Solid State Welding

Question 1

What is welding

Answer 1

Joins material by using heat to melt part together, allowing cool causing fision.

Question 2

Common welding configuration

Answer 2

Butt joint
Edge joint
Lap joint
Tee joint
Corner joint

Question 3

Common welding defects

Answer 3

Crack
Porosity
Undercut
Overlap
Splatter
Incomplete penetration
Incomplete fusion
Slag inclusion

Question 4

Explain solid state welding

Answer 4

Joining at temperature below melting point of base material without the addition of brazing filler material

Question 5

Advantages and disadvantage of solid state welding

Answer 5

Advantage
- low distortion / residual stress
- Narrow heat affected zone
- sumptuous appearance
- mechanical properties maintained
- ez to join dissimilar metals

Disadvantage
- special design/shapes
- hard to join more than 2 components
- can’t fill wide root gap

Question 6

Type of solid state welding

Answer 6

Diffusion welding (pressure - metal diffuse into each other)
Friction welding (spin and press together, flash)
Ultrasonic welding ( high frequency vibration, sliding)
Roll welding
Spot welding ( pressure and current on spot, weld nugget)
Seam welding (imagine jahit pakaian, current, electrode wheel)
Explosion welding ( boom, component go fast into other component)
High-frequency butt welding (high frequency current, skin effect/neighbouring effect)
Cold welding - no heat just pressure
Forge welding - heat then hammer
Flash welding - arc
Stud welding - arc