Welding is a fabrication process that joins materials, mostly metals, by using high heat to melt the parts together and allowing them to cool, causing fusion. It is a widely used technique in the fabrication of equipment such as tubes or heat exchangers.
Latest welding news
Below you can find the latest newsitems that involve the topic of welding.
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Additive manufacturing (AM) processes are rapidly maturing and offer the capability to build a new generation of components with complex designs, enhanced functionality, and rapid repair of existing components.
Butte College in Oroville, CA is home to a thriving welding technology program. This curriculum offers vocational courses designed to produce qualified personnel for certified welding jobs.
Miller Electric Mfg. LLC introduces the new Multimatic 235 multiprocess welding power source, which offers ease of use and higher output for professionals in manufacturing/fabrication, MRO, construction fabrication, and education.
While duplex stainless steels are strong and versatile materials, they need to be treated with respect during welding. At Duplex World 2021 (24 & 25 February, RDM Rotterdam, the Netherlands), two separate sessions will cover this important topic.An interactive workshop on 24 Feb, titled 'Welding & special treatments' will begin with a discussion of duplex/ super duplex GTAW pipe welding.
YuMing Zhang, James R. Boyd Professor in the Department of Electrical and Computer Engineering, has received a grant from the National Science Foundation to further his ongoing research into realizing fully robotic automation of complex welding tasks.
EPRI recently received a USD 5.1M award from the U.S. Department of Energy (DOE) to continue a collaborative research effort that is developing and demonstrating modular-in-chamber electron beam welding for future advanced nuclear reactor plants.
PaR Systems has been known by its long-term aerospace clients such as NASA, United Launch Alliance (ULA) and many others for its contributions to applications in perhaps the most demanding environment of all: space exploration.
The new SmartFil extraction unit from KEMPER sets a new standard in mobile welding fume extraction for regular welding. At a comparable price level, the SmartFil offers twice the filter surface and thus a significantly longer service life compared with similar systems.
Stainless steel is a popular material in various industries due to its corrosion resistance, durability, and aesthetic appeal. Here are some key points to consider when welding stainless steel:
Choose the appropriate welding process: There are several welding processes suitable for stainless steel, including Tungsten Inert Gas (TIG) welding, Metal Inert Gas (MIG) welding, and Stick welding (Shielded Metal Arc Welding). TIG welding is often preferred for stainless steel due to its precision and ability to produce high-quality welds.
Prepare the materials: Before welding, it’s important to clean the stainless steel surfaces to remove any contaminants, such as oil, grease, or dirt. Use a stainless steel wire brush or a dedicated solvent to clean the area.
Select the appropriate filler material: When welding stainless steel, it’s generally recommended to use a filler metal that matches or is compatible with the base metal. Commonly used filler materials for stainless steel welding include austenitic stainless steel filler rods or wires, such as ER308, ER309, or ER316.
Set the welding parameters: The welding parameters, such as current, voltage, travel speed, and shielding gas flow rate, will depend on the thickness of the stainless steel and the specific welding process being used.
Ensure proper shielding gas: Stainless steel welding typically requires the use of an inert gas, such as argon or a mixture of argon and helium, to create a protective atmosphere around the weld and prevent oxidation. The shielding gas should be supplied continuously and cover the weld pool adequately.
Maintain good joint fit-up and control heat input: Stainless steel has a relatively low thermal conductivity compared to other metals, so it’s essential to control the heat input during welding. Proper joint fit-up, including gap and root opening, helps control distortion and ensures proper fusion.
Post-weld treatment: Stainless steel welds may require post-weld treatment to restore corrosion resistance. This can involve processes such as passivation or pickling, which remove any oxides or contaminants from the welded area. The specific post-weld treatment will depend on the application and the stainless steel grade used.
It’s important to note that welding stainless steel can be complex, and there may be additional considerations depending on the specific application, grade of stainless steel, and welding codes and standards. If you’re not experienced in welding stainless steel, it’s advisable to consult with a professional welder or seek training to ensure proper techniques and safety precautions are followed.
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