Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 16, Problem 1R
What early advancements made the GTA welding process more effective and reduced its cost?
Expert Solution & Answer
To determine
The early advancements that made the GTA welding process more effective and reduced its cost.
Explanation of Solution
GTA Welding: Gas tungsten arc welding (GTAW) process is also referred to as Heliarc or tungsten-inert-gas (TIG) welding. In this process, a non-consumable electrode (tungsten) is used for the arc generation. The melting of the electrode does not take place in this process, although the melting of work takes place at the spot where the arc impacts its surface. A molten metal pool is generated due to the melting of work. The filler metal of thin wire is fed directly into the molten metal pool. An inert gas is used to provide needed arc characteristics.
The effectiveness and cost reduction of the GTAW process is achieved by:
- The improvement in the composition of the gas (switching from Helium to Tungsten).
- Theproper understanding of the importance of polarity.
- Use of argon gas instead of aluminium.
Before the development of GTAW process, the helium gas was utilized as the protecting gas for the GTAW procedure alongside DCEP welding current.However, this gas causes numerous issues that restricted the uses of the GTAW procedure. The welding of aluminium was troublesome by GTAW process before its improvement, yet the utilization of argon gas makes this procedure more common.
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Chapter 16 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 16 - What early advancements made the GTA welding...Ch. 16 - What metals were weldable only by the GTAW process...Ch. 16 - Which two of tungsten's properties make it the...Ch. 16 - Why must the tip of the tungsten be hot?Ch. 16 - Prob. 5RCh. 16 - What functions regarding tungsten heat do the...Ch. 16 - What problem can an excessively large tungsten...Ch. 16 - What holds the molten ball of tungsten in place at...Ch. 16 - Using Table 15-1, answer the following: a. What...Ch. 16 - What does adding thorium oxide do for the tungsten...
Ch. 16 - How can the end of a tungsten electrode be shaped?Ch. 16 - Why should a grinding stone that is used for...Ch. 16 - Why should the grinding marks run lengthwise on...Ch. 16 - What are three ways of breaking off the...Ch. 16 - What is the correct color to use on the balled end...Ch. 16 - Why should the torch be as cool as possible?Ch. 16 - What will happen to a water-cooled torch cable if...Ch. 16 - Why must shielding gas hoses not be made from...Ch. 16 - What materials can be used to make nozzles?Ch. 16 - What problem can a long nozzle cause to the...Ch. 16 - Why must the tube of a flow meter be vertical?Ch. 16 - What is the heat distribution with DCEN welding...Ch. 16 - What is the heat distribution with DCEP welding...Ch. 16 - What is the heat distribution with AC welding...Ch. 16 - Why must AC welding power use high frequencies to...Ch. 16 - Why are argon and helium known as inert gases?Ch. 16 - Why is argon's ease of ionization a benefit?Ch. 16 - What makes helium difficult to use for manual...Ch. 16 - What are the benefits of adding hydrogen to argon...Ch. 16 - What is the purpose of a hot start?Ch. 16 - Using Table 16-3, determine the gas post flow time...Ch. 16 - What functions can a remote control provide the...Ch. 16 - Using Table 16-4, determine the minimum gas flow...
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