Weld Metal Hardening via Laser Beam Remelting

A surface metallurgy process where a weld surface is briefly melted using a laser beam and rapidly quenched by the cold base material. This results in martensitic microstructure formation and increased wear resistance.

Don't let all the technical jargon confuse you. In laser welding, you melt the material locally, and the rest stays cold. This causes the weld to cool extremely quickly, and a hard but brittle structure can form. That's the key point: if it goes too fast, you get cracks or a hard but unusable weld. You have to coordinate the energy and the feed speed so that cooling isn't too rapid. Otherwise, you won't have a clean bond, just a hard crust.

MetallurgieSchweißtechnik