Am very confused in selecting the best laser drilling techniques to drill holes in high super alloys with best hole quality and minimum drilling time
Do you refere to piercing hole or treppaning hole?
Another important thing are the hole diameter and the hole depth.
Personally think the "best" method is laser microjet. This process can install both round and shaped holes into turbine hardware made from nickel based super alloys. The main advantage with this technology is it enables installing the holes after application of a ceramic thermal barrier coating to the parts. There are also other advantages relative to eliminating the risk of backwall strikes that you can get with conventional laser. Disadvantage is I am not sure there are many people out there with this capability.
Many thanks Daniel and Joseph for your answers.
Subject to the question of Daniel i want to proceed with aerospace components applications such as turbine blades where the hole size varies from 0.3-0.5 mm. And these holes can be achieved with both piercing and trepanning. But which drilling process is the best in terms of both drilling time and quality
Even if the diameter range may be normal in laser drilling, the problem is the depth of the hole, because is limited to a few mm.
The best laser technology to makes hole today is by using IPG fiber lasers.
If you want, you can analyze this web page:
http://www.ipgphotonics.com/en/applications/materials-processing/drilling
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