The electrodes used in flux-cored arc welding are made up of a flux core, surrounded by a metal sheath. The primary function of flux at the core of the wire is to provide shielding to the arc from the oxidizing gases in the atmosphere such as oxygen and nitrogen. The metal sheath accounts for 75 … Read more
The classification system for SMAW electrodes is identical between AWS (American Welding Society) and ASME BPVC. In this article, we shall take reference from ASME BPVC Section II Part C for studying various electrode classification. The SMAW electrodes are classified under the following specifications in ASME Section II Part C. SFA 5.1: specification for carbon … Read more
Welding arcs is a source of intense heat that is used to melt the base metal and filler metal to produce a weldment. Arc is where the real action happens, in the course of all arc welding processes. In this article, we shall discuss in brief about the function of welding arcs, and different kind of forces … Read more
Flux-cored arc welding is a variation of gas metal arc welding (GMAW). In fact, the only feature that makes it distinct from the GMAW is the flux-cored wire that is used as the filler as well as electrode. As the name suggests, the flux-cored wire is cored with flux. It is a tubular electrode, with a … Read more
The welding consumables in the welding process come in a variety of forms. For shielded metal arc welding, the filler comes in the form of a flux covered stick electrode. For flux-cored arc welding, it comes in the form of spooled wires that have flux at the core, and a metal sheath around it. In … Read more
In order to understand about the polarity in an arc welding circuit, it is first important to understand the construction of the arc welding circuit. This article discusses a few terms used in any electrical circuit such as EMF, current, and resistance. The later part of the article equates the welding electrical circuit to ordinary … Read more
In order to effectively weld stainless steel with tungsten inert gas welding process, it is important to consider carbide precipitation. TIG Weld Stainless Steel : Carbide Precipitation What is Carbide Precipitation? Carbide precipitation is said to occur when the chromium and carbon in 300 series stainless steels are drawn out of the microstructure and react with atmospheric … Read more
In welding – besides the current current power source, the second type of power source is the constant voltage (CV) machine or the constant potential (CP) machine. It has a relatively flat volt-ampere characteristic curve. In this article we shall discuss about arc welding with constant voltage. Features Of A Constant Voltage Machine The figure below shows … Read more
The power source is the most important part of the arc welding equipment. In all arc welding processes, two kinds of power sources are generally used, from a voltage-ampere output characteristics point of view. One is constant current type, the second is constant voltage type. This article details the constant current type power sources in … Read more
SAW, short for submerged arc welding is a welding process in which joining of metal is obtained by striking an electric arc between a consumable wire electrode and the work-piece. Shielding is provided by a blanket of flux which covers the arc completely. In other words, the arc is submerged under the flux. The process … Read more