Taking the welded rotor of steam turbine as the research object. a two-dimensional axisymmetric finite element model of multi-layer and multi-pass TIG are welding process was established. By using the double ellipsoidal heat source model. the element birth and death method and the Dflux heat source movement subroutine. https://www.roneverhart.com/Tzora-Feather-Ultra-Light-3-Wheel-Electric-Scooter-Only-41-lbs/