Comparison of the Stainless Steel Discoloration Caused by the Laser Beam and the Arc-welding

Abstract

The removal of stainless steel discoloration caused by the laser beam was tried using a scale remover with the arc-welding, but it was not removed. Therefore, comparison analysis about a color change of the stainless steel surface with the laser beam and the arc-welding was investigated. As a result, the main composition of discoloration caused by the arc-welding was Fe₂O₃ and that of the laser beam processing was Fe₃O₄. And the thickness of oxidation layer caused by the laser beam was 17 times of that of the arc-welding.