Week 12-13 Flashcards
The electrode is coated in a metal mixture called
Flux
Electrodes designed to melt quickly
Fast-fill
Electrodes designed to solidify quickly
Fast-freeze
Intermediate electrodes go by the name
Fill-freeze or fast follow
AWS means
American Welding Society
It can be caused by excessively high current, a long arc, or arc blow, a condition associated with direct current characterized by the electric arc being deflected away from the weld pool by magnetic forces
Weld spatter
Often not visible without the use of advanced non-destructive testing methods, is a serious concern because it can potentially weaken the weld
Porosity
It is causes by low current, contaminated joint surfaces, or the use of an improper electrode
Poor fusion
It can be addressed by decreasing welding speed, increasing the current or using a smaller electrode
Shallow penetration
It is permanent joint which is obtained by the fusion of the edges of the two parts to be joined together
Welded joint
(Type of welded joint)
It is obtained by overlapping the plates and then welding the edges of the plates
Lap Joint
The cross section of the fillet is extremely
Triangular
The fillet joints may be
Single transverse fillet
Double transverse fillet
Parallel transverse fillet
It is obtained by placing the edge
Butt joint
In butt welds, the plated edges do not require bevelling if the thickness of plate is less than_____
5mm
On the other hand if the plate thickness is ____ to ____, the edges should bevelled to ___ or____ on both sides
5 mm to 12.5 mm
V-groove or U-groove
The butt joints may be
Square butt joint
Single v-butt joint
Single u-butt joint
Double v-butt joint
Double u-butt joint
The other type of welded joints are
Corner joint
Edge joint
T-joint
The main consideration involved in the selection of weld type are
- The shape of the welded component required
- The thickness of the plates to be welded
- The direction of the forces applied
PAW means
Plasma arc welding
GTAW means
Gas tungsten arc welding
Is an arc welding process similar to GTAW
PAW
In PAW, the electric arc is formed between ____ and ______
Electrode
Workpiece
_____ is the temporary state of a gas
Arc plasma
