Welding Flashcards
__________ is a process of controlling the temperature of deposited weld metal between specified limits during multipass welds.
Interpass temperature control
For interpass temperature control, the lower limit is usually the same as the __________ temperature, and accomplishes the same functions.
minimum preheat
If _________ is not used where it should be, excessive grain growth of the weld metal and HAZ can adversely affect the impact properties of carbon and alloy steel weldments.
Interpass temperature control
If _________ is not used where it should be, carbon and low-alloy steels can experience precipitation of nitrides (called blue embrittlement) which adversely affects their impact properties.
Interpass temperature control
If _________ is not used where it should be, austenitic stainless steels (such as the 300 series SSs) can lose corrosion resistance due to excessive sensitization during slow cooling.
Interpass temperature control
If _________ is not used where it should be, cColumbium stabilized austenitic SSs (such as Type 347 SS, Incoloy 825, and Alloy 20) are susceptible to solidification cracking (also called hot-short cracking) during slow cooling.
Interpass temperature control
What is a “VT” weld inspection?
It stands for Visual Testing. It is a visual inspection of a weld, where a qualified inspector examines the weld surface using their eyes, sometimes aided by tools like magnifying glasses, to identify any visible defects like cracks, porosity, undercut, or improper weld bead profile, essentially checking the quality of the weld by looking at its surface appearance
What is a “RT” weld inspection?
What type of weld failure is pictured here?
A crater crack
A(n) ________________ is a crack that forms at the end of a weld bead, specifically in the depression created when the welding arc is terminated. These cracks are often caused by rapid cooling and uneven shrinkage of the weld metal, leading to high residual stresses and subsequent cracking.
They are a serious weld defect because they can significantly weaken the weld joint and potentially lead to catastrophic failure.
crater crack
What does AWS stand for?
“American Welding Society”
It is a non-profit organization that advances the science, technology, and application of welding and allied joining and cutting processes worldwide.
What does WPS stand for?
“Welding Procedure Specification”
It is a formal document that outlines the specific welding procedures and parameters required to consistently produce high-quality welds that meet code and industry standards.
