Suojakaarihitsaus

Suojakaarihitsaus, also known as shielded metal arc welding (SMAW), is a manual arc welding process that uses a consumable electrode coated with a flux to lay down welds. The process is widely used in various industries due to its simplicity, portability, and cost-effectiveness. The electrode is held in a welding gun, and an electric current is passed through it, creating an arc that melts the base metal and the electrode. The flux coating on the electrode decomposes during welding, producing gases that shield the weld pool from atmospheric contamination and a slag that protects the weld from oxidation.

The SMAW process is characterized by its versatility, as it can be used on a variety of materials, including carbon steel, low-alloy steel, and some stainless steels. It is commonly used for welding pipes, structural steel, and other heavy-duty applications. The process is also suitable for field welding and repair work due to its portability and the availability of various electrode sizes and types.

However, SMAW has some limitations. It is generally slower than other welding processes, such as gas metal arc welding (GMAW), and produces a rougher weld surface. The process also generates more spatter and fumes, which can be a health hazard. Despite these limitations, SMAW remains a popular choice for many welding applications due to its simplicity and cost-effectiveness.