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Lesson 1.1

Lesson 1.1. Welding Terminologies. Base metal = Metal of workpieces or weldment Which characteristics need to know ? Mechanical Strength Ductibility Resilence Chemical compositions Ferrous  Non ferrous Low alliage  Alliage Weldability How easy the metal can be welded

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Lesson 1.1

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  1. Lesson 1.1 Welding Terminologies

  2. Base metal = Metal of workpieces or weldment • Which characteristics need to know ? • Mechanical • Strength • Ductibility • Resilence • Chemical compositions • Ferrous  Non ferrous • Low alliage  Alliage • Weldability • How easy the metal can be welded • Which process is suitable • Which quality we can expect • What need to be cared for welds quality satisfactory Base metal

  3. Filler metal = additional Metal comprising welds Filler metal Filler metal Electrode Rod Wire Insert filler

  4. Flux = Chemical materials applied during welding Welding Flux • Flux Requrements • It remains stable and does not change to a vapor rapidly within the temperature range of the welding procedure. • It dissolves all oxides and removes them from the joint surfaces. • It adheres to the metal surfaces while they are being heated and does not ball up or blow away. • It does not cause a glare that makes it difficult to see the progress of welding or brazing. • It is easy to remove after the joint is welded. • It is available in an easily applied form. Welding flux Coated Coated electrode Core Tubular electrode / wire Powder / grain SAW flux Paste Gas welding / Brazing

  5. Distinguish : Joints  Welds Welding Joint Welding Joints Butt joints Corner Joints Tee Joints Lap joints Edge Joints

  6. Part of Joint Part of Joint Root Groove Groove face Root gap Root edge Bevel / groove angle Groove radius Root/joint penetration

  7. Part of Joint Root – Bevel / Groove Root Groove Groove face Root gap Root edge Bevel / groove angle Groove radius Root/joint penetration

  8. Part of Joint Bevel / Groove Face Root Groove Groove face Root gap Root edge Bevel / groove angle Groove radius Root/joint penetration

  9. Part of Joint Gap , edge , radius Root Groove Groove face Root gap Root edge Bevel / groove angle Groove radius Root/joint penetration

  10. Part of Joint Gap , edge , radius Root Groove Groove face Root gap Root edge Bevel / groove angle Groove radius Root/joint penetration

  11. Types of welds Types of Welds String bead Groove weld Fillet weld Surface weld Plug & slot weld

  12. Types of welds Types of Welds String bead Groove weld Fillet weld Surface weld Plug & slot weld

  13. Types of welds Types of Welds String bead Groove weld Fillet weld Surface weld Plug & slot weld

  14. Types of welds Types of Welds String bead Groove weld Fillet weld Surface weld Plug & slot weld

  15. Types of welds Types of Welds String bead Groove weld Fillet weld Surface weld Plug & slot weld

  16. Parts of Welds

  17. Welds Dimension

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