Welding is a fabrication process that joins materials, usually metals or thermoplastics, primarily by using high temperature to melt the parts together and allow them to cool, causing fusion.
Welded blades were developed in the 1st millennium ce, the most famous being those produced by Arab armourers at Damascus, Syria. The process of carburization of iron to produce hard steel was known at this time, but the resultant steel was very brittle.
You need a Los Angeles welder equipped to do on-site mobile welding repairs and fabrication. Noel Welding Center has a current and active license in the State of California (lic #752889) to operate as a welding contractor (C-60) and structural steel contractor (C-51).