GMAW (Gas Metal Arc Welding)
GMAW Training: Half-Day Course
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GMAW, previously known as MIG welding, is one the most commonly used arc welding process in the automotive industry. Benefits include high production speeds and ability to add filler metal for strength. This course introduces users to fundamentals of GMAW starting with an introduction to process physics including welding modes (spray transfer and globular transfer), effect of polarity, and torch angle. In the second section, we will review steel metallurgy and chemistry as it relates to solidification of steels and formation of different phases such as austenite, ferrite, and martensite; effect of alloying elements and impurities on weld quality and defect formation will also be presented. The next section covers process variables such as voltage/current control, shielding gases, wire speed, electrode orientation, and joint position. The following section will cover weld defects (overlap, undercutting, underfill, porosity, incomplete fusion, weld metal cracks, and heat-affected zone cracks) and present strategies to reduce defects using process control. The last section delves into weld quality and use of welding standards to set limits and tolerances on weld defects to make sure that welded parts meet customer requirements.
The GMAW training is designed as a half-day course and can be combined with half-day of hands-on training.