Articles & Podcast Episodes

Carbon arc welding (CAW) is an arc welding process that uses a high-temperature electric arc. This arc forms between a non-consumable graphite electrode and the workpiece. The heat melts the metals, leading to coalescence. CAW does not require filler material. It is suitable for various applications and offers unique advantages compared to TIG welding. The … Read more

Gas carbon arc welding is suitable for welding reactive materials that can oxidize, like magnesium and aluminum. It works well with non-ferrous metals. This technique produces high-quality welds with minimal contamination, making it ideal for precision tasks in challenging environments. The benefits of carbon arc welding include high heat efficiency and deep penetration, leading to … Read more

To catch an arc while welding, you can use two methods: the scratching method and the tapping method. The scratching method is good for beginners with AC machines. Angle the electrode and drag it across the plate like striking a match. This action helps to create an arc, which is crucial for successful welding. Next, … Read more

Gas Tungsten Arc Welding (GTAW) uses tungsten due to its high melting temperature of over 3,422°C and excellent electrical conductivity. These properties allow tungsten to create stable arcs without melting during the process, ensuring clean, precise welds and enhancing overall welding quality. Safety is a crucial focus in GTAW. The chapter outlines personal protective equipment … Read more

Gas tungsten arc welding (GTAW) is a process that uses a nonconsumable tungsten electrode and inert gas for protection. The electric arc forms between the electrode and the plate, melting the base metal. Filler metal can be added to improve metallurgical fusion during the welding process. Next, effective shielding gas management is essential. Argon is … Read more

Shielded Metal Arc Welding (SMAW) uses a consumable electrode with a flux coating. An electrical arc forms between the electrode and the base metal, protecting the weld from impurities. The flux generates a gas shield around the molten weld pool, improving the joint quality. SMAW is versatile for different welding processes and equipment usage. The … Read more

Charles L. Coffin (1844-1926) invented an important arc welding process in 1890. He received U.S. patent 428,459 for using metal electrodes in shielded metal arc welding (SMAW). This invention greatly improved welding technology and influenced modern techniques, highlighting its historical significance in industrial applications. Coffin’s method revolutionized manufacturing. It allowed for strong and durable joints … Read more

Arc welding equipment uses an electric arc to generate heat for melting and joining metal parts. The power supply applies voltage to the welding electrode and the base material, forming the arc. This method is affordable and portable, making it ideal for various metal joining applications. The arc welding process includes several techniques, such as … Read more

Arc blow happens in DC arc welding when magnetic fields disrupt the welding arc. This deflection often occurs due to residual magnetism in the material. Positioning the welding clamp correctly and using AC instead can help reduce arc blow. Knowing how magnetic fields interact is key to managing this issue. To prevent arc blow, welders … Read more

Slag inclusions are nonmetallic particles trapped in the weld metal or at the weld interface. They form due to faulty techniques, insufficient joint access, and sharp notches that cause entrapment. By improving these factors, welders can significantly reduce slag inclusion in arc welding. To prevent slag inclusion in arc welding, thorough surface preparation is essential. … Read more