Welding is a fabrication process that joins metals by causing two separate pieces to merge into one. I've been interested in learning more about the history and types of welding, as many welding techniques require gas mixes. Here at Environics, we have worked with various customers to create systems for welding processes.
Joining two pieces of metal sounds straight-forward, right? But the options are astounding! Let's look at the history and the relatively recent explosion of techniques.
Until the end of the 19th century, forge welding was your only option. This was used by blacksmiths for centuries to join iron and steel by heating and hammering them. This technique is still practiced and can be observed and even attempted in the reenactment community of Old Sturbridge Village.
Late in the century, three additional techniques, arc welding, oxyfuel welding and resistence welding developed.