FORGE WELDING

Forge welding is a solid-state welding process that joins two pieces of metal by heating them to a high temperature and then hammering them together.

1. WELCOME TO OUR PRESENTATION

2. FORGE WELDING PRESENTATION ON RAJSHAHI UNIVERSITY OF ENGINEERING AND TECHNOLOGY

3. # Forge Welding # PRINCIPLES #CLASSIFICATION # Process parameters # Temperature # Tools needed # Forgeable metals # Common hand tools # Advantage and Disadvantage # Application CONTENTS

4. FORGE WELDING Forge welding is a solid-state welding process that joins two pieces of metal by heating them to a high temperature and then hammering them together.

5. PRINCIPLES STEP 1: Metals are heated to the plastic condition (above 1000 degree Celsius) in a furnace. STEP 2: Heated metals are brought   to  the anvil from heat source and superimposed them.

6. Schematic representation of FORGE welding using Hammer

7. CLASSIFICATION # HAMMER WELDING Hammering is done by heating the metal to the proper temperature, coating with flux, overlapping the weld surfaces, and then striking the joint repeatedly with hammer.  

8. # ROLL WELDING Here the heated metals are overlapped and passed through rollers.

9. # DIE WELDING Here the pieces of metal are heated and then forced into a die.

10. Process parameters Forge-welding temperature Amount of deformation Forging speed

11. TEMPERATURE *Typically 50 to 90 percent of the melting temperature. *Soft low carbon steel = 1250 to 1300 degree Celsius *High carbon and alloy steel = 1100 to 1140 degree Celsius *Wrought iron = little below 1290 degree Celsius

12. TOOLS NEEDED # Furnace

13. # Anvil

14. # Standard cross peen hammer # Flux (Borax / Silica sand)

15. FORGEABLE METALS # Aluminium alloys # Magnesium alloys # Copper alloys # Carbon and low alloy steels # Martensitic stainless steel # Austenitic stainless steel # Nickel alloys # Titanium alloys # Tungsten alloys

16. COMMON HAND TOOLS # Hammers # Black-smith’s gauge # Hot chisel # Brass

17. ADVANTAGES # Good quality welds obtained # Parts of intricate shape welded # No filler material required # Required less matching after welding # Welded joints have low initial cost # Welded joints easily repaired # Noiseless process # High strength welded joints

18. DISADVANTAGES # Low carbon steel is welded # High level of the operator skill is required # Slow welding process # Weld is contaminated by the coke used in heating furnace # Welded joints can not used for collision and vibration # Can not be assembled and reassembled

19. APPLICATION # Aerospace industry # Production of crank shaft # Shipbuilding, cycle industries # Production of pattern-welded blades # Manufacture of shotgun barrels # Small tools like railroad equipments, automobile and trucks, agricultural machinery

20. THANKS TO ALL

21. PRESENTED BY: 145006 REFATI ZANNAT ANANNA 145016 MD. MUZADDID ALAM 145025 SOUVIK ROY   145034 MD.TASFIQUR RAHMAN 145044 KAZI AZHARUL ISLAM SAMIN 145053 SHARMIN AKTER URMEE 135030 A.S.M WAHID MURAD