Course Details
Course Code:
WELD 210
Calendar Description:
Gas Tungsten Arc welding (GTAW) is the most versatile of the welding processes. It was developed originally for welding corrosion resistant and other difficult-to-weld metals such as aluminum, stainless steel, and magnesium. There is an increasing demand for GTAW or TIG welders. This course is part of the three month self-paced, Welding 'B' Level program. To complete the Level 'B' welder program, students must complete Module P7 and 1 of Modules P8, P9, or P10. To advance to 'A' Level, P-10 must be completed. Students requiring additional time to complete may, with the approval of the instructor, purchase additional weeks of instruction.
Date First Offered:
2007-09-04
Hours:
Total Hours: 90
Lecture Hours: 5
Shop Teaching Kitchen: 25
Total Weeks:
3
This course is offered online:
No
Pre-Requisites:
Students must have successfully passed the Welding Level 'C' Program
Non-Course Pre-Requisites:
Proof of 'C' Level Certification or written approval from the Industry Training Authority
Co-Requisites:
None
Rearticulation Submission:
No
Course Content:
Gas Tungsten Arc Welding Process and its Applications
Identifying and Assembling Gas Tungsten Arc Welding Equipment
Gas Tungsten Arc Weld Fillet Welds Using Mild Steel Filler Rod on Mild Steel Plate
Gas Tungsten Arc Weld Groove Welds Using Mild Steel Filler Rod on Mild Steel Plate
Gas Tungsten Arc Weld Fillet Welds Using Stainless Steel Filler Rod on Stainless Steel Sheet
Gas Tungsten Arc Weld Groove Welds Using Mild Steel Filler Rod on Stainless Steel Sheet
Gas Tungsten Arc Weld Fillet Welds Using Aluminum Filler Rod on Aluminum Sheet
Gas Tungsten Arc Weld Groove Welds Using Aluminum Filler Rod on Aluminum Plate
Learning Outcomes:
Describe the Gas Tungsten Arc Welding Process and its Applications
Describe the GTAW process
Identify the function of the electrode in GTAW
Identify the function of shielding gases in GTAW
Identify the basic components of a GTAW work station
Identify applications of GTAW
Describe advantages and disadvantages of the GTAW process
Identify the safety requirements for GTAW
Identify and Assemble Gas Tungsten Arc Welding Equipment
Describe types of GTAW power sources
Identify welding currents used in GTAW
Identify controls of GTAW power sources
Identify types of shielding gases used in GTAW
Describe the weld beads produced by the different gases
Describe leading and trailing gases
Describe flowmeters and gas regulators
Identify the classification of electrodes used for GTAW
Identify the types of GTAW electrodes
Assemble gas tungsten arc welding equipment
Gas Tungsten Arc Weld Fillet Welds Using Mild Steel Filler Rod on Mild Steel Plate
Identify filler rods for GTAW on mild steel
Describe joint preparation for GTAW on mild steel
Identify weld defects common to GTAW on mild steel
Strike an arc using the touch start method
Strike an arc using high frequency
Weld stringer beads in the flat position on mild steel sheet
Weld fillet welds in the 1F position on lap and tee joints on mild steel sheet
Weld fillet welds in the 1F position on lap and tee joints on mild steel sheet
Weld fillet welds in the 3F position (uphill) on lap and tee joints on mild steel sheet
Gas Tungsten Arc Weld Groove Welds Using Mild Steel Filler Rod on Mild Steel Plate
Bevel and fit up single vee butt joints for GTAW on mild steel plate
Weld groove welds in the 1G position on mild steel plate
Wld groove welds in the 2G position on mild steel plate
Weld groove welds in the 3G position on mild steel plate
Gas Tungsten Arc Weld Fillet Welds Using Stainless Steel Filler Rod on Stainless Steel Sheet
Identify the filler rods used on stainless steel
Identify the welding current for GTAW on stainless steel
Describe pre-cleaning and edge preparation for stainless steel
Describe the use of solar flux
Describe gas purging with backing bars
Identify problems particularly related to welding stainless steel
Weld stringer beads in the flat position on stainless steel sheet
Weld fillet welds in the 2F position on tee joints on stainless steel sheet
Gas Tungsten Arc Weld Groove Welds Using Mild Steel Filler Rod on Stainless Steel Sheet
Correctly fit up and tack weld square butt joints on stainless steel
Apply solar flux, or use backing, to protect the back side of the joint form contamination
Make single pass groove welds in the flat position on stainless steel sheet
Make single pass groove welds in the horizontal position on stainless steel sheet
Gas Tungsten Arc Weld Fillet Welds Using Aluminum Filler Rod on Aluminum Sheet
Identify the filler metals for aluminum
Describe joint design and edge preparation for aluminum
Identify precleaning and post cleaning methods for aluminum
Weld stringer beads on aluminum sheet
Weld fillet welds in the 1F, 2F, and 3F positions on aluminum sheet
Gas Tungsten Arc Weld Groove Welds Using Aluminum Filler Rod on Aluminum Plate
Weld groove welds on open square butt joints in the 1G position on aluminum sheet
Weld groove welds on open square butt joints in the 2G position on aluminum sheet
Weld groove welds on open square butt joints in the 3G position (uphill) on aluminum sheet
Grading System:
Percentage
Passing Grade:
70%
Grading Weight:
Final Exam: 100 %
Nature of Participation:
Students are expected to complete a variety of welds and may continue to practice welds until a pass is obtained
Percentage of Individual Work:
100
Course Offered in Other Programs:
No
Additional Comments:
As the course is self-paced, students may take up to three months to complete the entire 'B' Level portion of the welding program. To obtain a passing grade in the practical portion, students may practice their welding techniques until a passing mark is obtained. Students requiring additional weeks to complete may purchase additional weeks of instruction on a weekly basis, and must have the instructor's approval. Students must attain a 70% theoretical mark for all modules.
Supplies:
The following tools must be supplied by students:
Metal tool pail (max 10" diameter) or small tool box with tote tray
Clear CSA approved safety glasses
High top steel-toe CSA approved leather work boots
Padlock for locker
12' metric/imperial tap measure
Arc welding helmet
2 pair welder's gloves
One-piece oxy-acetylene goggles
Tri-flint spark lighter
Tip cleaners
Small metal protractor
Welder's leather jacket or cape sleeves
100% cotton overalls (bib or full)
#10R straight jaw vice grip
10" crescent wrench
1 1/2 lb 24 oz fibreglass handle ball peen hammer
12" STT metric/imperial combination square
Centre punch
10" slip joint pliers
1/2 RD Pipeliner NCH 14" file with handle
45/90 degree magnet
Text Books:
Required - Industry Training Authority, 1995, P10 Gas Tungsten Arc Welding (GTAW I) (Queen's Printer, Victoria, BC). Chapters Covered: All