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copper backing

copper backing

copper backing

Can anyone offer a backing material other than copper that they have had goog results with please? I work in an aerospace company that has a new Mits co2 vz1 laser. I am currently using copper as a backing but having some problems with reflection. Thanks in advance.

RE: copper backing


I don't know much about laser welding and cutting, but "big" lasers are sommething I know about.  I assume you are asking about a backup plate for a weld. We always used a piece of graphite for beam dumps for Multi-kilowatt class lasers.  Little reflection off the surface and the surface slowely ablates when hit with a high power beam.  A material called Grafoil works especially good.  It is a sheet material made for vacuum (radiant) insulation.  It has good heat transfer laterally, but poor thru the sheet.  I had a real thin piece mounted on the wall opposite the aperature of a highly collimated 6kW laser and it only got hot. Never burned a hole in it.


RE: copper backing

Sorry for the delay. Thanks for your input. The application is cutting and we cannot have any graphite in contact with the part which is made of hast-x. The problem is possible contamination and crack problems with engine heat.

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