Trailing to protect concrete materials against oxidation

Tool designed to protect materials reactive at high temperatures from oxidation when processed by DED (Direct Energy Deposition) AM technologies, either by laser or arc in an open environment. In these cases, the workpiece needs to be isolated, or at least isolate the area subject to temperatures above the oxidising temperature of the material itself, from the air. Examples of materials reactive at high temperatures are titanium and its alloys, some aluminium alloys, steel alloys, etc. which can see their properties impaired when oxygen from the air is incorporated. 
A solution sometimes used, is a closed chamber from which air is extracted and then filled in with an inert gas, where the workpiece will be manufactured or repaired. However, this limits the size of the workpiece and the complexity of manufacturing, considerably increasing the amount of inert gas to be used. 

Trailing is solidly attached to the welding torch or laser head in such a way that it covers an equal extension in all directions regardless of the part size. In addition, it includes a micropyrometer that measures the temperature of the hottest area to determine the moment when protection can stop and continue production in other areas.