So far thick plates of mild steel cannot have been cut with conventional methods unless high power laser is used, but cutting thick plates with 2 kW laser has been developed recently. In fact 2 kW laser is becoming a very common laser power level. A cutting experiment using a spinning laser beam method, one of such methods, was conducted. As a result, the maximum cutting thickness was increased sharply, and the cutting speed and gas consumption were improved substantially, especially for stainless steel.

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