Flux Cored Arc Welding Handbook William H. Minnick

MIG welding made easyIntroduction -- Making your first weld -- Patch panels -- More powerful machines -- Plasma cutting -- Closing thoughts.Goes through the entire welding process step-by-step, and gives clear descriptions of how each factor affects the weld, including wire speed, voltage, stickout, gun angle, travel speed, and gas flow. Also covers plug welds, patch panels, welding aluminum, and using flux core wire.Call #: Popular TK4660 M636 2006 DVD

Flux Cored Arc Welding Handbook William H. Minnick

After the discovery of the short pulsed electric arc in 1801 by Humphry Davy[2][3] and of the continuous electric arc in 1802 by Vasily Petrov,[3][4] arc welding developed slowly. C. L. Coffin had the idea of welding in an inert gas atmosphere in 1890, but even in the early 20th century, welding non-ferrous materials such as aluminum and magnesium remained difficult because these metals react rapidly with the air, resulting in porous, dross-filled welds.[5] Processes using flux-covered electrodes did not satisfactorily protect the weld area from contamination. To solve the problem, bottled inert gases were used in the beginning of the 1930s. A few years later, a direct current, gas-shielded welding process emerged in the aircraft industry for welding magnesium.[6]

Gas tungsten arc welding uses a constant current power source, meaning that the current (and thus the heat flux) remains relatively constant, even if the arc distance and voltage change. This is important because most applications of GTAW are manual or semiautomatic, requiring that an operator hold the torch. Maintaining a suitably steady arc distance is difficult if a constant voltage power source is used instead since it can cause dramatic heat variations and make welding more difficult.[23]