Electrical Motor Shaft Repair

[GusD]

We have always used hard-chrome to repair bearing journals on our electric motor shafts. Fifteen or twenty years ago we did experiment with spray welding, but the results were
disastrous in some cases,reason why we stayed with chrome ,unless the damage was greater han .020" in which case we fabricated a new shaft.
From time to time, the question comes up of why don't we use sub-merge arc welding or some other form of repair?
The reason we stayed with the chrome process was easy to explain.It was cost competitive and most important very reliable.I would appreciate any information in this matter

Thanbks a lot

GusD

 

[DougMSOE]

Flame spray is ok but depends very much on the metelurgy of the base material and the new material.
Chrome plating does not require the effort that flame spray does and may be put on different metals, even if a base plate is required.
Submerged arc is the best in my opinion in that it can be used on any shaft even magnetic stainless. Further, if you need to "straighten" a bent shaft, machine down the base material. Perform weld buildup. Then remachine.