We will talk about some common metal welding processes after introducing several metal parts manufacturing methods in the previous articles.
4.1 What is Welding?
Welding, also known as fusion welding, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature, or high pressure.
4.2 The classification of Welding processes
Welding of metals can be classified into three categories based on the characteristics of the process: fusion welding, pressure welding, and brazing.
Fusion welding – heating the workpiece to be joined to a molten state to form a molten pool, which solidifies and joins the workpiece after cooling. If necessary, filler metal can be added to assist the process. It is suitable for welding and processing various metals and alloys and does not require pressure.
Pressure welding – Pressure must be applied to the welded parts during welding. This process is suitable for processing various metal materials and some non-metallic materials.
Brazing – Brazing material with a lower melting point than the base metal is used. Liquid brazing material wets the base metal, fills the joint gap, and diffuses with the base metal to achieve the connection of the welded parts. It is suitable for welding and processing various materials, including different metals or dissimilar materials.
