This category of articles contains various welding processes which dominate most of the welding in the industry. Some of these processes are TIG welding, MIG welding, FCAW, Oxyfuel welding, SMAW, Plasma arc welding, and some other processes such as resistance welding, flash welding, etc.
In this article, we shall see an introduction on the various types of oxy acetylene welding flames, how to identify them by their appearance, lighting the acetylene torch to obtain a flame, and temperatures observed in the various portions of the flame. Later on, each kind of flame has been discussed in some detail, including … Read more
The gases stored in the gas cylinders used for oxy-acetylene welding are originally at very high pressure, and cannot be directly used as such. Here, the oxygen and acetylene regulators play an important role in reducing this pressure to a working pressure. These regulators enable maintaining a constant desired pressure at the point of delivery, at a … Read more
Resistance welding is the name given to a group of welding processes in which coalescence between two metals is obtained by heat arising out of resistance posed by the work-piece to the flow of current. Pressure is generally applied to secure the joint firmly. The work-piece is a part of the electric circuit, through which … 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
Oxyacetylene welding of cast iron is relatively easy if attention is paid to some simple aspects of it. Not just the aspects specific to cast iron, but aspects in general about oxyacetylene welding as well. This article contains some hands-on advice on the subject. The commonly used variety of cast iron is the grey cast iron. If … Read more
Oxyfuel welding is a welding process in which metals are joined by heat of the flame emanating from the tip of an oxyfuel welding torch. The pressure may or may not be applied and filler rod may or may not be used. As the name suggests, any oxy-fuel welding process involves two gases. One is … Read more
This article starts with an overview of oxy-fuel cutting overview, and proceeds to explain in detail about the oxy-acetylene cutting process. Oxy-Fuel Cutting Overview When steel is exposed to high temperatures of the order of 1600°F (871°C), it gets oxidized very fast by the oxygen. Steel gets oxidized by oxygen at room temperatures too, but … Read more
This article introduces copper, brass and bronze and their properties pertinent to their weldability. In the latter stages of article, aspects related to welding of copper, brass and bronze have been discussed in some detail. Copper Copper has a reddish color, see the figure below. It has high electrical and thermal conductivity. Because of its’ … Read more
The term steel does not mean any one single composition. It is a vast variety of alloys that can all be called steel. If the metal has only carbon, and does not contain any other intentionally added alloy (except the impurities), then it is called plain carbon steel. Sometimes, elements such as vanadium, chromium, molybdenum, … Read more
Plasma arc cutting works on the same basic principles as the plasma arc welding. A column of hot ionized plasma issues from a constricting nozzle at a high velocity, and melts the base metal. It then removes molten metal to produce a kerf. In this article, we shall see in brief about the various components … Read more