Articles & Podcast Episodes

Arc welding has benefits like low costs and easy portability. It needs less equipment and is user-friendly. However, it is less efficient, creating more waste and consuming more electrodes. Drawbacks include risks of cracking, poor fusion, and residual stresses in welds, which can affect durability and safety. However, SMAW has its drawbacks. The process generates … Read more

To use a proper arc welding technique, hold the electrode holder at a 90-degree angle to the metal surface. Quickly strike the electrode against the metal, then pull it back about 1/8 inch to establish an arc. Maintain this position for precision, ensuring safety and effectiveness throughout the welding process. Additionally, selecting the right amperage … Read more

The principle of electric arc welding involves creating an electric arc between an electrode and a workpiece. This arc generates a high-temperature flame that melts the metal at the welding joint. When cooled, the molten metal fuses and solidifies, forming a strong bond that effectively joins two materials together. There are several types of electric … Read more

To prevent and control distortion in arc welding, use effective techniques: avoid overwelding, utilize intermittent welding, limit the number of weld passes, position welds close to the neutral axis, balance welds around this axis, apply backstep welding, manage shrinkage forces, and plan a careful welding sequence. Another effective method involves controlling the welding speed. A … Read more

In arc welding, a power source delivers the electrical energy needed for the process. Common types are AC transformer, DC rectifier, AC/DC transformer rectifier, DC generator, and inverter. The selection depends on control methods such as primary tapped, saturable reactor, thyristor, or inverter to suit specific welding requirements. AC power sources provide a smooth, consistent … Read more

Arc welding is a fusion process that joins metals using intense heat. This heat melts the metal at the joint, allowing the two parts to intermix. Sometimes, a molten filler metal is added to strengthen the weld. This method creates strong metal joints, ensuring a reliable bond between materials. Techniques in arc welding vary widely. … Read more

Plasma is essential in all arc welding processes. Welding arcs contain partially ionized gases called plasmas. In plasma arc welding, a constricted arc plasma produces enough heat for effective welding. Oxy-fuel torches also support these processes, serving both welding and cutting applications. Key concepts in using plasma include understanding the properties of ionized gas and … Read more

Plasma needle arc welding (PAW) is a precise welding process. It uses a focused electric arc between a tungsten electrode and the workpiece. PAW is similar to gas tungsten arc welding (GTAW). It provides better control and produces high-quality welds in ferrous and non-ferrous metals, making it suitable for various applications. The benefits of Plasma … Read more

Plasma transfer arc welding is a precise method to join metals. It uses a high-energy density plasma arc to melt the base metal and metallic filler powders. The process begins by ionizing an inert gas like argon or helium, creating a pilot arc. This pilot arc then transitions into the transferred arc for effective welding. … Read more

An electrode chart for arc welding shows different types of electrodes used in stick welding. It includes electrode classifications, sizes, applications, and the recommended welding amperage. Examples like E6010 and E7018 are listed. This chart helps you choose the right electrode based on metal thickness and project needs. Understanding the relationship between electrode type and … Read more