
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Laser cleaning is the process of removing material from a solid (or occasionally liquid) surface by irradiating it with a laser beam. At low laser flux, the material is heated by the absorbed laser energy and evaporates or sublimates. At high laser flux, the material is typically converted to a plasma. Usually, laser ablation refers to removing material with a pulsed laser, but it is possible to ablate material with a continuous wave laser beam if the laser intensity is high enough. While relatively long laser pulses (e.g. nanosecond pulses) can heat and thermally alter or damage the processed material, ultrashort laser pulses (e.g. femtoseconds) cause only minimal material damage during processing due to the ultrashort light-matter interaction and are therefore also suitable for micromaterial processing.
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Laser cladding is a method of depositing material by which a powdered or wire feedstock material is melted and consolidated by use of a laser in order to coat part of a substrate or fabricate a near-net shape part (additive manufacturing technology) .
It is often used to improve mechanical properties or increase corrosion resistance, repair worn out parts,and fabricate metal matrix composites. Surface material may be laser cladded directly onto a highly stressed component, i.e. to make a self-lubricating surface. However, such a modification requires further industrialization of the cladding process to adapt it for efficient mass production. Further research on the detailed effects from surface topography, material composition of the laser cladded material and the composition of the additive package in the lubricants on the tribological properties and performance are preferably studied with tribometric testing.
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Laser drilling is the process of creating thru-holes, referred to as “popped” holes or “percussion drilled” holes, by repeatedly pulsing focused laser energy on a material. The diameter of these holes can be as small as 0.002” (~50 μm). If larger holes are required, the laser is moved around the circumference of the “popped” hole until the desired diameter is created; this technique is called “trepanning”.
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Laser brazing is a thermal joining process and has been used to join steel with aluminum. In laser brazing, a filler metal is placed at or between the faying surfaces of the metals to be joined and heat is applied using a laser beam to melt the filler material, but not the parent metals. The liquid filler metal flows and fills the close fitting gap between the faying surfaces by capillary action. The joint is developed as the filler metal cools down, solidifies, and creates a diffusion bond at its interfaces with the parent materials.
The melting point of the filler metal used in brazing is above 450°C, but below the melting points of the metals to be joined, and thus unlike the liquid-phase joining processes, the parent metals do not undergo melting. As a result, the problems associated with HAZ, metallurgical incompatibility, porosity, and residual stresses are much reduced in brazing.
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Selective laser melting (SLM) is one of many proprietary names for a metal additive manufacturing technology that uses a bed of powder with a source of heat to create metal parts. Also known as direct metal laser melting (DMLM), the ASTM standard term is powder bed fusion (PBF). PBF is a rapid prototyping, 3D printing, or additive manufacturing (AM) technique designed to use a high power-density laser to melt and fuse metallic powders together.
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