Arc Welding Processes Handbook

Ramesh Singh

• Éditeur: Wiley-Scrivener
• Année: 2021
• ISBN:
  9781119819066
• Édition: 1
• Sujet: Tecnologia e ingegneria
• Sous-sujet: Scienza dei materiali

ARC WELDING PROCESSES HANDBOOK

An applied reference, each part of this Handbook gives valuable information regarding the industry or industries where the process is commonly used as well as a description of the equipment.

Written by a welding/metallurgical engineer with over 40 years of experience, Arc Welding Processes Handbook delivers the welding and materials expertise required to master complex welding processes and techniques to ensure that the task is done correctly and safely, while reinforcing an understanding of international welding standards and rules.

The perfect handbook for those professionals who need an up-to-date reference to advance processes as well as those welders new to the field and need to hone their skills. Arc Welding Processes Handbook five-part treatment starts with a clear and rigorous exposition of the applications and equipment of Shielded Metal Arc Welding (SMAW) and Gas Tungsten Arc Welding (GTAW), followed by self-contained parts concerning processes applications and equipment for Gas Metal Arc Welding (GMAW), Flux Core Arc Welding (FCAW), and Submerged Arc welding (SAW).

An applied reference, each Part of Arc Welding Processes Handbook offers valuable information regarding the industry or industries where the process is commonly used as well as a description of the equipment. In addition, this Handbook discusses the challenges presented by a number of corrosion-resistant alloys (CRAs). Case studies are included throughout the reference to reinforce an understanding of how these processes were applied in the field and how they intersect with issues that may arise with equipment use and materials.

The reader will also find in the Handbook:

• Highlights the key advantages and limitations of each process and suggests an alternate approach to overcome those limitations
• One-of-a-kind case studies to reinforce an understanding of international welding standards and rules.
• Quality of welds, type of equipment, materials, and inspection and testing for each process.
• Metal joining processes like soldering and brazing.

Audience

The intended market for this book is professionals working in shipbuilding, construction of buildings, bridges, and other structures and to join pipes in pipelines, power plants, manufacturing, and repair.

1
Introduction to Welding Processes

1.1 Synopsis

The chapter introduces the most common welding and joining processes, by discussing the acceptable definition of welding, and the elementary understanding of skill development steps required to be a welder or a welding machine operator.

1.2 Keywords

Joining processes, definitions, welding, arc welding, arc efficiency, heat, heat affected zone (HAZ), solidification.

1.3 Welding

When we speak of welding, various images comes to our minds. Depending on persons’ knowledge and experience with the process that can be various, simple or complex. But one thing that can be common to all those images and pictures is that the process of joining two pieces of metal to create a useful object.

This establishes one aspect of the term welding, that is, that the welding is a metal joining process. Let us explore a little more about what is welding, and how it is different from other Joining processes?

There have been discussions and sometimes arguments on describing if welding is an art or a science. Mundane as it might appear the question is pertinent and, in my experience, some well-meaning experts often miss the point as to which part about the term “welding” they are referring about to support their arguments. Welding as the physical and practical part of joining two materials in most part is an art, it requires dexterity in hand, and hand-eye coordination to do a good job. However, the study of the heat and melt flow solidifications prediction, prediction of material behavior under heating and cooling cycles associated with the term welding is a science, an essential pat under the science of physics. Hence it is both an art, and a science of joining metals by use of adhesive and cohesive forces between metals by welding, brazing, and soldering some of these joining processes produce metallurgical bonds. Person with the balanced knowledge of both science, and art parts of welding is expected to do much better work on either side of the argumentative divide. Further we get into the depth of the study, the line of separation from art to physics starts to become more evident.

Both process metallurgy and physical metallurgy is involved in welding. Welding is a unique metallurgical activity as it involves a series of metallurgical operations similar to metal production, like steelmaking and casting but in a rapid succession and on a very small scale. In science side of welding the thrust of the study is on the materials behavior during application of localized heat, and cooling and solidification physics.

1.4 Defining Welding

The AWS definition for welding is “a materials joining process which produces coalescence of materials by heating them to suitable temperatures with or with...