It is important to know different types of joints in welding, so that one can choose the right kind of joint for an application. In this article, we shall see in detail about ‘T’ joint welding, the kinds of edge preparation in welding of such joints, and some of the difficulties associated in welding of tee joints. … Read more
Metal tests enable us to identify metals for welding. Any welding procedure must take into account the chemical composition and mechanical properties of the base metal. Metal tests enable us to identify a metal, and establish its properties. When the behaviour of metal is known, then a compatible filler metal can be chosen, and the … Read more
This article discusses about a few welding processes that are not as commonly used as say, SMAW, GTAW, SAW, etc. Although a large number of variations of each conventional process exist, this article limits to a discussion of only electron beam welding, friction welding, thermit welding, laser welding and flash welding. Electron Beam Welding In … Read more
In most arc welding processes, gases evolve during the arcing operation. These gases should be let out to atmosphere through adequate ventilation. Special attention must be paid when welding in confined spaces. A high concentration of these gases is harmful for the health. A high concentration reduces the oxygen available for breathing for the operator … Read more
Magnesium is a very light weight metal. It has good machinability and corrosion resistance. When alloyed with small quantities of other metals such as aluminum, manganese, zinc, zirconium, etc., its’ properties can be further improved to sit a variety of applications. It also has a very low melting point. However, magnesium is a very reactive … Read more
High Hardness Alloy Steels, include a large number and variety of high strength, high hardness, corrosion-resistant alloy steels, which have been developed with other special properties. Most of these steels depend on a special heat treatment process in order to develop the desired characteristic in the finished state. Alloy steels have greater strength and durability than other … Read more
Welding stresses are an unavoidable feature of any welding. Stresses inside a weldment may result in many undesirable consequences such as distortion, buckling, warping, lamellar tearing, cracking, brittle fracture, fatigue fracture etc. When weld metal is added to a joint, it is akin to cast metal. When the weld metal cools, it contracts. This is … Read more
Non-consumable electrodes are the ones that don’t get consumed during the welding process. An examples of such electrodes is the tungsten electrode used in the gas tungsten arc welding process. Another example is the carbon electrode used in the carbon arc welding process. In this article, we shall discuss in brief about these two non-consumable … Read more
Aluminum can be joined by welding, brazing, as well as soldering. The choice of process depends on the strength of the joint required, composition of the base metal, joint configuration. Each process offers its’ own set of advantages and limitations. In this article, we shall discuss a few aspects related to the gas welding of … Read more
In industrial welding, getting a welding position of our choice is not always in our hands. Welding must be done in the position dictated by the application. It is a good thing, that – today, we have electrodes and techniques available with which welding is possible in almost any position. Some processes allow welding only … Read more