Study of optimal hardfacing parameters when restoring electric motor shafts

Abstract

Repairing damaged or worn motor shafts is an important part of the restoration work faced by many industrial plants. In the manufacturing sector, keeping electric motors running optimally is essential to keeping production running smoothly and efficiently. To reduce the cost of purchasing new electric motor shafts in the event of their breakdown or wear, industrial enterprises use surfacing. The quality of the deposited layer is determined, among other things, by the surfacing method and its technological modes.

This article discusses the problem of obtaining a high-quality layer when restoring electric motor shafts by surfacing in three ways: manual surfacing, semi-automatic surfacing in a protective gas environment and automatic submerged surfacing. The advantages and disadvantages of each surfacing method are determined. Optimal technological modes of surfacing (current strength and welding arc voltage) were established using various methods based on an experiment with determination of geometric parameters (weld width, weld height, weld penetration depth) and physical and mechanical properties of restored surfaces (hardness).