Flux Cored Arc Welding

A power point presentation. Below is the requirements. The paper that has been wrote is also below. Part 3: Power Point Presentation: In a five minute presentation, you will discuss the product or method description, evaluation, and recommendations based on your research. Briefly, you will discuss how your secondary sources support your recommendations for the continued use, altered use, or disuse of the product or method. There will be a one minute Questions and Answer session. Presentations must use visual aids. Although the research portion of this project requires a minimum of 3-5 secondary sources, you will still need to include a list of sources for your images used at the end of the Power point. Flux-Cored Arc Welding Ashton Chavis Eng. 110 April 6, 2019 Flux Cored Arc Welding Flux cored arc welding (FCAW) is a type of arc welding based on the use of an arc between the weld pool and a continuous filler metal electrode fed in the form of a wire from a spool into the gun through the welding cable assembly. The current melts both the base metal and the wire containing the flux. As a result of vaporization, part of the flux transforms into the gas, forming a cloud protecting the surface of the weld. At the same time, some of the flux travel across the arc along with the molten filler metal, entering the molten weld pool. There, the flux collects impurities present in the molten weld metal and transfers them to the surface, thus forming a slag during cooling (Jeffus, 2015, p. 10). There are two main categories of FCAW processes: a gas-shielded version (FCAW-G) and a self-shielded version (FCAW-S). The former version, which uses carbon dioxide, argon, argon-oxygen mixture, or argon mixed with carbon dioxide for shielding, is characterized by a greater ability to add useful fluxing agents and alloying elements to wire electrodes, less fume production during welding, and, as a rule, better mechanical properties of welds. In the latter version, the flux contains special additives, which form a shielding gas during decomposition. FCAW-S is the preferred choice when the welding process is performed in windy conditions or outdoors, as in the case of FCAW-G, there is a risk that the gas shielding may be blown away. Moreover, due to the fact that FCAW-G requires the shielding gas cylinder and a gas shielding system, this technology is less portable (Jeffus, 2015, p. 299). Today, equipment manufacturers offer both semi-automatic and automatic solutions for FCAW. Generally, equipment for FCAW is very similar to equipment used for gas metal arc welding (GMAW) and consists of the following components: a power source, welding cables, control, and welding gun. Unlike GMAW, FCAW system also includes a wire feeder that provides a constant wire feed speed through the welding gun to the workpiece. Most FCAW power supplies are designed to operate on a single- or three-phase 50-60 Hz input frequency with an input power of 230 or 460 volts (HIWT, 2012, p. 6). Shielding gas equipment used in a FCAW-G version consists of a gas regulator, a gas supply hose connected to the gun, and control valve. The major manufacturers of flux-cored arc welding equipment and wires are Hyundai Welding Co., The Lincoln Electric Company, Colfax Corporation, Illinois Tool Works Inc., Telsas Wire Products, Betker & König GmbH, Corodur Fülldraht GmbH, ESAB GmbH, Fischel Schweißtechnik GmbH, B. Schmid Co AG (industrystock.com, 2019). A noticeable improvement in physical properties, in particular strength, as well as corrosive properties of the finished welded part can be achieved by optimizing the flux formula. Various alloying elements, slag agents, deoxidizers, and gas-forming agent can be added in small quantities to enhance the desired weld properties. Vanadium, chromium, and carbon are often added to improve corrosion resistance, hardness, creep resistance, and strength of the weld, whereas the addition of silicon, titanium, and aluminum can help remove nitrides and oxides in the weld. Slag agents used in FCAW fluxes include zirconium, potassium, and sodium (Jeffus, 2015, p. 301).