SMAW_Presentation.pptx powerpoint presen

smaw

1. Shielded Metal Arc Welding (SMAW) An Introduction to Stick Welding Prepared for NC II Training

2. Introduction to SMAW - Also known as stick welding - Uses a consumable electrode coated in flux - Creates a strong and durable weld - Commonly used in construction, shipbuilding, and manufacturing

3. Welding Safety Precautions - Always wear proper PPE (helmet, gloves, apron, safety glasses) - Ensure proper ventilation - Keep flammable materials away - Inspect equipment before use - Follow correct handling and storage of electrodes

4. SMAW Equipment and Tools - Welding machine (AC/DC) - Electrodes (E6010, E6013, E7018, etc.) - Electrode holder and ground clamp - Chipping hammer and wire brush - PPE: Welding helmet, gloves, apron, boots

5. Electrode Classification - E6010: Deep penetration, fast freeze, DC only - E6013: All-position, smooth finish, AC/DC - E7018: Low-hydrogen, high-strength, AC/DC - Numbers indicate tensile strength, welding position, and coating type

6. Welding Positions - 1G: Flat position - 2G: Horizontal position - 3G: Vertical position (uphill or downhill) - 4G: Overhead position

7. Basic Welding Techniques - Maintain correct arc length (approx. electrode diameter) - Use proper travel speed to avoid excessive build-up - Control electrode angle (10-15° tilt for most positions) - Strike and maintain a stable arc

8. Common Welding Defects - Porosity (gas pockets in weld) - Undercut (groove along weld edges) - Slag inclusion (trapped slag in weld bead) - Lack of fusion (poor bonding between metal and weld) - Cracks (due to rapid cooling or contamination)

9. Inspection and Quality Control - Visual inspection for defects - Bend test to check weld strength - Radiographic/X-ray testing for internal flaws - Follow welding procedure specifications (WPS)

10. Summary and Conclusion - SMAW is a versatile and widely used welding process - Safety is a top priority - Proper electrode selection ensures strong welds - Practice is key to mastering welding techniques - Always inspect welds for quality and integrity