What is welding and how does it work?
At its most basic level, welding is the joining of two or more pieces of metal using heat, forming a strong, durable bond. Whereas some processes, like bolting or riveting, simply connect materials together, welding physically combines the two pieces together at a molecular level.
The materials being joined are called the parent materials or work pieces, and heat needs to be applied to melt the metal at its connection point, also known as the weld joint. The molten metal is the weld pool, and often a filler metal is used to fill any gap between the two work pieces, which aids in strengthening the bond.