Welding techniques overview
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The document discusses three main welding techniques: stick welding, MIG welding, and TIG welding. Stick welding uses an electrode core that acts as the filler material without needing a separate filler. MIG welding uses a continuous wire feed as the electrode and an inert gas mixture as a shield, without requiring a separate filler. TIG welding uses a tungsten electrode with argon gas as a shield, allowing for a smoother weld with reduced cratering and is often used on stainless steel and light metals.
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Here is the arrangement of the welding processes in the table:
Fusion Welding Pressure Welding Brazing and Soldering Other Processes
Arc welding Cold pressure welding
Flash welding Explosion welding
Friction welding - Brazing Electron beam welding
-
Jr2517091717
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
Jr2517091717
This document evaluates the mechanical properties of dissimilar metal tube welded joints using inert gas welding. Tubes made of SS347H, T91, and T22 steels were welded using gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW). Tensile, bend, and hardness tests were used to analyze the properties of the welded joints. The GTAW joints exhibited higher strength (approximately 21% higher) and maximum hardness compared to the GMAW joints. Various defects in the welded joints were also analyzed using non-destructive radiography testing.
Manufacturing technology I ME 8351 joining process
This is very much useful for engineering students, Teachers and industrialist. Adequate knowledge of the concept and principles of welding and welding process used in various industries.
Welding.ppt
The document provides an overview of welding, including definitions of welding, the main types of welding processes, welding terminology, types of welds and joints, welding positions, descriptions of shielded metal arc welding (SMAW) and gas tungsten arc welding (GTAW), and sections on codes and standards, welding inspection, metallurgy, defects, safety, and more. SMAW uses a consumable electrode coated in flux to form an electric arc, while GTAW uses a non-consumable tungsten electrode and inert gas shielding. The document contains detailed information on key aspects of welding.
Welding.ppt
The document provides an overview of welding, including definitions of welding, the main types of welding processes, welding terminology, types of welds and joints, welding positions, descriptions of shielded metal arc welding (SMAW) and gas tungsten arc welding (GTAW), and sections on codes and standards, welding inspection, metallurgy, defects, safety, and more. SMAW uses a consumable electrode coated in flux to form an electric arc, while GTAW uses a non-consumable tungsten electrode and inert gas shielding. The document contains detailed information on key aspects of welding.
Gas Metal Arc Welding" (or GMAW).
What is MIG welding?
Working process
Process Parameters
Advantages
Limitations
Applications
MIG welding is an arc welding process in which a continuous solid wire electrode is fed through a welding gun and into the weld pool, joining the two base materials together.
A shielding gas is also sent through the welding gun and protects the weld pool from contamination.
In fact, MIG stands for “Metal Inert Gas”. The technical name for it is "Gas Metal Arc Welding" (or GMAW).
Arc Welding
Arc welding is a process that uses an electric arc to join metal materials. It generates high temperatures reaching over 5500°C from the electric arc between an electrode and the workpiece. There are two main types of arc welding - consumable electrode welding which melts the electrode to fill the weld joint, and non-consumable electrode welding where the electrode does not melt. Common arc welding methods include shielded metal arc welding, gas metal arc welding, flux-cored arc welding, and gas tungsten arc welding. Arc welding has advantages such as low cost and portability but also disadvantages like producing more waste and requiring skilled operators.
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Welding techniques overview
- 2. Stick Welding • MMA = manual metal arc welding or stick welding • SMAW = Shielded Metal Arc Welding • electrode core itself acts as filler material, no need separate filler • Limited to welding ferrous materials (special electrodes for cast iron, nickel, aluminum, copper, and other metals) Stick as electrode and filler
- 4. MIG • MIG = Metal Inert Gas • GMAW = Gas Metal Arc Welding • continuous wire feed as an electrode and an inert/semi- inert gas mixture to protect the weld from contamination, no need separate filler Using shielding gas
- 5. MIG (2) GMAW Circuit diagram. (1) Welding torch, (2) Workpiece, (3) Power source, (4) Wire feed unit, (5) Electrode source, (6) Shielding gas supply. GMAW torch nozzle cutaway image. (1) Torch handle, (2) Molded phenolic dielectric (shown in white) and threaded metal nut insert (yellow), (3) Shielding gas diffuser, (4) Contact tip, (5) Nozzle output face
- 6. TIG • TIG = Tungsten Inert Gas • GTAW = Gas Tungsten Arc Welding • Tungsten electrode core, with argon as shielding gas • Smoother result and reduce crater/pinhole • can be used on nearly all weldable metals, most often applied to stainless steel and light metals
- 7. TIG (2)