The calculating formulas of top and bottom pool-surface deformation in TIG full-penetrationweld pool is developed based on principles of fluid mechanics and variation calculus.
根据流体力学理论和变分法原理，推导出了熔透情况下TIG焊接熔池上表面和下表面变形的方程。
2
The weld can performed free of porosity for fullpenetrationweld when proper surface treatment processing prior to welding is employed.
采用合理的焊前表面处理工艺、全熔透焊接可获得无气孔的焊缝。
3
By comparing backgouging of plasma arc with carbon arc to the welded joint of 13-5 martensitic stainless steel, the backgouging of plasma arc is proved feasible for the fullpenetrationweld.