METHOD electron beam welding thin-walled tubes with thin-walled bimetallic adapters

摘要

1. A method of electron beam welding of thin-walled thin-walled bimetallic pipes with an adapter consisting in that the welded pipe ends and the adapter was treated under welding treated spliced ​​ends and welded using electron beam path semiellipse oscillations, which is arranged along the longitudinal axis of the joint, wherein in that before welding weldable thin-walled tube end to distribute a cone size of not more than 14 °, and operate at its end a centering annular projection and welded conc bimetallic adapter when machining diffusion welded workpiece impart a similar tapered shape, and at its end is performed centering the annular groove under the annular projection on the tube end, then on the welded pipe ends and the adapter wear collapsible shroud rings, departing from the ends not more than 5 mm, ends of the joint and are welded by electron beam, the diameter of the heating spot size is set not more than 0.5 welded wall thickness, and the welding speed is not more than 20 m / h, and the heating element stain ktronnogo beam is swayed at a frequency less than 50 cycles per second symmetrical joint line, and the length of the minor axis of the semi-ellipse operate not larger than the thickness of the welded stenki.2. A method of electron beam welding according to claim 1, characterized in that the point of change of direction movement of the spot of heating along the path toward a semiellipse indigestion styka.3 edges. A method of electron beam welding according to claim 1, characterized in that after welding the weld is cooled in shroud rings to a temperature below 100 ° C.