Contains info on Brazed joints and related aspects

1. BRAZING
Presentation on
Submitted by
Akshat Shrivastava
213118003

2. What is BRAZING?
• Brazing is a metal-joining process
• In this two or more metal items are joined together by melting and flowing a
filler metal into the joint, the filler metal having a lower melting point than the
adjoining metal.

3. Braze Metal
Consideration
Desired Joint
Properties
Braze Alloy
Selection
Pre Braze
Considerations
Braze Cycle
Consideration
Post Braze
Considerations
Condition of Brazing Success

4. Heat Source of Brazing
• Induction Brazing
• Continuous Brazing
• Batch Brazing
• Vacuum Brazing

5. Torch Brazing
Batch Furnace
Induction Brazing
Continuous Furnace Vacuum Furnace

6. Braze Filler Metals
Base Material Nickel Cobalt Silver Gold Aluminium Copper
Braze Range 927-1205 1175-1245 620-980 890-1230 570-620 750-1150
Maximum
Useful Service
Temperature
980 1040 370 800 150 370
Application - Stainless Steels
- Alloy Steel
- Carbon Steels
- Cobalt
Alloys
- Tool Steels
- Nickel Alloys
- Carbon Steels
- Stainless
Steels
- Alloy Steel
- Carbon Steels
- Aluminium
Alloys
- Cast Iron

7. Butt Joints
Lap Joints
Butt – Lapp
Joints

8. Scarf Joints
T - Joints

9. Brazing Procedure
Cleaning and
Assembly
Melting filler
Metals
Capillary Action of
Molten Metal
Cooling of Molten
Metal

10. Capillary Action in Molten Metals

11. Brazing Joint Morphology

13. Advantages
• Components can be batch processed
• Brazing is production and cost efficient
• Component distortion is minimized or eliminated
• Base metal dilution is low
• Process thermal cycles are predictable
• Joining of dissimilar materials can be achieved
• Thin-to-Thin or Thin-to-Thick members can be joined
• Small and wide gap sizes can be filled
• Specialized labour is not required

15. Thank You