thermal return of a welded seam made of steel after argon-arc welding with a non-consumable electrode

after arc argon argon-arc artisan assembly construction consumable diesel electric electrode energy engineer engineering fire flexible gas heat heating heavy helmet high hot incandescent iron kerma leave made maintenance man manual manufacturing mats melting metal non non-consumable oil pipe plan process processing rear red refining return seam silhouette smoke sparks steel technical technology thermal treatment using weld welded welder welding worker