The Beamalloy electron beam welding process does not add metal to the weld joint. Therefore, the joint must be cut square with little or no surface chamfer so as to provide the metal for the weld. For a tubular weldment with an alignment shoulder, the inside radius of the male part must be smaller than the corresponding inside radius of the female part, so that these radii do not interfere to hold the corresponding weld surfaces apart.
In general, the two parts of the weldment must be a slip fit, so that Beamalloy can clean and prepare the weldment for welding, as well as test for proper fit. In cases where disassembly by Beamalloy is not practical, the customer must adhere to the proper cleaning and assembly methods.
A machined surface finish of 63 for the weld surfaces is acceptable in most cases.
During the machining operations, especially when making the finished cuts, avoid chlorinated or sulfur bearing cutting fluids.
The weld area must be clean of all oxide scale, tarnish, lubricants, and all other foreign matter. Beamalloy has ultrasonic cleaning equipment used for cleaning parts. Final cleaning is typically done with MEK. Do not use chlorinated or sulfur bearing solvents.
Silicon carbide abrasives are acceptable. Do not use abrasives with aluminum oxide.
There are wide variations in the different types of weldments for electron beam welding. Email your proposed assembly drawings: firstname.lastname@example.org. We will gladly assist you in optimizing your weldment for electron beam welding.