Moreover, the effect of the latter welding subsection's quenching arc region on decreasing residual stress of the prior welding subsection is better than the striking arc region.

This paper analyses the usage of LGK series of air plasma arc cutting machine, and enumerates the causes and solutions of striking arc, main circuit, gas path and cutting torch breakdown.

By a lot of experiment, the author claimed a soft arc striking technic which lead the arc ignition success rate to as high as above 90%.