Use of active flux to TIG welding of metal part

摘要

The process for welding two metallic parts such as a radial arm (100) and an intermediate casing of a gas turbine engine, comprises positioning the metallic parts against one another in a welding position, locally applying a flow (50) of weld on a reinforcement zone of the parts, and performing a tungsten inert gas (60) welding on the surfaces of the parts using a welding torch. The parts are in surface contact with one another respectively according to their welding surfaces, and have the reinforcement zone along their welding surface. The welding torch functions with a constant power. The process for welding two metallic parts such as a radial arm (100) and an intermediate casing of a gas turbine engine, comprises positioning the metallic parts against one another in a welding position, locally applying a flow (50) of weld on a reinforcement zone of the parts, and performing a tungsten inert gas (60) welding on the surfaces of the parts using a welding torch. The parts are in surface contact with one another respectively according to their welding surfaces, and have the reinforcement zone along their welding surface. The welding torch functions with a constant power during the tungsten inert gas welding step, and is moved according to a first constant speed on a coated zone and according to a second constant speed on a zone devoid of weld flow. A mask is applied on the metallic part to allow the precise deposition of weld flow on the reinforcement zone. The welding torch is moved at a speed different from the first and second speeds on a transition zone between the coated zone and adjacent zone, where the transition zone is devoid of weld flow. The welded parts are mechanically stripped to eliminate the residual trace of the weld flow.