32 Week 5 Labs
All of the labs for Week 5 use GMAW spray arc. Use a gas mixture of 90% argon and 10% carbon dioxide when welding with spray transfer in these labs.
Base metals must be clean of mill scales before attempting these welds.
Beads on Plate 1G Spray Transfer
Setup
Materials required are a single 3/16″ to 3/8″ thick steel plate measuring 3″ by 6″.
Positions required are 1G and 2G.
Work
Weld two layers of surfacing beads on the plate in 1G position. On a separate location on the same plate, weld two layers of surfacing beads in 2G position.
Acceptance Criteria
- Consistent weld
- Good tie-ins
- No undercut
- Complete penetration
- Beads must overlap at least halfway onto previous bead
T-Joint 2F Multi-Pass GMAW Spray
Setup
Materials required are your previously constructed x-block with 1/4″ thick steel plates and with overall dimensions of 2″ by 2″ by 18″.
Position required is 2F.
Work
Create a t-joint with 5/16″ fillet welds and multiple passes. This will be the final side of your x-block!
Acceptance Criteria
- Consistent weld
- No porosity
- No undercut
- No cracks
- Beads must overlap at least halfway onto previous bead
T-Joint 2F 4″ Tube to Plate GMAW Spray
Setup
Materials required are a single 1″ long steel round tube with a 4″ or 5″ outer diameter and at least 3/16″ thickness, and a single steel plate with thickness between 3/16″ to 1/2″ and dimensions that allow at least 1″ of visible edge around the tube.
Position required is 2F.
Work
Weld the open end of the tube to the plate with no more than four stops and starts.
Acceptance Criteria
- Consistent weld
- Good tie-ins
- No undercut
- Complete penetration
- No porosity
- No more than four (4) stops and starts to complete the weld
T-Joint 2F 2″ Tube to Plate GMAW Spray
Setup
Materials required are a single 1″ long steel round tube with a 2″ outer diameter and at least 3/16″ thickness, and a single steel plate with thickness between 3/16″ to 1/2″ and dimensions that allow at least 1″ of visible edge around the tube.
Position required is 2F.
Work
Weld the open end of the tube to the plate with no more than four stops and starts.
Acceptance Criteria
- Consistent weld
- Good tie-ins
- No undercut
- Complete penetration
- No porosity
- No more than four (4) stops and starts to complete the weld
